US20070021770A1 - Apparatus and Method for Percutaneous Sealing of Blood Vessel Punctures - Google Patents
Apparatus and Method for Percutaneous Sealing of Blood Vessel Punctures Download PDFInfo
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- US20070021770A1 US20070021770A1 US11/537,024 US53702406A US2007021770A1 US 20070021770 A1 US20070021770 A1 US 20070021770A1 US 53702406 A US53702406 A US 53702406A US 2007021770 A1 US2007021770 A1 US 2007021770A1
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- catheter
- locating
- puncture
- distal end
- introducer
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/02—Holding devices, e.g. on the body
- A61M25/04—Holding devices, e.g. on the body in the body, e.g. expansible
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/06—Body-piercing guide needles or the like
- A61M25/0662—Guide tubes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/1011—Multiple balloon catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/08—Wound clamps or clips, i.e. not or only partly penetrating the tissue ; Devices for bringing together the edges of a wound
- A61B17/085—Wound clamps or clips, i.e. not or only partly penetrating the tissue ; Devices for bringing together the edges of a wound with adhesive layer
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00535—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated
- A61B2017/00557—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated inflatable
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
- A61B2017/00672—Locating means therefor, e.g. bleed back lumen
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/39—Markers, e.g. radio-opaque or breast lesions markers
Abstract
A device for promoting hemostasis in a blood vessel puncture is employed with an introducer that accesses the puncture through an incision. The introducer has an open distal end positionable at the puncture, an external portion with an open proximal end, and an axial channel therebetween. The device includes a hollow catheter, dimensioned to pass through the introducer channel, having a distal end to which is attached an expansible compression element, which may be an inflatable balloon, a collapsible prong assembly, or a resilient foam pad. The compression element is collapsed when the distal end of the catheter is enclosed within the introducer. When the catheter and the introducer are located the desired distance from the puncture, the introducer is displaced axially relative to the catheter to expose the compression element to the subcutaneous tissue, whereupon the compression element is expanded. Pressure is applied to the compression element through the introducer to promote hemostasis by the compression of subcutaneous tissue adjacent the puncture. The device preferably includes a locator member passing into the blood vessel through the puncture. The locator member may be either a guide wire, or a hollow tube with a locating balloon, disposed near the portion of the tube insertable into the vessel. A dissolvable locating tip element, connected to the distal end of the catheter, may be used to maintain the position of the device while hemostasis takes place after the locator member is removed.
Description
- This application is a continuation-in-part of co-pending application Ser. No. 08/528,892; filed Sep. 15, 1995; issuing as U.S. Pat. No. 5,645,566.
- Not Applicable
- The present invention relates generally to the field of apparatus and methods for sealing wounds in the blood vessels of humans or animals. More specifically, the invention relates to a guided vascular compression device for percutaneously sealing arterial or venous punctures subsequent to surgical procedures, by promoting in situ hemostasis.
- Ad A large number of medical therapeutic and diagnostic procedures involve the percutaneous introduction of instrumentation into a vein or artery. For example, percutaneous transluminal coronary angioplasty (PTCA), most often involving access to the femoral artery, is performed hundreds of thousands of times annually, and the number of other such vessel-piercing procedures performed, e.g., percutaneous coronary angiography and atherectomy, has exceeded two million per year.
- In each event, the closing and subsequent healing of the resultant vascular puncture is critical to the successful completion of the procedure. Traditionally, the application of external pressure to the skin entry site by a nurse or physician has been employed to stem bleeding from the wound until clotting and tissue rebuilding have sealed the perforation. In some situations, this pressure must be maintained for half at hour to an hour or more, during which the patient is uncomfortably immobilized, often with sandbags and the like. With externally applied manual pressure, both patient comfort and practitioner efficiency are impaired. Additionally, a risk of hematoma exists since bleeding from the vessel may continue until sufficient clotting effects hemostasis. Also, external pressure devices, such as femoral compression systems, may be unsuitable for patients with substantial amounts of subcutaneous adipose tissue, since the skin surface may be a considerable distance from the vascular puncture site, thereby rendering skin compression inaccurate and thus less effective.
- More recently, devices have been proposed to promote hemostasis directly at the site of the vascular perforation. One class of such puncture sealing devices features intraluminal plugs, as disclosed in U.S. Pat. No. 4,852,568—Kensey; U.S. Pat. No. 4,890,612—Kensey; U.S. Pat. No. 5,021,059—Kensey et al.; and U.S. Pat. No. 5,061,774—Kensey. This class of device is characterized by the placement of an object within the bloodstream of the vessel to close the puncture.
- Another approach to subcutaneous puncture closure involves delivery of tissue adhesives to the perforation site, as disclosed in U.S. Pat. No. 5,383,899—Hammerslag. Some likelihood exists of introducing the adhesive so employed disadvantageously into the bloodstream. U.S. Pat. No. 4,929,246—Sinofsky discloses the concept of applying pressure directly to an artery, and relies on the directing of laser energy through an optical fiber to cauterize the wound.
- Yet another proposed solution to obviate the reliance on skin surface pressure is disclosed in U.S. Pat. No. 5,275,616—Fowler, wherein a cylindrical plug is inserted along the shaft of a catheter segment extending from the skin surface to the blood vessel. The catheter is then removed so that the plug can expand as fluid is drawn into the plug from the vessel and surrounding tissue. Unless pressure is applied, however, bleeding may occur around the plug into the subcutaneous tissue. Another approach that similarly deposits a plug into the tissue channel is disclosed in U.S. Pat. No. 5,391,183—Janzen et al., which discloses a variety of plug delivery devices including threaded plug pushers and multilegged channels. As in the other disclosed methods for introducing a foreign plug into the incision, the Janzen et al. plug material, generally resorbable, is not removed from the patient once installed. Such permanent placement of foreign material into the body may result in inflammation or scar formation in the long term.
- Furthermore, many of the prior art devices rely on tactile sensation alone to indicate to the surgeon the proper placement of the puncture closing instrumentation, and may require upstream clamping of the blood vessel to reduce intraluminal pressure to atmospheric at the puncture site.
- As the foregoing description of the prior art demonstrates, none of the heretofore proposed solutions fulfills the need for a relatively simple, non-cautery apparatus and method for subcutaneously applying pressure directly to the vicinity of the vessel puncture by means of a pressure element that is removed from the patient once sealing of the puncture is achieved. There is a further need for a puncture sealing system that features use of instruments already in place at the access site so that the position for possible reentry is not lost, and the time required for the physician to change instrumentation is minimized. There is a still further need for a system that maintains pressure on the puncture site by lightweight mechanical means, thereby relieving the patient from the discomfort of external compression means, and freeing hospital personnel from constant surveillance of cumbersome external pressure structures for the duration of the hemostasis. There is also a need for a hemostatic device that can be effectively employed regardless of the thickness of the tissue between the skin and the puncture site, by applying localized pressure close to the puncture site, rather than remote, diffused pressure to the skin surface.
- It is an object of this invention to provide a method and apparatus for sealing post-surgical vascular punctures that overcome the foregoing deficiencies.
- It is a further object to apply pressure directly to the vicinity of the vascular puncture access site utilizing a subcutaneous pressure element that is removed permanently from the patient once hemostasis is achieved.
- It is another object to employ an introducer instrument already in place at the access site to minimize instrumentation changing time, and to maintain access during an initial clotting period to facilitate possible reentry.
- It is yet another object to maintain adequate hemostatic pressure on an adipose or fatty tissue layer above the puncture site in order to close the puncture naturally, to reduce the potential for pseudo-aneurysm formation, and to maintain such pressure by lightweight, non-labor intensive, mechanical means, thereby reducing patient discomfort.
- The present invention involves a method for sealing a puncture site in a blood vessel, and apparatus for performing that method, wherein use is made of an introducer sheath (commonly referred to in the medical community as an “introducer”) which is usually already in place inside the puncture site when a medical practitioner has completed a procedure that requires intravascular access. Locator means, preferably either a locator tube (having an inflatable locating balloon), or a standard guidewire, is passed through the introducer and into the lumen of the vessel. Alternatively, a dissolvable locating tip can be provided at the distal end of catheter. The locating tip is inserted into the lumen of the vessel, using a guidewire, and maintains the distal end of the catheter in its proper position in the puncture site.
- A semi-rigid catheter, including an expandable compression element at its distal end, and either two axial lumens (used in a compression balloon embodiment) or a single axial lumen (used in other embodiments), is inserted along the locator means fully into the introducer so that the expandable compression element at the distal end of the catheter is contained in an unexpanded state within the distal end of the introducer when the introducer is in a first or distal position relative to the catheter.
- The introducer and the catheter are partially withdrawn together (moved proximally) from the puncture site until a preferred location above the vessel is achieved, the relative axial positions of the introducer and the catheter remaining unchanged, so that the introducer remains in its first or distal position relative to the catheter. This location is chosen to provide for a layer of fatty tissue above the puncture site between the compression element and the vessel. The extent of partial withdrawal is determined by the tactile sense of the practitioner, aided by a marker on a locator tube for the embodiment employing a locating balloon as the locator means, or by fluoroscopic viewing of a contrast medium, for the embodiments employing a guidewire (with or without a dissolvable locating tip) as the locating means.
- When the location is achieved, the introducer is moved to a second or proximal position relative to the catheter until the expandable compression element is revealed and expanded to bear on the fatty tissue layer.
- In another embodiment, the expandable compression element comprises an expandable prong assembly including a resilient spanning sheet for compressing the fatty tissue layer. In still another embodiment, the expandable compression element comprises a foam pad element bearing directly on the fatty tissue layer upon expansion when deployed from the introducer.
- Once the compression element (balloon, prongs or foam tip) is in place, a lightweight holding arrangement is employed to maintain hemostatic pressure. The holding arrangement comprises an adhesive skin patch and fastener strips or bands bringing downward pressure on a sheath cuff clamped to the introducer. After an initial period of hemostasis, (approximately one to five minutes), the locator means (locator balloon tube or guidewire) is removed from the puncture and the apparatus. After another five to twenty-five minutes of pressure on the puncture, the expandable distal end element (compression balloon, prongs or foam) is collapsed, and the introducer and catheter are permanently removed from the patient.
- These and other features and advantages of the present invention will be more readily apparent from the Detailed Description that follows.
-
FIG. 1 is an elevational view, partially in cross section, illustrating a first preferred embodiment of the present invention; -
FIG. 1A is an elevational view, partially-in cross section, illustrating the initial position in a puncture site of the distal portion of the apparatus ofFIG. 1 ; -
FIG. 1B is an elevational view, partially in cross section, illustrating the apparatus ofFIG. 1A in a preferred operational position; -
FIG. 1C is an elevational view, partially in cross section, illustrating the apparatus ofFIG. 1A with the compression balloon revealed and not yet inflated; -
FIG. 1D is a cross sectional view taken along lines 1D-1D ofFIG. 1 , illustrating the dual lumen configuration of a catheter element of the apparatus ofFIG. 1 ; -
FIG. 2 is an elevational view, partially in cross section, of a second preferred embodiment of the present invention, showing the compression mechanism of this embodiment in a retracted state near a vascular puncture site; -
FIG. 2A is a perspective view of the embodiment ofFIG. 2 , showing the compression mechanism in an expanded state; -
FIG. 2B is a view similar to that ofFIG. 2 , showing the a compression mechanism deployed, in its expanded state, at a vascular puncture site; -
FIG. 3 is an elevational view, partially in cross section, of a third preferred embodiment of the present invention, showing the compression mechanism of this embodiment in a retracted state near a vascular puncture site; -
FIG. 3A is a view, similar to that ofFIG. 3 , illustrating the compression mechanism in an expanded state; -
FIG. 4 is a perspective view of a fourth preferred embodiment of the present invention; -
FIG. 4A is an elevational view, partially in cross section, illustrating the initial position in a puncture site of the introducer and guidewire elements of the apparatus ofFIG. 4 ; -
FIG. 4B is a view similar to that ofFIG. 4A , but showing a catheter contained within the introducer when the introducer is in a first axial position relative to the catheter; -
FIG. 4C is an elevational view, partially in cross section, illustrating the apparatus ofFIG. 4A in a preferred operational position; -
FIG. 4D is an elevational view, partially in cross section, illustrating the apparatus ofFIG. 4A with the compression balloon revealed and not yet inflated, the introducer having been moved to a second axial position relative to the catheter; -
FIG. 4E is a perspective view, partially in cross section, illustrating the compression balloon of the apparatus ofFIG. 4D in an inflated state; -
FIG. 4F is an elevational view, partially in cross section, illustrating the apparatus ofFIG. 4E with the guidewire element withdrawn; -
FIG. 5 is an elevational view, partially in cross section, illustrating a modification of the embodiment ofFIG. 1 ; -
FIG. 6 is an elevational view of a modification of the fourth preferred embodiment ofFIGS. 4 through 4 F, having an optional dissolvable locating tip at the distal end of the catheter; -
FIG. 7 is an elevational view of the modified fourth preferred embodiment ofFIG. 6 , showing the present invention deployed at a vascular puncture site, with the locating tip inserted into the lumen of a blood vessel; -
FIG. 8 is an elevational view of a modification of the third preferred embodiment ofFIGS. 3 and 3 A, having an optional dissolvable locating tip; and -
FIG. 9 is an elevational view of an alternative form of a dissolvable locating tip. - 1. Structure of the Apparatus
- A percutaneous blood vessel sealing device, or percutaneous
hemostatic device 10, which applies hemostatic sealing pressure directly to tissue adjacent a vascular puncture site, without employing implanted materials, is shown inFIG. 1 . - In each exemplary embodiment described herein, an introducer sheath (“introducer”) 12, well known in the art, is present in an
incision 14 that extends from theskin surface 16 to a blood vessel (artery or vein) 18 of a patient at the site of ablood vessel puncture 20. Theintroducer 12 has normally been inserted previously to provide access to thevessel 18 for instrumentation (not shown) used in performing a vascular procedure immediately preceding the need to seal thepuncture 20. The initial position of anintroducer 12 so inserted is most clearly illustrated inFIG. 4A , which shows a tapereddistal end 22 of theintroducer 12 at apuncture site 24, inserted within avascular puncture 20. Typically, theintroducer 12 will have a size of approximately 7 French (2.3 mm in diameter), and a length of approximately 130 mm, although a size as large as 14 French (4.7 mm in diameter) may be used for larger punctures. - A working
channel 26, best seen inFIG. 1D , extends axially from theproximal end 28 of theintroducer 12 through its tapereddistal end 22. In the first preferred embodiment ofFIGS. 1 through 1 D, ahollow locator tube 30 extends coaxially through theintroducer 12 and into thevessel 18 through thepuncture 20. Guided by thelocator tube 30 into theintroducer working channel 26 is asemi-rigid catheter 32 having a catheterproximal end 33, and a catheter distal end 34 (FIG. 1A ). Theintroducer 12 is movable axially with respect to thecatheter 32, and is disposed initially at a first axial position, or distal position, in which the catheterdistal end 34 is enclosed or sheathed within thedistal end 22 of theintroducer 12. - The
catheter 32 is a dual-lumen device having a first axial lumen 36 (FIG. 1D ) which encompasses thelocator tube 30 when thecatheter 32 is inserted into the workingchannel 26 of theintroducer 12. A secondaxial lumen 38 is provided with an inflation orifice 40 near its distal end, the inflation orifice communicating with the interior of acompression balloon 42 that concentrically surrounds a portion of the length of thecatheter 32 extending proximally from itsdistal end 34. Thecompression balloon 42 is initially enclosed, in an uninflated state, within thedistal end 22 of theintroducer 12, as illustrated inFIG. 1A . The opposite (proximal) end of the secondaxial lumen 38 communicates with a compression balloon inflation port 44 through aninflation tube 45, as shown inFIGS. 1 and 4 . Overall, thecatheter 32 has an outer diameter sufficiently small to be freely insertable into theintroducer 12, and a length that is greater than that of theintroducer 12, i.e., in the range of about 130 mm to about 750 mm. - At the
proximal end 28 of theintroducer 12 is a well-known luer type lock fitting 46 configured to mate with a catheter proximal end luer fitting 48 when theintroducer 12 and thecatheter 32 are in a final operational position, as determined by manipulation of thelocator tube 30, as will be described below. Thelocator tube 30 has an inflatable intravascular locatingballoon 50 at its distal end portion, shown inFIG. 1A in an uninflated state. The interior of the locatingballoon 50 is in fluid communication with the hollow interior of thelocator tube 30 through a suitable inflation orifice (not shown), as is well known in conventional balloon catheters and the like. - Although the luer locks 46, 48 may be employed for both the locator balloon embodiment (
FIGS. 1 through 1 D) and for embodiments (described below) featuring expandable compression elements other than thecompression balloon 42, a version using no luer locks will be described below that is specifically adapted for use with thecompression balloon 42. Both the luer and non-luer versions are suitable for embodiments employing either theinflatable locating balloon 50 or a guidewire locating means, to be described-below. - Returning now to
FIGS. 1A through 1C , a progression of locating positions for thedevice 10 is illustrated.FIG. 1A shows thelocator tube 30, having theuninflated locating balloon 50 near its distal end, inserted into thevessel 18 through theintroducer 12 and thevascular puncture 20. It is advantageous to construct thelocator tube 30 so that a length of tube extends distally beyond the location of the locatingballoon 50 into thevessel 18 to facilitate re-access through thevascular puncture 20, if required. The entire apparatus 10 (including theintroducer 12 and the catheter 32) is in its initial position relative to the vessel; that is, thedistal tip 22 of theintroducer 12 is located adjacent to or within thepuncture 20, while theintroducer 12 is in its above-described first axial position or distal position relative to thecatheter 32, in which the catheterdistal end 34 and theuninflated compression balloon 42 are enclosed within thedistal end 22 of theintroducer 12. -
FIG. 1B illustrates thedevice 10 after the locatingballoon 50 has been inflated by fluid introduced into it via thelocator tube 30. The entire device 10 (including theintroducer 12 and the catheter 32) has been go partially withdrawn from thepuncture site 24 in the direction of the arrow 52 (i.e., in the proximal direction), to a “preferred operational position”, in which the locatingballoon 50 is lodged against aninterior wall 54 of thevessel 18. Theintroducer 12 remains in its first or distal position, in which the portion of thecatheter 32 carrying theuninflated compression balloon 42 is enclosed within thedistal end 22 of theintroducer 12. - In
FIG. 1C , theintroducer 12 has been moved axially, relative to thecatheter 32, in the direction of the arrow 52 (i.e., proximally), to its second axial position, or proximal position. The movement of theintroducer 12 to this second or proximal position uncovers theuninflated compression balloon 42. - The compression stage of the
device 10 is illustrated next inFIG. 1 . Thecompression balloon 42, inflated via the second axial lumen 38 (FIG. 1D ), rests in an optimal position to effect natural hemostasis, viz., above alaminar portion 56 of the fatty tissue adjacent thepuncture site 24. An optimal distance from thevessel 18 to the catheterdistal end 34 is in the range of 2 mm to 10 mm. This distance will dispose a layer offatty tissue 56 between thevessel 18 and thecatheter 32, minimizing the potential for pseudo-aneurysm. Theintroducer luer lock 46 is shown engaged with thecatheter luer lock 48, assuring that a holding force applied to theintroducer 12 will be transmitted as well to thecatheter 32. In addition, avisible marker band 57 on the exterior of the locatingtubing 30 may advantageously be provided to align the proximal ends of theintroducer 12 and thecatheter 32 in correspondence with the location of the distal ends 22, 34 thereof when thelocator balloon 50 is lodged against theinner wall 54 ofvessel 18. - An
adhesive skin patch 58 with asheath cuff 60 clamped onto the external portion of theintroducer 12 to apply downward force (in the direction of thearrow 62, i.e., distally) on theintroducer 12 is shown inFIGS. 1 and 4 . Fastener strips 64 secure theadhesive patch 58 to thesheath cuff 60. The fastener strips 64 may be elastic bands with suitable adhesive areas, or hook and loop strips (such as the type marketed under the trademark VELCRO) that adhere to areas of complementary material on thepatch 58. Pressure maintained by theintroducer sheath cuff 60 on thecatheter 32 provides hemostatic pressure on thecompression balloon 42 to bear on thetissue layer 56 for a first period of time, whereupon the locatingtube 30 is withdrawn (thelocator balloon 50 having first been deflated), and a second period of time elapses, after which all instrumentation is removed from the patient as will be noted when the method for sealing thepuncture 20 is described in detail below. - Another embodiment of the present invention is illustrated in
FIGS. 2, 2A , and 2B, which show a collapsible prongassembly compression element 66 attached to the catheterdistal end 34. Theprong assembly 66 is radially compressed or collapsed when enclosed within theintroducer 12, when the introducer is in its first or distal position. Theprong assembly 66 expands radially when theintroducer 12 is partially withdrawn from the vessel 18 (FIGS. 2A and 2B ), by moving theintroducer 12 to its second or proximal position in a manner similar to the partial withdrawal ofintroducer 12 in the direction ofarrow 52 as described previously in connection with the compression balloon embodiment. - The
prong assembly 66 comprises a plurality of spaced-apartresilient prongs 68, the proximal ends of which are attached to thecatheter 32, and the distal ends of which are attached to a collapsible spanning film sheet ordam 70, shown expanded inFIGS. 2A and 2B . The sheet ordam 70 allows the application of hemostatic pressure on thetissue 56 above thevessel 18. Acentral aperture 72 in the sheet ordam 70 permits the locator tube (not shown) to project through thecatheter 32 into thevessel 18 as described previously. Since there is no compression balloon to be inflated, a catheter with a singleaxial lumen 36 is adequate for this application. Materials for the spanning sheet ordam 70 may include polyurethane and polyethyleneterephthalate (PET). - Still another embodiment of the invention is illustrated in
FIGS. 3 and 3 A, which show a foampad compression element 74 attached to the catheterdistal end 34. Thefoam pad element 74 is compressed when enclosed within theintroducer 12 when the introducer is in its first or distal position. The foampad compression element 74 then expands when theintroducer 12 is partially withdrawn from thevessel 18, as shown inFIG. 3A , by moving theintroducer 12 to its second or proximal position, as described above with respect to the first and second embodiments. Hemostatic pressure is similarly exerted on thetissue 56 above thevessel 18. Anaxial channel 76 in thefoam pad 74 permits the locator tube (not shown) to project through thecatheter 32 into thevessel 18, as described previously. As with the expanding prong embodiment above, since there is no compression balloon to be inflated, a catheter with a singleaxial lumen 36 is adequate for this embodiment. Materials for thefoam pad 74 may include various polymeric foams, such as polyurethanes, as are well-known in the art. Thefoam pad 74 may be impregnated with a coagulant such as thrombin or protamine to effect local hemostasis. - The foregoing embodiments, featuring both the luer locking of the
introducer 12 with thecatheter 32, and a variety ofexpandable compression elements distal end 34, employ alocator tube 30 with a locatingballoon 50 to determine the optimal operational location for theapparatus 10. In lieu of a locatingballoon 50, aguidewire 78 may be utilized for the location determination of theapparatus 10, as illustrated inFIGS. 4 through 4 F. - In
FIG. 4A , astandard guidewire 78, typically 3 French (1 mm in diameter), shown coaxially located within theintroducer 12, has adistal end 82 extending out of the introducerdistal end 22 into thepuncture 20 of thevessel 18. - The
catheter 32 is shown inFIG. 4B having been inserted into theintroducer 12 and guided to thedistal end 22 of the introducer by theguide wire 78. At thedistal end 34 of thecatheter 32 is a radiopaque marker 84 for viewing under fluoroscopy, as shown inFIG. 4D . -
FIG. 4C shows an optimal location for catheterdistal end 34, radiopaque contrast medium (not shown) having been introduced into thecatheter lumen 36, and theapparatus 10 having been partially withdrawn from thevessel 18 in the direction of the arrow 52 (i.e., proximally). An extravasation 85 of the radiopaque contrast medium is shown marking the desired distance between thevessel 18 and the catheterdistal end 34, as will be explained when the method for sealing the puncture is described below. - The
introducer 12 is shown inFIG. 4D having been moved, in the direction of thearrow 52, to its second or proximal position to reveal theuninflated compression balloon 42 in position for inflating.FIG. 4E illustrates theapparatus 10 with thecompression balloon 42 inflated and in place above thefatty layer 56 to apply hemostatic pressure for a first period of time in order to effect initial closure ofpuncture site 24.FIG. 4F shows theapparatus 10 after theguidewire 78 has been removed from theapparatus 10 and pressure is applied for a second period of time to close thepuncture 20. - In analogous fashion, the
guidewire 78 and radiopaque positioning of an expandable compression element at thedistal end 34 of thecatheter 32 may be employed with the prong assembly and foam pad embodiments described above in connection with thelocator tube 30. For introducing the radiopaque or contrast medium (not shown) into thecatheter lumen 36, a standard hemostatic “Y” 86 is used, as shown inFIG. 4 . The “Y” 86 has amain leg 88 for receiving theguidewire 78 into theaxial lumen 36 of thecatheter 32, while a side port 90 of the “Y” 86 is used for introducing the contrast medium into the same lumen. - A modification of the first (compression balloon) embodiment of the present invention is shown in
FIG. 5 , where anapparatus 110 has anintroducer 112 having no luer connection with acatheter 132. Since thecuff 60 applies downward force in the direction of thearrow 62 only to theintroducer 112 and not to thecatheter 132, the distal end 122 of theintroducer 112 must bear directly on thecompression balloon 42 to exert hemostatic pressure on theballoon 42. Although this modification is suitable only for the compression balloon embodiment of this invention, both thelocator tube 30 and theguidewire 78 may be utilized in this modification for optimal positioning of the catheterdistal end 34. -
FIGS. 6 and 7 illustrate a modification of the fourth preferred embodiment (that ofFIGS. 4 through 4 F). In accordance with this modification, a dissolvable or resorbable locatingtip element 140 is fixed to thedistal end 34 of thecatheter 32, distally from thecompression balloon 42. The locatingtip element 140 is an elongate, tubular member, having a generally cylindricalmain portion 142 and a tapereddistal end tip 144. The diameter of the cylindricalmain portion 142 is preferably about 1.3 to 4.0 mm, and the overall length of the locatingtip 140 element is preferably about 1 to 4 cm, the dimensions of aparticular locating tip 140 being selected in accordance with such factors as the dimensions and location of the puncture site, its “dwell time” (see below), and the preferences of the physician. The locatingtip 140 element is hollow and open-ended to allow theguidewire 78 to pass through it. - The locating
tip element 140 is preferably used in conjunction with locating means such as theguidewire 78 or thelocator tube 30. As shown inFIG. 7 , the locatingtip element 140 is dimensioned so that it can be inserted into theblood vessel lumen 18 through thepuncture site 20, and maintains the location of theapparatus 10 during use, after theguidewire 78 has been withdrawn (see below). The locatingtip element 140 is made of a material that is biocompatibly (non-toxically) dissolved in the blood stream during a period of between about 10 and 60 minutes (the “dwell time”), during which time partial resorption of the material into the subcutaneous tissue results in the detachment of the locatingtip element 140 from thecatheter 32. The detachment leaves a portion of the locatingtip element 140 outside of the blood vessel, to be completely dissolved into the subcutaneous tissue. - Suitable materials for the locating
tip element 140 may include, for example a number of well-known polymers, methyl cellulose, carboxymethyl cellulose, carbowaxes, and gelatin (particularly pigskin gelatin). Among the suitable polymers are polylactic glycolic acids, polyvinyl pyrrolidone, polyvinyl alcohol, polyproline, and polyethylene oxide. - The dissolvable
locating tip element 140 may be employed with other embodiments of the invention, particularly the compressible foam pad embodiment ofFIGS. 3 and 3 A. In this embodiment, as shown inFIG. 8 , afoam pad 74′ is attached to thedistal end 34 of thecatheter 32, and has adistal end 146. A dissolvablelocating tip element 140′, of the type described above, is attached to, and extends distally from, thedistal end 146 of thefoam pad 74′. - It will be appreciated that the dissolvable locating
tip element locating tip element 150 is shown inFIG. 9 . In this alternative form, the dissolvable locatingtip element 150 comprises acylindrical portion 152 attached to the distal end of a surgical instrument 154 (e.g., a catheter). Projecting distally and coaxially from thecylindrical portion 152 is a slendertubular portion 156, terminating in a tapereddistal end tip 158. The distal end of the cylindrical portion defines anannular shoulder 160 surrounding the juncture with thetubular portion 156. The entiredissolvable locating tip 150 may have an axial passage 162 through its length to receive a guidewire or the like (not shown). - The dissolvable
locating tip element 150 ofFIG. 9 may be inserted into a puncture site in a blood vessel, in the manner similar to that discussed above with respect toFIGS. 6 and 7 . In this embodiment, however, only thedistal tip end 158 and an adjacent portion of thetubular portion 156 enter the blood vessel. Thecylindrical portion 152 remains outside the vessel, with theshoulder 160 functioning as a compression element, much as does thefoam pad FIGS. 3, 3A , and 8. In this case, the compression element, being integral with and of the same dissolvable material as the locating tip, likewise dissolves in the patient's tissue after hemostasis has occurred. - 2. Method for Sealing Vascular Punctures
- A brief review of a typical vascular entry procedure may be of value in describing the puncture closure technique of the present invention. To initiate one of the common operations such as the PTCA (Percutaneous Transluminal Coronary Angioplasty) mentioned above, a piercing cannula is inserted into the skin of a patient at an angle of from 25 to 45 degrees until it punctures a blood vessel, e.g., the femoral artery. The vessel may be located one centimeter or more beneath the surface of the skin. A guidewire is inserted through the cannula into the vessel, the cannula is withdrawn, and a catheter introducer sheath is inserted over the guidewire into the puncture site.
- The practitioner then uses the introducer to gain access to the vascular lumen for the instrumentation used to perform the particular procedure. At the conclusion of the procedure, the introducer is the last device remaining in the puncture, which must then be sealed.
- The method of the present invention provides a rapid, permanent, inexpensive sealing of a puncture in a blood vessel, with no foreign implants remaining in the patient. The method can be understood with reference to the drawing figures and the previous description of the apparatus of this invention.
- In
FIG. 1A , anintroducer sheath 12 is shown in apuncture site 24 at the conclusion of a vascular procedure. According to one embodiment of the present invention, alocator tube 30 having aninflatable locating balloon 50 adjacent its distal end is inserted axially through theintroducer 12, into apuncture 20 and extending theuninflated locating balloon 50 into the lumen of avessel 18. - A
dual lumen catheter 32 is passed over thelocator tube 30 so that a first lumen 36 (FIG. 1D ) of thecatheter 32 receives thelocator tube 30. Thelocator tube 30 maintains alignment of thecatheter 32 with thepuncture 20 and allows repeated access into thevessel 18, if necessary. Thecatheter 32, having aninflatable compression balloon 42 at itsdistal end 34, is inserted fully into theintroducer 12 until itsdistal end 34, including theuninflated compression balloon 42, is at thedistal end 22 of theintroducer 12. At this stage, thelocator tube 30 is pushed or pulled until a marker band 57 (shown inFIG. 1 ) is aligned with theproximal end 33 of thecatheter 32. Themarker band 57 is preselected to establish a fixed relationship with thecatheter 32 so that a preferred distance may be maintained between thevessel 18 and thedistal end 34 ofcatheter 32 as will be explained below. Theintroducer 12 being in its first or distal position, theuninflated compression balloon 42 is fully enclosed and contained within the workingchannel 26 of theintroducer 12, as described above. - The practitioner then inflates the locating
balloon 50 via thelocator tube 30, partially withdrawing theintroducer 12, thecatheter 32 and thelocator tube 30 from thepuncture 20 in the direction of thearrow 52, until the locatingballoon 50 lodges against the inner wall of thevessel 18 at thepuncture 20, as illustrated inFIG. 1B . Since the position of the catheterdistal end 34 relative to the introducerdistal end 22 remains unchanged, thedistal end 34 of the catheter is now at the location predetermined by the placement of themarker band 57, preferably about 5 mm to 15 mm from thepuncture 20. This distance will allow a layer of fattysubcutaneous tissue 56 to lie between the catheterdistal end 34 and thepuncture 20. - Once the catheter
distal end 34 is in the desired location, theintroducer 12 is further withdrawn in the direction of thearrow 52, by moving it to its second or proximal position relative to thecatheter 32, as described above, to expose theuninflated compression balloon 42, as shown inFIG. 1C . Theluer fittings catheter 32 and theintroducer 12, respectively, are now connected to each other to lock thecatheter 32 and theintroducer 12 into a fixed position relative to one another, and thecompression balloon 42 is then inflated, as illustrated inFIG. 1 , via a second catheter lumen 38 (FIG. 1D ). Thecompression balloon 42 is then pressed down against thefatty layer 56 above thepuncture site 24, while gentle traction is maintained on the locatingballoon 50, thus compressing theextravascular fatty tissue 56 between theballoons fatty tissue 56 advantageously minimizes the potential of pseudo-aneurysm formation and promotes efficient hemostasis. - To assist in maintaining pressure on the
vessel 18, anintroducer cuff 60 is clamped onto theintroducer 12 and secured to anadhesive patch 58 means of elastic or hook and loop fastening strips 64 (FIGS. 1 and 4 ). When theintroducer 12 is locked with thecatheter 32 by theluer fittings introducer 12 through thesemi-rigid catheter 32 to thecompression balloon 42, maintaining hemostatic pressure on thepuncture site 24 throughfatty tissue 56. - After a first period of time (approximately 5 to 15 minutes), initial clotting of the
puncture 20 will have occurred. The locatingballoon 50 is then deflated and thelocator tube 30 withdrawn from theapparatus 10, leaving only a small (e.g., approximately 1 mm in diameter) portion of theoriginal puncture 20 to clot. Thecompression balloon 42 remains in place for an additional (second) period of time (approximately 5 to 25 minutes), providing hemostasis to thepuncture 20, after which thecompression balloon 42 is deflated and retracted proximally into theintroducer 12, theluer fittings apparatus 10 is completely removed from the patient. - The foregoing method uses an
introducer 12 that is already positioned at the access site so that position is not lost in changing instruments, bleeding does not occur while devices are positioned, and thelocator tube 30 maintains the access location for re-access if needed during the initial clotting of thepuncture 20. Furthermore, employment of the present invention requires minimal physician time and greatly reduces staff time and involvement previously devoted to maintaining supradermal pressure for long periods of hemostasis. In addition, the need for operating room time may be reduced by the removal of the locator tube theintroducer 12 and thecatheter 32 after the patient is returned to go the patient's room. Overall, patient discomfort is significantly lessened through the use of the foregoing method as compared with the traditional manual external compression techniques. - Similar steps are followed for implementing the method of the present invention with the second embodiment of the apparatus described above. In the second embodiment, the compression element at catheter
distal end 34 comprises thecollapsible prong assembly 66, as shown inFIGS. 2, 2A , and 2B. In this second embodiment, once the introducerdistal end 22 is in its initial (first or distal) position (about 5 to 15 mm from the vessel 18) as shown inFIG. 2 , the movement of theintroducer 12 to its second or proximal position releases theprong assembly 66 from confinement within theintroducer 12, allowing theindividual prongs 68 of theprong assembly 66 to expand, as illustrated inFIG. 2A . A resilient spanning sheet ordam 70, supported by the ends of theprongs 68, then allows the application of hemostatic pressure on thefatty tissue layer 56, as described earlier in connection with the compression balloon embodiment. The locator tube (not shown) passes through and is withdrawn from theaperture 72 in the spanningfilm 70. - A third embodiment of the method, following steps substantially identical to the above described procedures, involves the use of the
compressible foam pad 74 shown inFIGS. 3 and 3 A as the compression element at thedistal end 34 of thecatheter 32. - In this third embodiment, when the
catheter 32 is in the preferred location as shown inFIG. 3 , theintroducer 12 is moved from its first or distal position to its second or proximal position (in the direction of the arrow 52) to uncover thefoam pad 74, allowing it to expand, as illustrated inFIG. 3A . The expandedfoam pad 74 exerts hemostatic pressure upon thefatty tissue layer 56, as described previously. The locator tube (not shown) passes through and is withdrawn from thepad channel 76 formed axially in thefoam pad 74. If deemed desirable by the practitioner, a coagulant agent such as collagen, thrombin or protamine may be delivered to the vicinity of the puncture site through thepad channel 76 which communicates with the catheteraxial lumen 36. Alternatively, thefoam pad 74 may be saturated with the agent prior to deployment. - The method employed with the apparatus described above may also use a guidewire 78 (
FIG. 4 ) to perform the locating functions provided by thelocator tube 30 in the previous embodiments. All three of the compression elements, viz., thecompression balloon 42, theexpandable prong element 66 and thefoam pad 74, may be utilized with theguidewire 78. For purposes of illustration,FIGS. 4 through 4 F, showing only thecompression balloon 42 alternative, may be viewed with the understanding that the method to be described in conjunction therewith applies to all three guidewire 78 embodiments. - Referring now to
FIG. 4A , theintroducer 12 is shown as it remains in thepuncture 20 after a vascular access procedure. A conventionalsurgical guidewire 78 is extended through theintroducer 12 so that itsdistal end 82 extends into the lumen of thevessel 18. Thedual lumen catheter 32 is passed over theguidewire 78 so that a first lumen 36 (FIG. 1D ) of thecatheter 32 receives theguide wire 78. Theguidewire 78 maintains alignment of thecatheter 32 with thepuncture 20 and allows re-access into thevessel 18 if it becomes necessary. As described earlier, thecatheter 32, having aninflatable compression balloon 42 at itsdistal end 34, is inserted fully into theintroducer 12 until itsdistal end 34, including theuninflated compression balloon 42, is enclosed within the workingchannel 26 at thedistal end 22 of theintroducer 12, as shown inFIG. 4B . - A radiopaque contrast medium (not shown) is introduced into the catheter
first lumen 36, as illustrated inFIG. 4 . Amain leg 88 of a conventional hemostasis “Y” 86 may be passed over theguidewire 78 and attached to theproximal end 33 of thecatheter lumen 36. The contrast medium is then introduced into thecatheter lumen 36 via a side port 90 of the “Y” 86, and viewed by the practitioner using conventional fluoroscopic techniques. To aid in locating the position of the catheterdistal end 34, a radiopaque marker 84 may be provided at the tip of the catheter distal end 34 (FIG. 4D ). - As the practitioner views the vascular scene under fluoroscopy, the
introducer 12 with thecatheter 32 is partially withdrawn in the direction of thearrow 52 from thepuncture 20. Withdrawal is continued until contrast medium in thecatheter lumen 36 escaping from around theguidewire 78 into thevessel 18 is observed to form an extravasation cloud 85, signifying that theintroducer 12 and thecatheter 32 have exited thepuncture 20. When the practitioner is satisfied through fluoroscopy that the catheterdistal end element 34 is the preferred distance of about 5 to 15 mm from thevessel 18, withdrawal of thecatheter 32 is halted, as shown inFIG. 4C . - The remainder of the closure procedure is essentially the same as described above after the preferred position of the
catheter 32 was determined through thelocator tube 30 method. Theintroducer 12 is moved from its first or distal position relative to thecatheter 32 to its second or proximal position, to expose the uninflated compression balloon as shown inFIG. 4D . Thecompression balloon 42 is then inflated to bear on thefatty tissue layer 56 as shown inFIG. 4E . The locating means (in this embodiment guidewire 78) is then withdrawn from the apparatus after an initial period of clotting (FIG. 4F ). As noted previously, the method employing theguidewire 78 may be effectively adapted for use with the expandable prong element and foam tip embodiments of the present invention. - Still another method of the invention is illustrated in
FIG. 5 , wherein theapparatus 110 differs from theapparatus 10 in that theintroducer 112 and thecatheter 132 are not luer-locked together.FIG. 5 shows the position of thecatheter 132 aligned with avisible marker band 57 on thelocator tube 30, just as in the first embodiment described above. It will be readily understood that the method of this “luerless”apparatus 110 may be equally utilized with theguidewire 78 as with thelocator tube 30 for the compression balloon embodiment of this invention. - When the preferred location of the expanded
compression balloon 42 has been achieved as shown inFIG. 5 , by applying either the guidewire or the locator tube methods previously explained, force must be applied from above to thecompression balloon 42 to maintain hemostatic pressure on thefatty tissue layer 56. The practitioner advances theintroducer 112 downward in the direction of thearrow 62 until the introducerdistal end 22 makes contact with the surface of thecompression balloon 42. This hemostatic pressure is then maintained by securing theintroducer sheath cuff 60 to theskin patch 58 via the fastener strips orbands 64. It will be noted that no downward pressure is being exerted on thecatheter 132 itself, since it has no mechanical interlock with theintroducer 112, as in the previous described embodiments. - Although certain exemplary embodiments of the invention have been described hereinabove, it will be appreciated that a number of variations and modifications may suggest themselves to those skilled in the pertinent arts. For example, a coagulant agent may be applied to any of the above-described compression elements. Such variations and modifications are considered within the spirit and scope of the invention as defined in the claims that follow.
Claims (28)
1-13. (canceled)
14. A locating device for a catheter employed to provide percutaneous sealing of a puncture in a blood vessel, the catheter having a distal end locatable adjacent the puncture, the device comprising:
a locating element on the distal end of the catheter so as to extend distally therefrom, the locating element being dimensioned to permit its entry into the puncture, the locating element being formed from a biocompatible material that dissolves in the bloodstream.
15. The locating device of claim 14 , wherein the locating element comprises a tubular portion dimensioned to permit its entry into the puncture.
16. The locating device of claim 15 , wherein a distal end of the tubular portion is tapered.
17. The locating device of claim 14 , wherein the locating element has an axial passage through its length to receive a guidewire.
18. The locating device of claim 14 , wherein the locating element comprises:
a cylindrical portion; and
a tubular portion extending distally from the cylindrical portion, thereby defining a shoulder at the juncture between the tubular portion and the cylindrical portion, the tubular portion being dimensioned to permit its entry into the puncture.
19. The locating device of claim 18 , wherein the distal end of the tubular portion is tapered.
20. The locating device of claim 18 , wherein the locating element has an axial passage through its length to receive a guidewire.
21. The locating device of claim 14 , wherein the locating element dissolves in the bloodstream during a period of approximately ten to sixty minutes.
22. The locating device of claim 21 , wherein the locating element is made of a material selected from the group consisting of methyl cellulose, carboxymethyl cellulose, carbowax, gelatin, polylactic glycolic acids, polyvinyl pyrrolidone, polyvinyl alcohol, polyproline, and polyethylene oxide.
23. The locating device of claim 18 , wherein the locating element dissolves in the bloodstream during a period of approximately ten to sixty minutes.
24. The locating device of claim 23 , wherein the locating element is made of a material selected from the group consisting of methyl cellulose, carboxymethyl cellulose, carbowax, gelatin, polylactic glycolic acids, polyvinyl pyrrolidone, polyvinyl alcohol, polyproline, and polyethylene oxide.
25. The locating device of claim 24 , further comprising an expandable compression member located on the catheter proximal of the locating element for sealing the puncture in the blood vessel.
26. A device for promoting hemostasis in a blood vessel puncture where the puncture is accessed subcutaneously through a sheath having an axial channel, comprising:
a catheter to be received within the axial channel, the catheter having a distal end; and
an expansible compression means coupled to the distal end, the expansible compression means having a collapsed position when enclosed by the sheath, and an expanded position when exposed to the subcutaneous tissue,
wherein the expansible compression means compresses the subcutaneous tissue adjacent the puncture to promote hemostasis at the puncture.
27. The device of claim 26 wherein the catheter further comprises an axial lumen, wherein the expansible compression means is in fluid communication with the axial lumen and is inflatable by a fluid introduced through the axial lumen, the expansible compression means having a collapsed position when uninflated and an expanded position when inflated.
28. The device of claim 26 wherein the compression means is a foam pad having a distal end.
29. The device of claim 29 wherein the foam pad is made of natural a polymer.
30. The device of claim 29 further comprising a locating member coupled to the foam pad distal end.
31. A device for promoting hemostasis in a blood vessel puncture where the puncture is accessed subcutaneously through a sheath having an axial channel, comprising:
a catheter to be received within the axial channel, the catheter having a distal end and a lumen; and
a foam pad coupled to the distal end, the foam pad having a collapsed position when enclosed within the sheath, and an expanded position when exposed to the subcutaneous tissue;
wherein the foam pad, in the expanded position, compresses the subcutaneous tissue adjacent the puncture to promote hemostasis at the puncture.
32. The device of claim 31 wherein the foam pad further comprises an axial passage to receive a guidewire.
33. The device of claim 32 wherein the foam pad is made of a natural polymer.
34. The device of claim 33 further comprising a locating member extensible through the catheter lumen, the distal end of the catheter, and the foam pad axial passage, the locating member having a distal portion extensible into the interior of the blood vessel through the puncture.
35. The device of claim 34 wherein the locating member further comprises:
a hollow tube extensible axially through the catheter lumen, the distal end of the catheter, and the foam pad axial passage; and
a locating balloon coupled to the distal portion of the locating member, the locating balloon inflatable through the hollow tube when positioned in the interior of the blood vessel.
36. The device of claim 34 wherein the locating member further comprises a wire extensible axially through the catheter lumen, the catheter distal end, the foam pad axial passage, and into the interior of the blood vessel.
37. The device of claim 31 further comprising:
a radiopaque marker coupled to the catheter distal end; and
means for introducing a contrast medium into the catheter lumen.
38. The device of claim 31 further comprising a pressure applying means coupled to an external portion of the sheath.
39. The device of claim 38 wherein the catheter is coupled to the sheath so that the pressure applying means applies downward force to the sheath and catheter when the catheter is diposed within the axial channel.
40. The device of claim 38 wherein the pressure applying means comprises:
a clamping device secured to the external portion of the sheath; and
a skin patch coupled to the clamping device and adhesively attachable to the surface of the skin.
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US12/887,945 US20110014290A1 (en) | 1995-09-15 | 2010-09-22 | System and method for facilitating hemostasis with an absorbable sponge |
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US08/528,892 US5645566A (en) | 1995-09-15 | 1995-09-15 | Apparatus and method for percutaneous sealing of blood vessel punctures |
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US09/365,674 US6371974B1 (en) | 1995-09-15 | 1999-08-02 | Apparatus and method for percutaneous sealing of blood vessel punctures |
US10/107,539 US7175646B2 (en) | 1995-09-15 | 2002-03-25 | Apparatus and method for percutaneous sealing of blood vessel punctures |
US11/537,024 US20070021770A1 (en) | 1995-09-15 | 2006-09-29 | Apparatus and Method for Percutaneous Sealing of Blood Vessel Punctures |
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US12/578,088 Continuation-In-Part US20100029908A1 (en) | 1995-09-15 | 2009-10-13 | Absorbable sponge with contrasting agent |
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US55733306A Continuation-In-Part | 1995-09-15 | 2006-11-20 |
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US10/107,539 Expired - Fee Related US7175646B2 (en) | 1995-09-15 | 2002-03-25 | Apparatus and method for percutaneous sealing of blood vessel punctures |
US11/537,024 Abandoned US20070021770A1 (en) | 1995-09-15 | 2006-09-29 | Apparatus and Method for Percutaneous Sealing of Blood Vessel Punctures |
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US09/365,674 Expired - Lifetime US6371974B1 (en) | 1995-09-15 | 1999-08-02 | Apparatus and method for percutaneous sealing of blood vessel punctures |
US10/107,539 Expired - Fee Related US7175646B2 (en) | 1995-09-15 | 2002-03-25 | Apparatus and method for percutaneous sealing of blood vessel punctures |
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Also Published As
Publication number | Publication date |
---|---|
US6371974B1 (en) | 2002-04-16 |
WO1999002091A1 (en) | 1999-01-21 |
AU742269B2 (en) | 2001-12-20 |
US6071300A (en) | 2000-06-06 |
US20020156495A1 (en) | 2002-10-24 |
US7175646B2 (en) | 2007-02-13 |
EP0994673A4 (en) | 2001-04-18 |
AU8293398A (en) | 1999-02-08 |
EP0994673A1 (en) | 2000-04-26 |
CA2295879C (en) | 2008-10-14 |
CA2295879A1 (en) | 1999-01-21 |
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