US20020022800A1 - Surgical needle with hand-actuable lock mechanism - Google Patents
Surgical needle with hand-actuable lock mechanism Download PDFInfo
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- US20020022800A1 US20020022800A1 US09/863,074 US86307401A US2002022800A1 US 20020022800 A1 US20020022800 A1 US 20020022800A1 US 86307401 A US86307401 A US 86307401A US 2002022800 A1 US2002022800 A1 US 2002022800A1
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- lock
- needle
- inner member
- arms
- tube
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1001—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy
- A61N5/1027—Interstitial radiation therapy
-
- 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
- A61M37/00—Other apparatus for introducing media into the body; Percutany, i.e. introducing medicines into the body by diffusion through the skin
- A61M37/0069—Devices for implanting pellets, e.g. markers or solid medicaments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/0046—Surgical instruments, devices or methods, e.g. tourniquets with a releasable handle; with handle and operating part separable
- A61B2017/00469—Surgical instruments, devices or methods, e.g. tourniquets with a releasable handle; with handle and operating part separable for insertion of instruments, e.g. guide wire, optical fibre
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B2017/347—Locking means, e.g. for locking instrument in cannula
-
- 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
- A61M25/09—Guide wires
- A61M2025/09125—Device for locking a guide wire in a fixed position with respect to the catheter or the human body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1001—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy
- A61N5/1007—Arrangements or means for the introduction of sources into the body
- A61N2005/1011—Apparatus for permanent insertion of sources
Definitions
- This invention relates generally to surgical tools and, more specifically, to a surgical needle with a hand-actuable lock mechanism for holding one part of the needle approximately fixed relative to another part.
- a surgical needle with a hand-actuable lock mechanism for holding one part of the needle approximately fixed relative to another part.
- One embodiment of the needle includes a hollow needle through which a push rod slides, and the lock is used to hold the push rod fixed relative to the hollow needle.
- Such hollow needle/push rod assemblies often are used when depositing, sampling or removing material within living tissue.
- the lock mechanism of the present invention may be mounted on various types of needles, push rods, catheters, stents, trocars, cannulas, wires and stylets.
- the detailed description of the invention, below, is based on an embodiment that may be used in prostate brachytherapy, in which radioactive seeds are implanted in a human prostate while the needle and seeds are monitored by ultrasound sensors and imaging devices.
- U.S. Pat. Nos. 4,461,280, 4,700,692 and 4,815,449 disclose background information about the deposition of radioactive seeds within human tissue.
- the lock mechanism may be used with other known surgical tools, such as trocar and cannula assemblies, in which an inner member such as a rod or inner hollow needle slidingly fits within and extends through an outer hollow needle to block or interact with an open end of the outer needle.
- an inner member such as a rod or inner hollow needle slidingly fits within and extends through an outer hollow needle to block or interact with an open end of the outer needle.
- fluid and tissue samples may be taken from a specific part of the body by penetrating the desired part of the body with the end of a needle, and then removing a rod from within the needle to open a hollow cavity in the needle and admit fluid or tissue.
- a syringe or other injection device may also or alternatively be attached to the needle if fluids or solids are to be injected. Examples of such tools are found in U.S. Pat. Nos. 5,207,647, 5,242,427, 5,290,304, 5,368,046, and 5,556,411, the disclosures of which are incorporated herein by reference
- the lock of the present invention will be described with reference to a surgical needle that includes a hollow, sharp, pointed needle that extends from a grip, mounted on the needle.
- a push rod extends through the hollow needle to push material through the needle, and the lock is operatively connected to both the needle and rod to lock the rod relative to the needle.
- the lock is formed as part of the grip, and is shaped so that a surgeon may hold and direct the point of the needle, and lock and unlock the lock to selectively limit movement of the push rod relative to the needle.
- This embodiment of the needle may be loaded with material such as radioactive seeds to be deposited within living tissue.
- material such as radioactive seeds to be deposited within living tissue.
- the needle assembly When so loaded, the needle assembly is in a loaded position.
- the material contained within the needle assembly may be extruded by moving either the push rod or the hollow needle relative to the other.
- the push rod When the push rod is inserted fully into the hollow needle, the needle assembly is in an empty position.
- the needle and push rod may be used collectively to deposit material in living tissue, preferably by inserting the needle loaded with material into the tissue. The push rod then is held in a fixed position relative to the tissue and the needle is slid back over the push rod, forcing material out of the needle as the needle is withdrawn from the tissue. By carefully controlling the relative motion of the push rod to the needle, material may be distributed through the tissue as desired, typically along a line traced by the point of the needle as it is withdrawn from the tissue.
- the lock mechanism preferably may be controlled by squeezing and releasing the grip.
- the lock mechanism may be unlocked when the grip is squeezed, and locked when the grip is not squeezed. This has been found to be particularly useful for surgical procedures, because the surgeon will need to have a hand on the device to control its relative motion anyway, and the squeezing of the lock does not limit the surgeon's ability to maneuver the needle.
- the needle When the lock of the assembly is unlocked, the needle preferably slides freely relative to the push rod.
- the lock mechanism is formed by fingers that extend toward the push rod from outwardly biased arms of the grip. Holes are formed within the fingers, oversized relative to the push rod so that it may slide freely through the holes when the arms are squeezed.
- FIG. 1 is a view showing a needle assembly according to the present invention being inserted into living tissue, with the needle assembly in its loaded position.
- FIG. 2 is an enlarged isometric view of the needle assembly of FIG. 1, shown in its empty position.
- FIG. 3 is a greatly enlarged cross-sectional view of the end portion of the assembly shown in FIGS. 1 and 2, shown in a loaded position, with the push rod and radioactive seeds contained within the needle not cross-sectioned.
- FIG. 4 is a view showing an alternative embodiment of the needle assembly of FIG. 1 after it has been inserted into living tissue as far as desired, with the lock of the assembly squeezed so that the needle slides freely relative to the push rod.
- FIG. 5 is a view showing the needle assembly of FIG. 4 after the needle has been withdrawn from the living tissue as far as desired while holding the push rod stationary relative to the living tissue, leaving a trail of seeds within the tissue, with the lock of the assembly squeezed so that the needle slides freely relative to the push rod.
- FIG. 6 is a view showing the needle assembly of FIG. 5 being removed from the living tissue, with the needle locked relative to the push rod so that no additional seeds are deposited into the tissue as the assembly is removed.
- FIG. 7 is a greatly enlarged plan view of the grip portion of the assembly shown in FIGS. 4 - 6 , without a push rod inserted into the grip and needle portions, and with a locked position of the arms of the grip shown in dashed lines and a protective sheath shown in cross section.
- FIG. 8 is a cross-sectional view of the grip shown in FIG. 8, taken along line 8 - 8 in FIG. 7, shown on approximately the same scale as in FIG. 7.
- FIG. 9 is a cross-sectional view of the grip portion of the assembly shown in FIGS. 4 - 6 , taken from a point of view similar to that in FIG. 7, with a push rod inserted into the grip and needle portions, and with the lock of the assembly squeezed so that the push rod slides freely relative to the needle, shown on approximately the same scale as in FIG. 7.
- FIG. 10 is a cross-sectional view of the grip shown in FIG. 9, taken along line 10 - 10 in FIG. 9, shown on approximately the same scale as in FIG. 7.
- FIG. 11 is a cross-sectional view of the grip portion of the assembly shown in FIGS. 4 - 6 , taken from a point of view similar to that in FIG. 7, with a push rod inserted into the grip and needle portions, and with the needle locked relative to the push rod so that the needle does not slide freely relative to the push rod, shown on approximately the same scale as in FIG. 7.
- FIG. 12 is a cross-sectional view of the grip shown in FIG. 11, taken along line 12 - 12 in FIG. 11, shown on approximately the same scale as in FIG. 7.
- FIG. 13 is a cross-sectional view of the grip shown in FIG. 1, taken along line 13 - 13 in FIG. 1, shown on approximately the same scale as in FIG. 7.
- FIG. 14 is a cross-sectional view of the grip shown in FIG. 13, rotated about the long axis of the needle.
- FIG. 15 is an isometric view of the alternative embodiment of the needle assembly of FIGS. 4 - 12 .
- FIG. 16 is a view of the needle assembly embodiment of FIG. 16, viewed similarly to FIG. 1, with the needle in its loaded position, inserted into living tissue.
- a surgical needle assembly 10 is shown inserted into a portion of a human body 100 .
- Assembly 10 includes an open-ended, hollow needle 12 , also referred to as a slender outer tube or delivery tube.
- a grip 14 is mounted on or attached to one end of needle 12 so that needle 12 may be manipulated easily by a human hand.
- a push rod 16 extends through needle 12 to form a type of plunger or piston, as described in more detail below.
- a handle 18 is formed on the end of rod 16 , so that rod 16 may be manipulated by a human hand, separately or in conjunction with the manipulation of needle 12 .
- needle 12 and push rod 16 are made of surgical grade stainless steel, and grip 14 and handle 18 are made of medical grade polycarbonate, but other metals, plastics and composites may be used.
- Grip 14 includes a lock 20 to hold rod 16 relative to needle 12 by frictional forces between lock 20 and rod 16 , when the moving elements of lock 20 are allowed to move outwardly to an unsqueezed position. Rod 16 is therefore locked so that it does not slip into or out of needle 12 .
- lock 20 is squeezed, as shown in dashed lines in FIG. 2, the frictional forces are removed, so that rod 16 slips freely relative to needle 12 . This allows rod 16 to be used as a push rod to push out any material stored in hollow needle 12 .
- a sharp point 22 is formed at the end of needle 12 to pierce and penetrate the flesh and tissue of a human body, so that needle 12 may be used as a delivery tube to deliver material to within the flesh or tissue of a human body.
- FIG. 3 details of such material loaded in needle 12 are shown in a greatly enlarged cross-sectional view.
- Radioactive seeds 24 a and spacers 24 b referred to collectively as seeds 24 , are held within hollow needle 12 , ready for delivery to a diseased prostrate.
- Rod 16 includes a blunt end 26 that may be used to push seeds 24 relative to needle 12 , and thereby force seeds 24 out of needle 12 as desired.
- FIGS. 4 through 12, 15 and 16 An alternative embodiment of the surgical needle assembly of the present invention is shown in FIGS. 4 through 12, 15 and 16 .
- Assembly 10 includes a needle 12 and push rod 16 as in the embodiment of FIGS. 1 through 3, 13 and 14 , but is formed with a grip 114 that is shorter than grip 14 of FIGS. 1 - 3 .
- care must be exercised when using the embodiment of FIGS. 4 through 12 not to inadvertently squeeze lock 20 , thereby unlocking rod 16 relative to needle 12 .
- assembly 10 is shown in use to deliver seeds 24 , just discussed. Beginning with FIG. 1, needle 12 is inserted into the flesh and tissue of a human body 100 to a desired point, while lock 20 is in its biased, locked position to hold rod 16 . This prevents undesired movement of rod 16 relative to needle 12 .
- Lock 20 may be held in an unlocked position by one hand (left hand shown), while handle 18 of rod 16 is held by the other hand (right hand shown). While squeezing lock 20 to unlock the locking mechanism, as shown in FIG. 5, and while holding handle 18 of rod 16 steady relative to tissues 100 , needle 12 is withdrawn from tissues 100 .
- two surgeons may perform the procedure as a team, with one surgeon holding handle 18 , while the other surgeon withdraws needle 12 .
- Lock 20 includes a spring in the form of a pair of outwardly extending, resiliently biased arms 28 , molded from a resilient material such as the polycarbonate preferred for grips 14 or 114 , so that the natural, unsprung position of the arms is splayed outwardly, as shown in FIG. 7.
- arms 28 are squeezed together to allow rod 16 to be inserted, arms 28 are springs that press outwardly relative to rod 16 , toward the arms' natural unsprung position.
- Polycarbonate is preferred because it tends to retain its shape memory over time, even if arms 28 are left in an inward position such as that shown in FIG. 9.
- Other materials such as nylon or polypropylene, tend to assume the inward position, so that the effectiveness of lock 20 is lost over time. Regardless of the material used, it is best to leave arms 28 in an extended, outward position as shown in FIG. 7, until the time of use of assembly 10 .
- Each arm 28 includes at least one inwardly extending finger 30 , and each finger 30 includes a hole or passageway 32 , preferably a tapered hole that is teardrop-shaped as shown in FIG. 8.
- one arm 28 includes a pair of fingers 30
- the other arm 28 includes a single finger 30 having tabs 34 extending outwardly near the tapered end of hole 32 .
- Tabs 34 fit within and interlock with holes 32 of the pair of fingers 30 , to hold arms 28 in a partially closed, compressed position, as shown in dashed lines in FIG. 7. This has been found to help in inserting rod 16 through holes 32 when assembling assembly 10 , particularly if this must be done after needle 12 has been inserted into tissue 100 .
- arms 28 are shown squeezed together toward rod 16 , so that the enlarged portions of holes 32 overlap and limited or no contact occurs between rod 16 and holes 32 .
- the locking mechanism is unlocked, allowing free passage of rod 16 through holes 32 .
- the inward movement of arms 28 is limited by the length of fingers 30 , which are stopped by an opposing arm 28 when arms 28 are squeezed toward one another to a fully squeezed position.
- rod 16 is locked by the tapered portions of holes 32 , as shown in FIGS. 11 and 12.
- This releasable locking mechanism provides sufficient holding force for the operation described above with respect to FIGS. 1, 4, 5 , and 6 . It is selectively actuable by the surgeon using very simple hand movements, and does not interfere with the surgeon's control of the placement of needle 12 within body 100 .
- Holes 32 include V-shaped locking surfaces formed as part of the teardrop-shape of holes 32 , shown best in FIG. 8. These V-shaped locking surfaces are believed to provide reliable locking and unlocking performance of lock 20 , particularly in those embodiments in which oppositely biased arms 28 each include V-shaped locking surfaces, so that the opposing locking surfaces are forced in opposite directions by the spring of arms 28 , each toward rod 16 held within needle 12 .
- V-shaped locking surfaces are believed to provide reliable locking and unlocking performance of lock 20 , particularly in those embodiments in which oppositely biased arms 28 each include V-shaped locking surfaces, so that the opposing locking surfaces are forced in opposite directions by the spring of arms 28 , each toward rod 16 held within needle 12 .
- other shapes may be used with satisfactory results, and perhaps even with superior results.
- holes 32 may be round, oval, square or triangular, with or without a V-shaped or other taper in the locking surfaces relative to the movement of hole 32 with respect to rod 16 .
- hole 32 relative to finger 30 may be such that substantial locking, frictional contact is made with rod 16 at both an unsqueezed and a fully squeezed position of arm 28 , so that rod 16 may be locked in both the unsqueezed and squeezed positions of arm 28 . Limited or no contact is made between rod 16 and hole 32 in an intermediate, unlocked position of arm 28 .
- FIG. 7 Other aspects of grip 114 are identified in FIG. 7, including a funnel 36 that acts as a guide for feeding seeds 24 into needle 12 .
- the interconnection between funnel 36 and needle 12 is seen best in FIG. 11.
- Funnel 36 also guides blunt end 26 of rod 16 when inserting rod 16 into needle 12 .
- a gripping texture 38 formed on arms 28 preferably corrugated.
- a bushing 40 provides a reinforcement for joining grip 114 to needle 12 , and doubles as a plug for receiving a protective sheath 42 , used when storing and handling assembly 10 .
- Sheath 42 preferably is at least as long, if not longer, than needle 12 , protecting against inadvertent punctures and injuries by needle 12 .
- indicia 44 formed on grip 14 provide a visual indication of the orientation of point 22 of needle 12 relative to grip 14 . This is important because the unidirectionally taper formed by the sloped cut of the point tends to drive the point in a particular direction within a body 100 , relative to the long axis of needle 12 . A surgeon may use this tendency to position needle 12 accurately within a body 100 .
- Indicia 44 may simply be printed on grip 14 , or, as shown in FIG. 2, may be formed with sufficient structural relief that indicia 44 provides a tactile as well as a visual indication of orientation.
- the shape of grip 14 shown in FIGS. 2, 13 and 14 also helps a user of assembly 10 position needle within a body 100 .
- Relatively flat surfaces 46 provide a tactile indicator of the location of the point of needle 12 , or at least that the point is at 0-, 90-, 180-, or 270-degrees relative to a particular surface 46 .
- the exact orientation is confirmed by feeling or looking at indicia 44 .
- Grip 14 is formed with slightly rounded corners 48 that roll easily when gripped, allowing a surgeon to rotate needle 12 about its long axis, as shown in FIG. 14.
- markings 50 may be provided on needle 12 , preferably in one-centimeter increments, with every five-centimeters marked or accented, as shown. Similar markings may be applied to rod 16 .
- Bushing 40 is shown to include ribs 52 that help retain protective sheath 42 , discussed above, and to include indicia 44 .
Abstract
Description
- This application is a continuation of U.S. patent application Ser. No. 09/313,881, filed on May 18, 1999 and entitled SURGICAL NEEDLE WITH HAND-ACTUABLE LOCK MECHANISM.
- This invention relates generally to surgical tools and, more specifically, to a surgical needle with a hand-actuable lock mechanism for holding one part of the needle approximately fixed relative to another part. One embodiment of the needle includes a hollow needle through which a push rod slides, and the lock is used to hold the push rod fixed relative to the hollow needle. Such hollow needle/push rod assemblies often are used when depositing, sampling or removing material within living tissue.
- The lock mechanism of the present invention may be mounted on various types of needles, push rods, catheters, stents, trocars, cannulas, wires and stylets. The detailed description of the invention, below, is based on an embodiment that may be used in prostate brachytherapy, in which radioactive seeds are implanted in a human prostate while the needle and seeds are monitored by ultrasound sensors and imaging devices. U.S. Pat. Nos. 4,461,280, 4,700,692 and 4,815,449, the disclosures of which are incorporated herein by reference, disclose background information about the deposition of radioactive seeds within human tissue.
- The lock mechanism may be used with other known surgical tools, such as trocar and cannula assemblies, in which an inner member such as a rod or inner hollow needle slidingly fits within and extends through an outer hollow needle to block or interact with an open end of the outer needle. For example, fluid and tissue samples may be taken from a specific part of the body by penetrating the desired part of the body with the end of a needle, and then removing a rod from within the needle to open a hollow cavity in the needle and admit fluid or tissue. A syringe or other injection device may also or alternatively be attached to the needle if fluids or solids are to be injected. Examples of such tools are found in U.S. Pat. Nos. 5,207,647, 5,242,427, 5,290,304, 5,368,046, and 5,556,411, the disclosures of which are incorporated herein by reference.
- The lock of the present invention will be described with reference to a surgical needle that includes a hollow, sharp, pointed needle that extends from a grip, mounted on the needle. A push rod extends through the hollow needle to push material through the needle, and the lock is operatively connected to both the needle and rod to lock the rod relative to the needle. The lock is formed as part of the grip, and is shaped so that a surgeon may hold and direct the point of the needle, and lock and unlock the lock to selectively limit movement of the push rod relative to the needle.
- This embodiment of the needle may be loaded with material such as radioactive seeds to be deposited within living tissue. When so loaded, the needle assembly is in a loaded position. The material contained within the needle assembly may be extruded by moving either the push rod or the hollow needle relative to the other. When the push rod is inserted fully into the hollow needle, the needle assembly is in an empty position.
- The needle and push rod may be used collectively to deposit material in living tissue, preferably by inserting the needle loaded with material into the tissue. The push rod then is held in a fixed position relative to the tissue and the needle is slid back over the push rod, forcing material out of the needle as the needle is withdrawn from the tissue. By carefully controlling the relative motion of the push rod to the needle, material may be distributed through the tissue as desired, typically along a line traced by the point of the needle as it is withdrawn from the tissue.
- The lock mechanism preferably may be controlled by squeezing and releasing the grip. For example, the lock mechanism may be unlocked when the grip is squeezed, and locked when the grip is not squeezed. This has been found to be particularly useful for surgical procedures, because the surgeon will need to have a hand on the device to control its relative motion anyway, and the squeezing of the lock does not limit the surgeon's ability to maneuver the needle.
- When the lock of the assembly is unlocked, the needle preferably slides freely relative to the push rod. In one embodiment of the invention, the lock mechanism is formed by fingers that extend toward the push rod from outwardly biased arms of the grip. Holes are formed within the fingers, oversized relative to the push rod so that it may slide freely through the holes when the arms are squeezed.
- The advantages of the present invention and its various embodiments will be understood more readily after a consideration of the drawings and the Detailed Description of the Preferred Embodiment.
- FIG. 1 is a view showing a needle assembly according to the present invention being inserted into living tissue, with the needle assembly in its loaded position.
- FIG. 2 is an enlarged isometric view of the needle assembly of FIG. 1, shown in its empty position.
- FIG. 3 is a greatly enlarged cross-sectional view of the end portion of the assembly shown in FIGS. 1 and 2, shown in a loaded position, with the push rod and radioactive seeds contained within the needle not cross-sectioned.
- FIG. 4 is a view showing an alternative embodiment of the needle assembly of FIG. 1 after it has been inserted into living tissue as far as desired, with the lock of the assembly squeezed so that the needle slides freely relative to the push rod.
- FIG. 5 is a view showing the needle assembly of FIG. 4 after the needle has been withdrawn from the living tissue as far as desired while holding the push rod stationary relative to the living tissue, leaving a trail of seeds within the tissue, with the lock of the assembly squeezed so that the needle slides freely relative to the push rod.
- FIG. 6 is a view showing the needle assembly of FIG. 5 being removed from the living tissue, with the needle locked relative to the push rod so that no additional seeds are deposited into the tissue as the assembly is removed.
- FIG. 7 is a greatly enlarged plan view of the grip portion of the assembly shown in FIGS.4-6, without a push rod inserted into the grip and needle portions, and with a locked position of the arms of the grip shown in dashed lines and a protective sheath shown in cross section.
- FIG. 8 is a cross-sectional view of the grip shown in FIG. 8, taken along line8-8 in FIG. 7, shown on approximately the same scale as in FIG. 7.
- FIG. 9 is a cross-sectional view of the grip portion of the assembly shown in FIGS.4-6, taken from a point of view similar to that in FIG. 7, with a push rod inserted into the grip and needle portions, and with the lock of the assembly squeezed so that the push rod slides freely relative to the needle, shown on approximately the same scale as in FIG. 7.
- FIG. 10 is a cross-sectional view of the grip shown in FIG. 9, taken along line10-10 in FIG. 9, shown on approximately the same scale as in FIG. 7.
- FIG. 11 is a cross-sectional view of the grip portion of the assembly shown in FIGS.4-6, taken from a point of view similar to that in FIG. 7, with a push rod inserted into the grip and needle portions, and with the needle locked relative to the push rod so that the needle does not slide freely relative to the push rod, shown on approximately the same scale as in FIG. 7.
- FIG. 12 is a cross-sectional view of the grip shown in FIG. 11, taken along line12-12 in FIG. 11, shown on approximately the same scale as in FIG. 7.
- FIG. 13 is a cross-sectional view of the grip shown in FIG. 1, taken along line13-13 in FIG. 1, shown on approximately the same scale as in FIG. 7.
- FIG. 14 is a cross-sectional view of the grip shown in FIG. 13, rotated about the long axis of the needle.
- FIG. 15 is an isometric view of the alternative embodiment of the needle assembly of FIGS.4-12.
- FIG. 16 is a view of the needle assembly embodiment of FIG. 16, viewed similarly to FIG. 1, with the needle in its loaded position, inserted into living tissue.
- Referring to FIG. 1, a
surgical needle assembly 10 according to the present invention is shown inserted into a portion of ahuman body 100.Assembly 10 includes an open-ended,hollow needle 12, also referred to as a slender outer tube or delivery tube. Agrip 14 is mounted on or attached to one end ofneedle 12 so thatneedle 12 may be manipulated easily by a human hand. Apush rod 16 extends throughneedle 12 to form a type of plunger or piston, as described in more detail below. Ahandle 18 is formed on the end ofrod 16, so thatrod 16 may be manipulated by a human hand, separately or in conjunction with the manipulation ofneedle 12. Preferably,needle 12 andpush rod 16 are made of surgical grade stainless steel, andgrip 14 andhandle 18 are made of medical grade polycarbonate, but other metals, plastics and composites may be used. - Referring to FIG. 2,
assembly 10 is shown in isometric view, with portions ofneedle 12 androd 16 removed to fit the image of the assembly within the drawing page.Grip 14 includes alock 20 to holdrod 16 relative toneedle 12 by frictional forces betweenlock 20 androd 16, when the moving elements oflock 20 are allowed to move outwardly to an unsqueezed position.Rod 16 is therefore locked so that it does not slip into or out ofneedle 12. Whenlock 20 is squeezed, as shown in dashed lines in FIG. 2, the frictional forces are removed, so thatrod 16 slips freely relative toneedle 12. This allowsrod 16 to be used as a push rod to push out any material stored inhollow needle 12. - Still referring to FIG. 2, a
sharp point 22 is formed at the end ofneedle 12 to pierce and penetrate the flesh and tissue of a human body, so thatneedle 12 may be used as a delivery tube to deliver material to within the flesh or tissue of a human body. For example, in FIG. 3 details of such material loaded inneedle 12 are shown in a greatly enlarged cross-sectional view.Radioactive seeds 24 a andspacers 24 b, referred to collectively asseeds 24, are held withinhollow needle 12, ready for delivery to a diseased prostrate.Rod 16 includes ablunt end 26 that may be used to pushseeds 24 relative toneedle 12, and thereby forceseeds 24 out ofneedle 12 as desired. - An alternative embodiment of the surgical needle assembly of the present invention is shown in FIGS. 4 through 12,15 and 16.
Assembly 10 includes aneedle 12 and pushrod 16 as in the embodiment of FIGS. 1 through 3, 13 and 14, but is formed with agrip 114 that is shorter thangrip 14 of FIGS. 1-3. However, care must be exercised when using the embodiment of FIGS. 4 through 12 not to inadvertently squeezelock 20, thereby unlockingrod 16 relative toneedle 12. For example, it has been found best to holdassembly 10 as shown in FIG. 16 to avoid unlockingrod 16. - In FIGS. 1, 4,5, and 6,
assembly 10 is shown in use to deliverseeds 24, just discussed. Beginning with FIG. 1,needle 12 is inserted into the flesh and tissue of ahuman body 100 to a desired point, whilelock 20 is in its biased, locked position to holdrod 16. This prevents undesired movement ofrod 16 relative toneedle 12. - After insertion to the desired point, for example within a
prostate 102, as shown in FIG. 4, the operator's hands may be readjusted to a position suitable for depositing seeds withinprostate 102.Lock 20 may be held in an unlocked position by one hand (left hand shown), while handle 18 ofrod 16 is held by the other hand (right hand shown). While squeezinglock 20 to unlock the locking mechanism, as shown in FIG. 5, and while holdinghandle 18 ofrod 16 steady relative totissues 100,needle 12 is withdrawn fromtissues 100. Alternatively, two surgeons may perform the procedure as a team, with onesurgeon holding handle 18, while the other surgeon withdrawsneedle 12. - As
needle 12 is withdrawn,radioactive seeds 24 are forced out ofneedle 12 byblunt end 26 ofrod 16. Becauseneedle 12 moves androd 16 andseeds 24 remain essentially stationary relative tobody 100 during this step of the procedure,seeds 24 are deposited in a line corresponding to the prior location ofneedle 12. As used herein, “line” may be more or less precise, depending on the type of material deposited inbody 100, the properties of the tissue in which the line is deposited, the skill of thesurgeon operating assembly 10, and other factors. A deposited line may also be straight or curved, regular or irregular, based on similar factors and based on the flexibility ofneedle 12 androd 16. - Once a desired amount of
seeds 24 have been deposited inbody 100, or once needle 12 has been withdrawn a desired amount frombody 100, the squeezing pressure onlock 20 is removed. This locksrod 16 relative toneedle 12, so thatneedle 12 androd 16 may be removed without pushing additionalradioactive seeds 24 out ofneedle 12, as shown in FIG. 6. If desired, the hand position onassembly 10 may be changed for this final removal step, as shown in FIG. 6. - Referring now to FIGS. 7 through 12,
lock 20 and other features ofdevice 10 will be described in detail. In FIG. 7, lock 20 is shown prior to the insertion ofrod 16 intoneedle 12.Lock 20 includes a spring in the form of a pair of outwardly extending, resiliently biasedarms 28, molded from a resilient material such as the polycarbonate preferred forgrips arms 28 are squeezed together to allowrod 16 to be inserted,arms 28 are springs that press outwardly relative torod 16, toward the arms' natural unsprung position. - Polycarbonate is preferred because it tends to retain its shape memory over time, even if
arms 28 are left in an inward position such as that shown in FIG. 9. Other materials, such as nylon or polypropylene, tend to assume the inward position, so that the effectiveness oflock 20 is lost over time. Regardless of the material used, it is best to leavearms 28 in an extended, outward position as shown in FIG. 7, until the time of use ofassembly 10. - Each
arm 28 includes at least one inwardly extendingfinger 30, and eachfinger 30 includes a hole orpassageway 32, preferably a tapered hole that is teardrop-shaped as shown in FIG. 8. Preferably, onearm 28 includes a pair offingers 30, and theother arm 28 includes asingle finger 30 havingtabs 34 extending outwardly near the tapered end ofhole 32.Tabs 34 fit within and interlock withholes 32 of the pair offingers 30, to holdarms 28 in a partially closed, compressed position, as shown in dashed lines in FIG. 7. This has been found to help in insertingrod 16 throughholes 32 when assemblingassembly 10, particularly if this must be done afterneedle 12 has been inserted intotissue 100. - In FIGS. 9 and 10,
arms 28 are shown squeezed together towardrod 16, so that the enlarged portions ofholes 32 overlap and limited or no contact occurs betweenrod 16 and holes 32. Thus the locking mechanism is unlocked, allowing free passage ofrod 16 throughholes 32. The inward movement ofarms 28 is limited by the length offingers 30, which are stopped by an opposingarm 28 whenarms 28 are squeezed toward one another to a fully squeezed position. Whenarms 28 are not squeezed,rod 16 is locked by the tapered portions ofholes 32, as shown in FIGS. 11 and 12. This releasable locking mechanism provides sufficient holding force for the operation described above with respect to FIGS. 1, 4, 5, and 6. It is selectively actuable by the surgeon using very simple hand movements, and does not interfere with the surgeon's control of the placement ofneedle 12 withinbody 100. - Holes32 include V-shaped locking surfaces formed as part of the teardrop-shape of
holes 32, shown best in FIG. 8. These V-shaped locking surfaces are believed to provide reliable locking and unlocking performance oflock 20, particularly in those embodiments in which oppositely biasedarms 28 each include V-shaped locking surfaces, so that the opposing locking surfaces are forced in opposite directions by the spring ofarms 28, each towardrod 16 held withinneedle 12. However, other shapes may be used with satisfactory results, and perhaps even with superior results. For example, holes 32 may be round, oval, square or triangular, with or without a V-shaped or other taper in the locking surfaces relative to the movement ofhole 32 with respect torod 16. Furthermore, the size ofhole 32 relative tofinger 30 may be such that substantial locking, frictional contact is made withrod 16 at both an unsqueezed and a fully squeezed position ofarm 28, so thatrod 16 may be locked in both the unsqueezed and squeezed positions ofarm 28. Limited or no contact is made betweenrod 16 andhole 32 in an intermediate, unlocked position ofarm 28. - Other aspects of
grip 114 are identified in FIG. 7, including afunnel 36 that acts as a guide for feedingseeds 24 intoneedle 12. The interconnection betweenfunnel 36 andneedle 12 is seen best in FIG. 11.Funnel 36 also guidesblunt end 26 ofrod 16 when insertingrod 16 intoneedle 12. - Also shown in FIG. 7 is a gripping
texture 38 formed onarms 28, preferably corrugated. Finally, abushing 40 provides a reinforcement for joininggrip 114 toneedle 12, and doubles as a plug for receiving aprotective sheath 42, used when storing and handlingassembly 10.Sheath 42 preferably is at least as long, if not longer, thanneedle 12, protecting against inadvertent punctures and injuries byneedle 12. - Referring again to FIG. 2,
indicia 44 formed ongrip 14 provide a visual indication of the orientation ofpoint 22 ofneedle 12 relative to grip 14. This is important because the unidirectionally taper formed by the sloped cut of the point tends to drive the point in a particular direction within abody 100, relative to the long axis ofneedle 12. A surgeon may use this tendency to positionneedle 12 accurately within abody 100.Indicia 44 may simply be printed ongrip 14, or, as shown in FIG. 2, may be formed with sufficient structural relief that indicia 44 provides a tactile as well as a visual indication of orientation. - The shape of
grip 14 shown in FIGS. 2, 13 and 14 also helps a user ofassembly 10 position needle within abody 100. Relativelyflat surfaces 46 provide a tactile indicator of the location of the point ofneedle 12, or at least that the point is at 0-, 90-, 180-, or 270-degrees relative to aparticular surface 46. The exact orientation is confirmed by feeling or looking atindicia 44.Grip 14 is formed with slightly roundedcorners 48 that roll easily when gripped, allowing a surgeon to rotateneedle 12 about its long axis, as shown in FIG. 14. - Referring once again to FIG. 2,
markings 50 may be provided onneedle 12, preferably in one-centimeter increments, with every five-centimeters marked or accented, as shown. Similar markings may be applied torod 16.Bushing 40 is shown to includeribs 52 that help retainprotective sheath 42, discussed above, and to includeindicia 44. - The foregoing description of the preferred embodiment of the invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and many modifications and variations are possible in light of the above teaching. The embodiment was chosen and described in order to best explain the principles of the invention and its practical application to thereby enable others skilled in the art to best utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined only by the scope of the issued claims.
Claims (27)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/863,074 US20020022800A1 (en) | 1998-05-18 | 2001-05-21 | Surgical needle with hand-actuable lock mechanism |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US8585598P | 1998-05-18 | 1998-05-18 | |
US09/313,881 US6235001B1 (en) | 1998-05-18 | 1999-05-18 | Surgical needle with hand-actuable lock mechanism |
US09/863,074 US20020022800A1 (en) | 1998-05-18 | 2001-05-21 | Surgical needle with hand-actuable lock mechanism |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/313,881 Continuation US6235001B1 (en) | 1998-05-18 | 1999-05-18 | Surgical needle with hand-actuable lock mechanism |
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Publication Number | Publication Date |
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US20020022800A1 true US20020022800A1 (en) | 2002-02-21 |
Family
ID=37012076
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US09/313,881 Expired - Fee Related US6235001B1 (en) | 1998-05-18 | 1999-05-18 | Surgical needle with hand-actuable lock mechanism |
US09/863,074 Abandoned US20020022800A1 (en) | 1998-05-18 | 2001-05-21 | Surgical needle with hand-actuable lock mechanism |
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Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/313,881 Expired - Fee Related US6235001B1 (en) | 1998-05-18 | 1999-05-18 | Surgical needle with hand-actuable lock mechanism |
Country Status (3)
Country | Link |
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US (2) | US6235001B1 (en) |
AU (1) | AU4190799A (en) |
WO (1) | WO1999059650A2 (en) |
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US20070083219A1 (en) * | 2005-10-12 | 2007-04-12 | Buiser Marcia S | Embolic coil introducer sheath locking mechanisms |
US20080132911A1 (en) * | 2006-11-27 | 2008-06-05 | Mediguide Ltd. | System and method for navigating a surgical needle toward an organ of the body of a patient |
WO2011094322A3 (en) * | 2010-01-26 | 2011-12-08 | Warsaw Orthopedic, Inc. | Needle guide system |
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US11478587B2 (en) | 2016-11-08 | 2022-10-25 | Warsaw Orthopedic, Inc. | Drug depot delivery system and method |
US11672946B2 (en) | 2019-09-24 | 2023-06-13 | Boston Scientific Scimed, Inc. | Protection and actuation mechanism for controlled release of implantable embolic devices |
US11759614B2 (en) | 2015-11-23 | 2023-09-19 | Warsaw Orthopedic, Inc. | Enhanced stylet for drug depot injector |
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US20070083219A1 (en) * | 2005-10-12 | 2007-04-12 | Buiser Marcia S | Embolic coil introducer sheath locking mechanisms |
US20080132911A1 (en) * | 2006-11-27 | 2008-06-05 | Mediguide Ltd. | System and method for navigating a surgical needle toward an organ of the body of a patient |
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US8971993B2 (en) | 2010-11-19 | 2015-03-03 | Mediguide Ltd. | Systems and methods for navigating a surgical device |
US10384048B2 (en) | 2014-07-25 | 2019-08-20 | Warsaw Orthopedic, Inc. | Drug delivery device and methods having an occluding member |
US11464958B2 (en) | 2014-07-25 | 2022-10-11 | Warsaw Orthopedic, Inc. | Drug delivery methods having an occluding member |
US10478603B2 (en) | 2014-07-25 | 2019-11-19 | Warsaw Orthopedic, Inc. | Drug delivery device and methods having a retaining member |
US11504513B2 (en) | 2014-07-25 | 2022-11-22 | Warsaw Orthopedic, Inc. | Drug delivery device and methods having a retaining member |
WO2016130082A1 (en) * | 2015-02-13 | 2016-08-18 | Chee Yen Lim | Painless drug implanter |
US20180021556A1 (en) * | 2015-02-13 | 2018-01-25 | Chee Yen Lim | Painless drug implanter |
US11759614B2 (en) | 2015-11-23 | 2023-09-19 | Warsaw Orthopedic, Inc. | Enhanced stylet for drug depot injector |
US10549081B2 (en) | 2016-06-23 | 2020-02-04 | Warsaw Orthopedic, Inc. | Drug delivery device and methods having a retaining member |
US11413442B2 (en) | 2016-06-23 | 2022-08-16 | Warsaw Orthopedic, Inc. | Drug delivery device and methods having a retaining member |
US11478587B2 (en) | 2016-11-08 | 2022-10-25 | Warsaw Orthopedic, Inc. | Drug depot delivery system and method |
CN113543833A (en) * | 2019-03-08 | 2021-10-22 | 波士顿科学国际有限公司 | Clip lock type sheath retaining mechanism |
US11612724B2 (en) | 2019-03-08 | 2023-03-28 | Boston Scientific Scimed, Inc. | Pinch-lock sheath retention mechanism |
WO2020185577A1 (en) * | 2019-03-08 | 2020-09-17 | Boston Scientific Scimed, Inc. | Pinch-lock sheath retention mechanism |
US11672946B2 (en) | 2019-09-24 | 2023-06-13 | Boston Scientific Scimed, Inc. | Protection and actuation mechanism for controlled release of implantable embolic devices |
Also Published As
Publication number | Publication date |
---|---|
WO1999059650A2 (en) | 1999-11-25 |
AU4190799A (en) | 1999-12-06 |
US6235001B1 (en) | 2001-05-22 |
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Legal Events
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AS | Assignment |
Owner name: CP MEDICAL CORPORATION, OREGON Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FERGUSON, PATRIC, J.;REEL/FRAME:016556/0107 Effective date: 20050413 |
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AS | Assignment |
Owner name: CP MEDICAL INC., OREGON Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:O'HOLLORAN, BRIAN;REEL/FRAME:016334/0169 Effective date: 20050414 Owner name: CP MEDICAL, INC., OREGON Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FERGUSON, PATRICK J.;REEL/FRAME:016334/0045 Effective date: 20050413 |
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