CA2447582C - Body canal intrusion instrumentation having bidirectional coefficient of surface friction with body tissue - Google Patents
Body canal intrusion instrumentation having bidirectional coefficient of surface friction with body tissue Download PDFInfo
- Publication number
- CA2447582C CA2447582C CA002447582A CA2447582A CA2447582C CA 2447582 C CA2447582 C CA 2447582C CA 002447582 A CA002447582 A CA 002447582A CA 2447582 A CA2447582 A CA 2447582A CA 2447582 C CA2447582 C CA 2447582C
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- Canada
- Prior art keywords
- flaps
- elongate member
- distal
- medical device
- tip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0125—Catheters carried by the bloodstream, e.g. with parachutes; Balloon catheters specially designed for this purpose
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J15/00—Feeding-tubes for therapeutic purposes
- A61J15/0003—Nasal or oral feeding-tubes, e.g. tube entering body through nose or mouth
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J15/00—Feeding-tubes for therapeutic purposes
- A61J15/0026—Parts, details or accessories for feeding-tubes
- A61J15/003—Means for fixing the tube inside the body, e.g. balloons, retaining means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J15/00—Feeding-tubes for therapeutic purposes
- A61J15/0026—Parts, details or accessories for feeding-tubes
- A61J15/0069—Tubes feeding directly to the intestines, e.g. to the jejunum
-
- 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
- A61M25/0043—Catheters; Hollow probes characterised by structural features
-
- 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
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/0045—Catheters; Hollow probes characterised by structural features multi-layered, e.g. coated
- A61M2025/0046—Coatings for improving slidability
-
- 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
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M2025/006—Catheters; Hollow probes characterised by structural features having a special surface topography or special surface properties, e.g. roughened or knurled surface
-
- 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
Abstract
A medical device, such as a nasal-jejunal feeding tube, having an arrangemen t of flaps cut from the outer surface of the catheter and configured so as to not readily adhere to the catheter outer surface. The arrangement of flap ar e configured to resist egress so as to permit peristaltic contractions of the body to propel the device forward, yet will allow the device to be removed from the body without the flaps causing significant trauma to the tissues of the body canal.
Description
~ .. ~..
BODY CANAL INTRUSION INSTRUMENTATION HAVING
BIDIRECTIONAL COEFFICIENT OF SURFACE FRICTION
WITH BODY TISSUE
TECHNICAL FIELD OF THE INVENTION
This invention relates to instrumentation foriinvading body canals non-destructively and with a minimum of trauma, and more particularly, to the interface between the instruments and body tissue during dynamic ingress and egress of surgical instrumentation into the canals.
BACKGROUND OF THE INVENTION
It has been the direction of the prior art to fashion the surface structure of instrumentation used for the non-destructive invasion of body canals with a very slippery surface to facilitate ingress of the instrumentation into the body canal. The resulting slippery surface also produces low friction during egress of the instrumentation from the body canal.
It has been found that the ingress of the medical device or other instrumentation into a desired body site can be facilitated by the utilization of a surface structure on the device having a bi-directional coefficient of friction with respect to the tissue within the body cavity.or canal that is engaged by the device during ingress. For example, it has been found that naturally occurring peristaltic contractions tend to grasp and carry the device toward the desired work site. This significantly decreases the risk of puncture by the device, as well as reduces the time required by the surgeon for entry and positioning of the device at the desired work site. These advantages are particularly important during procedures such as the insertion of a gastric or jejunal feeding tube through the esophagus and into or through the stomach or small intestine.
Large flaps or barbs have been used on the outside surface of catheters and related devices for the purpose of stabilizing or anchoring the device within the body canal. These flaps or barbs are designed to prevent both ingress and egress of the device once the device has been positioned at the desired location within the body canal. These flaps or barbs are typically rigid, and are attached to the outside of the device in a hinged manner. However, these devices can be very traumatic to the tissue of the body canal, and can be very uncomfortable to the patient, when manipulated within the body or upon egress from the body canal.
In view of the above, there is a need for a medical device or other instrumentation having a series of flaps that function in a bi-directional manner to engage the tissue of the body canal so as to assist with ingress of the device, but which will permit egress of the device without causing trauma or discomfort to the patient.
BRIEF SUMMARY OF THE INVENTION
The foregoing problems are solved and a technical advance is achieved in a medical device, such as a gastrointestinal catheter, for use in delivering fluid-like materials to the gastrointestinal tract. Such fluid-like materials could include feeding materials, drugs, contrast materials or saline.
The invention resides at least in a medical device having the following features. The medical device is controllable from outside a subject's body for dynamic movement into a body canal toward an interior body work site and removal therefrom. The device has an elongate member having a plurality of distal flaps -2a-disposed on a surface of the elongate member near a distal tip thereof. The distal flaps project outwardly from the surface of the elongate member to form a first circumference. The distal flaps are configured so as to promote ingress of the device in response to the peristaltic contractions. The distal flaps are sufficiently flexible to minimize trauma to the interior surface of the body canal during egress of the device. The device further has a plurality of secondary flaps disposed on the surface of the elongate member. The secondary flaps project outwardly from the surface of the elongate member to form a second circumference wherein the first circumference is larger than the second circumference. The secondary flaps are configured so as to promote ingress of the device in response to the peristaltic contractions, and are sufficiently flexible to minimize trauma to the interior surface of the body canal during egress of the device.
The illustrative embodiment of the present invention is directed to a nasal-jejunal feeding tube having an arrangement of flaps cut from the outer surface of the catheter and configured so as to not readily adhere to the catheter outer surface.
The arrangement of flaps are also configured so as to resist egress to the degree that allows the body to propel the device forward, yet will allow the device to be removed from the body without the flaps causing significant trauma, such as inflammation, to the tissues of the body canal, and thereby minimizing or eliminating patient discomfort.
The preferred embodiment illustrated herein comprises a 14 FR nasal-jejunal feeding tube having a minimum overall length of 154 cm. A series of flaps are formed on the outer surface of the distal 50 cm of the catheter portion. Four longer flaps are formed near the distal end of the feeding tube, and are arranged about the perimeter of the feeding tube at approximately equal intervals (i.e., at 900 intervals with respect to each other). A number of shorter flaps are distributed along the length of the feeding tube inwardly or proximally from the four longer flaps. These shorter flaps alternate along opposite sides of the feeding tube at approximately 2 cm intervals for the distal 50 cm of the catheter. The feeding tube also includes several apertures distributed along the distal portion of the catheter. These feeding tube apertures alternate along opposite sides of the feeding tube at approximately 2 cm intervals, and are generally disposed at 90 intervals with respect to the shorter flaps.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a side view of an illustrative embodiment of a body canal intrusion instrument in accordance with the teachings of this invention. In particular, FIG. 1 is a side view of the distal portion of a nasal-jejunal feeding tube made in accordance with the teachings of this invention.
DETAILED DESCRIPTION OF THE INVENTION
The present invention is directed to a medical device 100, such as a gastrointestinal catheter, for use in delivering fluid-like materials to the gastrointestinal tract. Such fluid-like materials could include feeding materials, drugs, contrast materials or saline. In particular, an illustrative embodiment of the present invention is shown in FIG. 1, which depicts the distal portion of a nasal-jejunal feeding tube having a plurality of bi-directional surface elements 102 distributed along the outer surface 104 of the catheter portion 106 of the device 100.
In the illustrative embodiment shown, a group of four (4) distal flaps 108 are disposed about the perimeter of the catheter outer surface 104 at approximately equal intervals (i.e., at 900 intervals). The distal flaps 108 are positioned near the distal tip 110 of the device 100. In the preferred embodiment, the distal flaps 108 comprise a first oppositely disposed pair of distal flaps 112 located approximately 0.7 cm from the distal tip 110 of the feeding tube 100, and a second oppositely disposed pair of distal flaps 114 located approximately 1.0 cm from the distal tip 110 of the device 100, as measured from the base 116 of each of the flaps 112, 114.
In the preferred embodiment shown, each of the distal flaps 108 are approximately 1.0 cm in length, when straightened. The distal flaps 108 are preferably formed by cutting a portion of the catheter outer surface 104. In addition, each of the distal flaps 108 are curved (or curled) so as to prevent the flaps 108 from adhering to the outer surface 104 of the catheter, and so as to orient the tips 120 of the distal flaps 108 forwardly (i.e., towards the distal tip 110 of the device 100). Preferably, each of the distal flaps 108 is curved by utilizing a cutting technique that results in the formation of a distal flap 108 that tends to curve outwardly from the outer surface 104 of the catheter.
Depending on the type of material from which the catheter is manufactured, curving of the distal flaps 108 may also be accomplished by heat curving.
The configuration and orientation of the distal flaps 108 resist egress of the device 100, and also causes the device to be propelled forwardly by naturally occurring peristaltic contractions of the tissue of the body canal (not shown). In particular, when the device 100 is being inserted into the body canal, the distal flaps 108 provide a relatively large diameter near the distal tip 110 of the device 100 that can be readily grasped by the tissue of the body canal during peristaltic contractions. However, when the device 100 is being removed from the body canal, the forward orientation of the tips 120 prevent trauma to the tissue. In addition, the distal flaps 108 are sufficiently flexible to prevent trauma to the tissue of the body canal upon either ingress or egress of the device 100.
A plurality of secondary flaps 118 are disposed along the outer surface 104 of the catheter inwardly (or proximal) from the distal tip 110 and the distal flaps 108. In the preferred embodiment shown, the secondary flaps 118 are distributed along the distal 50 cm of the catheter portion 106 of the feeding tube. The secondary flaps 118 alternate along opposite sides of the feeding tube at approximately 2 cm intervals. In other words, the secondary flaps 118 comprise a first series of secondary flaps 126 disposed along the top side of the feeding tube (as viewed in FIG. 1) and spaced at approximately 4 cm intervals, and a second series of secondary flaps 128 disposed along the bottom side of the feeding tube (as viewed in FIG. 1) and spaced there between.
Although not shown in the drawing of the illustrative embodiment, it should be appreciated that the secondary flaps 118 can be arranged in numerous other configurations. For example, the secondary flaps 118 can be disposed along the catheter portion 106 of the feeding tube in a spiral or random configuration. The secondary flaps 118 can also be disposed along more than two sides of the catheter portion 106. It is also not necessary for the secondary flaps 118 to be disposed in an alternating fashion along opposite sides of the catheter portion 106.
In the preferred embodiment, each of the secondary flaps 118 measures approximately 0.5 cm in length, when straightened. Each of the secondary flaps 118 has a truncate shape comprising a base 122 measuring approximately 0.016 cm in width, and a tip 124 measuring approximately 0.0 10 cm in width. The secondary flaps 118 are preferably formed by cutting a portion of the catheter outer surface 104.
In addition, each of the secondary flaps 118 are moderately curved outwardly so as to prevent the secondary flaps 118 from adhering to the outer surface 104 of the catheter, and to allow the tip 124 to engage the tissue of the body canal (not shown). Preferably, each of the secondary flaps 118 is curved by utilizing a cutting technique that results in the formation of a secondary flap 118 that tends to curve outwardly from the outer surface 104 of the catheter. Depending on the type of material from which the catheter is manufactured, curving of the secondary flaps 118 may also be accomplished by heat curving.
The secondary flaps 118 are also configured so as to orient the tips 124 of the secondary flaps 118 rearwardly (i.e., away from the distal tip 110 of the device 100). This rearward orientation of the secondary flaps 118 resist egress of the device 100, and causes the device to be propelled forwardly by naturally occurring peristaltic contractions of the tissue of the body canal during the insertion process. In addition, the relatively low profile of the secondary flaps 118 minimizes trauma to the tissue during the removal process. The secondary flaps 118 are also sufficiently flexible to prevent trauma to the tissue of the body canal upon either ingress or egress of the device 100.
The feeding tube further comprises feeding tube apertures 130 disposed along the distal portion of the catheter. The feeding tube apertures measure approximately 0.5 cm in diameter, and provide openings through which feeding material can exit the interior of the feeding tube and enter the body canal or cavity. In the embodiment shown, the feeding tube apertures 130 are alternately disposed along opposite sides of the feeding tube at approximately 2 cm intervals, and are preferably located on the sides of the feeding tube that are 90 offset from the sides of the feeding tube along which the secondary flaps 118 are located (i.e., along the front and back sides of the feeding tube as viewed in FIG. 1). The illustrative embodiment comprises a total of five (5) feeding tube apertures 130.
The above described arrangement and dimensions provided for elements thereof are merely exemplary. Any other undisclosed or incidental details of the construction or composition of the various elements of the disclosed embodiments of the present invention are not considered to be critical to the achievement of the advantages of the present invention, so long as the elements possess the attributes required to perform as disclosed herein. The selection of these and other details of construction are believed to be well within the ability of one of ordinary skill in the relevant art in view of the present disclosure. Illustrative embodiments of the present invention have been described in detail for the purpose of disclosing practical, operative structures whereby the invention may be practiced advantageously. The designs described herein are intended to be exemplary only. The novel characteristics of the invention may be incorporated in other structural forms without departing from the spirit and scope of the invention.
BODY CANAL INTRUSION INSTRUMENTATION HAVING
BIDIRECTIONAL COEFFICIENT OF SURFACE FRICTION
WITH BODY TISSUE
TECHNICAL FIELD OF THE INVENTION
This invention relates to instrumentation foriinvading body canals non-destructively and with a minimum of trauma, and more particularly, to the interface between the instruments and body tissue during dynamic ingress and egress of surgical instrumentation into the canals.
BACKGROUND OF THE INVENTION
It has been the direction of the prior art to fashion the surface structure of instrumentation used for the non-destructive invasion of body canals with a very slippery surface to facilitate ingress of the instrumentation into the body canal. The resulting slippery surface also produces low friction during egress of the instrumentation from the body canal.
It has been found that the ingress of the medical device or other instrumentation into a desired body site can be facilitated by the utilization of a surface structure on the device having a bi-directional coefficient of friction with respect to the tissue within the body cavity.or canal that is engaged by the device during ingress. For example, it has been found that naturally occurring peristaltic contractions tend to grasp and carry the device toward the desired work site. This significantly decreases the risk of puncture by the device, as well as reduces the time required by the surgeon for entry and positioning of the device at the desired work site. These advantages are particularly important during procedures such as the insertion of a gastric or jejunal feeding tube through the esophagus and into or through the stomach or small intestine.
Large flaps or barbs have been used on the outside surface of catheters and related devices for the purpose of stabilizing or anchoring the device within the body canal. These flaps or barbs are designed to prevent both ingress and egress of the device once the device has been positioned at the desired location within the body canal. These flaps or barbs are typically rigid, and are attached to the outside of the device in a hinged manner. However, these devices can be very traumatic to the tissue of the body canal, and can be very uncomfortable to the patient, when manipulated within the body or upon egress from the body canal.
In view of the above, there is a need for a medical device or other instrumentation having a series of flaps that function in a bi-directional manner to engage the tissue of the body canal so as to assist with ingress of the device, but which will permit egress of the device without causing trauma or discomfort to the patient.
BRIEF SUMMARY OF THE INVENTION
The foregoing problems are solved and a technical advance is achieved in a medical device, such as a gastrointestinal catheter, for use in delivering fluid-like materials to the gastrointestinal tract. Such fluid-like materials could include feeding materials, drugs, contrast materials or saline.
The invention resides at least in a medical device having the following features. The medical device is controllable from outside a subject's body for dynamic movement into a body canal toward an interior body work site and removal therefrom. The device has an elongate member having a plurality of distal flaps -2a-disposed on a surface of the elongate member near a distal tip thereof. The distal flaps project outwardly from the surface of the elongate member to form a first circumference. The distal flaps are configured so as to promote ingress of the device in response to the peristaltic contractions. The distal flaps are sufficiently flexible to minimize trauma to the interior surface of the body canal during egress of the device. The device further has a plurality of secondary flaps disposed on the surface of the elongate member. The secondary flaps project outwardly from the surface of the elongate member to form a second circumference wherein the first circumference is larger than the second circumference. The secondary flaps are configured so as to promote ingress of the device in response to the peristaltic contractions, and are sufficiently flexible to minimize trauma to the interior surface of the body canal during egress of the device.
The illustrative embodiment of the present invention is directed to a nasal-jejunal feeding tube having an arrangement of flaps cut from the outer surface of the catheter and configured so as to not readily adhere to the catheter outer surface.
The arrangement of flaps are also configured so as to resist egress to the degree that allows the body to propel the device forward, yet will allow the device to be removed from the body without the flaps causing significant trauma, such as inflammation, to the tissues of the body canal, and thereby minimizing or eliminating patient discomfort.
The preferred embodiment illustrated herein comprises a 14 FR nasal-jejunal feeding tube having a minimum overall length of 154 cm. A series of flaps are formed on the outer surface of the distal 50 cm of the catheter portion. Four longer flaps are formed near the distal end of the feeding tube, and are arranged about the perimeter of the feeding tube at approximately equal intervals (i.e., at 900 intervals with respect to each other). A number of shorter flaps are distributed along the length of the feeding tube inwardly or proximally from the four longer flaps. These shorter flaps alternate along opposite sides of the feeding tube at approximately 2 cm intervals for the distal 50 cm of the catheter. The feeding tube also includes several apertures distributed along the distal portion of the catheter. These feeding tube apertures alternate along opposite sides of the feeding tube at approximately 2 cm intervals, and are generally disposed at 90 intervals with respect to the shorter flaps.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a side view of an illustrative embodiment of a body canal intrusion instrument in accordance with the teachings of this invention. In particular, FIG. 1 is a side view of the distal portion of a nasal-jejunal feeding tube made in accordance with the teachings of this invention.
DETAILED DESCRIPTION OF THE INVENTION
The present invention is directed to a medical device 100, such as a gastrointestinal catheter, for use in delivering fluid-like materials to the gastrointestinal tract. Such fluid-like materials could include feeding materials, drugs, contrast materials or saline. In particular, an illustrative embodiment of the present invention is shown in FIG. 1, which depicts the distal portion of a nasal-jejunal feeding tube having a plurality of bi-directional surface elements 102 distributed along the outer surface 104 of the catheter portion 106 of the device 100.
In the illustrative embodiment shown, a group of four (4) distal flaps 108 are disposed about the perimeter of the catheter outer surface 104 at approximately equal intervals (i.e., at 900 intervals). The distal flaps 108 are positioned near the distal tip 110 of the device 100. In the preferred embodiment, the distal flaps 108 comprise a first oppositely disposed pair of distal flaps 112 located approximately 0.7 cm from the distal tip 110 of the feeding tube 100, and a second oppositely disposed pair of distal flaps 114 located approximately 1.0 cm from the distal tip 110 of the device 100, as measured from the base 116 of each of the flaps 112, 114.
In the preferred embodiment shown, each of the distal flaps 108 are approximately 1.0 cm in length, when straightened. The distal flaps 108 are preferably formed by cutting a portion of the catheter outer surface 104. In addition, each of the distal flaps 108 are curved (or curled) so as to prevent the flaps 108 from adhering to the outer surface 104 of the catheter, and so as to orient the tips 120 of the distal flaps 108 forwardly (i.e., towards the distal tip 110 of the device 100). Preferably, each of the distal flaps 108 is curved by utilizing a cutting technique that results in the formation of a distal flap 108 that tends to curve outwardly from the outer surface 104 of the catheter.
Depending on the type of material from which the catheter is manufactured, curving of the distal flaps 108 may also be accomplished by heat curving.
The configuration and orientation of the distal flaps 108 resist egress of the device 100, and also causes the device to be propelled forwardly by naturally occurring peristaltic contractions of the tissue of the body canal (not shown). In particular, when the device 100 is being inserted into the body canal, the distal flaps 108 provide a relatively large diameter near the distal tip 110 of the device 100 that can be readily grasped by the tissue of the body canal during peristaltic contractions. However, when the device 100 is being removed from the body canal, the forward orientation of the tips 120 prevent trauma to the tissue. In addition, the distal flaps 108 are sufficiently flexible to prevent trauma to the tissue of the body canal upon either ingress or egress of the device 100.
A plurality of secondary flaps 118 are disposed along the outer surface 104 of the catheter inwardly (or proximal) from the distal tip 110 and the distal flaps 108. In the preferred embodiment shown, the secondary flaps 118 are distributed along the distal 50 cm of the catheter portion 106 of the feeding tube. The secondary flaps 118 alternate along opposite sides of the feeding tube at approximately 2 cm intervals. In other words, the secondary flaps 118 comprise a first series of secondary flaps 126 disposed along the top side of the feeding tube (as viewed in FIG. 1) and spaced at approximately 4 cm intervals, and a second series of secondary flaps 128 disposed along the bottom side of the feeding tube (as viewed in FIG. 1) and spaced there between.
Although not shown in the drawing of the illustrative embodiment, it should be appreciated that the secondary flaps 118 can be arranged in numerous other configurations. For example, the secondary flaps 118 can be disposed along the catheter portion 106 of the feeding tube in a spiral or random configuration. The secondary flaps 118 can also be disposed along more than two sides of the catheter portion 106. It is also not necessary for the secondary flaps 118 to be disposed in an alternating fashion along opposite sides of the catheter portion 106.
In the preferred embodiment, each of the secondary flaps 118 measures approximately 0.5 cm in length, when straightened. Each of the secondary flaps 118 has a truncate shape comprising a base 122 measuring approximately 0.016 cm in width, and a tip 124 measuring approximately 0.0 10 cm in width. The secondary flaps 118 are preferably formed by cutting a portion of the catheter outer surface 104.
In addition, each of the secondary flaps 118 are moderately curved outwardly so as to prevent the secondary flaps 118 from adhering to the outer surface 104 of the catheter, and to allow the tip 124 to engage the tissue of the body canal (not shown). Preferably, each of the secondary flaps 118 is curved by utilizing a cutting technique that results in the formation of a secondary flap 118 that tends to curve outwardly from the outer surface 104 of the catheter. Depending on the type of material from which the catheter is manufactured, curving of the secondary flaps 118 may also be accomplished by heat curving.
The secondary flaps 118 are also configured so as to orient the tips 124 of the secondary flaps 118 rearwardly (i.e., away from the distal tip 110 of the device 100). This rearward orientation of the secondary flaps 118 resist egress of the device 100, and causes the device to be propelled forwardly by naturally occurring peristaltic contractions of the tissue of the body canal during the insertion process. In addition, the relatively low profile of the secondary flaps 118 minimizes trauma to the tissue during the removal process. The secondary flaps 118 are also sufficiently flexible to prevent trauma to the tissue of the body canal upon either ingress or egress of the device 100.
The feeding tube further comprises feeding tube apertures 130 disposed along the distal portion of the catheter. The feeding tube apertures measure approximately 0.5 cm in diameter, and provide openings through which feeding material can exit the interior of the feeding tube and enter the body canal or cavity. In the embodiment shown, the feeding tube apertures 130 are alternately disposed along opposite sides of the feeding tube at approximately 2 cm intervals, and are preferably located on the sides of the feeding tube that are 90 offset from the sides of the feeding tube along which the secondary flaps 118 are located (i.e., along the front and back sides of the feeding tube as viewed in FIG. 1). The illustrative embodiment comprises a total of five (5) feeding tube apertures 130.
The above described arrangement and dimensions provided for elements thereof are merely exemplary. Any other undisclosed or incidental details of the construction or composition of the various elements of the disclosed embodiments of the present invention are not considered to be critical to the achievement of the advantages of the present invention, so long as the elements possess the attributes required to perform as disclosed herein. The selection of these and other details of construction are believed to be well within the ability of one of ordinary skill in the relevant art in view of the present disclosure. Illustrative embodiments of the present invention have been described in detail for the purpose of disclosing practical, operative structures whereby the invention may be practiced advantageously. The designs described herein are intended to be exemplary only. The novel characteristics of the invention may be incorporated in other structural forms without departing from the spirit and scope of the invention.
Claims (13)
1. A medical device controllable from outside a subject's body for dynamic movement into a body canal toward an interior body work site and removal therefrom, the device comprising an elongate member having a plurality of distal flaps disposed on a surface of the elongate member near a distal tip thereof, said distal flaps projecting outwardly from the surface of the elongate member to form a first circumference, said distal flaps being configured so as to promote ingress of said device in response to said peristaltic contractions, said distal flaps being sufficiently flexible to minimize trauma to the interior surface of the body canal during egress of the device, said device further comprising a plurality of secondary flaps disposed on the surface of the elongate member, said secondary flaps projecting outwardly from the surface of the elongate member to form a second circumference, wherein the first circumference is larger than the second circumference, said secondary flaps being configured so as to promote ingress of said device in response to said peristaltic contractions, and being sufficiently flexible to minimize trauma to the interior surface of the body canal during egress of the device.
2. The medical device according to claim 1 wherein said distal flaps and said secondary flaps comprise tips that are generally oriented in opposite directions.
3. The medical device according to claim 2 wherein said distal flaps and said secondary flaps are formed from a portion of the surface of said elongate member.
4. The medical device according to claim 3 wherein said distal flaps and said secondary flaps are configured so as to extend outwardly from the surface of said elongate member.
5. The medical device according to claim 4 wherein said distal flaps and said secondary flaps are configured to extend outwardly from the surface of said elongate member by a heat treatment process.
6. The medical device according to claim 1 wherein said distal flaps each comprise a length that is at least twice as long as a length of each of said secondary flaps.
7. The medical device according to claim 1 wherein said distal flaps each extend outwardly from the surface of said elongate member a distance that is at least twice as great as a distance each of said secondary flaps extends outwardly from the surface of said elongate member.
8. The medical device according to claim 1 wherein the plurality of distal flaps are disposed at equal intervals about an outer circumference of the elongate member.
9. The medical device according to claim 8 wherein the plurality of secondary flaps are alternatively disposed along opposite sides of the elongate member.
10. The medical device according to claim 9 further comprising apertures in the surface of the elongate member.
11. The medical device according to claim 1 wherein said elongate member comprises a hollow catheter.
12. The medical device according to claim 1 wherein said elongate member comprises a nasal-jejunal feeding tube.
13. The medical device according to claim 1 wherein the distal flaps comprise a U-shaped structure having a first tip, a second tip, and a base, the first tip being connected to the elongate member, the second tip being oriented in a distal direction, and the base being oriented in a proximal direction.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US29214601P | 2001-05-18 | 2001-05-18 | |
| US60/292,146 | 2001-05-18 | ||
| US10/151,585 | 2002-05-16 | ||
| US10/151,585 US6767339B2 (en) | 1997-12-12 | 2002-05-16 | Body canal intrusion instrumentation having bidirectional coefficient of surface friction with body tissue |
| PCT/US2002/015761 WO2002094362A2 (en) | 2001-05-18 | 2002-05-17 | Body canal intrusion instrumentation having bidirectional coefficient of surface friction with body tissue |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2447582A1 CA2447582A1 (en) | 2002-11-28 |
| CA2447582C true CA2447582C (en) | 2007-10-02 |
Family
ID=26848779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002447582A Expired - Fee Related CA2447582C (en) | 2001-05-18 | 2002-05-17 | Body canal intrusion instrumentation having bidirectional coefficient of surface friction with body tissue |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US6767339B2 (en) |
| EP (1) | EP1387709B1 (en) |
| JP (1) | JP4221226B2 (en) |
| AT (1) | ATE344081T1 (en) |
| AU (1) | AU2002259256B2 (en) |
| CA (1) | CA2447582C (en) |
| DE (1) | DE60215794T2 (en) |
| HK (1) | HK1060313A1 (en) |
| WO (1) | WO2002094362A2 (en) |
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| US7212869B2 (en) * | 2004-02-04 | 2007-05-01 | Medtronic, Inc. | Lead retention means |
| US7933661B2 (en) * | 2004-02-04 | 2011-04-26 | Medtronic, Inc. | Lead retention means |
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| US8052650B2 (en) * | 2007-04-30 | 2011-11-08 | Cook Medical Technologies Llc | Device with removable projections |
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| US8002729B2 (en) * | 2007-08-21 | 2011-08-23 | Cook Medical Technologies Llc | Multi-lumen catheter assembly |
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| US20090318897A1 (en) * | 2008-06-20 | 2009-12-24 | Cook Critical Care Incorporated | Gastrojejunal feeding assembly |
| US8550986B2 (en) * | 2009-09-17 | 2013-10-08 | Fujifilm Corporation | Propellable apparatus with active size changing ability |
| US8496607B2 (en) * | 2009-12-04 | 2013-07-30 | Cook Medical Technologies Llc | Multi-lumen catheter |
| US8473034B2 (en) | 2011-03-04 | 2013-06-25 | Cook Medical Technologies Llc | System and method for feeding tube placement |
| US9987042B2 (en) | 2011-04-07 | 2018-06-05 | Jai Singh | General uterine manipulator and system |
| CN203647441U (en) | 2011-04-07 | 2014-06-18 | 基万·史蒂文·辛格 | Uterine manipulator system |
| US20130197536A1 (en) * | 2011-04-07 | 2013-08-01 | Jai Singh | General uterine manipulator and system |
| US20120277586A1 (en) | 2011-04-26 | 2012-11-01 | Bosel Christopher D | Feeding tube having echogenic tip |
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| BR112015018903B1 (en) * | 2013-02-07 | 2022-01-04 | Endoaid Ltd | DEVICE INCLUDING AN ENDOSCOPIC GLOVE |
| US10299662B2 (en) | 2013-02-07 | 2019-05-28 | Endoaid Ltd. | Endoscopic sleeve |
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-
2002
- 2002-05-16 US US10/151,585 patent/US6767339B2/en not_active Expired - Lifetime
- 2002-05-17 AT AT02729252T patent/ATE344081T1/en not_active IP Right Cessation
- 2002-05-17 AU AU2002259256A patent/AU2002259256B2/en not_active Ceased
- 2002-05-17 JP JP2002591077A patent/JP4221226B2/en not_active Expired - Fee Related
- 2002-05-17 DE DE60215794T patent/DE60215794T2/en not_active Expired - Lifetime
- 2002-05-17 CA CA002447582A patent/CA2447582C/en not_active Expired - Fee Related
- 2002-05-17 WO PCT/US2002/015761 patent/WO2002094362A2/en active IP Right Grant
- 2002-05-17 EP EP02729252A patent/EP1387709B1/en not_active Expired - Lifetime
-
2004
- 2004-05-05 HK HK04103151A patent/HK1060313A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CA2447582A1 (en) | 2002-11-28 |
| WO2002094362A2 (en) | 2002-11-28 |
| AU2002259256B2 (en) | 2006-02-02 |
| ATE344081T1 (en) | 2006-11-15 |
| JP4221226B2 (en) | 2009-02-12 |
| DE60215794T2 (en) | 2007-08-30 |
| EP1387709B1 (en) | 2006-11-02 |
| US20030018307A1 (en) | 2003-01-23 |
| JP2005509459A (en) | 2005-04-14 |
| HK1060313A1 (en) | 2004-08-06 |
| WO2002094362A3 (en) | 2003-01-23 |
| DE60215794D1 (en) | 2006-12-14 |
| EP1387709A2 (en) | 2004-02-11 |
| US6767339B2 (en) | 2004-07-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20170517 |