Endoscopic needle assembly
A needle and suture assembly is provided for use with an endoscopic suturing device with a needle holder arm. The needle assembly includes a needle tip and a needle body. The needle tip has a sharp end, a capture groove, a tab groove and a plug portion positioned between the capture groove and the tab groove. The needle body has first and second ends, tip tabs, retainers for removably retaining the needle body relative to the needle holder arm, and a suture opening. The needle tip is fixed relative to the needle body by plastic deformation of the tip tabs into the tab groove. A suture extends into the suture opening of the needle body and is fixed therein.
1. A needle and suture assembly for use in association with a flexible endoscopic suturing device having a movable needle holder arm, comprising:
a) a needle including,
a needle tip with a sharp end, a longitudinal axis and a circumferential capture groove adjacent said sharp end, said capture groove partially defined by a floor establishing a depth of the capture groove and a wall extending perpendicular to said longitudinal axis, and
a needle body having a first end adjacent said needle tip and a second end opposite said needle tip, said needle body is a straight cylindrically tubular body having a side wall defining a suture opening between said first and second ends, and a retaining structure positioned between said second end and said suture opening, said retaining structure being cut from and extending from said side wall towards the interior of said tubular body; and
b) a suture extending through said suture opening and into said needle body and permanently fixed therein;
and wherein said needle tip includes a tab groove, said needle body includes at least one tip tab defined in said tubular body and plastically deformed toward an interior of said tubular body so as to engage in said tab groove and fix said needle tip at said first end of said needle body.
2. A needle and suture assembly according to claim 1 , wherein:
said sharp end of said needle tip is defined by at least one conical taper.
3. A needle and suture assembly according to claim 1 , wherein:
said suture includes first and second ends, and said first end is contained entirely within said needle body and said second end resides outside said needle body.
4. A needle and suture assembly according to claim 3 , wherein:
said needle body defines a suture retention tab located between said suture opening and said first end, said suture retention tab plastically deformed into an interior of said tubular body to fix said first end of said suture within said needle body.
5. A needle and suture assembly according to claim 1 , wherein:
said retaining structure is defined by at least one tab cut in said tubular body and plastically deformed into an interior of said tubular body.
6. A needle and suture assembly for use in association with a flexible endoscopic suturing device, comprising:
a) a needle including,
a needle tip with a sharp end, a longitudinal axis and a circumferential capture groove adjacent said sharp end, said capture groove defined by a floor establishing a depth of the capture groove, a first wall extending from said floor and perpendicular to said longitudinal axis, and a second wall, and
a needle body having a first end adjacent said needle tip and a second end opposite said needle tip, said needle body is a straight cylindrically tubular body having a central longitudinal axis and a side wall including a suture opening positioned between said first and second ends, said needle body having at least one retaining structure cut from said wall and resiliently biased toward the central longitudinal axis, said retaining structure being positioned between said second end and said suture opening; and
b) a suture extending through said suture opening and into said needle body and fixed therein;
wherein: said needle tip includes a tab groove, said needle body includes at least one tip tab defined in said tubular body and plastically deformed toward an interior of said tubular body so as to engage in said tab groove and fix said needle tip at said first end of said needle body.
7. A needle and suture assembly according to claim 6 , wherein:
said sharp end of said needle tip is defined by at least one conical taper.
8. A needle and suture assembly according to claim 6 , wherein:
said suture includes first and second ends, and said first end is contained entirely within said needle body between said suture opening and first end.
9. A needle and suture assembly according to claim 8 , wherein:
said needle body defines a suture retention tab located between said suture opening and said first end, said suture retention tab plastically deformed into an interior of said tubular body to fix said first end of said suture within said needle body.
10. A needle and suture assembly according to claim 6 , wherein:
said retaining structure is defined by at least one tab cut in said tubular body and plastically deformed into an interior of said tubular body.