Clip cartridge

Patent metadata

Field	Value
Publication number	US-10492794-B2
Application number	US-201716078449-A
Country	US
Kind code	B2
Filing date	Feb 23, 2017
Priority date	Feb 23, 2016
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

According to the present invention, there is provided a clip cartridge in which a clip having a structure enabling a user to easily perform a series of procedures can be easily and reliably mounted on a treatment instrument body. A clip cartridge (200) according to the present invention includes an inner case (30) that has a first accommodation region (32) for accommodating a clip (110), and an outer case (40) that has an elongated insertion hole (43) into which a treatment instrument body (90) is inserted, and a second accommodation region (42) which accommodates the inner case (30) so as to be movable. The treatment instrument body (90) is inserted into the insertion hole (43), and an operation wire is pressed forward so that a distal connection portion and a diameter enlargement portion of the sleeve protrude from the sheath to a distal side and enter the second accommodation region (42), and so that a diameter enlargement portion is elastically enlarged in diameter. The operation wire is further pressed so as to bring a distal connection portion and the clip (110) into a mutually connected state. The operation wire is pulled so that the inner case (30) moves backward relative to the outer case (40) so as to press the sleeve backward, thereby drawing the diameter enlargement portion into the sheath while reducing the diameter enlargement portion in diameter.

First claim

The invention claimed is:

1. A clip cartridge system, comprising:
an elongated treatment instrument body;
a clip comprising a clip body having a plurality of arms and a locking portion positioned on a proximal side of the arms such that the plurality of arms grips a living body; and
a clip cartridge configured to connect the clip to the elongated treatment instrument body and comprising an inner case having a first accommodation region, and an outer case having a second accommodation region and an elongated insertion hole such that the first accommodation region accommodates the clip with the plurality of arms opened, that the elongated treatment instrument body is inserted into the elongated insertion hole, that the second accommodation region communicates with a distal end of the elongated insertion hole, and that the inner case is accommodated in the second accommodation region so as to move between a distal side and a proximal side of the second accommodation region with the plurality of arms opened,
wherein the elongated treatment instrument body has an elongated sheath, an operation wire inserted into the elongated sheath so as to move forward and backward, a distal connection portion disposed in a distally located portion of the operation wire, a cylindrical sleeve accommodated inside the elongated sheath and configured to accommodate the distal connection portion, and a transmission portion which transmits a forward movement force and a backward movement force from the operation wire to the cylindrical sleeve, the cylindrical sleeve has a diameter enlargement portion which is elastically self-openable, and a cylindrical sleeve body disposed on a proximally located side from the diameter enlargement portion and whose radial rigidity is higher than a radial rigidity of the diameter enlargement portion, in a state where the elongated treatment instrument body is inserted into the elongated insertion hole, the operation wire is pressed forward such that the distal connection portion and the diameter enlargement portion of the cylindrical sleeve protrude from the elongated sheath to a distal side and enter a region between the inner case in the second accommodation region and the insertion hole, and that the diameter enlargement portion is elastically enlarged in diameter, when the operation wire is further pressed forward such that the distal connection portion moves forward relative to the cylindrical sleeve, the distal connection portion protrudes from the cylindrical sleeve to the distal side, and the distal connection portion and the locking portion are brought into a mutually connected state, and when the operation wire is pulled to a proximal side in the mutually connected state such that the inner case moves backward relative to the outer case inside the second accommodation region and the inner case presses the cylindrical sleeve backward, the diameter enlargement portion is drawn into the elongated sheath while the diameter enlargement portion is reduced in diameter.

2. The clip cartridge system according to claim 1 , wherein when the operation wire is pulled to the proximal side in the mutually connected state such that the clip is drawn by the distal connection portion, the clip is separated from the inner case and is caused to move backward, and in a case of setting a force F 1 required for separating the clip from the inner case, a force F 2 required for drawing the diameter enlargement portion of the cylindrical sleeve into the elongated sheath from the second accommodation region, and a force F 3 required for moving the inner case backward relative to the outer case in the second accommodation region, a relationship of F 1 >F 2 >F 3 is satisfied.

3. The clip cartridge system according to claim 2 , wherein the clip further includes a clamping ring into which the plurality of arms are collectively inserted, and is configured such that the clamping ring moves to a distal side of the arms relative to the arms and brings distal ends of the plurality of arms into a mutually closed state, the inner case has a ring pinching portion which pinches the clamping ring, the ring pinching portion is configured to be elastically deformed when the operation wire is pulled to the proximal side in the mutually connected state such that the clamping ring is separated from the ring pinching portion, and the force F 1 represents a force required when the clamping ring is separated from the ring pinching portion.

4. The clip cartridge system according to claim 3 , wherein the ring pinching portion has a ring holding recess configured to hold the clamping ring in a fitted state, and an inclined surface adjacent to a proximal side of the ring holding recess and inclined toward the proximal side in a direction where a facing interval of the ring pinching portion is narrowed.

5. The clip cartridge system according to claim 4 , wherein the inner case has an inner case body and the ring pinching portion, the ring pinching portion includes a movable piece supported by the inner case body in a cantilever manner, and when the operation wire is pulled to the proximal side in the mutually connected state, the movable piece is elastically displaced in a direction where a facing interval of the ring pinching portion is widened, and the clamping ring is separated from the inner case.

6. The clip cartridge system according to claim 5 , wherein the movable piece has an outer surface which faces an inner surface of the outer case and which is inclined in a direction away from the inner surface of the outer case toward the proximal side.

7. The clip cartridge system according to claim 3 , wherein the inner case has an inner case body and the ring pinching portion, the ring pinching portion includes a movable piece supported by the inner case body in a cantilever manner, and when the operation wire is pulled to the proximal side in the mutually connected state, the movable piece is elastically displaced in a direction where a facing interval of the ring pinching portion is widened, and the clamping ring is separated from the inner case.

8. The clip cartridge system according to claim 7 , wherein the movable piece has an outer surface which faces an inner surface of the outer case and which is inclined in a direction away from the inner surface of the outer case toward the proximal side.

9. The clip cartridge system according to claim 3 , wherein the inner case has a forward movement restriction portion which selectively restricts forward movement of the cylindrical sleeve.

10. The clip cartridge system according to claim 3 , wherein the inner case comprises a pair of inner case configuration components having the same shape and fitted to each other in a mutually facing state.

11. The clip cartridge system according to claim 3 , wherein the outer case comprises a pair of outer case configuration components having the same shape and fitted to each other in a mutually facing state.

12. The clip cartridge system according to claim 3 , wherein when the operation wire is pulled to the proximal side in the mutually connected state, before the diameter enlargement portion is drawn into the elongated sheath, the locking portion of the clip and the distal connection portion of the elongated treatment instrument body is accommodated inside the cylindrical sleeve body of the cylindrical sleeve.

13. The clip cartridge system according to claim 2 , wherein the inner case has a forward movement restriction portion which selectively restricts forward movement of the cylindrical sleeve.

14. The clip cartridge system according to claim 2 , wherein the inner case comprises a pair of inner case

Assignees

• Sumitomo Bakelite Co

Inventors

• Ikeda Masao
• Hayashi Takuya
• Yamabe Etsuro
• Matsunami Hideaki
• Otsuka Wataru
• Abe Tetsuro

Classifications

• A61B2017/0053

  Loading magazines or sutures into applying tools · CPC title

• A61B17/122 Primary

  Clamps or clips, e.g. for the umbilical cord {(for the vas deferens A61F6/206)} · CPC title

• A61B17/1285

  for minimally invasive surgery · CPC title

• A61B2017/12004

  for haemostasis, for prevention of bleeding · CPC title

• A61B17/1222 Primary

  Packages or dispensers therefor (clip magazines incorporated in a clip-applying instrument A61B17/128; for surgical articles A61B50/30) · CPC title