CN112295082B - Catheter limiting device for pancreaticojejunal stapler and pancreaticojejunal stapler - Google Patents

Abstract

The purpose of the present invention is to provide a catheter limiting device for a pancreatic-intestinal stapler and a pancreatic-intestinal stapler in view of the problem that the operation in the human body is complicated and the operation time is easily prolonged when the existing catheter is fixed to the human body. The catheter limiting device comprises a coaxially arranged fixed ring and a movable ring, and a folding piece connecting the movable ring and the fixed ring. The folding piece is in the shape of a long thin plate arranged along the axial direction of the fixed ring. Folding grooves are respectively arranged at both ends and in the middle of the folding piece. When the movable ring and the fixed ring are close to each other along the axial direction, the folding piece is bent at the folding groove and the middle of the folding piece is bent outward. The catheter limiting device is made of medical absorbable material. The pancreatic-intestinal stapler comprises a catheter and the above-mentioned catheter limiting device. A drainage hole is arranged at one end of the catheter. The fixed ring and the movable ring are sleeved on the catheter. The fixed ring is fixedly connected to the catheter, and the movable ring is not connected to the catheter. The movable ring is located at one end of the catheter limiting device away from the drainage hole. The limiting operation of the catheter using the structure of the present invention is simple and rapid, the operation time can be shortened, and the postoperative removal is very convenient.

Description

Catheter limiting device for pancreatic intestine anastomat and pancreatic intestine anastomat

Technical Field

The invention relates to a medical device, in particular to a catheter limiting device for a pancreatic intestine anastomat and the pancreatic intestine anastomat.

Background

Some operations need to temporarily guide in-vivo liquid out of the body after the operation, a catheter needs to be put into the human body for drainage during the operation, after the operation, the part of the catheter outside the human body needs to be ensured not to enter the human body at will, adverse effects are caused on the human body, and the catheter needs to be removed immediately after the human body is recovered. For example, when pancreatic anastomosis is performed after resection of the head of the pancreas, so that pancreatic juice can flow into the small intestine again, the operation needs to reconstruct the pancreatic anastomosis, because pancreatic juice is corrosive, when the pancreatic anastomosis is not healed, the pancreatic anastomosis is contacted with the pancreatic juice to prolong the healing time, and the fistula or edema is formed to cause difficult healing of the anastomosis, therefore, before the pancreatic anastomosis is healed, the pancreatic juice is preferably led out of the body, and a catheter can be used to pass through the small intestine and the abdominal wall, the pancreatic duct is communicated with the outside of the body, pancreatic juice is led out of the body before the pancreatic anastomosis is healed, so that the catheter and the human body are required to keep a stable position relation, the catheter can be sutured on the abdominal wall or fixed with human tissues in the operation process by utilizing the self structure of the anastomat, but when the structure is installed, the operation in the human body is complex, the operation time is easy to prolong, and the catheter is difficult to remove after the pancreatic anastomosis is healed.

Disclosure of Invention

The invention aims to solve the problems that the conventional catheter is complex to operate in a human body and the operation time is easy to prolong when the conventional catheter is fixed with the human body, and provides a catheter limiting device for a pancreatic intestinal anastomat and the pancreatic intestinal anastomat.

The technical aim of the invention is realized by the following technical scheme:

the utility model provides a pancreas intestinal anastomat is with pipe stop device, includes fixed ring, moving ring and rolls over the piece, roll over the piece and be rectangular shape and set up along fixed ring axial, roll over the both ends of piece and connect moving ring and fixed ring respectively, fixed ring and moving ring coaxial arrangement, roll over the piece and be the sheet, roll over the face of piece and just to the axis of fixed ring, roll over the both ends and the centre of piece and be provided with respectively and roll over the groove, when moving ring and fixed ring are close to along the axial, roll over the piece and roll over the middle department of piece and to the direction bending away from fixed ring axis in roll over the groove department bending, the pipe stop device is made for medical absorbable material.

Preferably, the folding piece is provided with a plurality of circumferential distribution which takes the axis of the fixed ring as the center.

Preferably, the material at the position where the folding groove is arranged on the folding piece is the thinnest position of the material in the catheter limiting device.

Preferably, the fold groove is located on the outwardly facing surface of the fold.

Preferably, the folding groove is arranged along the plate surface and is in a strip shape, and the length direction of the folding groove is perpendicular to the length direction of the folding piece.

Preferably, the cross section of the folding groove is in an inward concave circular arc shape.

Preferably, the outer diameter of the fixed ring is equal to the outer diameter of the movable ring, and the outward plate surface of the folded piece and the outer surface of the fixed ring are on the same circumferential surface.

Preferably, one end of the fixed ring, which is back to the movable ring, is provided with a conical structure.

Preferably, the outer circumferential surface of the conical structure is provided with anti-rotation grooves, the anti-rotation grooves are arranged along the direction of a generatrix of the outer circumferential surface of the conical structure, and the anti-rotation grooves are provided with a plurality of anti-rotation grooves and are uniformly distributed on the outer circumference of the conical structure.

The pancreatic intestine anastomat comprises a catheter, wherein a drainage hole is formed in the wall of one end of the catheter, the pancreatic intestine anastomat further comprises the catheter limiting device, the fixed ring and the movable ring are sleeved on the catheter, the fixed ring is fixedly connected with the catheter, the movable ring is not connected with the catheter, and the movable ring is located at one end, far away from the drainage hole, of the catheter limiting device.

The invention has the following beneficial effects:

the catheter limiting device comprises a fixed ring, a movable ring and a folding piece connecting the movable ring and the fixed ring, wherein the fixed ring is sleeved on the catheter and fixed with the catheter during application, the movable ring is sleeved on the catheter and can axially move along the catheter, the folding piece is long-strip-shaped and axially arranged along the fixed ring, and folding grooves are respectively formed in the two ends and the middle of the folding piece. The catheter limiting device enters the cavity of the human body along with the catheter in a forward advancing posture of the fixed ring, when the catheter limiting device is used for a pancreatic intestine anastomat, the small intestine is entered, at the moment, the catheter is pulled outwards, the tail end of the movable ring is blocked by the intestinal wall, so that the movable ring is close to the fixed ring, the folded part is folded at the folded groove, the middle part of the folded part is folded in the direction away from the axis of the fixed ring, the catheter limiting device is expanded in the radial direction, and the catheter limiting device cannot pass through an entering wound, so that the catheter is limited to move outwards continuously, the installation of the catheter limiting device and the limiting of the catheter can be realized only by pulling the catheter limiting device after the catheter limiting device enters the human body, the operation is simple, convenient and rapid, the operation action in the human body in an operation can be greatly reduced, and the operation time is shortened. The catheter limiting device is made of medical absorbable materials, the absorbable materials are gradually absorbed by a human body after an operation, the catheter limiting device material disappears after a period of time to cause limiting failure, and the catheter can be removed by pulling the catheter outwards at the moment, so that the operation is very convenient.

Drawings

FIG. 1 is a schematic view of a catheter stop device for a pancreatic intestinal stapler according to an embodiment of the present invention, wherein the catheter stop device is in an initial state;

FIG. 2 is a schematic view of a catheter stop device for a pancreatic intestinal stapler according to an embodiment of the present invention, wherein the catheter stop device is in a stop state;

FIG. 3 is a schematic view of the structure of an embodiment of the pancreatic anastomat of the present invention;

FIG. 4 is a schematic structural view of a winding fixture in an embodiment;

fig. 5 is a schematic view of the position of the pancreatic anastomat with the human organ when in use.

Reference numerals indicate 10, a catheter, 11, an pancreatic region, 12, an intestinal region, 13, an external region, 14, a drainage hole, 20, a winding fixing device, 21, a fixing sleeve, 22, a winding ear, 30, a catheter limiting device, 31, a fixing ring, 32, a moving ring, 33, a folding piece, 34, a folding groove, 35, an anti-rotation groove, 40, an external fixing device, 50, pancreas, 60, small intestine, 70 and an abdominal wall.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. Wherein like parts are designated by like reference numerals.

The catheter limiting device 30 is shown in combination with fig. 1 and 2, and comprises a fixed ring 31, a movable ring 32 and a folding piece 33, wherein the fixed ring 31 and the movable ring 32 are coaxially arranged, the folding piece 33 is long-strip-shaped and is axially arranged along the fixed ring, the folding piece 33 is arranged between the fixed ring 31 and the movable ring 32, and two ends of the folding piece 33 are respectively connected with the fixed ring 31 and the movable ring 32. The two ends and the middle of the folding piece 33 are respectively provided with a folding groove 34, and when the movable ring 32 and the fixed ring 31 axially move to be close to each other, the folding piece 33 can be folded outwards along the radial direction of the fixed ring at the folding grooves 34. The fixed ring 31 of the catheter limiting device 30 is sleeved on the catheter 10 and fixed with the catheter 10 in use, the movable ring 32 is sleeved on the catheter 10 and can axially move along the catheter 10, and one end of the fixed ring 31 firstly enters the human body in use. After the catheter limiting device 30 enters the human body in the initial state that the folded piece 33 is straightened, the catheter 10 is pulled outwards, one end of the movable ring 32, which is far away from the fixed ring 31, is firstly hindered by human tissues, the catheter is pulled continuously, the fixed ring 31 and the movable ring 32 are mutually closed, the folded piece is naturally folded and expanded in the axial direction, and the limited state is entered, so that the catheter limiting device 30 in the limited state cannot pass through an opening in the human body for the catheter limiting device 30 in the initial state to enter, further, the catheter 10 is limited to move outwards, and therefore, only the catheter with the catheter limiting device 30 is needed to be inserted into the human body, the catheter limiting device 30 is pulled outwards after all the catheter limiting device 30 enters the human body, the installation and limitation of the catheter limiting device 30 can be realized, the operation is simple, the operation in the human body can be greatly reduced, and the operation time is shortened. The catheter limiting device 30 is made of medical absorbable materials such as polylactic acid, polyvinyl alcohol, polydioxanone and the like, the absorbable materials are gradually absorbed by a human body after an operation, limiting is invalid, and the catheter can be removed by directly pulling out the catheter. Preferably, the position of the folding groove 34 is set to be the thinnest position of the material of the catheter limiting device, the material of the folding groove 34 can be preferentially absorbed, the folding piece 33 is separated from the fixed ring and the movable ring, the folded folding piece 33 is lost to be blocked, the catheter limiting device can also enter a failure state, the catheter 10 is pulled outwards, the fixed ring 31 moves along with the catheter 10 and pushes the movable ring 32 to penetrate through a human body after contacting the movable ring 32, compared with the time required by the complete absorption of the whole catheter limiting device, the absorption rate of the material of the folding groove 34 is easier to control, and for a designer, the thinnest structure of the material of the folding groove 34 is more convenient for designing the sizes of the folding piece 33 and the folding groove 34 according to the recovery rate of the human body, so that the catheter limiting device fails at a required time point.

Preferably, the folding member 33 is provided with a strip-shaped thin plate, the plate surface of the folding member 33 is opposite to the axis of the fixed ring, the folding groove 34 is provided along the plate surface and is in a strip shape, and the length direction of the folding groove 34 is perpendicular to the length direction of the folding member 33, so that the folding member 33 is more convenient to bend. The plurality of folding members 33 are preferably arranged, and the folding members 33 are uniformly circumferentially distributed by taking the axis of the fixed ring 31 as the center, so that the radial dimension of the catheter limiting device 30 can be increased relatively uniformly after each folding member 33 is bent, and the limiting effect and the stability of the catheter limiting device 30 can be improved. Preferably, the folding groove 34 is provided on the outwardly facing surface of the folding member 33, which facilitates the processing of the folding groove 34. The cross section of the folding groove 34 can be set to be any shape, but is preferably in an inward concave circular arc shape, so that the folding groove 34 is convenient to process, and the possibility of the folding piece 33 being directly broken at the folding groove 34 when being folded can be reduced. Preferably, the fixed ring and the movable ring are coaxial and have equal outer diameters, and the outward plate surface of the folded piece 33 and the outer circumferential surfaces of the fixed ring and the movable ring are on the same circumferential surface, so that the resistance when the catheter limiting device enters a human body is small.

Preferably, the end of the stator ring 31 facing away from the ring 32 is provided with a conical formation, the conical portion of the stator ring 31 facilitating penetration into the wounds of the intestinal wall and abdominal wall when installed. Preferably, a plurality of anti-rotation grooves 35 are formed on the outer circumferential surface of the conical structure, the anti-rotation grooves 35 are uniformly distributed on the outer circumferential surface of the conical structure, the anti-rotation grooves 35 are long-strip-shaped and are arranged along the direction of a generatrix of the outer circumferential surface of the conical structure, and the anti-rotation grooves 35 can increase friction force between the movable ring 32 and human tissues when the movable ring 31 rotates, so that the possibility of rotation of the catheter limiting device 30 is reduced, and the possibility of rotation of the whole anastomat to drive the pancreatic intestinal anastomosis opening is further reduced.

The outer surfaces of the fixed ring 31 and the movable ring 32 can be provided with absorption grooves, the absorption grooves can accelerate the absorption of materials, and the external dimensions of the fixed ring 31 and the movable ring 32 can be reduced when the pancreatic anastomosis is closed, so that the resistance when the anastomat is disassembled is reduced, the absorption grooves can be square, round, annular and the like, as long as the materials can be removed, the anti-rotation grooves 35 can also be used as the absorption grooves on the fixed ring 31, and the absorption grooves on the movable ring 32 are not shown in the drawing.

The catheter stopper 30 of the present invention may be incorporated into a variety of surgical instruments that require placement of a catheter 10 for drainage and that require restriction of movement of the catheter 10 into the interior of the body, such as for use in a pancreatic stapling instrument. As shown in fig. 3, the pancreatic anastomat comprises a catheter 10 for guiding out pancreatic juice and the catheter limiting device 30. The catheter 10 is an elongated tube, and the catheter 10 is sequentially divided into an pancreatic inner region 11, an intestinal inner region 12 and an external region 13 along the length direction thereof, wherein the external region 13 is mainly located outside a human body when in use, the intestinal inner region 12 is located in the small intestine 60, and the pancreatic inner region 11 is located in the pancreatic tube. The pipe wall of the pancreatic inner region 11 of the catheter is provided with a drainage hole 14 which is communicated with the inside and the outside of the pipe of the catheter 10. The catheter stop device 30 is disposed at the junction of the enteral zone 12 and the extracorporeal zone 13, wherein the fixation ring 31 is located at one end near the pancreatic zone 11.

As shown in fig. 5, in use, the catheter 10 of the outer region 13 is fixed by the detachable outer fixing device 40 arranged outside the body in cooperation with the catheter limiting device 30, so as to prevent the catheter 10 of the outer region 13 from entering the human body. The external fixing device 40 may be a common medical adhesive tape, and the catheter 10 is adhered to the external skin by the adhesive tape, or the external fixing device 40 may be a special catheter 10 fixing device, for example, a catheter 10 fixing device disclosed in chinese patent No. 201721806118.9 or an external pancreatic duct drainage fixing device disclosed in chinese patent No. 201820952118.8, so long as the catheter 10 in the external region 13 can be stably fixed in vitro.

When the pancreatic intestinal anastomat is used, the anastomat is firstly penetrated into a human body, the catheter 10 passes through the abdominal wall 70 and penetrates through the small intestine 60 to enter the pancreatic duct, the pancreatic inner region 11 enters the pancreatic duct, the intestinal inner region 12 and the unexpanded catheter limiting device 30 all enter the small intestine 60, the catheter limiting device 30 is in an initial state during penetration, then the pancreas section, the pancreas duct fracture and the intestinal wall are sutured, the catheter 10 is pulled outwards after suturing, the fixed ring 31 moves along with the fixed ring to be close to the movable ring 32 which is propped against the intestinal wall, in the process, the folded piece 33 bends outwards to enable the catheter limiting device 30 to be in a limiting state, the catheter limiting device 30 in the limiting state cannot pass through wounds on the intestinal wall and the abdominal wall, and the catheter 10 is fixed from outside the body by the external fixing device 40, so that the installation of the pancreatic intestinal anastomat is completed.

In the process of healing the pancreatic anastomosis, the material of the catheter limiting device 30 is gradually absorbed by a human body, the material at the folding groove 34 is preferentially absorbed after the pancreatic anastomosis heals, the folding piece 33 falls off, at the moment, the catheter 10 is pulled outwards, and the movable ring 32, the fixed ring 31 and the fixed sleeve 21 on the catheter 10 can sequentially pass through the openings on the small intestine 60 and the abdominal wall 70, so that the anastomat is removed.

In order to improve the stability of the catheter in the pancreas, a fixing device for fixing the relative position of the pancreatic anastomosis opening and the catheter 10 can be further arranged on the pancreatic anastomosis device, and the fixing device can be of any structure as long as the relative position of the catheter and the pancreatic anastomosis opening can be fixed. For example, there may be a wire-wound fixing device 20, which includes a fixing sleeve 21 and a wire-wound lug 22, as shown in fig. 4. The inner wall of the fixing sleeve 21 is matched with the outer wall of the catheter 10 and is fixedly sleeved at the junction of the pancreatic inner region 11 and the intestinal inner region 12 of the catheter, and when in use, one end of the fixing sleeve 21 plugs a gap between the pancreatic duct and the catheter to prevent pancreatic juice from flowing out of the gap between the pancreatic duct and the catheter 10. The winding lug 22 is arranged along the central line direction of the tube of the fixed sleeve and is fixedly arranged on the outer circumferential surface of the fixed sleeve 21, wherein one end of the winding lug 22 facing the pancreas inner region 11 is connected with the fixed sleeve 21, and the other end is a free end. When in use, the suture lines of the suture intestinal wall, the pancreas 50 section and the pancreas tube fracture are wound at the root of the winding ear 22, so that the pancreas intestinal anastomosis and the anastomat are relatively fixed, and the anastomat is prevented from falling off before the wound is recovered. The wire fixing device 20 is made of medical absorbable materials, and after a period of time, the materials are absorbed completely, so that the suture wound at the root of the wire winding lug 22 can be separated from the catheter 10, and the subsequent detachment is convenient.

This specific example is merely illustrative of the invention and is not intended to be limiting.

Claims (7)

1. The catheter limiting device for the pancreatic intestinal anastomat is characterized by comprising a fixed ring (31), a movable ring (32) and a folding piece (33), wherein the folding piece (33) is long-strip-shaped and is axially arranged along the fixed ring (31), two ends of the folding piece (33) are respectively connected with the movable ring (32) and the fixed ring (31), the fixed ring (31) and the movable ring (32) are coaxially arranged, the folding piece (33) is in a thin plate shape, the plate surface of the folding piece (33) is opposite to the axis of the fixed ring (31), folding grooves (34) are respectively arranged at two ends and the middle of the folding piece (33), when the movable ring and the fixed ring are axially close, the folding piece (33) is folded at the folding groove (34) and the middle of the folding piece (33) is folded in a direction far away from the axis of the fixed ring, and the catheter limiting device is made of medical absorbable materials;

The material at the folding groove (34) of the folding piece (33) is the thinnest part of the material in the catheter limiting device;

one end of the fixed ring (31) back to the movable ring (32) is provided with a conical structure;

The outer circumferential surface of the conical structure is provided with anti-rotation grooves (35), the anti-rotation grooves (35) are arranged along the direction of a generatrix of the outer circumferential surface of the conical structure, and the anti-rotation grooves (35) are provided with a plurality of anti-rotation grooves and are uniformly distributed on the outer circumference of the conical structure;

An absorption groove is formed in the outer surface of the movable ring (32).

2. The catheter limiting device for a pancreatic intestinal stapler according to claim 1, wherein the folding member (33) is provided with a plurality of circumferentially distributed members uniformly centering on the axis of the stationary ring (31).

3. The catheter stop device for a pancreatic intestinal stapler according to claim 1, wherein the fold groove (34) is located on an outward facing surface of the fold (33).

4. The catheter limiting device for a pancreatic intestinal stapler according to claim 3, wherein the folding groove (34) is provided along the plate surface and is elongated, and a length direction of the folding groove (34) is perpendicular to a length direction of the folding piece (33).

5. The catheter limiting device for the pancreatic intestinal stapler according to claim 4, wherein the cross section of the folding groove (34) is in the shape of an inward concave arc.

6. The catheter limiting device for the pancreatic intestinal stapler according to claim 1, wherein the outer diameter of the fixed ring (31) is equal to the outer diameter of the movable ring (32), and the outward plate surface of the folded piece (33) and the outer surface of the fixed ring are on the same circumferential surface.

7. The pancreatic intestine anastomat comprises a catheter (10), wherein a drainage hole (14) is formed in the wall of one end of the catheter (10), and the pancreatic intestine anastomat is characterized by further comprising the catheter limiting device according to any one of claims 1-6, a fixed ring (31) and a movable ring (32) are sleeved on the catheter (10), the fixed ring (31) is fixedly connected with the catheter (10), the movable ring (32) is slidably connected with the catheter (10), and the movable ring (32) is positioned at one end, far away from the drainage hole (14), of the catheter limiting device.