JP2007301340A - Surgical anastomotic instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surgical anastomotic instrument with which, when a small-diameter tract in a solid organ and a digestive tract are to be anastomosed together, anastomosis is performed positively without requiring a high-level skill, and a required time is shortened to reduce stress on an operator. <P>SOLUTION: The instrument body comprises a tubular unit 12 and a tip end 13, has inside it a cavity 15 formed on the tip end side. A guide 1 having a path extending outward connected with a side hole 18 on the outer peripheral surface of the instrument body rearward compared with the bottom of the cavity part from a hole at the bottom of the cavity 15, and a through hole 16 extending in the axial direction of the cylindrical part of the instrument body is formed. The operating member 4 inserted to the instrument body is provided with a needle pushing member 6 for pushing out a needle 2 extending in a direction of being inserted to the guide 1 of the instrument body and an operation grip 9 on the side of the tip end of a bar-like or cylindrical operating rod 7 which is inserted to the through hole 16 and whose tip reaches inside of the cavity part 15 of the instrument body. The needle 2 connected with a thread 3 of a required length is indwelt in the one guide 1, and the cavity of the instrument body is given a space in which the needle pushing member of the operating rod can move a distance required for anastomosis. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a surgical anastomosis instrument, and more particularly to a medical or veterinary use for performing an anastomosis between two organs in the body, such as an anastomosis between a small organ and a digestive tract. The present invention relates to a surgical anastomosis device used.

  For example, in the gastrointestinal surgery clinic, there are many opportunities for anastomosing the small diameter ducts in the parenchymal organs such as the liver and pancreas, that is, the intrahepatic bile duct or pancreatic duct with the digestive tract. The procedure has problems such as difficulty in deploying a sufficient surgical field because not only the diameter of the original small diameter tube but also the real organ is fixed.

  In particular, pancreaticojejunostomy at the time of pancreaticoduodenectomy is extremely dangerous when anastomotic suture failure occurs. Conventionally, in order to prevent anastomotic suture failure, a tube was placed in the main pancreatic duct and drainage of pancreatic juice was performed outside the body.

  In contrast, pancreatic jejunum full-thickness anastomosis (mucosal anastomosis) is performed by draining the pancreatic juice into the gastrointestinal tract through the anastomosis by reliably anastomosing the whole pancreatic duct, including part of the pancreatic parenchyma, and the entire jejunum. With the increase in the number of experiences, it has been found that the incidence of suture failure is low and the frequency of postoperative anastomotic stenosis is low, and it has become mainstream recently. At that time, if the residual pancreas is accompanied by concomitant pancreatitis, the pancreatic duct is usually dilated and hardened, and mucosal anastomosis is relatively easy. In contrast, in cases where the residual pancreatic function is maintained, the residual pancreas and the main pancreatic duct are soft, and the diameter of the pancreatic duct at the pancreatic stump at the time of anastomosis becomes as thin as about 2 to 3 mm. In order to perform anastomosis with 6 to 8 needles without damaging this pancreatic duct and the entire jejunum, careful and reliable hand movement is necessary. However, since the diameter of the pancreatic duct is small, It is difficult to insert into the appropriate position of the pancreatic duct, and once inserted, it is often difficult to expand the operative field due to the anatomical positional relationship. It may be difficult to operate the needle holder along the This could not be avoided even with a magnifying glass. As described above, the anastomosis between the pancreatic duct and the jejunum is a surgical operation that is very stressed even for a skilled person.

  Further, the more sutures there are, the longer the time required for anastomosis. For example, in the case of stitching / ligating with 8 needles, a time of about 40 minutes is required.

Conventional anastomosis devices have been disclosed in the following documents.
JP-A-9-289991 Japanese Patent Laid-Open No. 10-118078 Japanese Patent Publication No. 5-79336 JP-A-4-226644 Japanese Patent Laid-Open No. 2003-509102 Patent Documents 1 and 2 do not perform suturing but perform anastomosis with staples or clips, and staples remain in the body for a long time or permanently. Patent Document 3 shows an anastomosis device by suturing, which is based on purse string suturing such as rectum, esophagus, etc., and has a limited application site, such as anastomosis between a small organ and a digestive tract. In some cases, it did not fit.

  Patent Document 4 is to incise the anastomosis between the stomach and esophagus and bend the fundus wall inward, to correct gastroesophageal reflux, staple the portion of the fundus wall bent inward, The needle protrudes from the invagination device, which is complicated as an anastomosis procedure and is not suitable for anastomosis between a small organ and a digestive tract.

  Patent Document 5 is a device for suturing the end side of a transplanted blood vessel to the side of an aorta, and a needle connected with a suture thread in the housing of the suturing device passes near the end of the transplanted blood vessel and extends along a guide channel. The direction is changed so that it is returned to the near side through the aorta. This needle is made of a shape memory alloy and progresses while deforming along a curved guide channel, but the guide channel changes its direction in the radial direction once approaching the vicinity of the central axis of the housing, When the curvature of the guide channel becomes large and a shape memory alloy that is flexible enough to follow the curvature is used as the material of the needle, there is a problem that it is actually impossible to sew. If the curvature is to be increased to some extent, the diameter and size of the housing must be increased, which is not appropriate for the suture operation.

  The present inventor provides a guide portion so that the curvature of the guide portion to which the needle advances is not so large at a ratio of a small size suitable for performing anastomosis between the small organ and the digestive tract. The invention of a surgical anastomosis device in which an anastomosis is made has been filed as Japanese Patent Application No. 2004-372723. However, even in this surgical anastomosis instrument, the curvature of the guide part has to be increased due to the shape and dimensions that are actually allowed as an anastomosis instrument, and there are difficulties in terms of design and operation. .

  The incidence of pancreaticojejunostomy anastomosis at the time of pancreaticoduodenectomy is 10 to 30%. In the worst case, anastomosis at the pancreaticojejunostomy may be a fatal factor, and it may occur in a parenchymal organ such as the pancreatic duct. In the anastomosis technique between the small diameter tube and the digestive tract, the damage to the organs to be anastomosed is reduced as much as possible, the anastomosis can be performed reliably, and the anastomosis can be performed without requiring a high degree of skill, giving the operator It was desired to reduce stress. In addition, for example, in the case of anastomosis between the pancreatic duct and the digestive tract, if the time required for the anastomosis becomes long, there are inconveniences due to leakage of pancreatic juice and adversely affecting other organs, and prolonged anesthesia time. It has been desired to shorten the time required as much as possible. For this purpose, as an anastomosis device using a deformable needle made of a shape memory alloy that has been proposed in the past, the needle is guided so that it is actually of a size and shape suitable for anastomosis surgery and that the needle is reliably operated. There were difficulties in creating what could be done.

  The present invention has been made to solve the above-described problems, and a surgical anastomosis instrument according to the present invention is a main body having a cylindrical portion and a smooth tapered tip portion, on the tip side of the main body. A hollow portion is formed therein, and extends from at least one hole in the bottom portion of the hollow portion to at least one side hole in the outer peripheral surface of the main body behind the bottom portion of the hollow portion. At least one guide portion extending along a path extending in the direction is formed, and a through hole penetrating between the bottom portion of the hollow portion and the rear end surface of the tubular portion in the axial direction of the tubular portion of the main body is formed. A main body that is formed, a rod-like or rod-like operation rod that is inserted into a through-hole formed in the axial direction of the cylindrical portion of the main body, and a tip of which reaches the hollow portion of the main body, and a tip side of the manipulation rod Attached to the main body An operation member comprising a needle pushing member extending in a direction to be inserted into the portion, an operation gripping portion attached to or integrally formed on the rear end side of the operation rod, and at least one guide portion in the main body And at least one needle connected to a thread of a length necessary for anastomosis, and the cavity of the main body is used when the operation gripping part of the operation member is pulled backward to perform anastomosis. A needle pushing member attached to the distal end side of the operating rod is provided with a space that can be moved by a stroke required to engage and push the needle and perform anastomosis.

  A conical surface having a converging shape is formed subsequent to the rear side of the tapered portion of the front end portion of the main body, a side hole of the main body is formed in the conical surface of the converging shape, and the front end side of the operation member The needle pushing member attached to the guide member may be formed of a material that is deformable and has a rigidity to push in the needle so as to correspond to the shape of the guide portion that expands when the needle pushing member is advanced through the guide portion.

  The operating rod is rod-shaped, and an axial groove of the main body or the operating rod is formed on the inner surface of the cylindrical portion of the main body and / or the outer surface of the operating rod of the operating member, and the needle along the groove The yarn connected to may be guided rearward along the opening in the cylindrical portion of the main body.

  The operating member has a cylindrical operating rod, and when the needle pushing member of the operating member advances through the guide portion, it can be deformed so as to correspond to the shape of the guide portion spreading and has rigidity to push the needle. It is formed of a cylindrical member, the distal end side of the needle pushing member is attached to the distal end side of the operating rod by a support member, and the thread attached to the needle passes through the needle pushing member and then the distal end of the operating rod You may make it pass from the side toward back.

  The needle may be formed of a shape memory alloy.

  A convex portion is formed on one of the inner surface of the cylindrical portion of the main body and the peripheral surface of the operating rod of the operating member, and a groove for guiding the convex portion in the axial direction is formed on the other side. Good.

  A peelable sheet may be attached to the side hole on the outer peripheral surface of the main body to close it.

  You may provide the retaining member which can be engaged / disengaged over the position near the rear-end part of the said main body, and the said operation holding part.

  The anastomosis instrument according to the present invention guarantees reliable hand movement without requiring a high level of skill, can significantly reduce the incidence of anastomotic suture failure, and greatly reduces the risk of suture failure. It has a great effect. In addition, since the small diameter tube is thin and the operative field tends to be narrow, it greatly contributes to the reduction of the stress received by the operator, and the time required for the anastomosis can be remarkably shortened, so the time required for the anastomosis is long. For this reason, it is prevented that the organ secretion leaks and adversely affects other organs, and it becomes safer in relation to the duration of anesthesia. Further, the curvature of the guide portion can be reduced appropriately in relation to the shape and size allowed for the anastomosis device, which is advantageous in terms of the anastomosis operation.

  An embodiment of a surgical anastomosis instrument according to the present invention will be described with reference to the drawings.

  1 (a) to 1 (d) show the overall configuration of an anastomosis device loaded with one needle as a cross-sectional view, FIG. 1 (a) is an operating member, and FIG. 1 (b) is a main body. (C) shows an anastomosis instrument in which an operation member is inserted into the main body, and (d) shows an anastomosis instrument in a state where the operation member is further pulled backward from the state of (c). In FIG. 1A, the operation member 4 includes a rod-shaped or cylindrical operation rod 7, a needle pushing member 6 attached to the distal end side of the operation rod 7, and a gripping portion attached to the rear end side of the operation rod 7. Nine. The grip 9 may be formed integrally with the operating rod 7. The needle pushing member 6 has a rigidity necessary for pushing the needle during anastomosis, and is made of a material that can be deformed to some extent during the pushing operation, aluminum, or a rigid resin material that has a large rigidity and can be deformed to some extent.

  In FIG. 1B, the main body 11 of the anastomosis instrument has a structure in which the operation member 4 of FIG. 1A is inserted, and includes a cylindrical portion 12 and a tapered tip portion 13 connected to the tip thereof. It has a smooth outer shape so that it can be easily inserted into an organ. Since the cylindrical portion 12 is long, a part thereof is omitted (the same applies hereinafter). A hollow portion 15 is formed inside the front end portion 13 of the main body, and a through-hole 16 communicating from the hollow portion 15 to the rear end of the main body is formed in the cylindrical portion 12.

  A substantially conical surface 14 extending outward is formed on the rear side of the tapered tip portion 13 of the main body, a side hole 18 is formed in this portion, and the space 15 from the cavity portion 15 to the side hole 18 in the tip portion 13 extends. The needle guide portion 1 is in communication. The guide unit 1 stores the needle before the anastomosis, and acts to guide the needle and the needle pushing member 6 that pushes the rear end during the anastomosis.

  At the time of anastomosis, it is desirable that the needle 2 proceeds at an angle that loosely spreads outward from the side hole 18 of the main body, so that the needle pushing member extends from the inner surface of the cavity portion 15 on the distal end side of the main body to the guide portion 1 that continues to the side hole 18. It is better to spread it loosely while being guided along. Therefore, it is desirable that the shape of the portion that continues from the side hole 18 through the guide 1 and continues to the inner surface of the cavity portion 15 advances at an angle that causes the needle pushing member 6 to loosen and spread outward. In addition, the length of the cavity 15 in the axial direction of the main body needs to be secured only for the stroke in which the needle is advanced by the needle pushing member 6 during anastomosis (for example, about 10 mm).

  The guide portion 1 is formed so that the inner diameter is slightly larger than the diameter of the needle and the needle pushing member 6. In addition, since this example is a case where one needle is loaded, there is one side hole 18 and the substantially conical surface 14 extending outward is on one side with respect to the axis of the cylindrical portion 12 of the main body. Overhangs the shape.

  FIG. 1 (c) shows the whole anastomosis instrument in which the operation member 4 of (a) is inserted into the main body 11 of (b) and the needle 2 with the thread 3 is loaded. The thread 3 connected to the needle 2 is guided from the guide portion 1 through the hollow portion 15 in the distal end side of the main body into the through hole 16 in the cylindrical portion 12. The needle 2 is formed of steel or the like when the guide portion 1 is linear, but is preferably formed of a shape memory alloy when the guide portion 1 has a slight curvature. For example, a TiNi alloy or a superelastic TiNi alloy can be used as the shape memory alloy. For example, the needle 2 has a length of 10 mm and a diameter of a rear end to which the thread 3 is connected is about 0.5 mm. Thread 3 is used to suture the small organs of the organ and the digestive tract. For the operation of the pancreatic jejunum, a thread made of polypropylene or the like is used as a non-absorbable thread in the body. As the material to be absorbed, a thread made of nylon or polyethylene glycol can be used. As the specific size of the thread 3 that can be used for the surgery, USP-2-0 to USP-5-0 can be used as appropriate, but the size of the thread 3 is left to the judgment of the doctor who performs the surgery.

  Assuming that the rear end side of the main body is gripped at the time of anastomosis, the distance from the rear end of the cylindrical portion 12 of the main body 11 to the side hole 18 is the distance that the needle 2 advances from the rear end of the main body 11 at the time of anastomosis and the main body. The total length of the main body is determined on the basis of this point and the length in the axial direction required for the cavity 15 on the distal end side of the main body. . The length of the thread 3 needs to be long enough to bind the thread 3 after penetrating the needle 2 through the anastomosis portion.

  FIG. 1 (d) shows a state in which the grasping portion 9 of the operation member 4 is held and pulled backward during the anastomosis from the state of (c), and the needle attached to the operation rod 7 of the operation member 4. The pushing member 6 moves rearward and pushes the needle 2 placed in the guide portion 1 outward together with the thread 3 connected thereto.

  In the anastomosis shown in FIGS. 1A to 1D, the needle pushing member 6 is made of a material having a certain degree of rigidity and cannot be deformed so much. Therefore, the guide portion 1 in the distal end portion 13 of the main body 11 is used. Is shaped to release the needle in a loosely spread outward direction. Therefore, a portion where the guide portion 1 of the tip end portion 13 is slightly protruded outward. In order to prevent the tip portion 13 of the main body 11 from overhanging, the needle pushing member 6 may be made of a rigid resin material that has the rigidity necessary for pushing the needle and that can be further deformed.

  When such a large deformable needle pushing member 6 is used, the anastomosis device can be shaped so that the distal end portion 13 does not protrude outwardly as shown in FIG. In this case, the guide portion 1 mainly guides the needle 2 and the needle pushing member 6 with the curved shape of the surface located to the right of the needle 2 in FIG. Since the needle 2 is detained in the curved portion of the guide portion 1, it is a curved needle. This curved shape has a larger curvature than in the case of FIG. At the position on the left side of the needle 2, the thickness of the guide portion 1 has disappeared to some extent. For this reason, the side hole 18 has a long slit shape when viewed from the side.

  In the state where the operating rod 7 is on the upper side in FIG. 2A, the needle pushing member 6 does not reach the curved portion of the guide portion 1 and does not spread outward. When the operating rod 7 is pulled downward, the needle pushing member 6 pushes out the needle 2 with the thread according to the guide portion 1 while deforming from the distal end side of the needle pushing member 6 according to the curved shape of the guide portion 1, and FIG. Release the needle 2 with the thread as in b).

  FIG. 3A is an enlarged view of the needle and the needle pushing member at the tip of the main body in FIG. In the state before the anastomosis, the needle 2 is placed in the guide portion 1 of the distal end portion 13 of the main body at a position near the side hole 18 so as not to go outward. The guide portion 1 has an inner diameter that is slightly larger than the diameter of the needle 2 so that the needle 2 can pass smoothly. When the diameter of the needle 2 is 0.5 mm, the guide portion 1 is about 0.7 mm so as not to swing as much as possible in the lateral direction. . It is assumed that the rod-like needle pushing member 6 that pushes the needle 2 from the rear end side also has the same diameter as the needle 2. In a state where the needle pushing member 6 pushes the needle 2 from the rear surface side, the thread 3 connected to the rear end side of the needle 2 is pushed sideways. Therefore, the guide portion 1 is provided with a groove portion 1a through which the yarn 2 passes, as shown in FIG. 3 (b) showing a cross section taken along line BB in FIG. 3 (a). When the needle pushing member 6 pushes the needle 2 from the rear end side, the thread can be brought close to the groove portion 1a provided in the guide portion 1 so that the needle 2 to which the thread 3 is connected can be pushed smoothly. This is the same even in the case shown in FIG.

  Further, when performing anastomosis, if the operation member 4 is pulled toward the front side with respect to the main body 11 and the needle 2 with the thread 3 is pushed by the needle pushing member 6, the thread 3 passes through the cylindrical portion of the main body. Proceed toward the tip in the mouth 16. For this reason, the thread 3 moves in the direction opposite to that of the operation rod 7 of the operation member 4 in the opening 16, and the thread 3 is sandwiched between the inner surface of the opening 16 and the peripheral surface of the operation rod 7 and is anastomosed. It tends to interfere with the operation for. Therefore, as shown in FIG. 3C, which shows a cross section taken along line CC of the cylindrical portion of the main body in FIG. 1C, the groove portion 7a parallel to the axial direction is formed on the peripheral surface of the operating rod 7. If it is provided and the yarn 3 is guided along the groove 7a, interference between the operating rod 7 and the yarn 3 can be avoided. Although the groove portion 7a through which the yarn 3 passes is shown on the operation rod 7 side, the groove portion 7a may be provided on the inner surface side of the through-hole 16, or may be partially provided on both sides to form a passage for the yarn together. You may make it give.

  Further, in FIG. 3C, an axial groove 12a is formed on the inner surface side of the through hole 16 in the cylindrical portion of the main body, and a projection 7b is formed on the peripheral surface of the operation rod 7 at a position corresponding to this. Is shown. This is to prevent the operation member 4 from rotating about the axial direction with respect to the main body 11 when the operation unit 4 is pulled toward the front side. Basically, there is no problem if the operation member 4 can be reliably pulled in the axial direction, but if the rotation about the axial direction is applied even slightly, the pushing operation of the needle 2 by the needle pushing member may not be smooth. Therefore, it is preferable to appropriately provide means for preventing the operation member 4 from rotating around the axis.

  The anastomosis device is configured by placing the needle 2 connected to the thread 3 in the guide portion 1 of the main body 11 of the anastomosis device in FIG. 1B and inserting the operation member 4 in FIG. The same applies to the case of 2 (a)). In order to configure the anastomosis device as described above, the main body 11 is formed in a divided type instead of an integral type, and is integrally joined after the operation member 4 is inserted. For example, the main body 11 is a plane passing through the axis. It can be set as the form which joins what was divided into two, or the form divided into the cylindrical part 12 and the front-end | tip part 13. FIG. The grip portion 9 of the operation member 4 may be formed integrally with the operation rod 7, but when a separate one is attached, the portion of the operation member 4 other than the grip portion 9 is inserted into the main body 11 lastly. A grip 9 may be attached.

  FIG. 4 (a) shows the configuration of an anastomosis device loaded with a plurality of needles. The components are indicated by the same numbers as those in the case of anastomosis loading with one needle, and an operation member is provided in the main body 11. 4 is shown inserted. The number of needles to be loaded is the number of needles for simultaneously moving the needles at the time of anastomosis, and is set to an appropriate number such as 2, 4, 6, or the like. The side hole 18 through which the needle is released in the main body 11 and the guide portion 1 following the side hole 18 are preferably arranged at equiangular intervals around the axial direction, and the shape of the distal end portion 13 of the main body is rotationally symmetric. Each guide portion is formed with a groove portion 1a through which the yarn 3 is guided as shown in FIG. Further, it is preferable to provide the same number of axial grooves 7a as the number of needles 2 on the circumferential surface of the operating rod 7 of the operating member 4 or the inner surface of the cylindrical portion 12 of the main body.

  On the distal end side of the operation rod 7 of the operation member 4, the same number of rod-like needle pushing members 6 as the number of needles to be loaded for pushing the needle 2 placed in the guide portion 1 are aligned with the direction of the guide portion 1. To be fixed.

  In the case shown in FIG. 4A, as in the case of FIGS. 1A to 1D, the needle pushing member 6 is made of a material having a certain degree of rigidity. Although the shape is slightly expanded outward, the curvature of the guide portion 1 is increased by using a material having a lower rigidity and being easily deformed as the needle pushing member 6, and the main body as shown in FIG. The tip 13 can be shaped so as not to spread outward. In this case, each side hole 18 has a slit-like shape that is long in the axial direction, and the needle 2 is placed in the curved portion of the guide portion 1, so that a curved needle is used.

  FIGS. 5A to 5D are examples of anastomosis in which the operating rod 7 and the needle pushing member 6 of the operating member 4 are formed in a cylindrical shape, and a cross section substantially when a plurality of needles are loaded. It is shown in the figure. FIG. 5A shows the operation member 4 with only the needle attached. In the anastomosis device according to this example, the operation rod 7 and the needle pushing member 6 of the operation member 4 are respectively cylindrical members. The thread 3 is formed so that it can pass through the cylindrical member. The operating rod 7 has an inner diameter that allows the thread to pass therethrough, has a rigidity that does not substantially deform, and is provided as many as the number of needles that move simultaneously.

  The needle pushing member 6 has an outer diameter that is approximately the same as the diameter of the needle 2, and the inner diameter is set to a size that allows a single thread connected to the needle 2 to pass through. Further, when the guide portion 1 has a smooth curved shape, the needle pushing member 6 needs to bend along the guide portion, and the needle pushing member 6 has flexibility that can be bent along the guide portion 1. At the same time, the needle 2 with the thread 3 is formed of a material that has enough rigidity to be pushed in. To attach the needle pushing member 6 to the operating rod 7, as shown in FIG. 5A, a flange member 5 as a support member for the needle pushing member 6 is attached to the distal end side of the operating rod 7, and the needle pushing into the flange member 5 is performed. The member 6 is attached. A hole is formed in the flange member 5 at a position where the needle pushing member 6 is attached, and the end side of the needle pushing member 6 is inserted and fixed to each hole.

  FIG. 5B shows the main body 11 of the anastomosis device in a cross section substantially passing through the central axis, but the guide portion 1 is conceptually shown. The main body 11 has a cylindrical portion 12 and a tapered tip portion 13 connected to the tip thereof, and is formed so as to have a smooth outer shape as a whole. A hollow portion 15 is formed inside the main body 11 from the cylindrical portion 12 to the front end portion 13, so that the central opening 16 penetrates between the hollow portion 15 and the rear end of the main body 11 in the cylindrical portion 12. Is formed. Moreover, the guide part 1 connected from the hole 17 in the bottom part of the cavity part 15 to the side hole 18 in the surrounding surface of the cylindrical part 11 of a main body is formed by the number of the needles which move simultaneously. The guide part 1 is formed so as to reach a side hole 18 on the peripheral surface of the cylindrical part 12 from the hole 17 in the bottom part of the cavity part 15 and form a smooth passage, and is formed as many as the number of needles for moving the needle at the same time. .

  The guide unit 1 guides the needle along a straight or loosely bent path from a state in which the needle is housed inside. In FIG. 5 (b), the guide portion 1 has a curved path, and the side hole 18 follows a path that slowly detours around the through-hole 16 at the center from the hole 17 at the bottom of the cavity 15 and turns downward. Thus, the shape of the guide portion 1 is set such that the needle 2 connected with the thread 3 spreads backward from the side hole 18 at a gentle angle with respect to the peripheral surface of the cylindrical portion 12 of the main body. Thus, when setting it as the curved guide part 1, the needle | hook 2 is good to be formed with the shape memory alloy. Further, the hollow portion 15 in the main body 11 is a space in which the flange portion 5 of the operating member 4 can move by the stroke of pushing out the needle during anastomosis, and the side hole 18 from the rear end of the pair of cylindrical portions 12. The distance from the rear end of the main body 11 is equal to or longer than the combined length of the stroke that the needle 2 advances during anastomosis and the portion that holds the main body, as in the previous example.

  FIG. 5C is a cross-sectional view taken along a line DD in the main body 11 of FIG. 5B, and shows a case where six guide portions 1 are provided. FIG. 5 (d) shows an anastomosis instrument in which the operation member 4 shown in FIG. 5 (a) is inserted into the main body 11 shown in FIG. 5 (b). When the operation unit 4 is inserted into the main body 11, the thread 3 connected to the needle 2 is pulled into the operation rod 7 from the hole 8 of the flange portion 5 through the pressing member 6, and the rear end of the needle 2 is the pressing member. The operation member 4 is loaded with as many needles 2 as necessary to move the needle 6 at the same time. The operating rod 7 of the operating member 4 to which the needle 2 to which the thread is connected is attached is inserted into the through-hole 16 of the main body 11 without attaching the operating grip 9, and the pushing member 6 and its distal end are inserted. The needle 2 on the side is inserted into the guide portion 1 from the opening 17 and is left so that the tip of the needle 2 does not protrude outward from the side hole 18. When the needle 2 is inserted into the guide portion 1, the needle 2 formed of a shape memory alloy is deformed according to the smooth bent shape of the guide portion 1.

  Further, when each needle 2 is inserted into the guide portion 1 and the rear end of the operation rod 7 comes out from the rear end of the main body 11, the operation gripping portion 9 is attached to the end portion side of the operation rod 7, and the main body 11 As shown in FIG. 5D, the anastomosis can be performed. However, a thin sheet (not shown) is attached to the outside of the side hole 18 in order to prevent the needle 2 from protruding outward from the side hole 18 of the main body 11 in some situation at the start of the anastomosis. It is better to remove this sheet when performing anastomosis.

  Further, when the operation gripping portion 9 is pulled out by some action from the state shown in FIG. 5D, the needle 2 tends to come out from the side hole 18, but in order to prevent this, the main body 11 At least one concave portion 19 is formed at a position near the rear end, and a retaining member 9a provided with a convex portion that engages with the concave portion 19 can be attached to or integrally formed with the operation gripping portion 9. It is good to form. When performing the anastomosis, the operation gripping part 9 can be pulled out by removing the convex part of the retaining member 9a from the concave part 19 or removing it by folding.

  In this way, the attachment of a thin sheet to the outside of the side hole 18 and the provision of a retaining member for the operation gripping portion 9 may be performed as appropriate in the case of the anastomosis apparatus shown in FIGS. .

In the above description, a typical example of the anastomosis apparatus of the present invention has been shown. However, the shape of the main body and the operation member can be implemented in a modified form in the technical idea of the present invention.
[Procedure for anastomosis]
The anastomosis between the parenchymal organ and the digestive tract using the anastomosis apparatus of the present invention will be described below by taking as an example the procedure of anastomosing the remaining pancreatic main pancreatic duct and jejunum during pancreaticoduodenectomy.

(A) A small hole is opened in the jejunum in the vicinity of the opposite side to be anastomosed, and the end of the main pancreatic duct that is to be anastomosed is brought into alignment with the opening.
(B) Prepare an anastomosis device loaded for the number of needles 2 to which the needle 2 connected with the thread 3 is moved. When the side hole 18 is closed with a sheet, the sheet is removed. Hold the rear part of the main body 11 of the anastomosis device, insert the tip 13 through the small hole prepared in (a), penetrate from the mucosal surface to be anastomosed to the serosa side, and insert it into the target main pancreatic duct (FIG. 6).
(C) Next, the entire surface of the jejunal serosa surface to be anastomosed is brought into close contact with the remaining pancreatic section. At this time, the insertion depth is set so that the position of the side hole 18 of the main body 11 of the anastomosis instrument is an appropriate position for releasing the needle and performing the anastomosis.

(D) While holding the back of the main body 11 with the fingers of one hand at the position where the anastomosis is performed, hold the operation gripping part 9 of the anastomosis device with the fingers of the other hand and pull it forward (the retaining member is provided). If it is, remove it in advance). Thereby, the flange 5 and the pushing member 6 in the cavity 15 of the main body 11 move downward (to the left in FIG. 7), and the tip of the pushing member 6 pushes the rear surface of the needle 2. The needle 2 is deformed in accordance with the shape of the guide portion 1 when loaded into the anastomosis device, but maintains a shape when it is pushed out by the tip of the push-in member 6 and exits from the side hole 18 and is inclined rearwardly. Is released in a parabolic manner, penetrates through the main pancreatic duct and parenchyma of the residual pancreas, passes through the cross section of the residual pancreas, and penetrates from the closely attached jejunal serous muscle layer to the jejunal mucosa side (FIG. 7).
(E) The needle 2 penetrating to the jejunal mucosa side is grasped with a needle holder, and the needle 2 and the thread 3 are guided.
(F) When the anastomosis apparatus is slowly removed, only the needle 2 and the thread 3 remain (FIG. 8).

(G) When the needle 2 is removed from the thread 3 and the stumps of each thread 3 are ligated, the anastomosis of the remaining pancreatic main pancreatic duct and the entire jejunum is completed.
(H) The small hole produced first is closed.
The anastomosis is performed by the above procedures (a) to (h).

  The operation of the anastomosis with the anastomosis device is the stage (d) in the above procedure, (a) to (c) are the previous stage, and (e) to (h) are the subsequent stage. At the stage (d), it is necessary to push the operation gripping part 9 until the needle 2 is penetrated from the position in the anastomosis device to the jejunal mucosa side. This corresponds to the movement stroke of the flange portion 5 in the hollow portion 15 in the main body 11. Therefore, in order to perform the anastomosis reliably, the travel of the flange portion 5 and the length of the push-in member 6 should only compensate for the needle 2 finally penetrating to the jejunal mucosa side during the anastomosis. I must.

  That is, in the pushing member 6, the tip of the pushing member 6 comes out of the side hole 18 of the main body 11 and penetrates the needle 2 to the jejunal mucosa side when the flange portion 5 comes into contact with the lower portion of the hollow portion 15 in the main body 11. It is necessary to ensure only the length. Further, the pushing member 6 needs to be made of a material having rigidity and flexibility suitable for performing the pushing operation of the needle 2 while passing through the guide portion 1. Furthermore, the guide portion 1 is released from the side hole 18 of the main body 11 while the needle 2 is being pushed into the pushing member 6, passes through the parapancreatic main pancreatic duct and the parenchyma, passes through the cross section of the residual pancreas, and is brought into close contact It is necessary to have a smoothly bent shape so that it can penetrate from the jejunal serous muscle layer to the jejunal mucosa side.

  In the anastomosis operation using the anastomosis apparatus of the present invention, ligation is performed for each thread 3, but the operation of penetrating the needle 2 through the anastomosis site is performed by the needle connected to the thread 3 loaded in the anastomosis instrument. Two or more of the two can be performed simultaneously. For example, in the case where 8 needles are passed through each needle and 8 places are sutured, conventionally, it took about 40 minutes. However, the 8 needles 2 are passed simultaneously using the anastomosis device of the present invention. If ligated, the time can be shortened by 30 minutes or more.

(A) is a figure which shows the operation member in the surgical anastomosis instrument by this invention loaded with one needle substantially in the cross section of an axial direction. (B) shows the body in a surgical anastomosis instrument according to the present invention loaded with a single needle in a substantially axial section. (C) is a figure which shows the surgical anastomosis instrument in the state which inserted the operation member of (a) in the main body of (b). (D) is a figure which shows the state which pulled the operation member back in the case of anastomosis from the state of (c). (A) is a figure which shows the cross section of a substantially axial direction in the state before performing anastomosis of the surgical anastomosis machine of the other form by this invention which loads one needle | hook. (B) is a figure which shows the state which pulled the operation member back in the case of anastomosis from the state of (a). (A) expands and shows the part of the needle | hook and needle pushing member in the front-end | tip part of a main body in FIG.1 (c). (B) is a figure which shows the cross section taken on the BB line of (a). (C) is a figure which shows the cross section taken on CC line in FIG.1 (c). (A) is a diagram showing a surgical anastomosis instrument according to the present invention loaded with a plurality of needles in a substantially axial section. (B) is a schematic axial section of another form of surgical anastomosis instrument according to the present invention loaded with a plurality of needles. (A) is a figure which shows the operation member in the surgical anastomosis instrument by another form of this invention which loads a several needle | hook with a substantially axial cross section. (B) is a figure which shows the main body in the surgical anastomosis instrument by another form of this invention which loads a several needle | hook with a substantially axial cross section. (C) is sectional drawing which took the straight line DD in the main body of (b). (D) is an anastomosis instrument in which the operation member shown in (a) is inserted into the main body shown in (b). It is a figure which shows the state which inserts the anastomosis instrument of this invention in the anastomosis site | part in the case of an anastomosis. It is a figure which shows the state which pulled the operation holding part and the needle penetrated the anastomosis part. It is a figure which shows the state which removed the anastomosis instrument, removed the needle | hook from the thread | yarn, and the thread | yarn remained.

Explanation of symbols

1 Guide part 2 Needle 3 Thread 4 Operation member 5 Flange part (support member)
6 Pushing member 7 Operation rod 8 Hole 9 Operation gripping part 9a Retaining member 11 Main body 12 Tubular part 13 Tip part 14 Substantially conical surface 15 Cavity part 16 Through hole 17 Hole 18 Side hole 19 Recessed part

Claims (8)

A main body having a cylindrical portion and a smooth tapered tip, wherein a cavity is formed inside at the tip of the main body, and at least one hole in the bottom of the cavity is behind the bottom of the cavity And at least one guide portion extending in a linearly or loosely curved path extending continuously with at least one side hole on the outer peripheral surface of the main body, and forming an axis of the cylindrical portion of the main body A main body formed with a through hole penetrating between a bottom portion of the hollow portion and a rear end surface of the cylindrical portion in a direction;
A rod-shaped or cylindrical operating rod that is inserted into a through-hole formed in the axial direction of the cylindrical portion of the main body and has a distal end reaching the hollow portion of the main body, and a guide portion of the main body that is attached to the distal end side of the operating rod. An operation member comprising a needle pushing member extending in a direction to be inserted into the operation lever, and an operation gripping portion attached to or integrally formed with the rear end side of the operation rod,
At least one needle that is placed in at least one guide portion in the main body and connected to a thread of a length necessary for anastomosis,
The hollow portion of the main body includes a needle pushing member attached to the distal end side of the operating rod when the anastomosis is performed by pulling the operation gripping portion of the operating member backward, and is pushed in by engaging the needle. A surgical anastomosis device characterized by providing a space that can be moved only by a stroke required for performing an anastomosis.   A conical surface having a converging shape is formed subsequent to the rear side of the tapered portion of the front end portion of the main body, a side hole of the main body is formed in the conical surface of the converging shape, and the front end side of the operation member The needle pushing member attached to the guide member is formed of a material that can be deformed so as to correspond to the shape of the guide portion when the needle pushing member is advanced through the guide portion and has a rigidity to push the needle. Item 2. The surgical anastomosis device according to item 1.   The operating rod is rod-shaped, and an axial groove of the main body or the operating rod is formed on the inner surface of the cylindrical portion of the main body and / or the outer surface of the operating rod of the operating member, and the needle along the groove The surgical anastomosis instrument according to claim 1 or 2, wherein the thread connected to the guide is guided rearwardly along a passage in the cylindrical portion of the main body. The operating member has a cylindrical operating rod, and when the needle pushing member of the operating member advances through the guide portion, it can be deformed so as to correspond to the shape of the guide portion spreading and has rigidity to push the needle. It is formed of a cylindrical member, the distal end side of the needle pushing member is attached to the distal end side of the operating rod by a support member, and the thread attached to the needle passes through the needle pushing member and then the distal end of the operating rod The surgical anastomosis instrument according to claim 1, wherein the surgical anastomosis instrument is passed from the side toward the rear.   The surgical anastomosis instrument according to any one of claims 1 to 4, wherein the needle is made of a shape memory alloy.   A convex portion is formed on one of the inner surface of the cylindrical portion of the main body and the peripheral surface of the operating rod of the operating member, and a groove for guiding the convex portion in the axial direction is formed on the other side. The surgical anastomosis instrument according to any one of claims 1 to 5.   The surgical anastomosis instrument according to any one of claims 1 to 6, wherein a peelable sheet is attached to a side hole in the outer peripheral surface of the main body and closed.   The surgical anastomosis instrument according to any one of claims 1 to 7, further comprising a retaining member that can be engaged and disengaged across a position near the rear end of the main body and the operation gripping part.

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