A laparoscopic liver suspension device

Abstract

The present invention aims at the defect that the existing surgical auxiliary device cannot help medical staff to limit the position of the liver in a non-invasive manner, and thus cannot effectively perform surgical treatment of the hepatogastric space. The present invention provides a laparoscopic liver suspension device, wherein the holding portion (1) of the device is clamped and fixed on the first internal tissue of the patient through a clamping mouth (11) to hold the liver suspension device in the patient's body in a hanging manner; the holding portion (1) is constructed as an elastic double-arm clamp structure, and the clamping mouth (11) is provided with a clamping piece (12) on its clamping surface in such a way that it can limit the position of the first internal tissue while maintaining the shape of the first internal tissue. The present invention can clamp the first internal tissue in a non-invasive manner, so that the first internal tissue and the left lobe of the liver leave the hepatogastric space under the pulling action of the elastic sling (2).

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a laparoscopic liver suspension device. Background Art

[0002] When performing abdominal surgery, doctors usually use endoscopic surgery with small surgical incisions. During the operation, depending on the surgical site, doctors need to temporarily shift other organs in advance to expose the field of view required for the operation. Existing technology usually uses tissue retractor suspension to perform the operation. Currently, organ shifting operations mainly include the following two options:

[0003] The first solution is to use a medical instrument with clampable ends to clamp the organ tissue that needs to be displaced and the inner wall of the abdominal cavity respectively. The disadvantage is that the clamp is easy to fall off when a relatively large traction force is required, and the clamp is easy to cause damage to the inner wall of the abdominal cavity. It is difficult to provide the support required for a large traction force by pressurizing the abdominal cavity.

[0004] Another solution is to open at least two penetration holes in the abdominal cavity, and then use a linear instrument to suspend the organ that needs to be pulled through the surface tissue. The disadvantage of this type of operation is that it requires more penetration holes, which increases the patient's injury and the doctor's workload.

[0005] Patent document with publication number CN103829979A discloses a pneumoperitoneum-free laparoscopic abdominal wall suspension device, which comprises an incision protection sleeve with a suspension function and a splint. The incision protection sleeve with a suspension function is integrally formed from bottom to top by a lifting piece, a ring sleeve and a fixing part. The incision protection sleeve and the splint are fixedly connected by the fixing part. The incision protection sleeve with a suspension function is made of soft material. The thickness of the lifting piece is greater than the thickness of the ring sleeve. The device also includes a hollow annular support ring installed on the inner wall of the ring sleeve. The shape of the support ring is the same as that of the incision protection sleeve, and the hardness of the support ring is greater than the hardness of the incision protection sleeve. The thickness of the lifting piece of the incision protection sleeve with a suspension function of the device near the central area is less than that of the edge area. The device can be used to support the abdominal wall under the surgical incision, which not only avoids unnecessary damage to the abdominal wall, but also allows a good surgical field of view. At the same time, the structure is simple and the operation is convenient. The pneumoperitoneum-free laparoscopic surgery can be completed using conventional laparoscopic surgical instruments to avoid adverse reactions caused by pneumoperitoneum.

[0006] The patent document with publication number CN104203079A discloses a laparoscopic retractor having a single shaft with a proximal end and a distal end. The distal end of the shaft terminates in a T-shaped piece, which is attached to the shaft by one or more hinges. These hinges allow the T-shaped piece to independently rotate and / or swivel around the shaft. The proximal end of the shaft terminates in a handle, so that the surgeon can manipulate the retractor after inserting it into the abdominal cavity of a patient. The proximal and distal ends of the T-shaped piece each have a grasper that can be controlled by the surgeon. However, this solution has the following shortcomings: the first clamp head and the back-up handle cannot be separated, one wound can only achieve retraction at one position, and additional wounds are required when performing multi-point migration. Second, the first end clamp head and the second end clamp head of the patent are rigidly connected, and the fixed positions at both ends cannot be operated separately, which brings inconvenience to the doctor's operation. Third, the distance between the clamp heads at both ends is fixed, and the length of the connecting part cannot be adjusted according to actual needs. In summary, this solution has many defects in operation and use.

[0007] Therefore, in view of the defects of the prior art, a liver suspension device is needed that can non-invasively clamp and suspend the body tissue and liver. In particular, a liver suspension device is needed that can effectively protect the clamped tissue, suspended organs and suspended tissue, and prevent the above-mentioned body tissue from being damaged during the suspension process. In addition, a liver suspension device is also needed to adjust its suspension position and force on the liver according to the changes in the actual surgical environment, so that the liver-stomach space can always be exposed to the surgeon's field of vision.

[0008] In addition, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the inventor studied a large number of documents and patents when making the present invention, but due to space limitations, not all details and contents are listed in detail. However, this does not mean that the present invention does not have the characteristics of these prior arts. On the contrary, the present invention already has all the characteristics of the prior art, and the applicant reserves the right to add relevant prior art to the background technology. Summary of the invention

[0009] In view of the shortcomings of the prior art, the technical solution of the present invention provides a laparoscopic liver suspension device, which at least includes a holding part, wherein the holding part holds the liver suspension device in the patient's body in a hanging manner in a manner that the clamping opening is clamped and positioned on the patient's first body tissue; the holding part is constructed as an elastic double-arm clamp structure, and the clamping opening is provided with a clamping piece on its clamping surface in a manner that it can limit the position of the first body tissue while maintaining the shape of the first body tissue, wherein at least two of the clamping pieces are arranged on two opposite clamping surfaces where the clamping opening contacts the first body tissue. The advantage is that the holding part can selectively clamp the first body tissue in the patient's body under the control of the doctor, and by optimizing the clamping opening of the holding part, the clamping opening can effectively ensure the integrity of the first body tissue clamped by it while clamping the first body tissue, so that the left lobe of the liver can leave the hepatogastric space under the pulling action of the liver suspension device, eliminating the shielding of the left lobe of the liver on the hepatogastric space, thereby exposing the hepatogastric space to the doctor's field of vision, and facilitating the doctor to process the tissue structure of the hepatogastric space.

[0010] According to a preferred embodiment, the clamping member is provided with limiting edges on its surface in a manner that it can limit the position of the first internal body tissue clamped by the clamping opening, wherein the clamping member includes a first clamping member and a second clamping member that can limit the position of the first internal body tissue located in the clamping opening; the limiting edges are arranged on the surface of the first clamping member at intervals along the first direction, and the limiting edges are also arranged on the surface of the second clamping member at intervals along the second direction, and when the clamping opening is closed, the first clamping member and the second clamping member fit each other in a manner that the limiting edges arranged on the surfaces of the two members are staggered, thereby clamping the first internal body tissue. The advantage is that the first clamping member and the second clamping member can increase the contact area and the force area between the first internal body tissue and the clamping member, thereby improving the stability of the clamping member clamping the first internal body tissue and ensuring that the force area of ​​the clamped part of the first internal body tissue is large enough, thereby effectively dispersing the extrusion force on the first internal body tissue, so that the first internal body tissue can maintain the integrity of the tissue structure during the clamping and pulling process.

[0011] According to a preferred embodiment, the surfaces of the first clamp and the second clamp are respectively provided with limiting grooves that can cooperate with the limiting edges, wherein the surface of the first clamp is provided with the limiting grooves at intervals along the second direction in a manner consistent with the arrangement of the limiting edges on the surface of the second clamp; the surface of the second clamp is provided with the limiting grooves at intervals along the first direction in a manner consistent with the arrangement of the limiting edges on the surface of the first clamp. Its advantage is that by providing the limiting grooves and limiting edges at intervals, the first body tissue such as the hepatogastric ligament and the omentum tissue at the edge of the hepatogastric ligament can be better fixed between the first clamp and the second clamp. In particular, the limiting grooves and limiting edges staggered along the first direction and the second direction can better clamp the omentum tissue in a grid form, and the limiting edges at different positions can clamp and fix the omentum tissue in different directions.

[0012] According to a preferred embodiment, when the first clamping member and the second clamping member are in contact with each other, the limiting edge on the first clamping member can cooperate with the limiting groove on the second clamping member, and the limiting groove on the first clamping member can cooperate with the limiting edge on the second clamping member, so that the clamping members can limit the position of the first internal body tissue in a manner of increasing the contact area between the first clamping member, the second clamping member and the first internal body tissue and changing the clamping form of the first clamping member, the second clamping member on the first internal body tissue.

[0013] According to a preferred embodiment, the retaining portion is provided with at least one engagement hole for engaging with a clamp applier on a side away from the clamping mouth, and the engagement hole is used to withstand the opening force provided by the clamp applier, thereby opening the clamping mouth; the retaining portion is also provided with an elastic member capable of forming a clamping force against the first internal body tissue at one end away from the clamping mouth, and the elastic member can limit the shape of the retaining portion in the absence of an opening force, so that the clamping mouth is closed or clamped with the first internal body tissue under the clamping force of the elastic member.

[0014] According to a preferred embodiment, the elastic double-arm clamp constructed by the retaining portion is further connected at one end away from the clamping port to an elastic sling capable of pulling the first internal body tissue clamped by the clamping port away from its initial position in the patient's body, and the elastic sling is further connected at one end away from the retaining portion to a hanging part capable of fixing the elastic sling in a hanging manner on a second internal body tissue away from the liver.

[0015] According to a preferred embodiment, when the clamping port clamps the first internal body tissue, the doctor adjusts the hanging position of the hanger according to the stretching parameters of the elastic sling and the position of the second internal body tissue, so that the first internal body tissue and the left lobe of the liver leave the hepatogastric space under the pulling action of the elastic sling.

[0016] According to a preferred embodiment, a connecting unit capable of limiting the position of the elastic sling on the elastic member is also provided on the elastic member of the retaining portion. The connecting unit can pull the elastic sling to move on the ring body of the elastic member under the operation of a doctor, thereby changing the direction of the pulling force provided by the elastic sling.

[0017] According to a preferred embodiment, the surfaces of the first clamp and the second clamp are further provided with an adhesive layer capable of improving the adhesion between the first internal body tissue and the first internal body tissue, and the adhesive layer can further limit the shape of the first internal body tissue in the closed clamping opening by expanding by absorbing liquid and compressing the accommodation space of the first internal body tissue. The advantage is that the adhesive layer can absorb tissue fluid or mucus flowing out of the first internal body tissue such as the hepatogastric ligament and the omentum tissue at the edge of the hepatogastric ligament clamped by the first clamp and the second clamp, and expand when absorbing tissue fluid, so that the first clamp and the second clamp can better clamp the first internal body tissue. The adhesion layer can remove tissue fluid or mucus on the surface of the first internal body tissue, thereby increasing the friction coefficient between the first clamping member, the second clamping member and the first internal body tissue, so that the first clamping member and the second clamping member can clamp the first internal body tissue more stably. In addition, the expansion of the adhesion layer can compress the accommodating space of the first internal body tissue between the first clamping member and the second clamping member, thereby increasing the interaction force between the first internal body tissue and the first clamping member and the second clamping member, thereby further limiting the relative position between the first internal body tissue and the first clamping member and the second clamping member.

[0018] The technical solution of the present invention also provides a laparoscopic liver suspension device, which includes at least two clamping members that limit the position of a first internal body tissue in a relatively arranged manner, and the clamping members are provided with limiting edges on their surfaces in a manner that they can limit the position of the first internal body tissue clamped by the clamping mouth, wherein the clamping members include a first clamping member and a second clamping member that can move relative to each other to limit the position of the first internal body tissue located in the clamping mouth; the limiting edges are arranged on the surface of the first clamping member at intervals along the first direction, and the limiting edges are also arranged on the surface of the second clamping member at intervals along the second direction, and when the clamping mouth is closed, the first clamping member and the second clamping member fit together in a manner that the limiting edges arranged on the surfaces of the two members are staggered with each other, thereby clamping the first internal body tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a preferred laparoscopic liver suspension device proposed by the present invention;

[0020] Figure 2 It is a structural schematic diagram of a holding portion of a preferred laparoscopic liver suspension device proposed by the present invention;

[0021] Figure 3 It is a schematic plan view of a first clamping member of a preferred laparoscopic liver suspension device proposed by the present invention;

[0022] Figure 4 It is a schematic plan view of a second clamping member of a preferred laparoscopic liver suspension device proposed by the present invention.

[0023] Reference numerals list

[0024] 1: holding portion; 2: elastic sling; 3: hanging member; 4: connecting unit; 11: clamping opening; 12: clamping member; 13: limiting edge; 14: limiting groove; 15: engaging hole; 16: elastic member; 17: adhesive layer; 121: first clamping member; 122: second clamping member. DETAILED DESCRIPTION

[0025] The following is a detailed description with reference to the accompanying drawings.

[0026] Example 1

[0027] The present application provides a laparoscopic liver suspension device, which may include a holding portion 1, an elastic sling 2, a hanging member 3 and a connecting unit 4.

[0028] according to Figure 1 In a specific embodiment shown, the holding portion 1 can non-invasively clamp a first internal tissue of a patient, and an end of the holding portion 1 away from the first internal tissue clamped therein is movably connected to an elastic sling 2 through a connecting unit 4. An end of the elastic sling 2 away from the holding portion 1 is also connected to a hanging member 3 capable of connecting the elastic sling 2 to a second internal tissue of the patient. When the holding portion 1 clamps the first internal tissue, the doctor suspends the first internal tissue and the liver connected to the first internal tissue by hanging and fixing the hanging member 3 connected to the elastic sling 2 on the second internal tissue, so that the left lobe of the liver can leave the hepatogastric space under the pulling action of the liver suspension device, eliminating the obstruction of the hepatogastric space by the left lobe of the liver, thereby exposing the hepatogastric space to the doctor's field of vision, making it convenient for the doctor to treat the tissue structure of the hepatogastric space.

[0029] like Figure 2As shown, the holding portion 1 is formed by two intersecting rods into a clamping structure in the form of an elastic double-arm clamp. The front end of the clamping structure can clamp the designated first body tissue, so that under the action of external force, the clamping structure pulls the clamped first body tissue to move, thereby exposing the surgical site to be treated to the doctor's field of vision. Preferably, the holding portion 1 may include a clamping mouth 11, a clamping member 12 and a limiting edge 13. The clamping mouth 11 is used to clamp and fix the designated first body tissue, so that the holding portion 1 can be maintained in the patient's body in a hanging manner. Specifically, the liver suspension device enters the body through a laparoscope cannula (Trocar, the maximum diameter is usually 10mm or 12mm). When the liver suspension device is folded, the diameter of the liver suspension device is smaller than the diameter of the laparoscope cannula, which facilitates its directional movement in the cannula. When the liver suspension device is delivered into the abdominal cavity of the patient, the doctor opens the clamping port 11 and positions the clamping port 11 on both sides of the first internal tissue to be clamped, so that after the opening force applied to the holding portion 1 is removed, the clamping port 11 is closed, thereby clamping and limiting the first internal tissue. Preferably, the clamping port 11 is provided with a clamping member 12 on its clamping surface in such a way that it can limit the position of the first internal tissue while maintaining the shape of the first internal tissue. At least two clamping members 12 are respectively provided on two opposite clamping surfaces where the clamping port 11 contacts the first internal tissue. Preferably, the clamping port 11 is the end of the rod body of two intersecting rods constituting the holding portion 1, wherein the end of the rod can also be detachably mounted with a clamping member 12 that can prevent the clamping port 11 from causing damage to the first internal tissue when clamping the first internal tissue. Preferably, the plate-shaped clamping member 12 can be parallel to the plate surface of the clamping port 11.

[0030] Preferably, when the clamping opening 11 is closed, the designated first internal body combination is clamped between the clamping members 12 respectively arranged on the two opposite surfaces of the clamping opening 11. Preferably, the clamping member 12 can directly contact the first internal body tissue, and the clamping member 12 is made of a non-rigid material, so as to reduce the pressure intensity of the clamping member 12 on the first internal body tissue, especially to avoid the high-intensity impact and compression of the first internal body tissue caused by the inertial force of the two clamping members 12 moving towards each other at the moment when the opening force disappears, so that the clamping member 12 can gradually clamp the first internal body tissue under the action of the clamping force, and in the above process, the clamping member 12 can form a buffer force through slight deformation to avoid the first internal body tissue from being damaged at the moment of being clamped. Preferably, the clamping member 12 can adjust the relative relationship between its central axis and the axis of the rod, so that the clamping surface of the clamping member 12 can be suitable for the form and shape of the first internal body tissue. Specifically, when the extended length of the first internal body tissue is long and the lateral width is narrow, the clamping member 12 can be set so that its central axis coincides with the axis of the rod; when the extended length of the first internal body tissue is short and the lateral width is wide, the clamping member 12 can be set so that its central axis coincides with the axis of the rod, so that as much of the first internal body tissue as possible can be clamped by the clamping member 12, thereby improving the stability of the first internal body tissue when clamped by the clamping member 12, thereby avoiding damage to the first internal body tissue under the action of the pulling force due to the high concentration of the pulling force when the first internal body tissue is pulled by the retaining portion 1.

[0031] Preferably, the two clamping members 12 are provided with limiting edges 13 on their surfaces in such a manner that they can limit the position of the first body tissue clamped by the clamping opening 11. Specifically, the clamping member 12 includes a first clamping member 121 and a second clamping member 122 respectively provided on two rods. When the two rods constituting the retaining portion 1 move toward each other so that the clamping opening 11 is closed, the first clamping member 121 and the second clamping member 122 move toward each other and finally fit together. Preferably, under the action of the opening force, the gap between the first clamping member 121 and the second clamping member 122 is used to accommodate the first body tissue. Figure 3 and 4As shown, limiting ribs 13 are respectively arranged on two opposing surfaces of the first clamping member 121 and the second clamping member 122. Further preferably, a plurality of limiting ribs 13 are arranged on the surface of the first clamping member 121 at intervals along the first direction. Further preferably, a plurality of limiting ribs 13 are also arranged on the surface of the second clamping member 122 at intervals along the second direction. When the clamping opening 11 is closed, the first clamping member 121 and the second clamping member 122 fit each other in a manner that the limiting ribs 13 arranged on the surfaces of the first clamping member 121 and the second clamping member 122 are staggered with each other, thereby clamping the first body tissue. Preferably, the first direction and the second direction are perpendicular to each other, for example, the first direction can be the length direction of the clamping member 12, and the second direction can be the width direction of the clamping member 12. Preferably, the length of the limiting ribs 13 is less than the width of the clamping member 12, so that the second clamping member 122 is provided with at least two limiting ribs 13 on a width straight line parallel to its width direction. Preferably, the limiting ribs 13 on the same width straight line are evenly spaced, so that there is a gap between two adjacent limiting ribs 13 on the same width straight line. Preferably, the limiting ribs 13 on different width straight lines are spaced and distributed in a mutually parallel manner. Preferably, the distance between two mutually parallel limiting ribs 13 is greater than the length of a single limiting rib 13, so that the second clamping member 122 and the first clamping member 121 can be effectively fitted. Similarly, the first clamping member 121 is provided with at least two limiting ribs 13 on a length straight line parallel to its length direction. Preferably, the limiting ribs 13 on the same length straight line are evenly spaced, so that there is a gap between two adjacent limiting ribs 13 on the same length straight line. Preferably, the limiting ribs 13 on different length straight lines are spaced and distributed in a mutually parallel manner. Preferably, the distance between two mutually parallel limiting ribs 13 is greater than the length of a single limiting rib 13, so that the first clamping member 121 and the second clamping member 122 can be effectively fitted. Preferably, the limiting ribs 13 on the first clamping member 121 can be inserted into the gap between the plurality of limiting ribs 13 evenly spaced on the surface of the second clamping member 122 when the first clamping member 121 and the second clamping member 122 are close to each other, so that a clamping space with a tortuous surface contour is formed between the first clamping member 121 and the second clamping member 122, so that the contact area between the clamping member 12 and the first internal body tissue is effectively increased, thereby preventing the first internal body tissue from falling off from the two oppositely arranged clamping members 12 when being pulled by the holding portion 1. In addition, the limiting ribs 13 on the surfaces of the first clamping member 121 and the second clamping member 122 are staggered, which further improves the stability of the first internal body tissue between the first clamping member 121 and the second clamping member 122, so that the first internal body tissue and the liver connected to the first internal body tissue can maintain a relatively fixed connection with the clamping member 12.The present invention provides a limiting edge 13 on the surface of the clamping member 12 so that the clamping member 12 can clamp the first internal body tissue in a more stable and effective manner, thereby facilitating the holding portion 1 to drive the first internal body tissue and the liver connected to the first internal body tissue to change position, especially increasing the force-bearing area of ​​the first internal body tissue, thereby avoiding traction damage to the first internal body tissue due to concentrated force.

[0032] Preferably, the surface of the first clamping member 121 is provided with a limiting groove 14 that can cooperate with the limiting rib 13 provided on the second clamping member 122, so that when the first clamping member 121 and the second clamping member 122 are attached to each other, the limiting rib 13 provided on the second clamping member 122 can at least partially be embedded in the limiting groove 14 provided on the first clamping member 121. Preferably, the surface of the second clamping member 122 is provided with a limiting groove 14 that can cooperate with the limiting rib 13 provided on the first clamping member 121, so that when the first clamping member 121 and the second clamping member 122 are attached to each other, the limiting rib 13 provided on the first clamping member 121 can at least partially be embedded in the limiting groove 14 provided on the second clamping member 122. Further preferably, the surface of the first clamping member 121 is provided with limiting grooves 14 spaced along the second direction in a manner consistent with the arrangement of the limiting ribs 13 on the surface of the second clamping member 122. Further preferably, the surface of the second clamping member 122 is provided with limiting grooves 14 spaced apart along the first direction in a manner consistent with the arrangement of the limiting edges 13 on the surface of the first clamping member 121. When the first clamping member 121 and the second clamping member 122 are attached to each other, the limiting edges 13 on the first clamping member 121 can cooperate with the limiting grooves 14 on the second clamping member 122, and the limiting grooves 14 on the first clamping member 121 can cooperate with the limiting edges 13 on the second clamping member 122, so that the clamping member 12 can limit the position of the first internal body tissue in a manner of increasing the contact area between the first clamping member 121, the second clamping member 122 and the first internal body tissue and changing the shape of the first internal body tissue between the first clamping member 121 and the second clamping member 122. Preferably, the setting of the limiting groove 14 can reduce the size of the gap that may exist between the first clamping member 121 and the second clamping member 122 when they are fitted together, thereby further increasing the contact area between the first internal body tissue and the clamping member 12, so that the clamping force on the first internal body tissue can be further dispersed to avoid excessive concentration of the clamping force on the first internal body tissue and causing extrusion damage. At the same time, the mutual cooperation between the limiting edge 13 and the limiting groove 14 can improve the connection stability between the first internal body tissue and the clamping member 12.

[0033] Preferably, the cross-sectional area of ​​the limiting groove 14 is greater than the cross-sectional area of ​​the limiting rib 13. When the limiting rib 13 fills the limiting groove 14, there can be extra space in the groove cavity of the limiting groove 14 for accommodating the first internal body tissue, so that the connection between the first internal body tissue and the clamping member 12 is more stable. Preferably, the surfaces of the limiting rib 13 and the limiting groove 14 can also be respectively provided with a plurality of evenly spaced protrusions and grooves, and the protrusions on the surface of the limiting rib 13 and the grooves on the surface of the limiting groove 14 match each other. When the first clamping member 121 and the second clamping member 122 fit each other, the limiting rib 13 can be filled into the limiting groove 14, and the protrusions and grooves on the surfaces of the two can further define a surface with a tortuous contour, so that the first internal body tissue clamped between the two has a larger contact area and force area.

[0034] Preferably, two engagement holes 15 for engaging with the clip applier are provided on one side of the holding portion 1 away from the clamping opening 11. Preferably, the rod bodies of the two intersecting rods of the holding portion 1 constituting the elastic double-arm clamp are respectively provided with engagement holes 15 in opposite positions, so that when the clip applier is connected to the engagement holes 15, the doctor controls the clip applier to provide an opening force for the holding portion 1, and the engagement holes 15 are used to withstand the opening force provided by the clip applier, so that the initially closed clamping opening 11 opens under the action of the opening force, and then the first body tissue to be clamped is positioned in the opened clamping opening 11. Preferably, a plurality of engagement holes 15 can be evenly spaced along the rod body axis of the rod, so that the doctor can control the opening of the clamping opening 11 with opening forces of different magnitudes. Preferably, the holding portion 1 is further provided with an elastic member 16 capable of forming a clamping force for the first internal tissue at one end away from the clamping opening 11, and the elastic member 16 can limit the shape of the holding portion 1 when there is no opening force, so that the clamping opening 11 is closed or clamps the first internal tissue under the clamping force of the elastic member 16. Preferably, the elastic member 16 can be a torsion spring connected to the ends of the two staggered rods, so that when there is no opening force, the end of the holding portion 1 away from the clamping opening 11 can be in an open shape under the action of the elastic member 16, so that the clamping opening 11 is kept in a closed state under the action of the clamping force generated by the elastic member 16.

[0035] Preferably, the surfaces of the first clamping member 121 and the second clamping member 122 are also provided with an adhesive layer 17 capable of improving the adhesion with the first internal body tissue, and the adhesive layer 17 can further limit the shape of the first internal body tissue in the closed clamping port 11. Preferably, the surfaces of the limiting edges 13 and the limiting grooves 14 are also coated with an adhesive layer 17 capable of enhancing adhesion. Preferably, the adhesive layer 17 can also be a medical material that can absorb tissue fluid and mucus flowing out of the first internal body tissue and swell to a certain extent. Preferably, the adhesive layer 17 contains a polyvinyl alcohol / sodium alginate porous composite material (PACF porous composite material). PACF with a stable double network structure is a compound of natural polysaccharide sodium alginate (SA) and polyvinyl alcohol (PVA), and is subjected to glutaraldehyde and Ca 2+ The double network structure not only makes PACF obtain excellent biocompatibility, but also makes it have the ability to promote the adhesion of blood cells, promote the rapid formation of thrombus and activate the coagulation system. It can promote rapid hemostasis through the synergistic action of multiple hemostatic mechanisms of liquid enrichment, porous effect and charge stimulation. PACF has excellent liquid-triggered self-expansion performance, with an expansion ratio of more than 2000%, and a dynamic expansion force of 3.8N can be generated during the expansion process. Preferably, the PACF porous composite material is prepared by the following method: a certain mass fraction of PVA aqueous solution is prepared, and then SA with different mass fractions (different from the mass of PVA) is added to the PVA solution to form a colloidal mixed solution, and the solution is cooled to room temperature after being mixed evenly and the state is stable. CaSO4 (1g) is dissolved in 100mL deionized water, left to stand for 30min, and then centrifuged for 5min to obtain a supernatant. A crosslinker solution (the molar ratio of solutes in PVA and crosslinker is 1.25), a small amount of catalyst solution and additives are added to the mixed solution of SA and PVA, and the stirring speed is increased at the same time. The additive forms a large number of small-diameter bubbles at a high speed, which are distributed on the surface and inside of the liquid. Under the catalytic action of the catalyst, the PVA molecules undergo a cross-linking reaction with the chemical groups of the cross-linking agent to form a viscous condensed cross-linked PVA prepolymer. Subsequently, a certain amount of calcium sulfate solution is added to the prepolymer solution. 2+It can interact with SA in the prepolymer to form SA gel. After sufficient reaction, the viscous prepolymer liquid is poured into the mold, and the porous composite material obtained by freeze drying is PACF (Polyvinylalcohol / alginate composite foam). Preferably, the adhesive layer 17 is formed into a layer membrane structure that can undergo controllable expansion in a manner of uniformly coating the unsolidified PACF on the surface of the first clamp 121 and the second clamp 122, so that when the first clamp 121 and the second clamp 122 clamp the first internal tissue, the PACF can absorb the tissue fluid and / or mucus flowing out of the first internal tissue and expand to a certain extent, so that the first clamp 121 and the second clamp 122 can clamp the first internal tissue with a greater relative force. PACF effectively eliminates mucus on the surface of the first internal body tissue by absorbing liquid and swelling, thereby increasing the friction between the first internal body tissue and the first clamp 121 and the second clamp 122, making it less likely for the first internal body tissue to move, and allowing the first clamp 121 and the second clamp 122 to more firmly define the position of the first internal body tissue.

[0036] Preferably, the PACF can be separated from the first body tissue more easily after absorbing the liquid, so as to avoid the adhesive layer 17 being firmly adhered to the tissue surface and unable to be separated from the first body tissue without tearing the first body tissue. The adhesive layer 17 can absorb the tissue fluid or mucus flowing out of the first body tissue such as the hepatogastric ligament and the omentum tissue at the edge of the hepatogastric ligament clamped by the first clamp 121 and the second clamp 122, and expand when absorbing the tissue fluid, so that the first clamp 121 and the second clamp 122 can better clamp the first body tissue. The adhesive layer 17 can remove tissue fluid or mucus on the surface of the first internal body tissue, so that the friction coefficient between the first clamp 121 and the second clamp 122 and the first internal body tissue increases, so that the first clamp 121 and the second clamp 122 can clamp the first internal body tissue more stably. In addition, the expansion of the adhesive layer 17 can compress the accommodation space of the first internal body tissue between the first clamp 121 and the second clamp 122, so that the interaction force between the first internal body tissue and the first clamp 121 and the second clamp 122 increases, thereby further limiting the relative position between the first internal body tissue and the clamp. Preferably, the accommodation space of the first internal body tissue is the gap space between the first clamp 121 and the second clamp 122.

[0037] Preferably, the retaining portion 1 is also connected to an elastic sling 2 capable of pulling the first internal body tissue clamped by the clamping port 11 away from its initial position in the patient's body. Preferably, the end of the elastic sling 2 away from the retaining portion 1 is also connected to a hanging part 3 capable of fixing the elastic sling 2 in a hanging manner on a second internal body tissue away from the liver. Preferably, the first internal body tissue may be the hepatogastric ligament and the omentum tissue at the edge of the hepatogastric ligament. Since the omentum tissue at the edge of the hepatogastric ligament is at the lower edge of the liver, the position of the liver can be changed by pulling the omentum tissue. In addition, pulling the omentum tissue can achieve the pulling effect while avoiding the damage to the organ caused by the retaining portion 1 directly clamping the liver. Preferably, the second internal body tissue may be the abdominal wall or diaphragm that can provide pulling force for the elastic sling 2 and is away from the liver. Preferably, the hanging member 3 can provide a stable pulling force for the elastic sling 2 by being connected to the abdominal wall or the diaphragm, so that the elastic sling 2 can pull the retaining portion 1 to move, thereby causing the first body tissue and the liver to change position, and then the liver moves away from above the hepatogastric space under the action of the pulling force, and the hepatogastric space can be directly exposed to the doctor's field of vision, making it convenient for the doctor to treat the tissue structure of the hepatogastric space.

[0038] Preferably, when the clamping port 11 clamps the first body tissue, the doctor adjusts the hanging position of the hanging member 3 according to the stretching parameter of the elastic sling 2 and the position of the second body tissue, so that the first body tissue and the left lobe of the liver leave the hepatogastric space under the pulling action of the elastic sling 2. Preferably, a connecting unit 4 capable of limiting the position of the elastic sling 2 on the elastic member 16 is also provided on the elastic member 16 of the holding portion 1, and the connecting unit 4 can pull the elastic sling 2 to move on the ring body of the elastic member 16 under the operation of the doctor, thereby changing the direction of the pulling force provided by the elastic sling 2. Preferably, the stretching parameters of the elastic sling 2 can include its own length, its own tension and the angle between it and the holding portion 1. Preferably, the connecting unit 4 can be a connecting ring sleeved on the ring body of the elastic member 16. Further preferably, the connecting unit 4 can also be set as a connecting structure that can move on the ring body of the elastic member 16, and in particular, the connecting unit 4 can also adjust the pulling direction of the elastic sling 2.

[0039] Example 2

[0040] This embodiment is a further improvement on Embodiment 1, and the repeated contents will not be repeated here.

[0041] Preferably, the method of using the liver suspension device is as follows:

[0042] (1) Place the liver suspension device into the abdominal cavity through laparoscopy.

[0043] (2) The clip applier is engaged with the engagement hole 15 of the liver suspension device, and the clip applier is used to transmit an opening force to the holding portion 1 of the liver suspension device, so that the clamping opening 11 in the closed state is opened.

[0044] (3) The first internal body tissue is clamped by the clamping opening 11, and the elastic sling 2 connected to the retaining portion 1 is fixed in a hanging manner on a second internal body tissue away from the liver, so that the first internal body tissue and the left lobe of the liver are pulled away from the hepatogastric space by the elastic sling 2.

[0045] (4) The connecting unit 4 adjusts the direction and length of the pulling force provided by the elastic sling 2 according to the detected stretching parameters of the elastic sling 2, thereby maintaining the hepatogastric space in an exposed state.

[0046] It should be noted that the above specific embodiments are exemplary, and those skilled in the art can come up with various solutions inspired by the disclosure of the present invention, and these solutions also belong to the disclosure scope of the present invention and fall within the protection scope of the present invention. Those skilled in the art should understand that the present specification and its drawings are illustrative and do not constitute a limitation on the claims. The scope of protection of the present invention is defined by the claims and their equivalents. Throughout the text, the features guided by "preferably" are only an optional method and should not be understood as having to be set, so the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. A laparoscopic liver suspension device, comprising at least a holding portion (1), characterized in that: The holding portion (1) is clamped and positioned on a first internal tissue of the patient through a clamping opening (11); the holding portion (1) is constructed as an elastic double-arm clamp structure; the elastic double-arm clamp constructed by the holding portion (1) is also connected to an elastic sling (2) at one end away from the clamping opening (11) and capable of pulling the first internal tissue clamped by the clamping opening (11) away from its initial position in the patient's body, and the elastic sling (2) is also connected to a hanging member (3) at one end away from the holding portion (1) and capable of hanging and positioning the elastic sling (2) on a second internal tissue away from the liver; Under the action of external force, the holding portion (1) pulls the first internal tissue clamped by it to move; when the clamping opening (11) clamps the first internal tissue, the doctor adjusts the hanging position of the hanging member (3) according to the stretching parameter of the elastic sling (2) and the position of the second internal tissue, so that the first internal tissue and the left lobe of the liver leave the liver-stomach gap under the pulling action of the elastic sling (2); The clamping opening (11) is provided with a clamping member (12) on its clamping surface in such a manner that the position of the first internal body tissue can be limited while maintaining the shape of the first internal body tissue, wherein at least two of the clamping members (12) are respectively provided on two opposite clamping surfaces of the clamping opening (11) in contact with the first internal body tissue; The clamping member (12) is provided with a limiting edge (13) on its surface in such a manner that it can limit the position of the first body tissue clamped by the clamping opening (11), wherein: The clamping member (12) comprises a first clamping member (121) and a second clamping member (122) capable of limiting the position of the first body tissue located in the clamping opening (11); The limiting edges (13) are arranged at intervals on the surface of the first clamping member (121) along the first direction, and the limiting edges (13) are also arranged at intervals on the surface of the second clamping member (122) along the second direction. When the clamping opening (11) is closed, the first clamping member (121) and the second clamping member (122) fit together in a manner such that the limiting edges (13) arranged on the surfaces of the two members are staggered with each other, thereby clamping the first internal body tissue.

2. The laparoscopic liver suspension device according to claim 1, characterized in that: The surfaces of the first clamping member (121) and the second clamping member (122) are respectively provided with limiting grooves (14) capable of cooperating with the limiting edges (13), wherein: The surface of the first clamping member (121) is provided with the limiting grooves (14) spaced apart along the second direction in a manner consistent with the arrangement of the limiting edges (13) on the surface of the second clamping member (122); The surface of the second clamping member (122) is provided with the limiting grooves (14) spaced apart along a first direction in a manner consistent with the arrangement of the limiting edges (13) on the surface of the first clamping member (121).

3. The laparoscopic liver suspension device according to claim 2, characterized in that: When the first clamping member (121) and the second clamping member (122) are in contact with each other, the limiting edge (13) on the first clamping member (121) can cooperate with the limiting groove (14) on the second clamping member (122), and the limiting groove (14) on the first clamping member (121) can cooperate with the limiting edge (13) on the second clamping member (122), so that the clamping member (12) can limit the position of the first internal tissue in a manner of increasing the contact area between the first clamping member (121), the second clamping member (122) and the first internal tissue and changing the clamping form of the first clamping member (121) and the second clamping member (122) on the first internal tissue.

4. The laparoscopic liver suspension device according to claim 3, characterized in that: At least one engagement hole (15) for engaging with a clip applier is provided on a side of the retaining portion (1) away from the clamping opening (11); the engagement hole (15) is used to withstand an opening force provided by the clip applier, thereby opening the clamping opening (11); The retaining portion (1) is further provided with an elastic member (16) capable of generating a clamping force against the first internal body tissue at one end away from the clamping opening (11); the elastic member (16) is capable of limiting the shape of the retaining portion (1) when there is no opening force, so that the clamping opening (11) is closed or clamps the first internal body tissue under the clamping force of the elastic member (16).

5. The laparoscopic liver suspension device according to claim 4, characterized in that: A connection unit (4) capable of limiting the position of the elastic sling (2) on the elastic member (16) is also provided on the elastic member (1) of the retaining portion (1). The connection unit (4) can pull the elastic sling (2) to move on the ring body of the elastic member (16) under the operation of a doctor, thereby changing the direction of the pulling force provided by the elastic sling (2).

6. The laparoscopic liver suspension device according to claim 5, characterized in that: The surfaces of the first clamping member (121) and the second clamping member (122) are also provided with an adhesive layer (17) capable of improving the adhesion between the first internal body tissue and the adhesive layer (17) can further limit the shape of the first internal body tissue in the closed clamping port (11) by expanding due to liquid absorption and compressing the accommodation space of the first internal body tissue.

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