阅读说明：本技术 一种b超引导下肝段切除术用辅助装置 (Auxiliary device for B-ultrasonic guided hepatectomy ) 是由 张健 李韧 李小鹏 马师洋 于 2021-07-21 设计创作，主要内容包括：本发明公开了一种B超引导下肝段切除术用辅助装置,包括直套筒、内套筒、记忆钢针和阻断绳；所述记忆钢针的前端为U型结构,所述记忆钢针的尾端固设有第一安装座；所述内套筒的尾端固设有第二安装座；所述第二安装座的顶部设有安装槽,所述第一安装座位于所述安装槽内,且所述第一安装座与所述第二安装座之间可拆卸连接,所述记忆钢针贯穿所述内套筒的底部,且所述记忆钢针可拆卸套设在所述内套筒内；所述内套筒采用柔性材质；所述直套筒与所述阻断绳均与所述第二安装座可拆卸连接；所述阻断绳与所述内套筒相匹配,所述阻断绳也采用柔性材质。本发明在B超引导下能够对肝切除术中所要切除的肝段入肝血流进行阻断,防止肝段切除过程中出现大出血。(The invention discloses an auxiliary device for a B-ultrasonic guided lower hepatic resection, which comprises a straight sleeve, an inner sleeve, a memory steel needle and a blocking rope, wherein the straight sleeve is provided with a first end and a second end; the front end of the memory steel needle is of a U-shaped structure, and the tail end of the memory steel needle is fixedly provided with a first mounting seat; a second mounting seat is fixedly arranged at the tail end of the inner sleeve; the top of the second mounting seat is provided with a mounting groove, the first mounting seat is positioned in the mounting groove, the first mounting seat and the second mounting seat are detachably connected, the memory steel needle penetrates through the bottom of the inner sleeve, and the memory steel needle is detachably sleeved in the inner sleeve; the inner sleeve is made of flexible materials; the straight sleeve and the blocking rope are detachably connected with the second mounting seat; the blocking rope is matched with the inner sleeve and is made of flexible materials. The invention can block the hepatic blood flow of the hepatic segment to be resected in the hepatectomy under the guidance of B-ultrasonic, and prevent the occurrence of major hemorrhage in the hepatectomy.)

1. An auxiliary device for B ultrasonic guided hepatectomy is characterized in that: comprises a straight sleeve (1), an inner sleeve (2), a memory steel needle (3) and a blocking rope (4);

the front end of the memory steel needle (3) is of a U-shaped structure, and the tail end of the memory steel needle (3) is fixedly provided with a first mounting seat (5); a second mounting seat (6) is fixedly arranged at the tail end of the inner sleeve (2);

a mounting groove (8) is formed in the top of the second mounting seat (6), the first mounting seat (5) is located in the mounting groove (8), the first mounting seat (5) is detachably connected with the second mounting seat (6), the memory steel needle (3) penetrates through the bottom of the second mounting seat (6), and the memory steel needle (3) is detachably sleeved in the inner sleeve (2); the inner sleeve (2) is made of flexible materials;

the straight sleeve (1) and the blocking rope (4) are detachably arranged on the second mounting seat (6); the straight sleeve (1) is of a hollow structure, and the inner diameter of the straight sleeve (1) is matched with the outer diameter of the inner sleeve (2);

the blocking rope (4) is matched with the inner sleeve (2), and the blocking rope (4) is also made of flexible materials.

2. The auxiliary device for B-ultrasonic guided hepatectomy according to claim 1, wherein: a mounting cavity (9) is formed in the center of the interior of the first mounting seat (5), a support (10) is fixedly arranged in the mounting cavity (9), and a supporting plate (11) is fixedly arranged at the top of the support (10);

two vertical limiting assemblies are symmetrically arranged on two sides of the supporting plate (11), each vertical limiting assembly comprises a pressing rod (12), the top of each pressing rod (12) penetrates through the top of the corresponding first mounting seat (5), a square rod (13) is fixedly arranged at the bottom of each pressing rod (12), a sleeve (14) is rotatably sleeved outside each square rod (13), a circle of first sliding groove (15) is formed in the periphery of each sleeve (14), supporting rods (16) are fixedly arranged on the side wall of the mounting cavity (9) and the position, corresponding to the first sliding groove (15), of each support (10), one end of each supporting rod (16) is fixedly connected with the side wall of the corresponding mounting cavity (9) or the corresponding support (10), and the other end of each supporting rod (16) is slidably connected with the corresponding first sliding groove (15);

a connecting cylinder (17) is fixedly arranged at the bottom of the sleeve (14), the connecting cylinder (17) is of a hollow structure, the bottom of the square rod (13) is positioned in the connecting cylinder (17), a second threaded rod (18) is connected to the connecting cylinder (17) in an internal thread manner, the bottom of the second threaded rod (18) penetrates through the bottom of the connecting cylinder (17), a first threaded hole (19) for the second threaded rod (18) to penetrate through is formed in the bottom of the first mounting seat (5), and a first threaded groove (20) matched with the first threaded hole (19) is formed in the bottom of the mounting groove (8); a cross rod (28) is fixedly arranged between the tops of the two pressure rods (12).

3. The auxiliary device for B-ultrasonic guided hepatectomy according to claim 2, wherein: the sleeve (14) is of a hollow structure, racks (21) are arranged on the left side surface and the right side surface of the square rod (13), driving gears (22) are arranged on the left side and the right side of the square rod (13), and the driving gears (22) are meshed with the racks (21) on the side surfaces of the corresponding square rod (13);

a first rotating shaft (31) is fixedly arranged at the center of each driving gear (22), a first bevel gear (32) is fixedly arranged on each first rotating shaft (31), a second bevel gear (33) is arranged at the bottom of each first bevel gear (32) in a meshed manner, and a second rotating shaft (34) is fixedly arranged at the center of each second bevel gear (33);

one of them the below of second bevel gear (33) is equipped with first driven gear (35), first driven gear (35) fixed cover is established on second pivot (34), first driven gear (35) are close to one side meshing of sleeve (14) inside wall is provided with second driven gear (36), be equipped with on the inside wall of sleeve (14) the round with tooth (37) that second driven gear (36) engaged with, the center of second driven gear (36) has set firmly third pivot (46).

4. The auxiliary device for B-ultrasonic guided hepatectomy according to claim 3, wherein: the top of the second threaded rod (18) is fixedly provided with two telescopic rods (38), the two telescopic rods (38) are symmetrically arranged on two sides of the square rod (13), the top of each telescopic rod (38) is located in the sleeve (14), the top of each telescopic rod (38) is fixedly provided with a mounting plate (39), a square rod through hole (40) for the square rod (13) to pass through is formed in the center of each mounting plate (39), each mounting plate (39) is rotatably connected with the inner side wall of the sleeve (14), and a circle of rotating groove (41) matched with the edge of each mounting plate (39) is formed in the inner side wall of the sleeve (14);

the bottoms of the two second rotating shafts (34) and the third rotating shaft (46) are rotatably connected with the mounting plate (39).

5. The auxiliary device for B-ultrasonic guided hepatectomy according to claim 4, wherein: two ball grooves (42) have been seted up to the equal symmetry in top and the bottom of mounting panel (39), every equal activity is equipped with ball (43) in ball groove (42), round second sliding tray (44) have all been seted up on the top side of rotating groove (41) and the bottom flank, some of ball (43) are located rather than the ball groove (42) that corresponds, another part of ball (43) is located rather than corresponding in second sliding tray (44).

6. The auxiliary device for B-ultrasonic guided hepatectomy according to claim 2, wherein: the two sliding blocks (23) are connected to the supporting plate (11) in a sliding manner, and the two sliding blocks (23) are respectively connected with the corresponding vertical limiting assemblies;

a transverse limiting rod (24) is arranged on one side surface of each sliding block (23) close to the corresponding square rod (13), the square rod (13) penetrates through the transverse limiting rod (24), and a strip-shaped second through hole (25) is formed in the transverse limiting rod (24); and a limiting groove (26) corresponding to the transverse limiting rod (24) is formed in the side surface of the mounting groove (8).

A first connecting rod (27) is movably connected between the sliding block (23) and the corresponding pressure rod (12).

7. The auxiliary device for B-ultrasonic guided hepatectomy according to claim 2, wherein: the top of the first mounting seat (5) is provided with a handle (29), and the handle (29) is positioned below the cross rod (28).

8. The auxiliary device for B-ultrasonic guided hepatectomy according to claim 1, wherein: the front end of the straight sleeve (1) is of an inclined plane structure, and a thin film (30) is fixedly arranged at an opening at the front end of the straight sleeve (1).

Technical Field

The invention relates to the technical field of medical instruments, in particular to an auxiliary device for B-ultrasonic guided hepatectomy.

Background

Liver resection is used for surgical treatment of hepatobiliary calculus, and liver part is used for removing and treating hepatobiliary calculus, and the hepatobiliary calculus is firstly created by the professor of Huangzhiqiang in 1958. The practice of more than 40 years proves that the hepatic subtotal resection is used for hepatobiliary calculus, has double effects of relieving hepatic duct obstruction (calculus, particularly the complicated hepatobiliary stricture) and removing pyogenic infection focuses, and effectively improves the long-term treatment effect of hepatobiliary calculus in China.

When performing liver resection, the control of liver blood flow is performed in advance to prevent massive hemorrhage during resection. There are three existing methods of hepatic blood flow control: dissecting the hepatic portal to block the hepatic blood flow of the left and right half livers at the left and right corners of the transverse hepatic fissure to control most of bleeding when the left and right hepatic segments are excised; the method generally employs intravenous injection of indocyanine green under B-ultrasound guidance to demarcate the hepatic segment to be resected, but the method does not fundamentally block the vein or the hepatic pedicle; ② the hepatic blood flow of the hepatic valve part is blocked intermittently, and the time can be about 20min for a patient without liver cirrhosis; the method has strict requirements on operation time, the prevention of hepatic portal blood flow entering the liver is required to be removed after 20min, the hepatic portal blood flow is blocked again for operation after about 10min, and the operation time is prolonged; and thirdly, the improved whole-liver blood flow block is only applied to the resection of the VII and VIII sections of the liver and is not applicable to the resection of other liver sections.

Disclosure of Invention

In view of the above problems, the present invention is directed to provide an auxiliary device for hepatectomy under B-ultrasound guidance, which can block the hepatic blood flow entering the liver to be resected in hepatectomy under B-ultrasound guidance, prevent the occurrence of massive hemorrhage during hepatectomy, and is suitable for resecting all liver segments.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

an auxiliary device for B ultrasonic guided hepatectomy is characterized in that: comprises a straight sleeve, an inner sleeve, a memory steel needle and a blocking rope;

the front end of the memory steel needle is of a U-shaped structure, and the tail end of the memory steel needle is fixedly provided with a first mounting seat; a second mounting seat is fixedly arranged at the tail end of the inner sleeve;

the top of the second mounting seat is provided with a mounting groove, the first mounting seat is positioned in the mounting groove, the first mounting seat and the second mounting seat are detachably connected, the memory steel needle penetrates through the bottom of the second mounting seat, and the memory steel needle is detachably sleeved in the inner sleeve; the inner sleeve is made of flexible materials;

the straight sleeve and the blocking rope are detachably arranged on the second mounting seat; the straight sleeve is of a hollow structure, and the inner diameter of the straight sleeve is matched with the outer diameter of the inner sleeve;

the blocking rope is matched with the inner sleeve and is made of flexible materials.

Furthermore, an installation cavity is formed in the center of the interior of the first installation seat, a support is fixedly arranged in the installation cavity, and a support plate is fixedly arranged at the top of the support;

two vertical limiting assemblies are symmetrically arranged on two sides of the supporting plate, each vertical limiting assembly comprises a pressing rod, the top of each pressing rod penetrates through the top of the corresponding first mounting seat, a square rod is fixedly arranged at the bottom of each pressing rod, a sleeve is rotatably sleeved outside each square rod, a circle of first sliding groove is formed in the periphery of each sleeve, supporting rods are fixedly arranged on the side wall of the mounting cavity and the corresponding position of the corresponding first sliding groove on the corresponding support, one end of each supporting rod is fixedly connected with the corresponding side wall of the mounting cavity or the corresponding support, and the other end of each supporting rod is slidably connected with the corresponding first sliding groove;

a connecting cylinder is fixedly arranged at the bottom of the sleeve, the connecting cylinder is of a hollow structure, the bottom of the square rod is positioned in the connecting cylinder, a second threaded rod is connected with the connecting cylinder in an internal thread manner, the bottom of the second threaded rod penetrates through the bottom of the connecting cylinder, a first threaded hole for the second threaded rod to penetrate through is formed in the bottom of the first mounting seat, and a first threaded groove matched with the first threaded hole is formed in the bottom of the mounting groove; and a cross rod is fixedly arranged between the tops of the two pressure rods.

Furthermore, the sleeve is of a hollow structure, racks are arranged on the left side surface and the right side surface of the square rod, driving gears are arranged on the left side and the right side of the square rod, and the driving gears are meshed with the racks on the side surfaces of the square rod corresponding to the driving gears;

a first rotating shaft is fixedly arranged at the center of each driving gear, a first bevel gear is fixedly arranged on the first rotating shaft, a second bevel gear is meshed with the bottom of the first bevel gear, and a second rotating shaft is fixedly arranged at the center of the second bevel gear;

one of them second bevel gear's below is equipped with first driven gear, first driven gear fixed cover is established in the second pivot, first driven gear is close to one side meshing of sleeve inside wall is provided with second driven gear, be equipped with on the telescopic inside wall the round with second driven gear engaged with tooth, second driven gear's center has set firmly the third pivot.

Furthermore, two telescopic rods are fixedly arranged at the top of the second threaded rod and symmetrically arranged on two sides of the square rod, the top of each telescopic rod is positioned in the sleeve, an installation plate is fixedly arranged at the top of each telescopic rod, a square rod through hole for the square rod to pass through is formed in the center of the installation plate, the installation plate is rotatably connected with the inner side wall of the sleeve, and a circle of rotating groove matched with the edge of the installation plate is formed in the inner side wall of the sleeve;

two the bottom of second pivot, and the third pivot all with the mounting panel is rotated and is connected.

Further, two ball grooves are symmetrically formed in the top and the bottom of the mounting plate, each ball groove is internally and movably provided with a ball, a circle of second sliding groove is formed in the top side face and the bottom side face of each rotating groove, one part of each ball is located in the corresponding ball groove, and the other part of each ball is located in the corresponding second sliding groove.

Furthermore, the supporting plate is connected with two sliding blocks in a sliding manner, and the two sliding blocks are respectively connected with the corresponding vertical limiting assemblies;

a transverse limiting rod is arranged on one side surface, close to the corresponding square rod, of each sliding block, the square rod penetrates through the transverse limiting rods, and strip-shaped second through holes are formed in the transverse limiting rods; and the side surface of the mounting groove is provided with a limiting groove corresponding to the transverse limiting rod.

And a first connecting rod is movably connected between the sliding block and the corresponding pressure rod.

Furthermore, a handle is arranged at the top of the first mounting seat and is positioned below the cross rod.

Furthermore, the front end of the straight sleeve is of an inclined plane structure, and a thin film is fixedly arranged at an opening at the front end of the straight sleeve.

The invention has the beneficial effects that: compared with the prior art, the invention has the improvement that,

1. the auxiliary device for the hepatectomy is characterized in that a straight sleeve, an inner sleeve, a memory steel needle and a blocking rope are alternately used, the memory performance of the memory steel needle is utilized, a finger sleeve is inserted into a vein blood vessel to be blocked or beside a liver pedicle under the guidance of B-ultrasound, then the memory steel needle and the inner sleeve are inserted into the vein blood vessel to be blocked or beside the liver pedicle through the straight sleeve, after the front ends of the memory steel needle and the inner sleeve extend out of the front end of the straight sleeve, the front end of the memory steel needle bypasses the vein blood vessel to be blocked or the liver pedicle to form a U-shaped structure under the memory characteristic, the inner sleeve is bent into a U-shaped structure, the memory steel needle is pulled out, the blocking rope is inserted into the inner sleeve to block the vein blood vessel to be blocked or the liver pedicle, the risk of the hepatectomy can be effectively reduced, and the auxiliary device is suitable for cutting all liver segments.

2. According to the invention, the tail end of the memory steel needle is fixedly provided with the first mounting seat, the tail end of the inner sleeve is fixedly provided with the second mounting seat, the first mounting seat is sleeved in the second mounting seat, and the first mounting seat is detachably connected with the second mounting seat, so that the memory steel needle and the inner sleeve can be ensured to be synchronously inserted into hepatic tissue under the condition that the first mounting seat and the second mounting seat are fixedly locked, and the memory steel needle can effectively drive the inner sleeve to be bent; under the condition that first mount pad and second mount pad relieved the locking, can convenient and fast pull out memory steel needle from the inner skleeve, do not influence the effect of inner skleeve.

3. According to the detachable connecting structure of the first mounting seat and the second mounting seat, the operation is simple when the detachable connecting structure is detached, the press rod moves downwards in the process of pressing the cross rod to drive the transverse limiting rod to withdraw from the limiting groove, meanwhile, the press rod pushes the sleeve to rotate in the downward moving process to drive the second threaded rod to withdraw from the first threaded groove, the fixed limit between the second mounting seat and the first mounting seat is released from the longitudinal direction and the transverse direction, the operation is very simple, only the cross rod needs to be pressed, one person can easily and quickly complete the operation, and the operation time is saved.

Drawings

FIG. 1 is a schematic view showing the structure of a straight sleeve, an inner sleeve, a memory steel needle and a blocking rope in the auxiliary device for B-ultrasonic guided hepatectomy.

Fig. 2 is a schematic view of a connection relationship between the first and second mounting seats in a fixed state according to the present invention.

Fig. 3 is a schematic view of the connection relationship between the first and second mounting seats when the first and second mounting seats are released from the fixed state.

FIG. 4 is a schematic view of the overall structure of the inner sleeve and the second mounting seat of the present invention.

FIG. 5 is a schematic view of the overall structure of the memory steel needle and the first mounting seat of the present invention.

FIG. 6 is a partial enlarged view of the structure of portion A of FIG. 5 according to the present invention.

FIG. 7 is a front view of the connection structure between the sleeve and the square bar according to the present invention.

FIG. 8 is a partial enlarged view of the structure of portion B of FIG. 7 according to the present invention.

FIG. 9 is a side view of the connection structure between the sleeve and the square bar according to the present invention.

Fig. 10 is a top view of the position relationship between the sleeve and the second driven wheel of the present invention.

FIG. 11 is a top view of a lateral restraint bar structure of the present invention.

Wherein: 1-straight sleeve, 2-inner sleeve, 3-memory steel needle, 4-blocking rope, 5-first mounting seat, 6-second mounting seat, 7-first through hole, 8-mounting groove, 9-mounting cavity, 10-bracket, 11-support plate, 12-pressure rod, 13-square rod, 14-sleeve, 15-first sliding groove, 16-support rod, 17-connecting cylinder, 18-second threaded rod, 19-first threaded hole, 20-first threaded groove, 21-rack, 22-driving wheel, 23-sliding block, 24-transverse limiting rod, 25-second through hole, 26-limiting groove, 27-first connecting rod, 28-cross rod, 29-handle, 30-film, 31-first rotating shaft, 32-a first bevel gear, 33-a second bevel gear, 34-a second rotating shaft, 35-a first driven wheel, 36-a second driven wheel, 37-teeth, 38-a telescopic rod, 39-a mounting plate, 40-a square rod through hole, 41-a rotating groove, 42-a ball groove, 43-a ball, 44-a second sliding groove, 45-a limiting plate, 46-a third rotating shaft, 47-a straight sleeve jack and 48-a blocking rope jack.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following further describes the technical solution of the present invention with reference to the drawings and the embodiments.

Referring to fig. 1-11, the auxiliary device for B-ultrasonic guided hepatectomy comprises a straight sleeve 1, an inner sleeve 2, a memory steel needle 3 and a blocking rope 4;

the front end of the memory steel needle 3 is of a U-shaped structure, and the tail end of the memory steel needle 3 is fixedly provided with a first mounting seat 5; a second mounting seat 6 is fixedly arranged at the tail end of the inner sleeve 2, a mounting groove 8 is formed in the top of the second mounting seat 6, the first mounting seat 5 is located in the mounting groove 8, and the first mounting seat 5 is detachably connected with the second mounting seat 6; the memory steel needle 3 penetrates through the bottom of the second mounting seat 6; and a first through hole 7 for the memory steel needle 3 to pass through is formed in the bottom of the second mounting seat 6.

The inner sleeve 2 is of a hollow structure, and the inner sleeve 2 is made of flexible materials; the memory steel needle 3 is detachably sleeved in the inner sleeve 2, the inner diameter of the inner sleeve 2 is matched with the diameter of the memory steel needle 3, the memory steel needle 3 can be inserted into the inner sleeve 2, and the memory steel needle 3 cannot move in the inner sleeve 2 under the action of no external force; the front end of the memory steel needle 3 is of a U-shaped structure, the memory steel needle 3 can be straightened under the action of external force, the U-shaped structure can be restored at the front end of the memory steel needle under the action of no external force, and when the memory steel needle 3 is inserted into the inner sleeve 2, the inner sleeve 2 is made of flexible materials and can deform along with the deformation of the front end of the memory steel needle 3.

The straight sleeve 1 and the blocking rope 4 are detachably arranged on the second mounting seat 6, and a straight sleeve jack 47 for inserting the straight sleeve 1 and a blocking rope jack 48 for inserting the blocking rope 4 are arranged on the second mounting seat 6. The straight sleeve 1 is of a hollow structure; the front end of the straight sleeve 1 is of an inclined plane structure, a film 30 is fixedly arranged at an opening at the front end of the straight sleeve 1, and the film 30 seals the opening at the front end of the straight sleeve 1; the front end of the straight sleeve 1 is of an inclined plane structure so as to facilitate puncture of the liver segment, and the film 30 at the opening at the front end of the straight sleeve 1 can prevent part of liver tissues from being extruded into the straight sleeve 1 in the process of puncturing the liver segment.

The external diameter of inner skleeve 2 with straight sleeve 1's internal diameter phase-match guarantees inner skleeve 2 can insert in straight sleeve 1, and insert back inner skleeve 2 the lateral wall with straight sleeve 1's inboard wall laminates mutually, and straight sleeve 1 can restrict inner skleeve 2, avoids inner skleeve 2 to take place to buckle in straight sleeve 1.

The blocking rope 4 is matched with the inner sleeve 2, and the blocking rope 4 is made of flexible materials, particularly bendable thin steel wires; the blocking rope 4 can be inserted into the inner sleeve 2 to replace the memory steel needle 3 in the inner sleeve 2.

The front end part of the memory steel needle 3 is of a conical structure, the front end shape of the inner sleeve 2 is matched with the front end shape of the memory steel needle 3,

when the device is used, the straight sleeve 1 and the blocking rope 4 are firstly pulled out from the second mounting seat 6, then the straight sleeve 1 is firstly punctured to the vein vessel or the side of the hepatic pedicle corresponding to the hepatic segment to be cut off under the guidance of B-ultrasound, then the memory steel needle 3 is pulled to be inserted into the inner sleeve 2, the front end of the inner sleeve 2 deforms along with the front end of the memory steel needle 3, so that the integral front end of the inner sleeve 2 and the memory steel needle 3 forms a U-shaped structure, at the moment, the integral front end of the inner sleeve 2 and the memory steel needle 3 is pulled straight and inserted into the straight sleeve 1 and slowly pushed forwards, when the front ends of the memory steel needle 3 and the inner sleeve 2 contact with the film 30 at the front end of the straight sleeve 1, the film 30 is punctured by the front end of the memory steel needle 3, the integral front end of the memory steel needle 3 and the inner sleeve 2 penetrates out from the front end of the straight sleeve 1, and the front end of the memory steel needle 3 recovers deformation under the condition that the memory steel needle 3 is not limited by the straight sleeve 1, the memory steel needle 3 and the inner sleeve 2 are driven to form a U-shaped structure at the integral front end and bypass the vein or the hepatic pedicle to be blocked; at the moment, the straight sleeve 1 is withdrawn from the outside of the inner sleeve 2, the memory steel needle 3 is withdrawn from the inner sleeve 2, only the inner sleeve 2 is left to be punctured inside the hepatic segment, the blocking rope 4 penetrates from an opening at the tail end of the inner sleeve 2, the blocking rope 4 is bent along the trend of the inner sleeve 2, when the front end of the blocking rope 4 penetrates out of the front end of the inner sleeve 2, the blocking rope 4 is not limited by the inner sleeve 2, the front end of the blocking rope continues to puncture the hepatic segment, when the front end of the blocking rope 4 penetrates out of the surface of the hepatic segment, the front end and the tail end of the blocking rope 4 are both positioned on the surface of the hepatic segment, the bending part at the bottom of the blocking rope 4 is positioned at the bottom of a vein or a hepatic pedicle to be blocked, the blood flow of the vein or the hepatic pedicle to be blocked can be blocked by pulling the blocking rope 4, and the condition of heavy bleeding in the hepatic segment resection is prevented.

Specifically, an installation cavity 9 is arranged at the center of the interior of the first installation seat 5, a support 10 is fixedly arranged in the installation cavity 9, and a support plate 11 is fixedly arranged at the top of the support 10;

two vertical limiting assemblies are symmetrically arranged on two sides of the supporting plate 11 and comprise pressing rods 12, the tops of the pressing rods 12 penetrate through the tops of the first mounting seats 5, and cross rods 28 are fixedly arranged between the tops of the pressing rods 12. A square rod 13 is fixedly arranged at the bottom of the pressure rod 12, a sleeve 14 is rotatably sleeved outside the square rod 13, a circle of first sliding groove 15 is formed in the periphery of the sleeve 14, a support rod 16 is fixedly arranged on the side wall of the installation cavity 9 and the position, corresponding to the first sliding groove 15, of the support 10, one end of the support rod 16 is fixedly connected with the side wall of the installation cavity 9 or the support 10 corresponding to the support rod, and the other end of the support rod 16 is slidably connected with the first sliding groove 15;

the bottom of sleeve 14 has set firmly connecting cylinder 17, connecting cylinder 17 is hollow structure, the bottom of square bar 13 is located in connecting cylinder 17, connecting cylinder 17 internal thread connection has second threaded rod 18, the bottom of second threaded rod 18 is run through the bottom of connecting cylinder 17, the bottom of first mount pad 5 is seted up be used for first screw hole 19 that second threaded rod 18 passed, the bottom of mounting groove 8 seted up with first screw hole 19 assorted first thread groove 20.

Further, the sleeve 14 is of a hollow structure, racks 21 are arranged on the left side surface and the right side surface of the square rod 13, driving gears 22 are arranged on the left side and the right side of the square rod 13, and the driving gears 22 are meshed with the racks 21 on the side surfaces of the square rod 13 corresponding to the driving gears 22;

a first rotating shaft 31 is fixedly arranged at the center of each driving gear 22, a first bevel gear 32 is fixedly arranged on the first rotating shaft 31, that is, the driving gear 22 and the first bevel gear 32 are fixedly sleeved on the first rotating shaft 31, and limiting plates 45 are fixedly arranged at two ends of the first rotating shaft 31; a second bevel gear 33 is meshed with the bottom of the first bevel gear 32, and a second rotating shaft 34 is fixedly arranged at the center of the second bevel gear 33;

one of them the below of second bevel gear 33 is equipped with first driven gear 35, first driven gear 35 fixed cover is established on second pivot 34, promptly second bevel gear 33 and first driven gear 35 all fixed cover are established on second pivot 34, first driven gear 35 is close to one side meshing of sleeve 14 inside wall is provided with second driven gear 36, be equipped with the round on the inside wall of sleeve 14 with second driven gear 36 engaged with tooth 37. When the pressure lever 12 is pressed downwards, the square rod 13 moves downwards, the driving gear 22 is driven to rotate under the meshing action of the rack 21 and the driving gear 22, and the two driving gears 22 can ensure the stability of the square rod 13; the driving gear 22 rotates to drive the first rotating shaft 31 and the first bevel gear 32 to rotate, the first bevel gear 32 drives the second bevel gear 33 to rotate, and the rotation of the first bevel gear 32 in the vertical direction is converted into the rotation of the first bevel gear in the horizontal direction;

second bevel gear 33 rotates and drives second pivot 34 and rotate, second pivot 34 that is equipped with first driven gear 35 can drive first driven gear 35 and rotate when rotating, first driven gear 35 rotates and drives second driven gear 36 and rotate, second driven gear 36 drives sleeve 14 and rotates to realized when pushing down depression bar 12, sleeve 14 takes place to rotate, sleeve 14 rotates and drives connecting cylinder 17 and rotate, thereby drives second threaded rod 18 and reciprocates.

Further, two telescopic links 38 have been set firmly at the top of second threaded rod 18, two telescopic link 38 symmetry sets up the both sides of square bar 13, just telescopic link 38's top is located in sleeve 14, two telescopic link 38's top has set firmly mounting panel 39, mounting panel 39's center is equipped with and is used for square bar through-hole 40 that square bar 13 passed through, mounting panel 39 with sleeve 14's inside wall rotates and is connected, seted up on sleeve 14's the inside wall the round with mounting panel 39 edge assorted rotates groove 41. The mounting panel 39 is used for the first driven gear 35 of erection bracing and second driven gear 36 to make the bottom sprag structure of whole gear system, the bottom of the second pivot 34 that is equipped with first driven gear 35 runs through behind first driven gear 35 through the bearing with mounting panel 36 rotates, and another second pivot 34 directly rotates through bearing and mounting panel 36 and is connected, the center of second driven gear 36 has set firmly third pivot 46, the bottom of third pivot 46 also through the bearing with mounting panel 36 rotates and is connected. The sleeve 14 can drive the second threaded rod 18 to move up and down in the rotating process, but the second threaded rod 18 cannot rotate, so that the mounting plate 39 is limited, the mounting plate 39 is prevented from rotating, and the rotating groove 41 in the inner side wall of the sleeve 14 enables the mounting plate 39 not to influence the rotation of the sleeve 41; the height of the rotating groove 41 cannot be changed because the sleeve 14 only rotates and cannot move up and down, the height difference between the top of the second threaded rod 18 and the rotating groove 41 can be changed along with the height difference during the up-and-down movement of the second threaded rod, and the telescopic rod 38 can meet the height change between the second threaded rod 18 and the rotating groove 41, so that the mounting plate 39 is stably supported.

Further, two ball grooves 42 are symmetrically formed in the top and the bottom of the mounting plate 39, a ball 43 is movably arranged in each ball groove 42, a circle of second sliding groove 44 is formed in the top side surface and the bottom side surface of the rotating groove 41, one part of each ball 43 is located in the corresponding ball groove 42, and the other part of each ball 43 is located in the corresponding second sliding groove 44. The second threaded rod 18 can generate certain pulling force or upward jacking force on the mounting plate 39 in the process of moving up and down, so that the bottom or the top of the mounting plate 39 and the bottom or the top of the rotating groove 41 are mutually extruded, and the friction force between the mounting plate 39 and the rotating groove 41 is increased, therefore, the ball 43 capable of freely rolling is arranged between the mounting plate 39 and the rotating groove 41, on one hand, the gap between the mounting plate 39 and the rotating groove 41 is compensated, on the other hand, the friction force can be reduced due to the free rolling of the ball 43, the rotating efficiency of the sleeve 14 is improved, and the service life of the device is prolonged.

When the device is not used (when the first mounting seat 5 and the second mounting seat 6 are in a fixed state), the top of the second threaded rod 18 is in threaded connection with the inner side wall of the connecting cylinder 17, the bottom of the second threaded rod 18 penetrates through the first threaded hole 19 at the bottom of the first mounting seat 5 and the first threaded groove 20 at the bottom of the mounting groove 8 and is in threaded connection with the first threaded hole 19 and the first threaded groove 20, the first mounting seat 5 and the second mounting seat 6 are fixed in the longitudinal direction, at the moment, the inner sleeve 2 and the memory steel needle 3 can form an integral structure for facilitating puncture, when the memory steel needle 3 needs to be pulled out after the puncture is completed, only the cross rod 28 needs to be pressed, the pressure rod 12 moves downwards to push the sleeve 14 to rotate, the sleeve 14 rotates to drive the connecting cylinder 17 to rotate, the second threaded rod 18 is driven to move upwards when the connecting cylinder 17 rotates and is screwed out from the first threaded groove 20, so that the vertical fixation between the first mounting seat 5 and the second mounting seat 6 is released, the top of the first mounting seat 5 is provided with a handle 29, the handle 29 is positioned below the cross rod 28, and when the cross rod 28 is pressed to the upper part of the handle 29, the cross rod 28 and the handle 29 can be lifted together, so that the first mounting seat 5 and the memory steel needle 3 can be pulled out together.

Furthermore, the supporting plate 11 is connected with two sliding blocks 23 in a sliding manner, and the two sliding blocks 23 are respectively connected with the corresponding vertical limiting assemblies; a transverse limiting rod 24 is arranged on one side surface of each sliding block 23 close to the corresponding square rod 13, the square rod 13 penetrates through the transverse limiting rod 24, and a strip-shaped second through hole 25 is formed in the transverse limiting rod 24; the side surface of the mounting groove 8 is provided with a limit groove 26 corresponding to the transverse limit rod 24. A first connecting rod 27 is movably connected between the sliding block 23 and the corresponding pressure lever 12, and the first connecting rod 27 is hinged with the pressure lever 12 and the sliding block 23.

When the memory steel needle is not used (when the first mounting seat 5 and the second mounting seat 6 are in a fixed state), the end part of the transverse limiting rod 24 is positioned in the limiting groove 26 to fix the transverse direction of the first mounting seat 5 and the second mounting seat 6, and when the memory steel needle 3 needs to be pulled out, the transverse rod 28 is only pressed, the compression rod 12 moves downwards, the transverse limiting rod 24 is pushed to move towards the direction far away from the corresponding limiting groove 26 through the first connecting rod 27, so that the end part of the transverse limiting rod 24 is separated from the corresponding limiting groove 26, and the transverse limiting between the first mounting seat 5 and the second mounting seat 6 is released. In combination with the vertical fixing and releasing between the first mounting seat 5 and the second mounting seat 6, when the fixing limit of the first mounting seat 5 and the second mounting seat 6 is released, the transverse limiting rod 24 can be moved out of the limiting groove 26 at the same time only by pressing the transverse rod 28 downwards, the second threaded rod 18 is screwed out of the first threaded groove 20, the vertical and transverse fixing limits between the first mounting seat 5 and the second mounting seat 6 are released, the operation is very simple, time and labor are saved, and the operation can be easily and orderly completed by one person.

In the present application, the outer diameter, the inner diameter and the length of the straight sleeve 1 and the inner sleeve 2, the length and the diameter of the memory steel needle 3, the radian of the U-shaped structure at the front end, and the length of the blocking rope 4 can be selected according to clinical requirements.

The working principle of the invention is as follows: when the invention is used, the straight sleeve 1 and the blocking rope 4 are firstly pulled out from the second mounting seat 6, the straight sleeve 1 is firstly punctured to the vein vessel or the side of the hepatic pedicle corresponding to the hepatic segment to be cut off under the guidance of B-ultrasound, then the memory steel needle 3 is pulled to be inserted into the inner sleeve 2, the front end of the inner sleeve 2 deforms along with the front end of the memory steel needle 3, so that the integral front end of the inner sleeve 2 and the memory steel needle 3 forms a U-shaped structure, at the moment, the integral front end of the inner sleeve 2 and the memory steel needle 3 is pulled straight and inserted into the straight sleeve 1 and slowly pushed forward, when the front ends of the memory steel needle 3 and the inner sleeve 2 contact with the film 30 at the front end of the straight sleeve 1, the film 30 is punctured by the front end of the memory steel needle 3, the integral front end of the memory steel needle 3 and the inner sleeve 2 penetrates out from the front end of the straight sleeve 1, and the front end of the memory steel needle 3 recovers the deformation under the condition that the memory steel needle 3 is not limited by the straight sleeve 1, the memory steel needle 3 and the inner sleeve 2 are driven to form a U-shaped structure at the integral front end and bypass the vein or the hepatic pedicle to be blocked; at the moment, the straight sleeve 1 is withdrawn from the outside of the inner sleeve 2, the memory steel needle 3 is withdrawn from the inner sleeve 2, only the inner sleeve 2 is left to be punctured inside the hepatic segment, the blocking rope 4 penetrates from an opening at the tail end of the inner sleeve 2, the blocking rope 4 is bent along the trend of the inner sleeve 2, when the front end of the blocking rope 4 penetrates out of the front end of the inner sleeve 2, the blocking rope 4 is not limited by the inner sleeve 2, the front end of the blocking rope continues to puncture the hepatic segment, when the front end of the blocking rope 4 penetrates out of the surface of the hepatic segment, the front end and the tail end of the blocking rope 4 are both positioned on the surface of the hepatic segment, the bending part at the bottom of the blocking rope 4 is positioned at the bottom of a vein or a hepatic pedicle to be blocked, the blood flow of the vein or the hepatic pedicle to be blocked can be blocked by pulling the blocking rope 4, and the condition of heavy bleeding in the hepatic segment resection is prevented.

When the memory steel needle 3 is withdrawn from the inner sleeve 2, only the cross rod 28 needs to be pressed downwards, the cross rod 28 pushes the pressure rod 12 and the square rod 13 to move downwards, the driving gear 22 is driven to rotate under the meshing action of the rack 21 and the driving gear 22, the driving gear 22 drives the first rotating shaft 31 and the first bevel gear 32 to rotate, the first bevel gear 32 drives the second bevel gear 33 to rotate, and converts the rotation of the first bevel gear 32 in the vertical direction into the rotation in the horizontal direction, the second bevel gear 33 rotates to drive the second rotating shaft 34 and the first driven gear 35 to rotate, the first driven gear 35 rotates to drive the second driven gear 36 to rotate, the second driven gear 36 drives the sleeve 14 to rotate, thereby realizing that when the pressure lever 12 is pressed downwards, the sleeve 14 rotates to drive the connecting cylinder 17 to rotate, thereby driving the second threaded rod 18 to move upwards, and screwing the second threaded rod 18 out of the first threaded groove 20; meanwhile, when the pressure lever 12 moves downwards, the first connecting rod 27 pushes the transverse limiting rod 24 to move towards the direction away from the corresponding limiting groove 26, so that the end part of the transverse limiting rod 24 is separated from the corresponding limiting groove 26; that is, when the memory steel needle 3 is withdrawn from the inner sleeve 2, the transverse limiting rod 24 can be simultaneously removed from the limiting groove 26 only by pressing the transverse rod 28 downwards, the second threaded rod 18 is screwed out of the first threaded groove 20, the vertical and transverse fixing limitation between the first mounting seat 5 and the second mounting seat 6 is removed, the operation is very simple, time and labor are saved, and the operation can be easily and orderly completed by one person.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.