CN102499730B - Retractor for laparoscopic surgery, retractor head body and manufacturing method thereof - Google Patents

Abstract

The invention discloses a laparoscopic surgery retractor, a retractor head for laparoscopic surgery, a retractor head body and a manufacturing method thereof. The laparoscopic surgery retractor is provided with a handle, a handle seat, a threaded sleeve, a rotating handle, a fixed sleeve, a screw rod, a connecting sleeve, a sealing ring, a fixed plate, a retractor rod, a pull tube, a retractor seat and a retractor head, wherein the retractor head body is made of shape memory superelasticity nickel-titanium alloy. The drag hook head comprises a drag hook head body and a drag hook head front part. The invention also comprises a drag hook head body for laparoscopic surgery and a manufacturing method thereof, wherein the manufacturing method of the drag hook head body comprises the following steps: putting the nickel and titanium raw materials into a copper crucible, sealing and vacuumizing, and smelting at 1800 ℃ for 2 hours; rolling the plate into a plate by four times of rolling and four times of annealing; cutting the plate into strips by using electric sparks; forming a blank after the strip-shaped plate is subjected to fine machining; and (3) putting the blank into a shaping die, carrying out heat treatment at 480-500 ℃ for 20 minutes, and cooling and demoulding the blank. The invention has reasonable structure, the drag hook head has super strong reset function, can be stretched in an instrument and is convenient for operation.

Description

Retractor for laparoscopic surgery, retractor head for laparoscopic surgery, retractor head body and manufacturing method thereof

technical field

The invention relates to a laparoscopic surgery drag hook specially used for moving and separating tissues and organs in a human body in minimally invasive laparoscopic surgery, a drag hook head for laparoscopic surgery, a drag hook head body and a manufacturing method thereof.

Background technique

In the prior art, there is no disclosure of the manufacturing method of the retractor head for minimally invasive laparoscopic surgery with good elasticity; if it is necessary to move and separate tissues and organs in the human body during laparoscopic surgery, special-purpose tissue and organ grasping forceps or separating forceps are usually used, resulting in There are many instruments, the operation application is troublesome, the operation time is prolonged, and the ideal operation effect cannot be satisfied. Due to the large curvature of the existing laparoscopic surgery retractor, it is difficult to enter the abdominal cavity of the human body from the operation channel, or it is inconvenient to rotate. For example application number is 200820075177.8, the name is called the utility model of laparoscopic biliary system operation retractor, and its hook head is arc-shaped, and length is 6～8 centimeters, is inconvenient to be used in laparoscopic operation, also inconvenient to rotate.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a retractor for laparoscopic surgery, a retractor head for laparoscopic surgery, a retractor head body and a manufacturing method thereof.

The technical solution adopted by the present invention to solve the above-mentioned problems is: the retractor for laparoscopic surgery is characterized in that it is provided with a handle, a handle seat, a screw sleeve, a rotating handle, a fixed sleeve, a screw rod, a connecting sleeve, a sealing ring, a fixed plate, and a retractor rod. , pull tube, pull hook seat, pull hook head, the pull hook head includes the pull hook head body and the front part of the pull hook head. The fifth pin is set between the sleeve and the handle seat, the screw sleeve is connected with the screw rod, the handle is inserted into the screw sleeve, the handle and the handle base are fixed, the fourth pin is set between the fixed sleeve, the handle base, and the handle, and the fourth pin snaps into the fourth pin. The pin chute, the fifth pin snaps into the fifth pin chute, the turning handle and the screw sleeve are fixed by the first pin, one end of the draw tube is inserted into the screw for fixed connection, the rear end of the hook head body is snapped into the other end of the draw tube for fixed connection, the draw hook The rod is inserted into the connecting sleeve and tightened and fixed. The connecting sleeve and the hook rod are inserted into the hook head and the pull tube. The sealing ring and the fixing plate are inserted into the connecting sleeve. The front part of the head is fixedly connected with the main body of the draw hook head, and the main body of the draw hook head is made of nickel-titanium alloy with shape memory superelasticity.

The head of the hook head body of the present invention is provided with an arc-shaped portion, the radius of the arc-shaped portion is 20-25 mm, and the arc-shaped angle of the arc-shaped portion is 140°-160°.

The front part of the draw hook head of the present invention is provided with a hook head hole.

The present invention is also provided with a flushing interface, which is screwed into the connecting sleeve and fixed, and the flushing interface communicates with the hook rod.

The technical solution adopted by the present invention to solve the above problems also includes a retractor head for laparoscopic surgery, including the retractor head body and the front part of the retractor head. Made of flexible nickel-titanium alloy.

The front part of the draw hook head of the present invention is provided with a hook head hole.

The technical solution adopted by the present invention to solve the above problems also includes a retractor head body for laparoscopic surgery, which is characterized in that the retractor head body is made of shape-memory superelastic nickel-titanium alloy.

The technical scheme adopted by the present invention to solve the above problems also includes a laparoscopic surgery retractor head body manufacturing method, which is characterized in that the following steps are carried out in sequence: the nickel and titanium raw materials each accounting for 50% of the total weight of the raw materials are put into the interlayer and passed through the water The vacuum is sealed in the copper crucible, and it is smelted at a temperature of 1800 degrees Celsius for 2 hours; after four times of rolling and four times of annealing, the rolling temperature is 700 degrees Celsius, and the annealing temperature is 5-40 degrees Celsius. mm, 0.7mm thick plate; the plate is cut into strips by EDM; the strip plate is polished, polished, pickled and finished to form a blank; the blank is placed in a shaping mold and fixed, and the shaping mold is placed in a heat treatment furnace at 480 Heat treatment at ~500 degrees Celsius for 18 minutes to 22 minutes. After the furnace is turned on, quickly put the shaping mold into water at 23 to 28 degrees Celsius, and the billet is cooled to 25 degrees Celsius to 30 degrees Celsius for demoulding. The above-mentioned drag hook head body of the present invention can be made by this manufacturing method.

The part corresponding to the curved portion of the drag hook head body in the shaping mold of the present invention is arc-shaped with a radius of 20-25 mm and an arc angle of 140°-160°.

Compared with the prior art, the present invention has the following advantages and effects: the structure design is reasonable, the pull hook head is made of superelastic material, and has a super-strong reset function; The holes facilitate the insertion of sutures.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of the pulling hook main body in the pulled-in state according to the embodiment of the present invention.

Fig. 3 is an A-A view of the embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a drag hook according to an embodiment of the present invention.

Fig. 5 is a right side view of Fig. 4 .

Fig. 6 is a schematic diagram of the straightening and bending process of the hook according to the embodiment of the present invention.

Detailed ways

Referring to Figures 1 to 6, the embodiment of the present invention and the utility model embodiment of the laparoscopic surgery retractor are provided with a handle 1, a handle seat 2, a screw sleeve 3, a rotating handle 4, a fixed sleeve 5, a screw rod 6, a first pin 7, a connecting Sleeve 8, sealing ring 9, fixing plate 10, flushing interface 11, pull hook rod 12, pull tube 13, second pin 14, pull hook seat 15, third pin 16, pull hook head body 17, pull hook head front part 18, hook head Hole 19, the 4th pin chute 20, the 4th pin 21, the 5th pin 22, the 6th pin 23 and the 5th pin chute 24, draw hook head comprise draw hook head body 17 and draw hook head front part 18, screw rod 6 has The fourth pin chute 20, the fifth pin chute 24; the screw rod 6 is inserted into the handle base 2, the fixed sleeve 5 is inserted into the screw rod 6, the fixed sleeve 5 and the handle base 2 are fixed with the fifth pin 22, and the fifth pin 22 The part is located in the fifth pin chute 24, so that the screw rod 6 can slide on the handle base 2; the screw sleeve 3 is screwed into the screw rod 6 to connect, and the handle 1 is inserted into the screw sleeve 3 and then tightened and fixed with the handle base 2. The fixed sleeve 5, the handle seat 2 and the handle 1 are fixed, and the fourth pin 21 and the fifth pin 22 are just snapped into the fourth pin chute 20 and the fifth pin chute 24 respectively, so that the screw rod 6 can slide and cannot rotate; Fix with the first pin 7 after being tightened with the screw sleeve 3 . One end of the pull tube 13 is inserted into the screw rod 6 and fixed with the sixth pin 23, the rear end of the pull hook head body 17 is snapped into the pull tube 13, and the other end is fixed with the second pin 14; Put it into the connecting sleeve 8 and tighten it to fix it. The flushing port 11 just communicates with the hook rod 12 (inside); the connecting sleeve 8 and the hook rod 12 are inserted into the hook head body 17 and the pull tube 13, and the sealing ring 9 and the fixing plate 10 are snapped into the connecting sleeve. After 8, the connecting sleeve 8 and the handle seat 2 are tightened and fixed; the draw hook seat 15 is inserted into the draw hook rod 12 and fixed with the third pin 16; The head body 17 is fixed.

In the embodiment of the present invention, when the retractor head body 17 is in the pulled-in state, the hook head hole 19 is located just outside the retractor rod 12, which facilitates the penetration of sutures and increases the operation function.

When the turning handle 4 is turned to rotate the screw sleeve 3, the screw sleeve 3 drives the screw rod 6 to rotate and pull down, the screw rod 6 pulls the pull tube 13, and the pull tube 13 pulls the pull hook head body 17 to pull down, and the pull hook head body 17 is pulled into the pull hook rod 12, Form the drawing hook head body 17 shown in Figure 2 into (straightening) state; reverse the handle 4 to make the screw sleeve 3 rotate, the screw sleeve 3 drives the screw rod 6 to rotate and push up, the screw rod 6 pushes the pull tube 13, and the pull tube 13 Push the draw hook head body 17 upwards, the draw hook head body 17 is pushed out of the draw hook rod 12, and the draw hook head resets (Fig. 1).

In the laparoscopic surgery retractor designed by the present invention, the retractor head body 17 is made of a superelastic material and has a super-strong reset function, and its manufacturing method is as follows:

1. The hook head body 17 is made of nickel-titanium alloy with shape memory and superelasticity. Its element composition is: medical grade high elastic nickel (Ti) 50%, titanium (Ni) 50% raw materials, put the raw materials into the interlayer water-through copper The crucible is vacuum-sealed (10 ^-3 Pa), and it is smelted at a high temperature of 1800 degrees Celsius and 2 hours; due to the high hardness of the nickel-titanium alloy material (380-420HB), it needs to be rolled 4 times and annealed 4 times during the rolling process. The rolling temperature is 700°C, the annealing temperature is 5-40°C, and rolled into a plate with a length of 5 meters, a width of 60 mm, and a thickness of 0.7 mm. The composition of the nickel-titanium alloy in the embodiment of the present invention is that nickel and titanium respectively account for 50% by weight of the nickel-titanium alloy.

2. Nickel-titanium alloy plate processing: the blank plate is formed by smelting and rolling nickel-titanium alloy. The surface of the plate must be smooth without unevenness and cracks. Due to the high hardness of the nickel-titanium alloy plate, the plate must be cut into strips by electric sparks to achieve cutting accuracy. High, the material will not be damaged; the blank is formed after grinding, polishing, pickling and finishing.

3. Superelastic forming of nickel-titanium alloy plate processing: after the nickel-titanium alloy is formed into a blank, it is placed in a shaping mold and fixed. The shape angle is 140-160°. Put the shaping mold with the blank into the heat treatment furnace for high-temperature shaping. The temperature is controlled at 480-500°C, and the time is controlled at 18 minutes to 22 minutes (20 minutes in special cases);

After the furnace is turned on, the blank and the shaping mold are quickly put into water at 23-28°C (usually about 25°C), and the blank is cooled to 25-30°C (room temperature) for demoulding, and the hook head body 17 with memory superelasticity is made. The shaped hook head body 17 is deformed under the action of external force, and returns to the original memory bending state when the external force is lost.

The manufacturing method of the shape-memory superelastic nickel-titanium alloy is the prior art, but it is the original creation of the present invention to be used in the manufacture of the drag hook head body 17 . This embodiment uses a special method to manufacture the hook head body 17. The head of the hook head body 17 has an arc portion (see the upper part of Figure 5), and the radius of the arc portion is 20-25 mm. The arc angle is 140°～160°, which has the characteristics of large bending angle, high precision and convenient operation.

In the state of the parent phase (austenite state), the memory superelastic hook head of nickel-titanium alloy leads to stress-induced phase transformation under the action of external force, so that the nickel-titanium alloy exhibits mechanical behavior different from that of ordinary metal materials, and its elastic limit is much larger. Unlike ordinary metal materials, it does not obey the proportionality of the external force caused by the deformation of the object within the elastic limit (Hooke's law); when the force is applied, it forms a slip deformation and the deformation changes greatly. Once the external force is removed, the nickel-titanium alloy memory superelastic hook head will The strain carried by the stress-induced phase transition occurs and disappears to form superelasticity (the inverse phase transition of the martensitic phase transition).

The retractor for laparoscopic surgery designed by the present invention has a structural design that the retractor can be stretched in the instrument. In the application of laparoscopic surgery, the retractor head body 17 can be pulled into the retractor rod 12, and the retractor head and its front end can enter the human body through the instrument operation channel. abdominal cavity.

In the abdominal cavity of the human body, as long as the turning handle 4 is reversed to rotate the screw sleeve 3, the screw sleeve 3 drives the screw rod 6 to rotate and push up, the screw rod 6 pushes the pull tube 13, and the pull tube 13 pushes the pull hook head body 17 to push up, and the pull hook head body 17 pushes out the retractor rod 12, and the retractor head is reset to form (Fig. 1); technological innovation realizes the application of the retractor in the abdominal cavity of the human body during laparoscopic surgery.

The laparoscopic operation retractor designed by the present invention has a hook hole 19 on the retractor head. In the application of laparoscopic surgery, when the retractor is operated in the abdominal cavity of a human body, the effect of the hook hole 19 is to penetrate the suture Perform other surgical applications to increase surgical functions.

Any simple modification or combination of the technical solutions and technical features of the embodiments of the present invention shall be deemed to fall within the protection scope of the present invention.

Claims (4)

1. laparoscopic surgery drag hook, it is characterized in that: be provided with handle, the handle seat, swivel nut, turning handle, fixed cover, screw rod, adapter sleeve, sealing ring, fixing head, the drag hook bar, trombone slide, the drag hook seat, the drag hook head, the drag hook head comprises drag hook head body and drag hook head front portion, have the 4th pin chute on the screw rod, the 5th pin chute, screw rod is inserted in the handle seat, fixed cover is inserted in screw rod, between fixed cover and the handle seat the 5th pin is set, swivel nut is connected with screw rod, handle is inserted in swivel nut, handle and handle seat are fixed, fixed cover, the handle seat, the 4th pin is set between the handle, the 4th pin snaps in the 4th pin chute, the 5th pin snaps in the 5th pin chute, turning handle and swivel nut are by first dowel fixes, it is fixedly connected that trombone slide one end is inserted in screw rod, it is fixedly connected that drag hook head body rear end snaps in the trombone slide other end, the drag hook bar is inserted in adapter sleeve to be tightened fixing, adapter sleeve, the drag hook bar all is inserted in the drag hook head, trombone slide, sealing ring, fixing head snaps in adapter sleeve, and adapter sleeve and handle seat are tightened fixing, and it is fixedly connected that the drag hook cover for seat is gone into the drag hook bar, the drag hook head is anterior fixedlys connected with drag hook head body, and drag hook head body adopts the hyperelastic Nitinol of shape memory to make.

2. laparoscopic surgery drag hook according to claim 1, it is characterized in that: described drag hook head body head is provided with arch section, and the radius of arch section is 20～25 millimeters, and the arc angle of arch section is 140 °～160 °.

3. laparoscopic surgery drag hook according to claim 1, it is characterized in that: drag hook head front portion has the gib head hole.

4. according to claim 1 or 2 or 3 described laparoscopic surgery drag hooks, it is characterized in that: also be provided with the flushing interface, the flushing interface is screwed into adapter sleeve and fixes, and the flushing interface is communicated with the drag hook bar.

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