WO2018157870A1

WO2018157870A1 - Medical surgical instrument

Info

Publication number: WO2018157870A1
Application number: PCT/CN2018/077948
Authority: WO
Inventors: 梅尔泽; 靳风烁; 杨平; 徐豆豆
Original assignee: 重庆长麟梅捷医疗科技有限公司
Priority date: 2017-03-03
Filing date: 2018-03-03
Publication date: 2018-09-07
Also published as: CN107007308B; CN107007308A

Abstract

The existing endoscopic surgical instruments mainly comprise a pneumoperitoneum needle, separating pliers, a casing needle, a switching cap, grasping forceps, a needle holder, an electrocoagulation hook, an application device, scissors, a snare, a line type cutting anastomat, a repair stapler, a retractor, a specimen bag and a hook. Because the material and structural design factors, functions of the surgical instruments are undiversified, the instruments need to be frequently changed to implement multiple actions such as a separation, a shearing, a grasp and a pull, bringing inconvenience to an operator, and prolonging the operation time. To resolve the problems of the endoscopic instruments in the prior art, such as a complex structure, high costs in production and use of an integrated structure, undiversified functions, easiness to damage a tissue, failure to conform to ergonomics and impacts on surgical operations, a medical surgical instrument is provided. The medical surgical instrument comprises a handle, a steering fixing device, a push pipe (1), and a connecting rod (2). The handle is of an integrally-formed structure or a whole structure formed by connected segments, and comprises a transverse arm (3) and a vertical arm (4).

Description

Medical surgical instruments

Technical field

The invention relates to the technical field of medical instruments, in particular to medical surgical instruments.

Background technique

Existing laparoscopic surgical instruments mainly include pneumoperitoneum, separation forceps, trocar, conversion cap, grasping forceps, needle holder, electrocoagulation hook, applicator, scissors, snare, linear cutting stapler, repair nail , retractor, specimen bag and hook. The existing surgical instrument handle has a single operation mode, and most of them are finger clamping operations. It is easy to cause finger fatigue and wrist damage during long-term use during surgery, and when the tissue is pulled or pulled, the wrist needs to be rotated to change the working direction of the device. Finding a suitable working point brings great inconvenience to the operation; at present, the surgical instrument adopts a stainless steel multi-piece hinge structure, and is connected with the handle through a steel wire to control the opening and closing action of the functional part, because the hinge structure is small and subject to Limited force and numerous parts are not only complicated to produce and process, easy to damage, but also difficult to clean and disinfect after use, which affects the safety and sanitation of the operation. In addition, the existing surgical instruments are integrated structure, and any part or component will be damaged, resulting in overall retirement. The use cost is high; due to the material and structural design factors, the surgical instrument has a single function. During the use process, the device needs to be changed continuously to complete various actions such as separation, shearing, grasping, pulling, etc., which brings inconvenience to the operator and prolongs operation time. Therefore, the existing laparoscopic surgical instruments have problems of complicated structure, integrated structure, high production cost, single function, ergonomics, and affecting surgical operations.

Summary of the invention

In order to solve the problems that the existing laparoscopic surgical instruments have complicated structure, integrated structure, high production cost, single function, ergonomics, and influence on surgical operation, the present invention proposes a medical surgical instrument.

The medical surgical instrument of the present invention comprises a handle, a runner, a push tube and a connecting rod; the handle is provided with a push tube connecting hole and a connecting rod fixing hole, and the push tube is installed in the push tube connecting hole; the connecting rod is set in the push tube, One end of the connecting rod is installed in the fixing hole of the connecting rod, and the other end is extended outside the push tube and connected with a functional component.

Further, the handle is an integrally formed structure, or is formed into a unitary structure after segment forming, including a cross arm and a vertical arm; the vertical arm extends vertically downward along a left end of the cross arm; the cross arm is right The side rear portion extends vertically downwardly with an arm, and the upper portion of the arm is laterally disposed with a connecting rod fixing hole; the upper portion of the vertical arm is laterally provided with a push tube through hole, and the lower end portion of the vertical arm is rightward The driving arm is disposed at a lower end of the cross arm, and the driving arm is disposed in parallel with the driving arm. The upper part of the driving arm is laterally disposed with a semicircular groove for mounting the rotating wheel, and the upper part of the driving arm extends to the lower right side. a positioning arm; a lower end surface of the arm is in contact with an upper end surface of the positioning arm; the rotating wheel is locked in a semicircular groove in an upper portion of the driving arm, and a front end surface of the rotating wheel is provided with a push tube connecting hole connected to the push tube; The axis of the push tube through hole, the push tube connecting hole, the semicircular groove and the connecting rod fixing hole are on the same straight line; the push tube is connected to the push tube of the front end surface of the rotating wheel through the push tube through hole of the handle vertical arm Inside the hole, the connecting rod is set in the push tube, One end is installed in the connecting rod fixing hole in the upper part of the arm, and the other end is extended outside the push tube and connected with a functional component.

Further, the left side of the handle vertical arm is provided with a vertical strip-shaped hand grasping through hole, and the right end surface of the driving arm is provided with a hand grasping portion, and the hand grasping through hole and the hand grasping portion constitute a pistol type Holding mechanism.

Further, a rear portion of the upper end surface of the handle cross arm is provided with a curved protrusion and a grip portion formed by an upper end surface of the cross arm, and a lower end surface of the positioning arm is provided with a positioning arm recess, the grip portion and the recess The scissors type holding mechanism is formed.

Further, an upper portion of the handle driving arm is provided with a finger holding through hole, a left side upper portion of the vertical arm is provided with a finger holding recess, and the finger holding through hole and the finger holding recess form a finger grip Holding institutions.

Further, the handle is provided with a pistol type gripping mechanism and a scissor type gripping mechanism, or a pistol type gripping mechanism, a scissor type gripping mechanism and a finger type gripping mechanism, or a pistol type gripping mechanism and a finger type gripping mechanism , or a scissors type grip mechanism and a finger grip mechanism.

Further, a return spring is disposed between the upper portion of the vertical arm and the front end surface of the runner, and the return spring is sleeved outside the push tube.

Further, the connecting rod fixing hole disposed in the upper part of the arm is provided with a spring piece, and the outer side of the connecting rod fixing hole is provided with an electrode plug connected to the surgical instrument electrical workstation, the spring piece and the electrode plug Electrical connection.

Further, the functional component is prepared by using a superelastic material, so that the clamping force can be adjusted according to the size of the object to be clamped, thereby ensuring uniform force of the object to be clamped.

Further, the connecting rod end connecting function comprises a surgical scissors, a needle holder, a grasping forceps, a hemostat, a tissue pulling forceps or a separating clamp; and the relative movement of the push tube and the connecting rod drives the opening and closing of the function. The functional component comprises two upper and lower opposite functional bodies; the functional body is connected to the front end of the connecting rod by an elastic member; the elastic component refers to two elastic legs prepared by using an elastic material, and two elastic legs. One end of the two functional bodies are respectively connected to the upper and lower sides, and the other end is combined with the front end of the connecting rod. After the external force applied by the handle disappears, the functional body returns to the open state under the action of the elastic member.

Further, the connecting rod is an integral structure or a split structure, and the split structure includes a front portion of the connecting rod and a rear portion of the connecting rod, and a front end of the front portion of the connecting rod is connected with the functional part, and a rear end of the front part of the connecting rod It is provided with a groove and a boss which are engaged with the rear section of the connecting rod, or a bolt or a screw hole which is screwed with the rear section of the connecting rod, or a bayonet or a card slot which is connected with the rotating part of the connecting rod at the rear.

Further, the functional component has a unitary structure with the connecting rod or the connecting rod front section, or is welded or bonded as a unitary structure.

Further, the functional component is prepared using a nickel-titanium shape memory alloy, and the end temperature of the martensitic phase transition to the parent phase of the nickel-titanium shape memory alloy is lower than 37 °C.

Further, the working surface of the functional component is prepared by a nickel-titanium shape memory alloy, and the end temperature of the mother phase of the nickel-titanium shape memory alloy to the martensite phase is higher than 37 °C.

The beneficial effects of the medical surgical instrument of the invention are as follows: 1. Various operation modes of the handle, that is, any two or three combined operation modes of the pistol type holding operation, the finger type holding operation and the scissors type holding, compared with the existing operation modes The handle of the single operation mode is more ergonomically designed, which is convenient for the surgeon to choose a better or suitable grip mode to relieve the operator's hand fatigue; 2. Because of the super elastic structure of the functional part and the elastic part, it is in the absence of The external force exerted by the handle is in an open state, and the functional function is driven to complete the corresponding operation function under the relative movement of the push tube and the connecting rod, thereby avoiding the defects caused by the hinge structure of the traditional surgical instrument, and the overall structure is simple, convenient for disinfection and cleaning, and prolonged. Service life; 3. The push tube, connecting rod and handle of the surgical instrument are combined connection. When any working part is damaged, it can be replaced separately. Especially when the connecting rod adopts the split structure, only the function of the front end needs to be replaced. To avoid overall scrapping due to damage to local components, reducing the cost of use and maintenance; 4, the structure of the surgical instrument handle not only achieves a variety of The operation mode, and the action of pushing the push tube and the connecting rod relative to the handle to drive the functional part to complete the required operation; 5, the electric workstation electrode plug on the handle enables all the front end functional parts to be electrically cut, coagulated or The electric shear function not only saves operation time but also reduces intraoperative bleeding and reduces the risk of surgery. 6. The super-elastic characteristics of functional parts or functional bodies and elastic parts ensure uniform stress on the clamped object and reduce damage to the clamped object.

DRAWINGS

1 is a schematic view showing the structure of a medical surgical instrument of the present invention.

2 is a schematic view showing the structure of a handle of a medical surgical instrument of the present invention.

3 is a schematic view showing the fitting structure of the front section of the connecting rod and the rear section of the connecting rod of the medical surgical instrument of the present invention.

4 is a schematic view showing the threaded connection structure of the front section of the connecting rod and the rear section of the connecting rod of the medical surgical instrument of the present invention.

FIG. 5 is a schematic view showing the structure of the buckle connection between the front section of the connecting rod and the rear section of the connecting rod of the medical surgical instrument of the present invention.

detailed description

Specific embodiments of the present invention are further described below in conjunction with the accompanying drawings:

1 is a schematic structural view of a medical surgical instrument of the present invention. 2 is a schematic view showing the structure of a handle of a medical surgical instrument of the present invention. 3 is a schematic view showing the fitting structure of the front section of the connecting rod and the rear section of the connecting rod of the medical surgical instrument of the present invention. 4 is a schematic view showing the threaded connection structure of the front section of the connecting rod and the rear section of the connecting rod of the medical surgical instrument of the present invention. FIG. 5 is a schematic view showing the structure of the buckle connection between the front section of the connecting rod and the rear section of the connecting rod of the medical surgical instrument of the present invention. In the figure, 1 is a push tube, 2 is a connecting rod, 3 is a cross arm, 31 is a curved protrusion, 4 is a vertical arm, 41 is a push tube through hole, 42 is a vertical strip type hand holding through hole, 43 is Finger holding recess, 5 is rotating wheel, 51 is push tube connecting hole, 6 is arm, 61 is connecting rod fixing hole, 62 is electric station electrode plug, 7 is driving arm, 71 is semicircular groove, 72 is finger The through hole is held, 8 is a positioning arm, 81 is a recess of the positioning arm, 9 is a functional body, and 10 is an elastic member.

The medical surgical instrument of the present invention comprises a handle, a runner 5, a push tube 1 and a connecting rod 2; the handle is provided with a push tube connecting hole 51 and a connecting rod fixing hole 61, and the push tube 1 is installed in the push tube connecting hole 51; The connecting rod 2 is set in the push tube 1, and one end of the connecting rod 2 is installed in the connecting rod fixing hole 61, and the other end is extended outside the push tube 2 and connected with a functional member. The operator controls the push tube to slide along the axis of the connecting rod by the control of the handle, thereby realizing the opening or closing action of the front end function member, the overall structure is simple and the operation is convenient, and the push tube, the connecting rod and the handle of the surgical instrument are combined and detachable. The connection can be replaced when any working part is damaged. Compared with the traditional surgical instrument integrated structure, the overall scrapping is avoided due to partial component damage, and the use and maintenance cost is reduced.

Further, the handle is an integrally formed structure, or is formed into a unitary structure after segment forming, including a cross arm 3 and a vertical arm 4; the vertical arm 4 extends vertically downward along the left end of the cross arm 3; An arm 6 is vertically extended downwardly from the rear portion of the right arm 3, and a connecting rod fixing hole 61 is laterally disposed at an upper portion of the arm 6; a push tube through hole 41 is laterally disposed at an upper portion of the vertical arm 4. The lower end of the vertical arm 4 extends to the right through the arc to the upper end of the cross arm 3. The lower end of the cross arm 3 is provided with a driving arm 7, that is, the vertical arm 4 and the driving arm 7 are arranged side by side; the upper part of the driving arm 7 is laterally provided with the mounting wheel 5 a semicircular groove 71, the upper portion of the driving arm 7 extending downward to the lower right is provided with a positioning arm 8; the lower end surface of the arm 6 is in contact with the upper end surface of the positioning arm 8; the rotating wheel 5 is mounted on the upper part of the driving arm 7 In the semicircular groove 71, the front end surface of the runner 5 is provided with a push tube connection hole 51 connected to the push tube 1; the push tube through hole 41, the push tube connection hole 51, the semicircular groove 71, and the connecting rod fixing hole 61 The axis is on the same straight line; the push tube 1 is inserted through the push tube through hole 41 of the handle arm 4 to the push tube connection hole 51 of the front end surface of the runner 5 , The connecting rod 2 set in the push tube 1, which is mounted in the upper end of the arm 6 fixing hole of the connecting rod 61, the other end projects outside the push tube 1 and connected to a functional element. The operator drives the push tube to slide along the axis of the connecting rod by controlling the driving arm 7, thereby realizing the opening or closing action of the front end function member, the overall structure is simple and the operation is convenient, and the push tube, the connecting rod and the handle of the surgical instrument are combined. Removable connection, when any working part is damaged, it can be replaced separately. Compared with the traditional surgical instrument integrated structure, it avoids the overall scrapping due to partial component damage, reducing the use and maintenance costs.

The left side of the handle vertical arm 4 is provided with a vertical strip-shaped hand grasping through hole 42, and the right end surface of the driving arm 7 is provided with a hand grasping portion, which constitute a pistol type holding mechanism. The rear end of the upper end surface of the handle cross arm 3 is provided with a curved protrusion 31 and a grip portion formed by the upper end surface of the cross arm. The lower end surface of the positioning arm 8 is provided with a positioning arm recess 81, which constitute a scissors type grip. mechanism. The upper portion of the driving arm 7 of the handle is provided with a finger holding through hole 72, and the upper left portion of the vertical arm 4 is provided with a finger holding recess 43 which constitutes a finger type holding mechanism. The handle is provided with a pistol type gripping mechanism and a scissor type gripping mechanism, or a pistol type gripping mechanism, a scissor type gripping mechanism and a finger type gripping mechanism, or a pistol type gripping mechanism and a finger type gripping mechanism, or The scissor-type gripping mechanism and the finger-type gripping mechanism realize a variety of gripping modes, and are more ergonomically designed than the handle of the existing single operating mode, so that the surgeon can select a better or suitable grip during the surgical procedure. Hold the way to relieve the operator's hand fatigue.

A spring piece is disposed in the connecting rod fixing hole 61 of the upper part of the arm 6. The outer side of the connecting rod fixing hole 61 is provided with an electric station electrode plug 62, and the spring piece is electrically connected to the electric station electrode plug 62. The function is completed by electric cutting, electrocoagulation or electric shearing, the steps are simplified, and the surgical instruments need not be replaced, which not only saves operation time but also reduces intraoperative bleeding and reduces the risk of surgery.

The functional part is made of a super-elastic material, so that the clamping force can be adjusted according to the size of the object to be clamped, thereby ensuring uniform force of the object to be clamped and not easily pinching the object to be clamped.

A return spring is disposed between the upper portion of the vertical arm 4 and the front end surface of the rotating wheel 5. The return spring is sleeved on the outer side of the push tube, which is more convenient for the returning wheel 5 to return to the original state when the external force applied by the handle disappears, and the outer end of the connecting rod 2 is fixedly connected. The functional component comprises a surgical scissors, a needle holder, a grasping forceps, a hemostat, a tissue pulling forceps or a separating clamp; the relative movement of the push tube 1 and the connecting rod 2 drives the opening and closing of the functional member; the functional component comprises an elastic member And two functional bodies 9 disposed opposite to each other; the functional body 9 is connected to the front end of the connecting rod 2 through the elastic member 10; the elastic member 10 refers to two elastic legs prepared by using an elastic material, and two elastic legs One end of the two functional bodies 9 are respectively connected to the upper and lower sides, and the other ends are combined and connected with the front end of the connecting rod 2. After the external force applied by the handle disappears, the functional body is restored to the open state by the elastic member 10. . In this embodiment, the operator uses the pistol type grip handle as an example operation, the operator holds the handle to apply force, and the driving arm 7 and the vertical arm 4 move relative to each other to drive the push tube 1 to move forward relative to the connecting rod 2, and the elastic member 10 is Under the action of the push tube, the driving function body 9 is gradually closed, and the action of grasping, cutting, etc. is realized; when the operator holds the handle and gradually releases the force to the external force applied by the handle, the driving arm 7 and the rotating wheel 5 of the handle are removed. The original position is restored by the return spring, and the push tube 1 is moved backward relative to the connecting rod 2. The elastic member 10 is gradually opened by the closed state by the super elastic force, so that the functional body 9 is gradually opened to complete the separation and the like. The design of the overall structure and the superelastic properties of the material ensure that the entire operation process is convenient and labor-saving, and no manual operation is required to open the functional body, and the return spring makes the runner 5 and the driving arm 7 move more smoothly.

The connecting rod 2 is an integral structure, and the functional part is integrated with the front part of the connecting rod or the connecting rod, or the welded joint is an integral structure to realize an integrated structure, or the connecting rod 2 is a split structure, which is divided into a front part of the connecting rod and a connecting rod. a front end of the connecting rod front end is connected with the functional part, and a rear end of the connecting rod front end is provided with a groove and a boss which are engaged with the rear part of the connecting rod, or a bolt or a screw threadedly connected with the rear part of the connecting rod A hole, or a bayonet or card slot that is connected to the rear of the connecting rod. The connecting rod combination connection method is convenient for disassembly and replacement, especially for conveniently replacing the front end function parts, thereby avoiding overall scrapping due to partial component damage, and reducing the use and maintenance costs.

The functional part is integral with the connecting rod or the front section of the connecting rod, or welded or bonded to the integral structure. The combination of functional parts and connecting rods reduces the cost of consumption and avoids overall scrapping due to damage to local parts.

The functional or functional body and the elastic member are prepared using a nickel-titanium shape memory alloy, and the martensite phase transition to the mother phase of the nickel-titanium shape memory alloy is less than 37 °C.

A nickel-titanium shape memory alloy having a transformation end temperature of martensite to the mother phase of less than 37 ° C is used to utilize the superelastic properties of the nickel-titanium shape memory alloy. Under normal circumstances, the temperature in the human body is about 37 ° C. At this time, the nickel-titanium shape memory alloy has superelasticity, that is, has an elastic deformation ability with a large deformation amount. Under the continuous action of the external force applied by the handle, the nickel-titanium shape memory alloy induces the martensitic transformation and produces a large elastic deformation, so that the functional part or the functional body and the elastic member can overcome the difference of the local stress when the elastic member is closed to maintain the working surface. Uniform contact and force, so that the clamped tissue is evenly stressed, avoiding tissue damage, and has good practicability.

The working surface of the functional part is made of a nickel-titanium shape memory alloy, and the end temperature of the mother phase of the nickel-titanium shape memory alloy to the martensite phase is higher than 37 °C.

A nickel-titanium shape memory alloy having a transition temperature of the mother phase to the martensite phase and a temperature higher than 37 ° C is used to utilize the shape memory property of the nickel-titanium shape memory alloy. The functional member is formed at 37 ° C or higher, and the shape of the functional member is maintained at room temperature by the one-way shape memory effect of the nickel-titanium shape memory alloy. Under normal circumstances, the temperature in the human body is about 37 ° C, and will not exceed the transition end temperature of the mother phase to the martensite phase, and still maintain the shape at the time of molding. When used for a period of time, local plastic deformation of the clamping surface may occur due to repeated clamping. At this time, the functional component will be restored to the environment above 37 ° C (such as hot water). The shape of the forming part improves the service life of the functional parts. At the same time, the functional parts can also be disinfected and cleaned in an environment above 37 ° C to ensure the safety and hygiene of the operation.

The beneficial effects of the medical surgical instrument of the invention are as follows: 1. Various operation modes of the handle, that is, any two or three combined operation modes of the pistol type holding operation, the finger type holding operation and the scissors type holding, compared with the existing operation modes The handle of the single operation mode is more ergonomically designed, which is convenient for the surgeon to choose a better or suitable grip to relieve the operator's hand fatigue; 2. Because of the functional parts and elastic parts

The super-elastic structure is in an open state under the action of an external force applied by the handle, and the functional function is driven to complete the corresponding operation function under the relative movement of the push tube and the connecting rod, thereby avoiding the defects caused by the hinge structure of the conventional surgical instrument, and the whole The utility model has the advantages of simple structure, convenient disinfection and cleaning, and prolonging the service life; 3. The push tube, the connecting rod and the handle of the surgical instrument are combined connection, and can be replaced separately when any working part is damaged, especially the connecting rod adopts a split structure. Only need to replace the front-end functional parts to avoid the overall scrapping due to partial component damage, reducing the use and maintenance costs; 4, the structure of the surgical instrument handle not only achieves a variety of operating modes, but also achieves the force of the handle to drive the push tube and The connecting rods are relatively moved to drive the functional parts to complete the required operation; 5. The electrical workstation electrode plug on the handle enables all front-end functional parts to be electrically cut, coagulated or sheared, which not only saves operation time but also reduces intraoperative bleeding. Reduce the risk of surgery; 6, the super-elastic properties of functional or functional parts and elastic parts to ensure the object to be clamped Uniform force, reducing damage to the object being clamped.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Claims

A medical surgical instrument, comprising: a handle, a runner, a push tube and a connecting rod; the handle is provided with a push tube connecting hole and a connecting rod fixing hole, the push tube is installed in the push tube connecting hole; the connecting rod set In the push tube, one end of the connecting rod is installed in the fixing hole of the connecting rod, and the other end protrudes out of the push tube and is connected with a functional component.
The medical surgical instrument according to claim 1, wherein the handle is an integrally formed structure, or is formed into a unitary structure after segment forming, including a cross arm and a vertical arm; the vertical arm is along a left end of the cross arm The head extends vertically downward; the right rear portion of the cross arm extends vertically downwardly with an arm, and the upper portion of the arm is laterally disposed with a connecting rod fixing hole; the upper portion of the vertical arm is laterally provided with a push tube a through hole extending upwardly from the lower end of the vertical arm to the right through the arc to the lower end of the cross arm is provided with a driving arm, that is, the vertical arm and the driving arm are arranged side by side; the upper part of the driving arm is laterally disposed with a semicircle of the mounting wheel a slot, a positioning arm extending from the upper portion of the driving arm to the lower right side; the lower end surface of the arm is in contact with the upper end surface of the positioning arm; the rotating wheel is locked in a semicircular groove in the upper part of the driving arm, and the front end of the rotating wheel The surface is provided with a push tube connection hole connected to the push tube; the axis of the push tube through hole, the push tube connection hole, the semicircular groove and the connecting rod fixing hole are on the same straight line; the push tube is pushed through the handle vertical arm The pipe through hole is fixedly mounted on the front end surface of the runner In the push tube connecting hole, the connecting rod is set in the push tube, one end of which is installed in the connecting rod fixing hole in the upper part of the arm, and the other end is extended outside the push tube and connected with a functional component.
The medical surgical instrument according to claim 2, wherein a left side of the handle arm is provided with a vertical strip-shaped hand grasping through hole, and a right end surface of the driving arm is provided with a hand grasping portion, The hand grasping through hole and the hand grasping part constitute a pistol type holding mechanism.
The medical surgical instrument according to claim 2, wherein a rear portion of the upper end surface of the handle cross arm is provided with a curved protrusion and a grip portion formed by an upper end surface of the cross arm, and a lower end surface of the positioning arm is disposed There is a recess of the positioning arm, and the grip portion and the recess form a scissors type gripping mechanism.
The medical surgical instrument according to claim 2, wherein an upper portion of the handle driving arm is provided with a finger holding through hole, and a left side upper portion of the vertical arm is provided with a finger holding recess, the finger grip The through hole and the finger holding recess form a finger type holding mechanism.
A medical surgical instrument according to claim 2, wherein said handle is provided with the pistol type gripping mechanism and the scissor type gripping mechanism according to claims 2 and 3, or the pistols of claims 2, 3 and 4 Type grip mechanism, scissor type gripping mechanism and finger gripping mechanism, or pistol type gripping mechanism and finger gripping mechanism according to claims 2 and 4, or scissor type gripping mechanism according to claims 3 and 4. And a finger grip mechanism.
The medical surgical instrument according to claim 2, wherein a return spring is disposed between the upper portion of the vertical arm and the front end surface of the runner, and the return spring is fitted outside the push tube.
The medical surgical instrument according to claim 2, wherein the connecting rod fixing hole disposed in the upper middle portion of the arm is provided with a spring piece, and the outer side of the connecting rod fixing hole is provided to be connected with the surgical instrument electrical workstation. The electrode plug is electrically connected to the electrode plug.
The medical surgical instrument according to claim 2, wherein the functional member is made of a superelastic material, so that it can adjust the clamping force according to the size of the object to be clamped, thereby ensuring that the object to be clamped is subjected to Uniform force.
The medical surgical instrument according to claim 2, wherein the connecting member of the connecting rod end comprises a surgical scissors, a needle holder, a grasping forceps, a hemostat, a tissue pulling forceps or a separating forceps; The relative movement of the connecting rod drives the opening and closing of the function; the functional part comprises an elastic member and two upper and lower oppositely disposed functional bodies; the functional body is connected to the front end of the connecting rod by an elastic member; the elastic member It refers to two elastic legs prepared by elastic materials. One end of the two elastic legs is connected with two functional bodies disposed on the upper and lower sides respectively, and the other ends are combined and connected with the front end of the connecting rod, after the external force applied by the handle disappears. The functional body is restored to an open state by the action of the elastic member.
The medical surgical instrument according to claim 2, wherein the connecting rod is a unitary structure or a split structure, and the split structure includes a connecting rod front section and a connecting rod rear section, and the connecting rod front section The front end is connected with the functional component, and the rear end of the front section of the connecting rod is provided with a groove and a boss which are fitted with the rear section of the connecting rod, or a bolt or a screw hole which is screwed to the rear section of the connecting rod, or a rear section of the connecting rod Rotate the bayonet or card slot of the snap connection.
The medical surgical instrument according to claim 11, wherein the functional member is integrally formed with the front portion of the connecting rod or the connecting rod, or welded or bonded to a unitary structure.
The medical surgical instrument according to claim 10, wherein the functional member or the functional member and the elastic body are made of a nickel-titanium shape memory alloy, and the end temperature of the martensite phase to the mother phase of the nickel-titanium shape memory alloy is changed. Below 37 °C.
The medical surgical instrument according to claim 10, wherein the working surface of the functional member is made of a nickel-titanium shape memory alloy, and the end temperature of the mother phase to the martensite phase of the nickel-titanium shape memory alloy is higher than 37 °C.