CN211911675U

CN211911675U - Electric bipolar thermal biopsy forceps for endoscope

Info

Publication number: CN211911675U
Application number: CN201921312323.9U
Authority: CN
Inventors: 章宏; 刘星宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2020-11-13
Anticipated expiration: 2029-08-14

Abstract

An electric bipolar thermal biopsy forceps for an endoscope comprises a handle, a sliding sleeve, a fixed seat, a double-cavity tube sheath, two pull rods, a limiting block, an upper jaw forceps and a lower jaw forceps; the handle is a handheld part, the sliding sleeve slides on the handle, the double-cavity pipe sheath is made of high-pressure-resistant materials and is internally provided with a partition, one end of the limiting block is fixed on the double-cavity pipe sheath, the other end of the limiting block is hinged with the upper jaw clamp and the lower jaw clamp, one end of each of the two pull rods is electrically connected with the sliding sleeve, the other end of each of the two pull rods is respectively electrically connected with the upper jaw clamp and the lower jaw clamp, the sliding sleeve drives the two pull rods to synchronously move back and forth while sliding on the handle, and the two pull rods further pull the upper jaw clamp and the lower jaw clamp to rotate, so that. The utility model discloses to patient's security height, reduced the operation risk, have simple structure, convenient operation, low cost's advantage.

Description

Electric bipolar thermal biopsy forceps for endoscope

Technical Field

The utility model relates to a medical treatment is with endoscope operation equipment, concretely relates to electric bipolar heat biopsy forceps for endoscope belongs to medical instrument technical field.

Background

Biopsy forceps are indispensable tools for obtaining pathological specimens in endoscopy, thermal biopsy forceps are common instruments for hemostasis under an endoscope, and the thermal biopsy forceps are used for clamping culprit vessels or lesions under direct vision of the endoscope, and then an exact and effective hemostasis purpose can be achieved through electrocoagulation current. The thermal biopsy forceps have strong practical value in endoscopic mucosal resection and endoscopic submucosal dissection. Thermal biopsy forceps have two modes, monopolar and bipolar.

In the monopolar mode, the circuit consists of the high frequency generator, the patient plate, the connecting leads and the electrodes through which the current passes through the patient and from the patient plate and its leads back to the high frequency generator. To avoid continuing to heat the tissue as the current returns away from the patient, thus burning the patient, the patient plate in monopolar mode must have a relatively large area in contact with the body to provide a path of low impedance and low current density. The electric monopole hot biopsy forceps are common accessories in endoscopic surgery, although the purpose of hemostasis can be achieved, pole plates need to be pasted, current in a loop passes through a human body, and due to the fact that the loss of the loop is large, the passing current is also large, and therefore certain potential safety hazards exist for a patient.

The electric bipolar thermal biopsy forceps is a medical instrument which is safer and more reliable than the electric monopolar thermal biopsy forceps, and the members forming two electrodes are connected with high-frequency current after contacting human tissues, and the heat is generated under the action of the high-frequency current to solidify the contacted tissues, so that the aim of stopping bleeding is fulfilled. Since the range of action of the current is limited between the two electrodes, the degree of damage and the effect on the human tissue are much less than in the monopolar mode.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned defect that current electric monopole heat biopsy forceps exist, the utility model provides an endoscope is with electric bipolar heat biopsy forceps replaces the return circuit that unipolar plate and human body formed through the return circuit between two electrodes to it is little to reach the electric current scope of flowing through the human body, and the return circuit loss is little, purpose safer relatively.

Based on the above-mentioned purpose, the utility model discloses the technical scheme who takes as follows:

an electric bipolar thermal biopsy forceps for an endoscope comprises a handle, a sliding sleeve, two pull rods, a double-cavity tube sheath, two limiting blocks, upper jaw forceps and lower jaw forceps;

the handle is a handheld part; the sliding sleeve is sleeved on the handle and can slide back and forth along the handle, and an electric socket is arranged in the sliding sleeve; the double-cavity tube sheath is made of high-pressure-resistant materials and is fixed at the front end of the handle; the inner cavity of the double-cavity tube sheath is internally provided with a longitudinal partition, and double tube cavities which are not communicated with each other and are along the longitudinal direction are formed in the double-cavity tube sheath; the rear ends of the two limiting blocks are respectively plugged into the double-lumen tube in an interference fit manner and fixedly connected with the front end of the double-lumen tube sheath, and longitudinal through holes penetrating through the rear ends and the front ends are formed in the limiting blocks; the upper claw clamp and the lower claw clamp are conductive metal bodies, the shapes of the upper claw clamp and the lower claw clamp are similar, the jaw directions of the upper claw clamp and the lower claw clamp are opposite, and the upper claw clamp and the lower claw clamp are hinged to the front ends of the two limiting blocks through pins respectively and can rotate around the pins; the two pull rods respectively penetrate through the double-cavity of the double-cavity tube sheath and the longitudinal through holes of the two limiting blocks in sequence, one end of each pull rod is fixed on the sliding sleeve and is electrically connected with the electric socket, and the other end of each pull rod is connected with the rear parts of the upper claw clamp and the lower claw clamp respectively and is electrically connected;

the sliding sleeve slides on the handle and simultaneously drives the two pull rods to move back and forth, and the two pull rods further pull the upper claw tongs and the lower claw tongs to rotate around the pin, so that the upper claw tongs and the lower claw tongs are opened and meshed.

Furthermore, the electric bipolar thermal biopsy forceps also comprise a fixed seat, and the fixed seat and the two pull rods form interference fit to achieve fixed connection, so that the two pull rods synchronously move back and forth; the fixing seat is made of insulating materials, the two pull rods are separated, and the distance between the two pull rods can be adjusted, so that the requirement of the electrical distance between the two pull rods is met.

Furthermore, the connection point of the upper claw clamp and the pull rod is positioned below the pin connected with the upper claw clamp, and the connection point of the lower claw clamp and the other pull rod is positioned above the pin connected with the lower claw clamp.

Furthermore, the jaws of the upper and lower claw tongs are provided with tongs teeth, the middle surrounded by the tongs teeth is provided with a tongs jaw groove, the rear parts of the upper and lower claw tongs are provided with tongs handles, and the tongs handles are respectively hinged on the front ends of the two limit blocks through the pins.

Furthermore, the front ends of the limiting blocks are provided with grooves, and the forceps handles of the upper and lower forceps are respectively inserted into the grooves of the two limiting blocks and are respectively hinged to the two limiting blocks through the pins; the root of the forceps handle is interfered by the groove bottom of the groove, so that the rotation of the upper jaw forceps and the lower jaw forceps is limited within a certain range.

Furthermore, the surfaces of the upper claw and the lower claw except the jaw slot are coated with insulating coatings, so that the upper claw and the lower claw are prevented from causing insufficient electrical distance in the rotating process.

Furthermore, the positions of the jaw teeth of the upper jaw and the lower jaw are staggered so that the upper jaw and the lower jaw are tightly meshed.

Furthermore, the two pull rods are steel wire ropes and are consistent in length, and the rotation amplitude of the upper claw clamp is the same as that of the lower claw clamp.

Furthermore, the withstand voltage of the partition of the double-cavity tube sheath meets the electrical requirement so as to ensure the insulation of the two pull rods in the double-cavity tube sheath.

Furthermore, the two limiting blocks extend out of the parts of the double-cavity pipe sheath, and except for the parts of the two limiting blocks, which are connected with the upper claw tongs and the lower claw tongs, the surfaces of the two limiting blocks are sprayed with insulating coatings so as to ensure that the insulating and pressure-resistant properties between the two limiting blocks meet the electrical requirements.

The utility model has the advantages of as follows:

1. current is transmitted to the upper and lower claws and human tissues in the middle of the two claws through the pull rod and does not pass through other body parts, so that the influence range of the current is small, the safety to a patient is high, and the risk is extremely low.

2. A loop is formed between the two poles, the loop loss is small, the required current is small, the heat of a working area is not high, the service life of the thermal biopsy forceps is effectively prolonged, and the operation risk is effectively reduced.

3. The utility model has the advantages of simple structure and convenient operation.

Drawings

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

Fig. 2 is a schematic view of the upper and lower claws of the present invention.

Fig. 3 is a perspective view of fig. 2.

Fig. 4 is a partially enlarged view of fig. 2.

Fig. 5 is a sectional view taken along line a-a of fig. 2.

In the figure, the position of the upper end of the main shaft,

the clamp comprises a handle, a track, a sliding sleeve, a socket, a fixing seat, a pull rod, a double-cavity pipe sheath, a partition, a double pipe cavity, a limiting block, a groove 61, a groove bottom 62, an upper jaw clamp, a lower jaw clamp, a clamp tooth 781, a clamp jaw groove 782, a clamp handle 783 and a pin 9, wherein the handle is arranged on the handle, the track is 11, the sliding sleeve is 2, the socket is 21, the fixing seat is 3, the pull rod is 4, the double-cavity pipe sheath is 5, the partition is 51, the double.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments, which should not be construed as limiting the scope of the present invention.

Referring to fig. 1, it is shown that the electric bipolar thermal biopsy forceps for endoscope includes a handle 1, a sliding sleeve 2, a fixing base 3, two pull rods 4, a double-lumen sheath 5, two limiting blocks 6, an upper jaw forceps 7 and a lower jaw forceps 8.

The handle 1 is a handheld part and is provided with two rails 11 along the longitudinal direction; the sliding sleeve 2 is sleeved on the handle 1 and can slide along the track 11, and an electric socket 21 is arranged in the sliding sleeve 2.

The double-cavity tube sheath 5 is made of high-pressure resistant materials and is fixed at the front end of the handle 1; the double lumen sheath 5 has a longitudinal partition 51 in the middle of its lumen, see fig. 5, and a double lumen 52 in the longitudinal direction is formed inside the double lumen sheath 5.

Referring to fig. 2, the rear ends of the two limiting blocks 6 are respectively plugged into the double lumens 52 at the front ends of the double lumen sheaths 5, and the limiting blocks 6 and the double lumens 52 form an interference fit to be fixedly connected; the front end of the limiting block 6 is provided with a groove 61, see fig. 3, and the groove 61 is provided with a pin hole in the transverse direction; a longitudinal through hole is formed in the limiting block 6, and the longitudinal through hole penetrates through the rear end of the limiting block 6 and the groove bottom 62 of the front end groove 61, see fig. 4, so as to penetrate through the pull rod 4.

Referring to fig. 2, the upper jaw 7 and the lower jaw 8 are made of conductive metal and made of medical stainless steel, and have similar shapes, and the jaws are oppositely arranged. Referring to fig. 3 and 4, the jaws of the upper jaw 7 and the lower jaw 8 are provided with teeth 781, and the teeth 781 of the upper jaw 7 and the lower jaw 8 are staggered by one tooth so that the two jaws are tightly engaged. The middle of the upper jaw forceps 7 and the lower jaw forceps 8 is surrounded with a jaw groove 782 for clamping tissue biopsy and electrocoagulation, and when the upper jaw forceps 7 and the lower jaw forceps 8 are clamped, a hollow cavity is formed in the middle. The rear parts of the upper claw 7 and the lower claw 8 are provided with a claw handle 783, the claw handles 783 of the upper claw 7 and the lower claw 8 are respectively inserted into the grooves 61 of the two limit blocks 6 and are respectively hinged on pin holes of the grooves 61 through pins 9, so that the upper claw 7 and the lower claw 8 are respectively hinged at the front ends of the limit blocks 6 and can rotate around the pins 9, and the opening and the engagement between the upper claw 7 and the lower claw 8 are realized; when the two forceps are slowly closed, the forceps teeth 781 of the two forceps clamp the human tissue.

Referring to fig. 4, when the upper and

lower claws

7 and 8 swing around the pin 9, the root of the handle 783 is interfered by the groove bottom 62 of the groove 61, so that the rotation of the upper and

lower claws

7 and 8 is limited to a certain extent.

Referring to fig. 2, the two pull rods 4 are steel wire ropes and have the same length, and respectively sequentially penetrate through the double-lumen 52 of the double-lumen sheath 5 and the longitudinal through holes of the two limit blocks 6, one end of each pull rod is connected with the electrical socket 21 of the sliding sleeve 2 and is electrically connected, and the other end of each pull rod is connected with the forceps handles 783 of the upper forceps 7 and the lower forceps 8 and is electrically connected. The pull rod 4 can move back and forth to drive the upper claw 7 and the lower claw 8 to rotate around the pin 9 to swing. Referring to fig. 4, the connection point of the upper jaw 7 and the pull rod 4 is located below the pin 9 connected to the upper jaw 7, and the connection point of the lower jaw 8 and the other pull rod 4 is located above the pin 9 connected to the lower jaw 8.

The fixed seat 3 is made of insulating materials and is respectively and fixedly connected with the two pull rods 4 so as to ensure that the two pull rods 4 synchronously move back and forth; this fixing base 3 with pull rod 4 is interference fit, and cuts off these two pull rods 4, through fixing base 3 can adjust the distance between two pull rods 4 to satisfy the electrical distance between the two.

Referring to fig. 1, the sliding sleeve 2 slides on the handle 1 to drive the two pull rods 4 to synchronously move back and forth, and the two pull rods 4 further pull the upper jaw 7 and the lower jaw 8 to rotate and swing around a pin 9, so as to realize the opening and engagement actions of the upper jaw 7 and the lower jaw 8; because the two pull rods 4 have the same length and are fixed together by the fixed seat 3 to move synchronously, the action amplitudes of the upper jaw 7 and the lower jaw 8 are the same.

Because the utility model adopts the bipolar loop, the requirement for the electrical insulation performance is very strict, because the personal safety of the operating doctor, the bench nurse and the patient is concerned. The electric safety performance of the electric bipolar thermal biopsy forceps for the endoscope must meet the requirements of IEC60601-1 and IEC 60601-2-2.

Referring to fig. 5, the two pull rods 4 are separated by the partition 51 in the double lumen sheath 5, and do not contact each other, and the pressure resistance of the partition 51 meets the electrical requirement to ensure the insulation of the two pull rods 4 in the double lumen sheath 5. The surfaces (excluding the parts connected with the upper claw tongs 7 and the lower claw tongs 8) of the parts of the two limiting blocks 6 extending out of the double-cavity pipe sheath 5 are coated with insulating coatings, and the insulating and pressure-resistant performance between the two limiting blocks 6 meets the electrical requirements. The surfaces of the upper and

lower jaws

7 and 8 except the jaw slot 782 are coated with an insulating coating to prevent the upper and

lower jaws

7 and 8 from being too close to each other during rotational swing to cause insufficient electrical distance.

The working principle of the utility model is that, sliding sleeve 2 drives through sliding two pull rods 4, two pull rods 4 drive go up the claw pincers 7 and lower claw pincers 8 carry out the rotation swing and reach and open the meshing, after last claw pincers 7 and lower claw pincers 8 press from both sides tight tissue, through its power output of foot switch control. The specific operation process is as follows:

the upper claw forceps 7 and the lower claw forceps 8 are in an engaged state in a normal state, when human tissues needing cutting blood coagulation are found, the sliding sleeve 2 is pushed, the sliding sleeve 2 drives the two pull rods 4, the two pull rods 4 drive the upper claw tongs 7 and the lower claw tongs 8, because the upper claw tongs 7 and the lower claw tongs 8 are hinged on the limiting block 6 by the pin 9, the upper and

lower claws

7 and 8 can only rotate around the pin 9 (rotation axis), and, due to the limitation of the groove bottom 62 of the groove 61 of the stopper 6, when the forceps rotate to a certain angle, the forceps cannot rotate continuously, at the moment, the upper forceps 7 and the lower forceps 8 are opened to a proper degree and then move to tissues, then the sliding sleeve 2 is slowly pulled to ensure that the upper jaw 7 and the lower jaw 8 are slowly closed to clamp the tissue, when the tissue is clamped to a proper position, the foot switch is stepped down to output power, causing the tissue in the portion between the jaw slot 782 of the upper and

lower jaws

7, 8 to heat up and coagulate blood.

The above description is only for the preferred embodiment of the present invention, and it should be pointed out that all equivalent modifications, variations and corrections made by the content of the present invention by those skilled in the art should be the protection scope of the present invention.

To sum up, endoscope power consumption bipolar heat biopsy forceps have fine operation and experience, it has given up the polar plate, not only economical and practical, greatly reduced the operation risk moreover.

Claims

1. The utility model provides an electric bipolar heat biopsy forceps for endoscope which characterized in that: the electric bipolar thermal biopsy forceps comprise a handle, a sliding sleeve, two pull rods, a double-cavity tube sheath, two limiting blocks, upper claw forceps and lower claw forceps;

2. The electric bipolar thermal biopsy forceps for an endoscope according to claim 1, characterized in that: the electric bipolar thermal biopsy forceps also comprise a fixed seat, and the fixed seat and the two pull rods form interference fit to achieve fixed connection, so that the two pull rods synchronously move back and forth; the fixing seat is made of insulating materials, the two pull rods are separated, and the distance between the two pull rods can be adjusted, so that the requirement of the electrical distance between the two pull rods is met.

3. The electric bipolar thermal biopsy forceps for an endoscope according to claim 1, characterized in that: the connecting point of the upper claw clamp and the pull rod is positioned below the pin connected with the upper claw clamp, and the connecting point of the lower claw clamp and the other pull rod is positioned above the pin connected with the lower claw clamp.

4. The electric bipolar thermal biopsy forceps for an endoscope according to claim 1, characterized in that: the jaw of the upper jaw clamp and the jaw of the lower jaw clamp are provided with clamp teeth, the middle surrounded by the clamp teeth is provided with a clamp jaw groove, the rear parts of the upper jaw clamp and the lower jaw clamp are provided with clamp handles, and the clamp handles are respectively hinged to the front ends of the two limiting blocks through the pins.

5. The electric bipolar thermal biopsy forceps for an endoscope according to claim 4, characterized in that: the front ends of the limiting blocks are provided with grooves, and the forceps handles of the upper and lower forceps are respectively inserted into the grooves of the two limiting blocks and are respectively hinged on the two limiting blocks through the pins; the root of the forceps handle is interfered by the groove bottom of the groove, so that the rotation of the upper jaw forceps and the lower jaw forceps is limited within a certain range.

6. The electric bipolar thermal biopsy forceps for an endoscope according to claim 4, characterized in that: insulating coatings are sprayed on the surfaces of the upper claw clamp and the lower claw clamp except the jaw slot, so that the upper claw clamp and the lower claw clamp are prevented from having insufficient electrical distance in the rotating process.

7. The electric bipolar thermal biopsy forceps for an endoscope according to claim 1, characterized in that: the positions of the forceps teeth of the upper jaw and the lower jaw are staggered so that the upper jaw and the lower jaw can be tightly meshed.

8. The electric bipolar thermal biopsy forceps for an endoscope according to claim 1, characterized in that: the two pull rods are steel wire ropes and are consistent in length, and the rotation amplitude of the upper claw clamp is the same as that of the lower claw clamp.

9. The electric bipolar thermal biopsy forceps for an endoscope according to claim 1, characterized in that: the withstand voltage of the partition of the double-cavity pipe sheath meets the electrical requirement so as to ensure the insulation of the two pull rods in the double-cavity pipe sheath.

10. The electric bipolar thermal biopsy forceps for an endoscope according to claim 1, characterized in that: the two limiting blocks extend out of the parts outside the double-cavity pipe sheath, and except for the parts where the two limiting blocks are connected with the upper claw tongs and the lower claw tongs, an insulating coating is sprayed on the surface of the parts, so that the insulating and pressure-resistant performance between the two limiting blocks is ensured to meet the electrical requirements.