阅读说明：本技术 一种消化内镜下异物取出爪 (Foreign matter takes out claw under digestion scope ) 是由 闫飞虎 卞承玲 谢飘 边冬冬 王振 施赟杰 陈炳辰 徐晓东 王颢 吕桂芬 于恩达 于 2020-03-20 设计创作，主要内容包括：本发明涉及一种消化内镜下异物取出爪,包括手柄和鞘管；所述手柄尾部固定所述鞘管的近端,所述鞘管内穿设导丝；所述手柄上设置滑轨,所述滑轨上滑设用于回拉或推动导丝在鞘管内移动的指环；所述指环固定所述导丝的近端；所述导丝的远端位置连接捕获伞,所述捕获伞为所述导丝周向均匀设置并具有弹性的钩爪,所述钩爪在所述鞘管中的初始状态为钩背朝向导丝,所述钩爪在所述鞘管外的松弛状态下的钩尖朝向导丝的延伸并在钩尖处对顶。本发明的有益效果是对于距离自然腔道出口较远处的息肉等异物,如无法用常规器械经钳道取出或吸出情况下,可用该装置尝试不退镜、少退镜的情况下实现快速、安全取出。(The invention relates to a foreign body taking-out claw under a digestive endoscope, which comprises a handle and a sheath tube; the tail part of the handle is fixed at the near end of the sheath tube, and a guide wire is arranged in the sheath tube in a penetrating way; the handle is provided with a slide rail, and a finger ring for pulling back or pushing the guide wire to move in the sheath tube is arranged on the slide rail in a sliding manner; the finger ring fixes the proximal end of the guide wire; the far-end position of seal wire connects and catches the umbrella, catch the umbrella for seal wire circumference evenly sets up and have elastic hook, the initial state of hook in the sheath pipe is the hook back towards the seal wire, the hook point of hook under the lax state outside the sheath pipe is towards the extension of seal wire and is to the summit in hook point department. The invention has the advantages that the device can be used for quickly and safely taking out foreign bodies such as polyps and the like far away from the outlet of a natural cavity channel under the condition that the conventional instruments cannot be used for taking out or sucking out the foreign bodies through a forceps channel without withdrawing the endoscope or with few withdrawing the endoscope.)

1. A foreign body taking-out claw under a digestive endoscope is characterized by comprising a handle (1) and a sheath tube (3); the tail part of the handle (1) is fixed at the near end of the sheath tube (3), and a guide wire (5) is arranged in the sheath tube (3) in a penetrating way; a sliding rail (4) is arranged on the handle (1), and a ring (2) used for pulling back or pushing the guide wire to move in the sheath tube is arranged on the sliding rail (4) in a sliding way; the finger ring (2) fixes the near end of the guide wire (5); the distal end position of seal wire (5) connects and catches umbrella (6), it does to catch umbrella (6) seal wire (5) circumference evenly sets up and have elastic hook, the hook is in initial condition in sheath pipe (3) is the hook back towards the seal wire, the hook is in the extension of the prong under the lax state outside sheath pipe (3) towards the seal wire and opposite vertex in the prong department.

2. The foreign matter removing claw under a digestive endoscope according to claim 1, wherein the inner diameter of the sheath tube (3) at a distal end position is increased to accommodate an umbrella chamber (7) for catching the umbrella.

3. The foreign body taking-out claw under a digestive endoscope according to claim 1, wherein the umbrella chamber (7) is made of transparent polyester.

4. The foreign matter taking-out claw under a digestive endoscope is characterized in that a hole is formed in the finger ring (2), an insertion block is inserted into the hole, and the near end of the guide wire (5) is fixed with the insertion block.

5. The foreign matter removing claw under a digestive endoscope according to claim 1, wherein the capturing umbrella (6) is in the shape of an eight-claw umbrella.

6. The foreign matter removing claw under a digestive endoscope according to claim 1, wherein the hook tip of the hook claw is serrated.

7. The foreign body removing claw under a digestive endoscope according to claim 1, wherein the capturing umbrella (6) is made of nitinol.

8. The foreign matter removing claw under a digestive endoscope according to claim 1, wherein the sheath tube (3) is made of transparent polyester.

9. A foreign matter removal claw under a digestive endoscope according to claim 1, wherein a guide wire extension for abutting against the foreign matter is provided at a position where a distal end of the guide wire (5) exceeds the capturing umbrella (6).

Technical Field

The invention relates to the technical field of medical instruments, in particular to a device for taking out various foreign bodies such as foreign bodies in stomach and esophagus, particularly small intestine and colon, excised pathological tissues or polyp and the like.

Background

Polyps of the digestive tract are clinically common diseases, particularly colonic polyps which are most common and can also be seen in the stomach, esophagus, duodenum and small intestine. As precancerous lesion, most of the digestive tract polyps can be malignant if not intervened, so that the incidence of malignant digestive tract tumors can be obviously reduced by early diagnosis and early treatment of the digestive tract polyps under a digestive endoscope. At present, the method for removing polyps under an endoscope mainly comprises thermal biopsy forceps coagulation removal, thermal biopsy forceps burning removal, snare loop removal, submucosal resection (EMR), submucosal dissection (ESD) and the like. The problem of taking out a polyp specimen is related to the removal of the polyp after the polyp is removed. For small polyps, the small polyps can be directly taken out through a biopsy forceps and sucked out through a forceps channel, but for overlarge polyp specimens, the small polyp specimens cannot be completely clamped by the jaws of the biopsy forceps or cannot be taken out through the forceps channel simply through suction force, and at present, the following methods are mainly adopted: 1. pressing an endoscope suction button to suck the specimen to the lens, and completely withdrawing the endoscope to carry and take out the polyp; 2. metal snares or baskets, tucks, etc.; 3. grasping forceps, three-jaw forceps, four-jaw forceps, etc. The above commonly used methods have the following problems in clinical practice: 1. the operation risk, time consumption and pain of the patient are increased by repeating the operation of endoscope advancing and retracting; 2. the snare, the basket or the net bag are difficult to operate and difficult to get on the hand, polyp capture by applying the above instruments under the endoscope has huge challenges for endoscopic doctors with insufficient experience, repeated trying operation is required, even the operation cannot be realized, operation time and operation related risks are increased, and a target is often dropped off due to the fact that the side hole of the basket is too large in the process of withdrawing the endoscope; 3. all kinds of nippers can only grab the sample that relatively less and texture is soft partially, and carry the sample back at the in-process that moves of moving back the mirror, the sample condition of losing or the alimentary canal mucous membrane is hurt by the sharp lateral wall of nipper appears easily, to some intestines preparation relatively poor or advance the comparatively difficult patient of mirror itself, in case midway the sample drops to seek again or insert the mirror once more and look for, the condition can be very difficult even have the possibility of seeking the failure, lead to the unable recovery of precious pathology sample.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, solve the clinical problem of repeated operation of advancing and retreating the endoscope or repeated searching because of the loss of foreign matters, realize flexible capture of the foreign matters, facilitate taking out and simplify the operation.

In order to achieve the above purpose, the invention provides a foreign body taking-out claw under a digestive endoscope, which comprises a handle and a sheath tube; the tail part of the handle is fixed at the near end of the sheath tube, and a guide wire is arranged in the sheath tube in a penetrating way; the handle is provided with a slide rail, and a finger ring for pulling back or pushing the guide wire to move in the sheath tube is arranged on the slide rail in a sliding manner; the finger ring fixes the proximal end of the guide wire; the far-end position of seal wire connects and catches the umbrella, catch the umbrella for seal wire circumference evenly sets up and have elastic hook, the initial state of hook in the sheath pipe is the hook back towards the seal wire, the hook point of hook under the lax state outside the sheath pipe is towards the extension of seal wire and is to the summit in hook point department.

The sliding rail can be in various forms, such as a sliding groove, an I-shaped rail, a columnar profile area of a handle and the like. The capturing umbrella is an umbrella-shaped hooking structure and is used for capturing the target foreign matters, and the capturing umbrella can be opened to be an umbrella with a large opening and a small bottom, so that the capturing umbrella is convenient to occlude and grab the target foreign matters. The connection part of the hook claw and the guide wire has elasticity, so that the capturing umbrella is in a compressed state in the sheath tube and is in a relaxed state outside the sheath tube; the catching umbrella is butted at the hook tip in a loose state, so that foreign matters are accommodated in the space between the hook claws. The guide wire has certain rigidity and toughness, so that the guide wire can move back and forth along the sheath tube. The fixing between the tail part of the handle and the sheath tube can be in multiple forms, such as clamping, screwing and the like, and convenient disassembly and replacement can be realized when necessary.

Preferably, the inner diameter of the sheath at the distal end position is increased to accommodate an umbrella chamber for capturing an umbrella.

The umbrella chamber is communicated with the main body of the sheath tube, and the inner diameter of the umbrella chamber is larger than that of the main body of the sheath tube, so that the umbrella is better accommodated and compressed to be captured. The outer diameter of the umbrella chamber can generally be sized to fit through the endoscopic biopsy channel.

Preferably, the umbrella chamber is made of transparent polyester.

Preferably, a hole is formed in the ring, an insertion block is inserted into the hole, and the near end of the guide wire is fixed to the insertion block.

The insertion block is inserted into the hole to be fixed on the finger ring, so that the near end of the guide wire is fixed on the finger ring.

Preferably, the capturing umbrella is in an eight-claw shape.

In the eight-claw umbrella shape, each claw is a complete claw.

Preferably, the hook point of the hook claw is serrated.

The hook tip referred to herein may also be referred to as the jaw tip.

Preferably, the capturing umbrella is made of nickel-titanium alloy.

Preferably, the sheath tube is made of transparent polyester.

Preferably, the far end of the guide wire is provided with a guide wire extension section which is used for abutting against the foreign body and exceeds the position of the capturing umbrella.

The guide wire extension section referred to herein is a solid guide wire section from which the guide wire continues to extend after being connected with the capturing umbrella part, and the length of the guide wire extension section can be selected among different specifications according to objective conditions such as the surgical site, the size of the captured object and the like, so that accurate positioning is realized.

The guide wire penetrates out of the proximal end of the sheath tube and is connected to the finger ring, so that the finger ring can move on the sliding rail and can drive the guide wire to move back and forth in the sheath tube. The capturing umbrella is divided into three states in the guide wire running process; initially, the hook claws are accommodated in a sheath tube or a far-end umbrella chamber in a back-to-back compressed state; when the guide wire is pushed forwards and the capturing umbrella is moved out of the sheath tube or the umbrella bin, the capturing umbrella is quickly deformed to a loose state due to elasticity, and foreign matters are accommodated; when the guide wire is pulled back, the loose state of the capturing umbrella is compressed and contracted, so that the capturing umbrella can be recovered into a sheath tube or an umbrella bin. The capturing umbrella can have certain cutting or bonding releasing capacity due to the impact force when the capturing umbrella is elastically and rapidly deformed to a relaxed state.

Through setting up the umbrella storehouse, can set up more nimble and catch umbrella appearance size, promote the volume of catching the umbrella as far as possible. Meanwhile, due to the design of the umbrella chamber, the problem of overlarge friction force between the umbrella chamber and the biopsy channel caused by thickening of the full length of the sheath tube is avoided, and the operation of putting in and pulling out the device is convenient to realize. The umbrella chamber not only plays a role of accommodating and capturing the umbrella, but also has enough strength to support the deformation and compression of the capturing umbrella when accommodating and recovering objects.

Due to the arrangement of the insertion block, the connection or the unlocking of the guide wire and the finger ring can be conveniently converted, and the finger ring and the handle can be conveniently recycled.

The capturing umbrella is in an eight-claw shape, and the object is stressed symmetrically after being grasped, is exactly occluded and is not easy to fall off.

The hook point of the capturing umbrella is in a zigzag design, so that the friction force and the grasping reliability during object holding are increased, the target object is prevented from falling off, and the operation success rate is increased.

The nickel-titanium alloy material of the capturing umbrella has the strength, elasticity and folding resistance which all meet the requirements of the capturing umbrella, and the capturing umbrella can be opened and closed repeatedly in the same diagnosis and treatment operation process of the same patient.

The sheath tube is made of transparent polyester materials, so that the sheath tube is small in friction force, high in strength, not prone to deformation, convenient to reuse and easy to observe by an operator.

Through setting up the seal wire extension segment, can let catch umbrella accurate positioning, catch the target object.

The invention has the advantages that for foreign bodies such as polyps and the like far away from the outlet of a natural cavity, if the foreign bodies cannot be taken out or sucked out through a forceps channel by using a conventional instrument, the device can be used for trying to realize quick and safe taking out under the conditions of no lens withdrawal and less lens withdrawal.

Drawings

FIG. 1 is a schematic view of an entire foreign matter removing claw under a digestive endoscope according to the present invention;

FIG. 2 is a schematic view showing an initial state of a capturing umbrella in a foreign matter removing claw under a digestive endoscope according to the present invention;

FIG. 3 is a schematic view showing a state where a capturing umbrella is loosened in a foreign matter removing claw under a digestive endoscope according to the present invention;

FIG. 4 is a schematic view of the foreign matter in the digestive endoscope taken out of the capturing umbrella and then being stored and compressed;

FIG. 5 is a front view of the foreign matter removing claw capturing umbrella in an open state according to the present invention;

FIG. 6 is a schematic view showing a half-occluded state of a capturing umbrella of the foreign matter removing claw under the digestive endoscope according to the present invention;

wherein:

1-handle 2-finger ring 3-sheath tube

4-slide rail 5-guide wire 6-capturing umbrella

7-umbrella chamber

Detailed Description

The invention is further described below with reference to the following figures and specific examples.

The foreign body taking-out claw for the digestion endoscope comprises a handle 1 and a sheath 3; the tail part of the handle 1 is fixed at the near end of the sheath tube 3, and a guide wire 5 is arranged in the sheath tube 3 in a penetrating way; the handle 1 is provided with a slide rail 4, and the slide rail 4 is provided with a finger ring 2 which is used for pulling back or pushing the guide wire to move in the sheath tube in a sliding way; the ring 2 fixes the near end of the guide wire 5, a hole is formed in the ring 2, an insertion block is inserted into the hole, and the near end of the guide wire 5 is fixed with the insertion block; the far-end position of seal wire 5 connects and catches umbrella 6, catch umbrella 6 for seal wire 5 circumference evenly sets up and have elastic hook, the hook is in the initial condition in sheath 3 is the hook back towards the seal wire, the hook point of hook under the lax state outside the sheath 3 is towards the extension of seal wire and opposite vertex in the hook point department.

The inner diameter of the sheath tube 3 at the far end position is increased to accommodate an umbrella chamber 7 for capturing the umbrella. The sheath tube 3 and the umbrella chamber 7 are made of transparent polyester materials.

The capturing umbrella 6 is in an eight-claw shape, the hook tip of each hook claw is in a sawtooth shape, and the capturing umbrella 6 is made of nickel-titanium alloy. The far end of the guide wire 5 exceeds the position of the capturing umbrella 6 and is provided with a guide wire extension section for abutting against foreign matters.

The specific use and construction sizes are as follows: the handle 1 is provided with a sliding rail 4 in the form of a sliding groove, the length of the sliding groove is 1cm, the length is also the effective working length of the capturing umbrella 6, and the handle 1 is connected with the sheath tube 3 through a connecting tube. The ring 2 slides and drives the guide wire 5 to synchronously move. The length of the umbrella chamber 7 is 1cm, and phi is 3.5 mm. The length of the hook claw is 1cm, and the maximum opening angle is 60 degrees. The length of the guide wire extension section can adopt the length specification of 3-8mm to adapt to foreign bodies with different sizes

When in use: after the target foreign body to be removed, such as a resected polyp, is identified, the device is placed through the endoscopic forceps channel. After the foreign matter is attached, the guide wire extension section is abutted against and accurately locks the foreign matter, the finger ring 2 is pushed towards the far end direction of the guide wire 5, the capturing umbrella 6 is driven to come out of the capturing umbrella bin 7 by the guide wire 5, and at the moment, the capturing umbrella 6 is rapidly converted from the state shown in the figure 2 to the state shown in the figure 3. Then, the finger ring 2 is slid towards the handle 1, the capturing umbrella 6 is driven to be tightened through the guide wire 5, and the foreign body is tightly held. This time is divided into two cases:

1. polyps with relatively small volume can be directly and completely collected into the capturing umbrella 6, meanwhile, the capturing umbrella 6 enters the capturing umbrella chamber 7, and at the moment, the device can be withdrawn without the need of a lens withdrawing operation, and foreign matters are recovered, as shown in figure 4.

2. To the great foreign matter of volume relatively, its unable complete income catches umbrella 6, keeps the continuous effort of ring 2 to handle 1 direction this moment on one side, ensures to catch umbrella 6 and is in half interlock state, definitely catches the foreign matter, effectively prevents to drop, can carry out comparatively fast this moment and move back mirror operation, takes out comparatively huge foreign matter smoothly, as shown in fig. 6.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments disclosed, but is capable of numerous equivalents and substitutions, all of which are within the scope of the invention as defined by the appended claims.