WO2022052757A1

WO2022052757A1 - Object removing apparatus and medical device

Info

Publication number: WO2022052757A1
Application number: PCT/CN2021/113104
Authority: WO
Inventors: 刘祉序
Original assignee: 南微医学科技股份有限公司
Priority date: 2020-09-14
Filing date: 2021-08-17
Publication date: 2022-03-17
Also published as: CN111938751A

Abstract

An object removing apparatus and a medical device, relating to the technical field of medical instruments. The object removing apparatus (100) comprises a connector (110), an inhaul cable member (120), and an object removing portion (130). The connector (110) is provided with an accommodating cavity (113) and a distant-end opening (1131) communicated with the accommodating cavity (113), and the accommodating cavity (113) is used for accommodating the object removing portion (130). The inhaul cable member (120) is used for driving the object removing portion (130) to slide with respect to the accommodating cavity (113) so that the object removing portion (130) can enter and exit the accommodating cavity (113) from the distant-end opening. Compared with the existing object removing apparatuses, in the present object removing apparatus (100), a tube sheath structure is not needed, so that an object removing portion having a larger size can be used to clamp a foreign matter having a larger size. During use, the distant-end opening (1131) of the accommodating cavity (113) is communicated with a channel of a visualization apparatus (such as a choledochoscope), and the channel of the visualization apparatus serves as an outer tube sheath; the visualization apparatus and the object removing apparatus (100) are inserted into a duodenoscope at the same time, and an operation can be performed in a visual state by means of a visual function of the visualization apparatus, so that an operation difficulty is low.

Description

A kind of extracting device and medical equipment

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese Patent Application No. 2020109598779, which was filed with the China Patent Office on September 14, 2020, and is entitled "A Device for Removing Objects and Medical Equipment", the entire contents of which are incorporated herein by reference. .

technical field

The present disclosure relates to the technical field of medical devices, and in particular, to a device for extracting objects and medical equipment.

Background technique

When there is a foreign body in the human body, it is often necessary to remove the foreign body through instruments. For example, the traditional stone extraction basket is ERCP surgery (Endoscopic Retrograde Cholangiopancreatography, which is a minimally invasive surgery performed with endoscopy, commonly used for A commonly used instrument for removing lesions, taking stones, etc. in the bile duct and pancreatic duct), it has a handle, an outer tube arranged on the handle, and a material extraction part that passes through the outer tube. During the operation, the outer tube of the stone retrieval basket enters the patient's body through a duodenoscope, and is observed by X-ray angiography.

However, the way of performing surgical operations under the irradiation of X-rays is less intuitive, more difficult to operate, and requires a high level of experience and technology for doctors. greater risk.

In view of the above problems, instruments with optical vision functions such as choledochoscope are currently used to avoid determining the state of the human body cavity through X-rays. During the operation, first insert the choledochoscope into the duodenoscope. After the observation is completed, take out the choledochoscope and insert the mesh basket into the duodenoscope for grasping operation. Grab, difficult to operate.

SUMMARY OF THE INVENTION

The objects of the present disclosure include, for example, to provide a device for extracting objects, which can improve the technical problem that the operation process of extracting objects cannot be directly observed in the prior art.

The purpose of the present disclosure also includes, for example, providing a medical device, which can improve the technical problem that the operation process of extracting objects cannot be directly observed in the prior art.

Embodiments of the present disclosure can be implemented as follows:

An embodiment of the present disclosure provides an object retrieval device, which includes a connector, a cable member, and an object retrieval portion; the object retrieval portion is disposed at the distal end of the cable member, and the connector is provided with a accommodating cavity and a distal opening communicated with the accommodating cavity, the accommodating cavity is used for accommodating the fetching part, and the pulling cable is used to drive the fetching part to move relative to the accommodating cavity, so as to The retrieval portion is moved into and out of the receiving cavity from the distal opening.

In one or more embodiments, the distal end of the connector is provided with a first connecting part, the first connecting part is used for connecting with a visualization device, and the accommodating cavity is used for connecting with a visualization device through the opening of the distal end. The channels of the visualization device communicate.

In one or more embodiments, the first connection is a luer connector.

In one or more embodiments, the first connecting portion is detachably connected to the connector.

In one or more embodiments, the luer connector includes a first annular member and a second annular member, the first annular member is sleeved on the second annular member, and the first annular member is connected to the second annular member. A snap groove for connecting with the visualization device is formed between the second ring members; an anti-slip protrusion is provided on the outer peripheral wall of the first ring member.

In one or more embodiments, the extracting device further includes a sealing member, the sealing member is disposed in the clamping groove and used to seal the gap between the visualization device and the clamping groove .

In one or more embodiments, the retrieval device further includes a heat shrinkable tube, and the heat shrinkable tube is wrapped around the cable member.

In one or more embodiments, the heat shrinkable tube is made of polytetrafluoroethylene.

In one or more embodiments, the cable member includes a hard cable portion and a soft cable portion, the distal end of the hard cable portion is fixedly connected with the proximal end of the soft cable portion, the The distal end of the soft cable part is fixedly connected with the object retrieval part, and the heat shrinkable tube covers the hard cable part and the soft cable part.

In one or more embodiments, the soft cable part and the object retrieval part are integrally provided.

In one or more embodiments, the extracting part includes an end and a plurality of wire parts, the proximal ends of the plurality of wire parts are fixedly connected to the cable, and the distal ends of the plurality of wire parts are fixedly connected to the cable. tethered to the end.

In one or more embodiments, the pick-up portion includes a plurality of basket wires, each of the basket wires forms a wire portion, and the distal ends of the plurality of basket wires are fixed to the wire portion by welding. the end.

In one or more embodiments, the pick-up part comprises a basket wire, the end has a bending hole, and the basket wire passes through the bending hole to be connected with the end, And each of the basket wires is bent to form at least two wire portions.

In one or more embodiments, the end head includes a tube part and a head part, and the distal ends of the plurality of wire parts are bundled in the tube part; the head part is fixedly connected to the tube part. Distal, the radial dimension of the head gradually decreases in the direction from the proximal end to the distal end of the tip.

In one or more embodiments, the retrieval part includes a flexible membrane and a plurality of support parts, the proximal ends of the plurality of support parts are all fixedly connected with the cable member, and the The distal ends are all connected with the flexible membrane, and the distal ends of the supporting portions are arranged in sequence along the circumferential direction of the flexible membrane.

In one or more embodiments, two adjacent support parts form an opening, the flexible film covers at least one of the openings, and at least one of the openings is in an open state.

In one or more embodiments, the connector is further provided with a liquid injection hole communicating with the accommodating cavity, and the extending direction of the liquid injection hole is inclined relative to the extending direction of the accommodating cavity, and is along the In the direction from the proximal end to the distal end of the connector, the distance between the liquid injection hole and the accommodating cavity decreases.

In one or more embodiments, a locking member is provided at the proximal end of the connector, and the locking member can be switched between a locked state and an unlocked state; the cable member passes through the locking member ;

When the locking member is in the locked state, the cable member is fixed relative to the connector; when the locking member is in the unlocked state, the cable member can be relative to the connector move.

Embodiments of the present disclosure also provide a medical device. The medical device includes an object extraction device, and the object extraction device includes a connector, a cable member, and an object extraction portion; the object extraction portion is arranged at the distal end of the cable member, and the connector is provided with a accommodating cavity and a connection with the object. A distal opening communicated with the accommodating cavity, the accommodating cavity is used for accommodating the retrieving part, and the pulling cable is used to drive the retrieving part to move relative to the accommodating cavity, so that the The retrieval part enters and exits the accommodating cavity from the distal opening.

The beneficial effects of the extracting device and the medical equipment according to the embodiments of the present disclosure include, for example:

Embodiments of the present disclosure provide an object retrieval device, which includes a connector, a cable member, and an object retrieval portion. The picking part is arranged at the distal end of the cable member, and can move synchronously with the cable member. An accommodating cavity and a distal end opening communicating with the accommodating cavity are arranged in the connector, and the accommodating cavity is used for accommodating the fetching part. The pulling cable is used to drive the fetching part to move relative to the accommodating cavity, so that the fetching part enters and leaves the accommodating cavity from the distal opening. The connector of the extracting device can be used as a handle, and at the same time, a containing cavity for accommodating the extracting part is provided in the connector, and the distal opening of the containing cavity can be communicated with a visualization device (such as a choledochoscope) during use, so that The retrieval device can use the channel of the visualization device as the outer tube sheath, and the retrieval device can be inserted into the duodenoscope at the same time as the visualization device. Using the visual function of the visualization device, the operation process of the retrieval device can be directly observed. It has high performance and helps to reduce the difficulty of operation, and it does not need to be operated under X-rays, which avoids various risks brought by X-ray radiation to doctors and patients.

The embodiments of the present disclosure also provide a medical device, which includes the above-mentioned object retrieval device, and thus also has the beneficial effects of being able to directly observe the operation process, reducing the difficulty of operation, and being able to avoid various risks brought by radiation to doctors and patients. .

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present disclosure more clearly, the following briefly introduces the accompanying drawings that need to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic diagram of the overall structure of a fetching device provided by an embodiment of the present disclosure;

Fig. 2 is the partial structure schematic diagram of II in Fig. 1;

FIG. 3 is a schematic structural diagram of a connector in an object retrieval device provided by an embodiment of the present disclosure;

4 is a schematic diagram of the overall structure of the object extraction device provided by the embodiment of the present disclosure when the object extraction portion is in an expanded state;

FIG. 5 is a schematic structural diagram of an object extraction part in an object extraction device provided by an embodiment of the present disclosure;

6 is a schematic cross-sectional view of the partial structure of the extracting part in the extracting device provided by the embodiment of the present disclosure;

7 is a schematic cross-sectional view of a partial structure of a cable member in a retrieval device according to an embodiment of the present disclosure;

FIG. 8 is a schematic partial structure diagram of another object extraction device provided by an embodiment of the present disclosure.

Icon: 100-extraction device; 110-connector; 111-body; 1111-first end; 1112-second end; 112-arm; 113-accommodating cavity; 1131-distal opening; 114-liquid injection hole 115 - necking; 116 - first connecting part; 1161 - first ring part; 1162 - second ring part; 1163 - snap groove; 1164 - anti-skid protrusion; ; 120 - cable piece; 121 - hard cable part; 122 - soft cable part; 123 - connecting tube; 124 - heat shrink tube; 1331-insertion hole; 1332-through hole; 134-tube part; 135-head part; 136-support part; 137-flexible membrane; 138-opening; 140-operating head;

detailed description

In order to make the purposes, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments These are some, but not all, embodiments of the present disclosure. The components of the disclosed embodiments generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the disclosure provided in the accompanying drawings is not intended to limit the scope of the disclosure as claimed, but is merely representative of selected embodiments of the disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present disclosure, it should be noted that, if the terms "upper", "lower", "inner", "outer", etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, or It is the usual orientation or positional relationship when the disclosed product is used, which is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation , and therefore should not be construed as a limitation of the present disclosure.

In addition, where the terms "first", "second" and the like appear, they are only used to differentiate the description, and should not be construed as indicating or implying relative importance.

It should be noted that the features in the embodiments of the present disclosure may be combined with each other without conflict.

The traditional object retrieval device has the problems that the operation process cannot be directly viewed and the operation is difficult. The object retrieval device 100 provided in this embodiment can improve this problem. The object retrieval device 100 provided in this embodiment will be described in detail below. .

FIG. 1 is a schematic diagram of the overall structure of the extracting device 100 provided in this embodiment, and FIG. 2 is a schematic diagram of a partial structure of the position II in FIG. 1 . Please refer to FIG. 1 and FIG. 2 in combination, this embodiment provides a device 100 for extracting objects, and correspondingly, a medical device is provided.

The medical device includes a retrieval device 100, and at the same time, the medical device also includes a visualization device. Optionally, the visualization device is a choledochoscope (not shown in the figure), and the channel of the visualization device is the clamp channel of the choledochoscope. Taking choledochoscopy as an example, the process of using the visualization device with the extraction device 100 will be described. The distal end of the choledochoscope is installed and fixed with the proximal end of the choledochoscope, so that the forceps channel of the choledochoscope is communicated with the choledochoscope 100, so that the forceps channel of the choledochoscope is used as the outer tube sheath, and the extraction part of the choledochoscope 100 The 130 can be inserted into the human body along with the forceps to grasp foreign objects. At the same time, the choledochoscope can realize the intuitive observation of the operation process, and it does not need to be operated under X-rays, so as to avoid the adverse effects of radiation caused by X-rays.

The object retrieval device 100 includes a connector 110 , a cable member 120 and an object retrieval portion 130 . The retrieval part 130 is disposed at the distal end of the cable member 120 and can move synchronously with the cable member 120 . The connector 110 is provided with an accommodating cavity 113 and a distal opening 1131 communicating with the accommodating cavity 113 , and the accommodating cavity 113 is used for accommodating the picking part 130 . The pulling cable member 120 is used to drive the retrieval part 130 to move relative to the accommodating cavity 113 , so that the retrieval part 130 can enter and exit the accommodating cavity 113 from the distal opening 1131 . The connector 110 of the extracting device 100 can be used as a handle, and at the same time, by arranging a containing cavity 113 for containing the extracting part 130 in the connector 110, the distal opening 1131 of the containing cavity 113 can be connected with the choledochoscope during use. The forceps channel is connected, and the forceps channel of the choledochoscope is used as the outer tube sheath. The extraction device can be inserted into the duodenoscope at the same time as the choledochoscope, so that the operation process can be directly observed under the action of the choledochoscope. It helps to reduce the difficulty of operation, and does not need to operate under X-rays, which avoids various risks to doctors and patients caused by X-ray radiation.

The object retrieval device 100 provided by this embodiment is further described below:

FIG. 3 is a schematic structural diagram of the connector 110 in the extracting device 100 provided in this embodiment. 1-3, in this embodiment, the connector 110 includes a columnar body 111, the body 111 has two ends along its center line, a first end 1111 and a second end 1112, respectively, the first end 1111 That is, the proximal end of the connector 110 , and the second end 1112 is the distal end of the connector 110 . The accommodating cavity 113 is a through hole extending along the centerline of the main body 111 , that is, the accommodating cavity 113 is open at both ends of the main body 111 along the centerline.

Specifically, the accommodating cavity 113 is a circular hole cavity, and the extending direction of the accommodating cavity 113 is the axial direction of the accommodating cavity 113 . The two ends of the center line of the main body 111 are the proximal end and the distal end of the main body 111 . The extracting part 130 can be switched between a contracted state and an expanded state, and the extracting part 130 is accommodated in the accommodating cavity 113 in a contracted state, so as to reduce the volume of the extracting part 130 when it is located in the accommodating cavity 113 , thereby contributing to the The volume of the main body 111 is reduced.

It should be noted that, in the description of this embodiment, the "distal end" refers to the end of the component that is close to the inside of the human body when in use, and correspondingly, the "proximal end" refers to the end of the component that is far away from the human body when in use, such as the extraction device 100 When in use, the object-removing part 130 is inserted into the human body to grasp foreign objects, so the end of the main body 111 for the object-removing part 130 to enter and exit the accommodating cavity 113 is the distal end of the main body 111 , and the cable member 120 is connected to the object-receiving part 130 One end is the distal end of the cable member 120 .

When the retrieval part 130 is accommodated in the accommodating cavity 113 in a retracted state, the retrieval part 130 is located at the distal end of the accommodating cavity 113 (as shown in FIG. 1 and FIG. The proximal end extends into the accommodating cavity 113 and is fixedly connected with the retrieval part 130 , so that the retrieval part 130 is moved by the sliding of the cable member 120 along the axis of the accommodating cavity 113 , so that the retrieval part 130 can move from the distal end of the accommodating cavity 113 The opening 1131 extends or retracts from the accommodating cavity 113 . The distal opening 1131 is the opening at the distal end of the accommodating cavity 113 .

Optionally, the connector 110 is also provided with a liquid injection hole 114, and the liquid injection hole 114 is communicated with the accommodating cavity 113. When in use, the accommodating cavity 113 is communicated with the forceps channel of the choledochoscope through the distal opening 1131, so that the liquid injection hole 113 is connected to the choledochoscope. 114 is communicated with the forceps channel of the choledochoscope, and the liquid such as normal saline entering the liquid injection hole 114 can pass through the accommodating cavity 113 and enter the human body through the forceps channel. Specifically, the connector 110 further includes a support arm 112 fixedly connected with the main body 111 , the center line of the support arm 112 is inclined relative to the center line of the main body 111 , thus forming a "Y"-shaped connector 110 . The liquid injection hole 114 is a through hole extending along the center line of the support arm 112 , and the extending direction of the liquid injection hole 114 is the axial direction of the liquid injection hole 114 . Therefore, the axis of the liquid injection hole 114 is relative to the axis of the accommodating cavity 113 Tilt setting. At the same time, along the direction from the proximal end to the distal end of the connector 110 , the distance between the liquid injection hole 114 and the accommodating cavity 113 gradually decreases, so that the liquid flowing along the liquid injection hole 114 flows into the accommodating cavity 113 and has a direction toward the accommodating cavity 113 . The partial velocity of the flow of the distal opening 1131 of the 113, so that the liquid entering the accommodating cavity 113 can naturally flow to the distal opening 1131, and then flow into the human body through the forceps channel of the choledochoscope. Optionally, the support arm 112 is integrally formed with the main body 111 .

Optionally, one end of the support arm 112 away from the main body 111 has a third connecting portion 118, through which the third connecting portion 118 is connected to the liquid supply member (not shown), so that the connector 110 and the liquid supply member are relatively fixed, At the same time, the liquid supply hole is communicated with the liquid supply member, so as to supply liquid through the liquid supply member.

Optionally, the proximal end of the accommodating cavity 113 is provided with a constriction 115 , and the radial dimension of the constriction 115 is smaller than that of the accommodating cavity 113 , so that the movement of the cable member 120 passing through the constriction 115 is more reliable. Optionally, the connector 110 is further provided with a connecting surface connecting the inner peripheral wall of the constriction 115 and the inner peripheral wall of the accommodating cavity 113 , the connecting surface is a conical surface, and the large end of the conical surface is connected with the inner peripheral wall of the accommodating cavity 113 , The small end of the tapered surface is connected to the inner peripheral wall of the constriction 115 .

Please refer to FIG. 1 and FIG. 3 , in this embodiment, the distal end of the connector 110 is provided with a first connecting part 116 , and the first connecting part 116 is used for connecting with the choledochoscope, so that the connector 110 is fixed relative to the choledochoscope , the distal opening 1131 is opened in the first connecting part 116 , and at this time, the accommodating cavity 113 communicates with the forceps channel of the choledochoscope through the distal opening 1131 . Specifically, the first connection portion 116 is a Luer connector, and the connector 110 and the choledochoscope are detachably connected through the connection between the Luer connector and the connector on the choledochoscope. It can be understood that in other embodiments, the structure of the first connecting portion 116 can also be specifically set according to requirements, and the connector 110 and the choledochoscope can be relatively fixed by connecting the first connecting portion 116 and the choledochoscope.

Optionally, the luer connector includes a first annular member 1161 and a second annular member 1162 , the first annular member 1161 is sleeved with the second annular member 1162 , in other words, the inner diameter of the first annular member 1161 is larger than the outer diameter of the second annular member 1162 path. The first annular member 1161 and the second annular member 1162 are spaced apart, so that a snap groove 1163 for connecting with the choledochoscope is formed between the first annular member 1161 and the second annular member 1162, specifically, the second annular member 1162 The inner hole of 113 is the distal end of the accommodating cavity 113 , and the distal opening 1131 of the accommodating cavity 113 is the distal opening of the inner hole of the second ring member 1162 . The joint of the choledochoscope has an annular protrusion matched with the snap groove 1163 . At the same time, the outer peripheral wall of the first ring member 1161 is also provided with anti-slip protrusions 1164 to prevent slippage during connection, so as to ensure the reliability of the connection between the luer connector and the choledochoscope. Specifically, the number of the anti-skid protrusions 1164 is plural, and the plurality of anti-skid protrusions 1164 are arranged in sequence along the circumferential direction of the first annular member 1161 . The anti-slip protrusions 1164 are bar-shaped protrusions extending along the axial direction of the first ring member 1161 .

It should be noted that the specific structure of the Luer connector is not set here. It can be understood that in other embodiments, the structure of the Luer connector can also be set to other existing structures, which can realize the connection with the bile duct. Connect the mirror.

Optionally, the extracting device 100 further includes a sealing member 1165 , and the sealing member 1165 is disposed in the clamping groove 1163 , so as to seal the gap between the choledochoscope and the clamping groove 1163 through the sealing member 1165 . Specifically, the sealing member 1165 is a sealing ring, and the inner diameter of the sealing ring matches the outer diameter of the second annular member 1162 , and the outer diameter of the sealing ring matches the outer diameter of the first annular member 1161 . The sealing member 1165 is arranged at the bottom of the snap groove 1163 .

In this embodiment, the luer connector is integrally formed at the distal end of the main body 111 of the connector 110 . It can be understood that in other embodiments, the first connecting portion 116 can also be configured to be detachably connected to the connector 110, so that the first connecting portion 116 matching the choledochoscope can be used for different choledochoscopes, so as to The connection between the choledochoscope and the connector 110 is realized, and the use adaptability is higher.

FIG. 4 is a schematic diagram of the overall structure of the extracting part 130 of the extracting device 100 provided in this embodiment when the extracting part 130 is in an expanded state. Please refer to FIG. 1 , FIG. 2 and FIG. 4 in combination. In this embodiment, the object fetching portion 130 can be switched between a contracted state and an expanded state. Specifically, when the extracting portion 130 is located in the tunnel, the extracting portion 130 is in a retracted state due to the limitation of the radial dimension of the extracting portion 130 by the tunnel. The limiting effect of the 130 disappears, and the extracting part 130 expands outward to an expanded state, so as to perform the stone extraction operation. For example, when the choledochoscope forceps channel is in communication with the accommodating cavity 113, the extracting portion 130 is in the retracted state when it is in the receiving cavity 113 and when the object extracting portion 130 extends out of the receiving cavity 113 and is located in the choledochoscope forceps channel, and the object extracting portion 130 extends It is in an expanded state after exiting the choledochoscope.

Since the object retrieval device 100 provided in this embodiment does not have an outer tube, in other words, the object retrieval device 100 provided in this embodiment may only be composed of a connector 110, a cable member 120, and an object retrieval portion 130. The forceps channel is used as the outer tube sheath, so the maximum inner diameter of the extraction portion 130 in the retracted state needs to be adapted to the inner diameter of the forceps channel of the choledochoscope, so that the retraction portion 130 in the retracted state can smoothly pass through the forceps of the choledochoscope. The Tao extends into the human body.

Optionally, the retrieval device 100 further includes an operation head 140 fixed on the proximal end of the cable member 120, and the operation head 140 can drive the cable member 120 to move relative to the connector 110 through the operation head 140, thereby driving the retrieval part 130 to move to Perform a stone extraction operation or recover the extraction part 130 back into the connector 110 .

Optionally, the proximal end of the connector 110 is further provided with a locking member 150 , and the cable member 120 passes through the locking member 150 to allow the distal end of the cable member 120 to extend into the accommodating cavity 113 of the connector 110 . The locking member 150 can be switched between the locked state and the unlocked state. When the locking member 150 is in the locked state, the cable member 120 is fixed relative to the connector 110; when the locking member 150 is in the unlocked state, the cable member 120 can It moves relative to the connector 110 , thereby driving the pick-up part 130 into the accommodating cavity 113 or extending out of the accommodating cavity 113 .

Optionally, the proximal end of the main body 111 is provided with a second connecting portion, and the locking member 150 is movably connected with the second connecting portion, so that the locking member 150 can be switched between a locked state and an unlocked state. Specifically, the second connecting portion is an external thread provided at the proximal end of the main body 111 of the connector 110 , the locking member 150 has an internal thread, and the second connecting portion and the locking member 150 are realized by screwing the internal thread and the external thread. Connection. At the same time, a rubber washer (not shown in the figure) is provided in the locking member 150, and the rubber washer is passed through the cable member 120. When the locking member 150 is screwed, the rubber washer is squeezed and deformed to reduce the inner diameter of the rubber washer, thereby reducing the inner diameter of the rubber washer. Clamp the cable member 120 through the rubber washer, and the locking member 150 is in a locked state at this time; when the locking member 150 is loosened, the pressing force on the rubber washer is eliminated, and the rubber washer is reset to make the inner diameter of the rubber washer After reset, the cable member 120 passing through the rubber washer is released, and the cable member 120 can move relative to the rubber washer, thereby realizing the movement of the cable member 120 relative to the connector 110, and the locking member 150 is in an unlocked state.

FIG. 5 is a schematic structural diagram of the object extraction part 130 in the object extraction device 100 provided in this embodiment, and the object extraction part 130 is in an expanded state at this time. Please refer to FIG. 4 and FIG. 5 in combination, in the object extraction device 100 provided in this embodiment, only the object extraction portion 130 and the part of the pulling cable member 120 extend into the endoscope forceps so as to extend into the human body. Compared with the prior art By setting the structure of the outer tube and the outer tube extending into the human body, the radial dimension of the part of the extracting device 100 extending into the human body is greatly reduced, so that the extracting part 130 of a larger size can be extended into the human body, in order to grasp the large-sized extracting part 130 foreign bodies are possible.

Please continue to refer to FIG. 4 and FIG. 5 , in this embodiment, the extraction part 130 is a stone extraction mesh basket, that is, the extraction part 130 is used to perform a stone extraction operation, that is, the foreign body taken out from the human body is a stone at this time. It is understandable In other embodiments, the structure of the extracting part 130 can also be set according to requirements, such as a foreign body net bag, a foreign body ferrule, etc., so that the object extracting part 130 can take out other foreign objects from the human body, such as cut human tissue and the like.

Optionally, the extracting portion 130 includes a plurality of wire portions 131, and the plurality of wire portions 131 are spirally wound to form a basket shape. Specifically, the number of the wire portions 131 is four. It can be understood that, in other embodiments, the number of the wire portions 131 can also be specifically set according to requirements, for example, six.

At the same time, it should be noted that the specific structure of the object fetching part 130 is not limited here. It is understood that in other embodiments, it can also be specifically set according to the requirements, for example, the wire part 131 is set to three-section type, a plurality of The wire portion 131 is arranged around the circumference to form a pick-up portion 130, and the two wire portions 131 are enclosed in a hexagonal shape, or the pick-up portion 130 can also be arranged into an umbrella shape, a colander shape, etc., or is arranged to be formed by a permeable membrane, etc. , the foreign objects in the human body can be taken out through the object taking part 130 .

FIG. 6 is a schematic cross-sectional view of a part of the structure of the extracting part 130 in the extracting device 100 provided in this embodiment. Please refer to FIG. 5 and FIG. 6 , in this embodiment, the extracting part 130 further includes an end head 133 , and the distal ends of the plurality of wire parts 131 are bundled at the end head 133 , so that the plurality of wire parts are collected by the end head 133 . The distal ends of 131 are secured together.

FIG. 7 is a schematic cross-sectional view of a part of the structure of the cable member 120 in the retrieval device 100 provided in this embodiment. Please refer to FIG. 1 , FIG. 2 , FIG. 4 and FIG. 7 , in this embodiment, the extracting device 100 further includes a heat-shrinkable tube 124 , and the heat-shrinkable tube 124 covers the cable member 120 , so that the cable member 120 is The surface of the duct is more flat and smooth, which can effectively increase the smoothness of the cable member 120 passing through the choledochoscope channel. Optionally, the heat-shrinkable tube 124 is made of polytetrafluoroethylene (PTFE). During processing, the heat-shrinkable tube 124 is fixed on the outer side of the cable member 120 by heat-shrink wrapping.

Specifically, the cable member 120 includes a hard cable portion 121 and a soft cable portion 122 . The distal end of the hard cable part 121 is fixedly connected to the proximal end of the soft cable part 122 , the distal end of the soft cable part 122 is fixedly connected to the retrieval part 130 , and the heat shrinkable tube 124 covers the hard cable part 121 and the soft cable part 122 . The cable portion 122 can effectively increase the smoothness of the hard cable portion 121 and the soft cable portion 122 passing through the forceps channel of the choledochoscope. Optionally, the cable member 120 further includes a connecting pipe 123 , and the hard cable portion 121 and the soft cable portion 122 are fixedly connected into one body through the connecting pipe 123 . Optionally, the hard cable portion 121 includes stainless steel wire, and the soft cable portion 122 includes Nitinol wire.

Optionally, the soft cable part 122 is integrally provided with the retrieval part 130 . Specifically, the distal ends of the plurality of wire portions 131 are bundled together by the ends 133 , the middle portions of the plurality of wire portions 131 are bundled together by the tightening tube 132 , and the proximal ends of the plurality of wire portions 131 are fixedly connected to the connecting tube 123. The part of the plurality of wire parts 131 located between the end head 133 and the tightening tube 132 is spirally formed to form an expandable extracting part 130, and the part of the plurality of wire parts 131 located between the tightening tube 132 and the connecting tube 123 is wound to form a soft pull Cable portion 122 . Since in this embodiment, the picking part 130 is formed by four wire parts 131 helically, correspondingly, the soft cable part 122 is also formed by winding the four wire parts 131 .

Optionally, the pick-up part 130 includes a basket wire, the end 133 has a bending hole, and the basket wire passes through the bending hole, which not only realizes the connection between the basket wire and the end head 133, but also passes through the basket wire. After the holes are bent, the holes are bent to form at least two wire portions 131 .

Specifically, the number of the basket wires is two, the end 133 is correspondingly provided with two bending holes, and the two basket wires are respectively penetrated with two bending holes, so that each basket wire is folded in half to form two Each wire portion 131 is thus formed to form a pick-up portion 130 having four wire portions. Optionally, the bending hole includes an insertion hole 1331 and a through hole 1332. The insertion hole 1331 and the through hole 1332 communicate with each other to form a U-shaped bending hole. When the basket wire enters the bending hole from the insertion hole 1331, along the The bending hole extends in a U-shape and then passes through the passing hole 1332 , thereby forming two wire portions 131 located at the proximal end of the end head 133 . In other words, the two wire portions 131 in the picking portion 130 of this embodiment can be regarded as different parts of the same basket wire.

It should be noted that the formation method of the wire portion 131 is not limited here. It can be understood that in other embodiments, the formation method of the wire portion 131 can also be set as required. For example, the number of basket wires can be set to One, one end of the basket wire is fixed to the connecting pipe 123, and the other end of the basket wire is wound back and forth between the connecting pipe 123 and the end 133, and finally fixed to the connecting pipe 123, through the winding of the basket wire Four wire parts 131 are formed between the connecting pipe 123 and the end 133, that is, the four wire parts 131 in the extraction part 130 can be regarded as different parts of the same basket wire; Set to correspond to the wire portion 131, each basket wire forms a wire portion 131, and the distal ends of the plurality of basket wires are welded and fixed to the end head 133. In this embodiment, the number of wire portions 131 is four, Correspondingly, the number of basket wires can be set to four.

Optionally, the material of the basket wire is metal, and specifically, the basket wire is a nickel-titanium alloy wire.

Optionally, the end head 133 includes a tube portion 134 and a head portion 135 , and the plurality of wire portions 131 are bundled in the tube portion 134 . The head 135 is fixedly connected to the distal end of the tube portion 134 , and the radial dimension of the head 135 gradually decreases along the direction from the proximal end to the distal end of the end head 133 .

Specifically, the pipe portion 134 has a plurality of bending holes for the basket wire to pass through, and the wire portion 131 is formed on both sides of the bending hole each time the basket wire is passed through a bending hole (as shown in FIG. 6 ). ). The outer peripheral surface of the head 135 is a tapered surface, that is, the cross section of the head 135 is circular, and the head 135 has opposite large ends and small ends, the large end is the proximal end of the head 135, and the small end is That is, the distal end of the head 135 . The outer diameter of the large end portion is larger than the outer diameter of the pipe portion 134 , so that the formed end head 133 has a mushroom shape. The small end is hemispherical, and the spherical surface and the conical surface of the small end are smoothly connected.

Optionally, the maximum outer diameter of the head 135 is D, 0.8mm≤D≤3mm, specifically, D may be 0.8mm, 1.0mm, 1.2mm, 1.6mm, 2.0mm, 2.4mm, 2.8mm or 3mm. At the same time, in order to ensure that the extracting part 130 can extend into the forceps channel of the choledochoscope, the maximum outer diameter of the head 135 should be smaller than the size of the forceps channel of the choledochoscope. Outer diameter D<2mm. Optionally, the maximum outer diameter of the head 135 is D, 1.0mm≤D≤1.2mm, specifically, D may be 1.0mm, 1.05mm, 1.1mm, 1.15mm or 1.2mm.

FIG. 8 is a schematic partial structure diagram of another object extraction device 100 provided in this embodiment. Please refer to FIG. 8 , the structure of the object extraction device 100 is substantially the same as the structure of the object extraction device 100 described above, and the difference is that the structure of the object extraction part 130 is different.

Specifically, the retrieval portion 130 includes a flexible membrane 137 and a plurality of support portions 136, and the proximal ends of the plurality of support portions 136 are all fixedly connected to the cable member 120. In this embodiment, the proximal ends of the support portions 136 are folded and fixed to Tighten tube 132. The distal ends of the plurality of supporting portions 136 are all connected to the flexible membrane 137, and the distal ends of the supporting portions 136 are arranged in sequence along the circumferential direction of the flexible membrane 137, thereby forming a substantially pyramid-shaped picking portion 130. The plurality of support parts 136 form the edges of the object extraction part 130 , and the flexible film 137 closes the bottom surface of the pyramid-shaped object extraction part 130 . Optionally, the support portion 136 is a metal wire, or the support portion 136 can also be regarded as a part of the metal wire that forms the cable member 120 protruding from the tightening tube 132 . When the extracting part 130 is in the expanded state, the structure of the extracting part 130 is as shown in FIG. 8 ; when the extracting part 130 is in the contracted state, the distal ends of the plurality of supporting parts 136 are close together to form a bundle.

In this embodiment, the number of the support parts 136 is five, and correspondingly, the formed picking part 130 is in the shape of a pentagonal pyramid. It can be understood that, in other embodiments, the number of the support parts 136 can also be set according to requirements, for example, the number of the support parts 136 is set to four or six.

Optionally, when the picking part 130 is in the expanded state as shown in FIG. 8 , two adjacent supporting parts 136 form openings 138 , the flexible film 137 covers at least one opening 138 , and at least one of the openings 138 is in an open state .

Specifically, the proximal ends of the two adjacent support parts 136 are closed and fixed to the tightening tube 132 , and the distance between the two adjacent support parts 136 increases along the direction from the proximal end to the distal end, thereby forming a wedge-shaped opening 138 . Since the number of the supporting parts 136 is five, the number of the openings 138 is correspondingly five, the flexible film 137 covers at least one opening 138, and at least one of the openings 138 is in an open state, that is, at least one opening 138 or at most The four openings 138 are covered by the flexible film 137, so that the openings 138 covered by the flexible film 137 are in a closed state, and the remaining openings 138 are in an open state, so that foreign matter can enter the picking part 130 through the openings 138 in the open state, This facilitates taking out the human body, and effectively prevents foreign objects from falling out of the object taking part 130 during the taking out process.

According to an object extraction device 100 provided in this embodiment, the working principle of the object extraction device 100 is:

When in use, first the extracting part 130 is in a retracted state and is accommodated in the accommodating cavity 113 (as shown in FIG. 1 ), and then the connector 110 is fixedly connected to the choledochoscope through the first connecting part 116 , and at this time the accommodating cavity 113 is connected to the choledochoscope. The forceps channel of the choledochoscope is connected, and the pulling cable 120 is controlled to move in the direction from the proximal end to the distal end by operating the operating head 140, thereby driving the extracting part 130 to leave the accommodation cavity 113 from the distal opening 1131 and enter the forceps channel of the choledochoscope, and then Continue to extend along the forceps channel of the choledochoscope until the extracting part 130 protrudes from the forceps channel of the choledochoscope, and expands to the expanded state as shown in FIG. Helps to reduce the difficulty of operation.

A device 100 for extracting objects provided in this embodiment has at least the following advantages:

The extracting device 100 provided by the embodiment of the present disclosure is provided by disposing the accommodating cavity 113 in the connector 110 to accommodate the extracting part 130 in the retracted state, and disposing the first connecting part 116 at the distal end of the connector 110, so as to use When the choledochoscope and the connector 110 are connected into one through the first connecting part 116, the forceps channel of the choledochoscope can be used as the outer tube sheath to guide the extraction part 130 to extend into the lesion of the human body. 130 can be accommodated in the accommodating cavity 113 in a contracted state. In this way, compared with the conventional extracting device 100 , the radial dimension of the extracting device 100 extending into the human body can be greatly reduced, and it is helpful to adopt a larger-sized extracting portion 130 to grasp a larger-sized foreign object. When grasping foreign bodies, the operation process can be directly viewed through the choledochoscope, which can reduce the difficulty of operation, thereby reducing the requirements for operators, completing the operation accurately and efficiently, and reducing the pain of patients.

Embodiments of the present disclosure also provide a medical device, which includes the above-mentioned object retrieval device 100 . Since the medical device includes the above-mentioned object retrieval device 100, it also has the beneficial effects that the operation can be performed under direct vision, the operation time is short, the operation effect is good, and the foreign body of a larger size can be grasped.

The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited to this. Any person skilled in the art who is familiar with the technical scope of the present disclosure can easily think of changes or substitutions. All should be included within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Industrial Applicability

The extracting device and the medical equipment including the extracting device provided by the embodiments of the present disclosure can realize the beneficial effects of direct viewing of the operation process, reducing operation difficulty, and avoiding various risks brought by radiation to doctors and patients.

Claims

An object retrieval device, characterized in that it comprises a connector (110), a cable member (120), and an object retrieval portion (130); At the distal end, the connector (110) is provided with an accommodating cavity (113) and a distal opening (1131) communicating with the accommodating cavity (113), and the accommodating cavity (113) is used to store the object (130) is accommodated inside, and the pulling cable member (120) is used to drive the fetching part (130) to move relative to the accommodating cavity (113), so that the fetching part (130) can move away from the far The end opening (1131) enters and exits the accommodating cavity (113).
The extracting device according to claim 1, characterized in that a first connection part (116) is provided at the distal end of the connector (110), and the distal opening (1131) is opened in the first connection The first connecting part (116) is used for connecting with a visualization device, and the accommodating cavity (113) is used for communicating with the channel of the visualization device through the distal opening (1131).
The extracting device according to claim 2, wherein the first connecting part (116) is a Luer connector.
The retrieval device according to claim 2, characterized in that, the first connecting part (116) is detachably connected with the connector (110).
The extracting device according to claim 3, wherein the luer connector comprises a first annular member (1161) and a second annular member (1162), and the first annular member (1161) is sleeved on the the second ring member (1162), and a snap groove (1163) for connecting with the visualization device is formed between the first ring member (1161) and the second ring member (1162); the The outer peripheral wall of the first ring member (1161) is provided with anti-slip protrusions (1164).
The extracting device according to claim 5, characterized in that, the extracting device (100) further comprises a sealing member (1165), and the sealing member (1165) is disposed in the engaging groove (1163), and Used to seal the gap between the visualization device and the snap groove (1163).
The extracting device according to claim 1, characterized in that, the extracting device (100) further comprises a heat-shrinkable tube (124), and the heat-shrinkable tube (124) covers the cable member (120) .
The extracting device according to claim 7, wherein the heat shrinkable tube (124) is made of polytetrafluoroethylene.
The retrieval device according to claim 7, characterized in that, the cable member (120) comprises a hard cable part (121) and a soft cable part (122), and the dead cable part (121) has a The distal end is fixedly connected to the proximal end of the soft cable part (122), the distal end of the soft cable part (122) is fixedly connected to the retrieval part (130), and the heat shrinkable tube (124) The hard cable part (121) and the soft cable part (122) are covered.
The object retrieval device according to claim 9, characterized in that, the soft cable part (122) and the object retrieval part (130) are integrally provided.
The extracting device according to claim 1, wherein the extracting part (130) comprises a tip (133) and a plurality of wire parts (131), and the proximal ends of the plurality of wire parts (131) It is fixedly connected with the distal end of the cable member (120), and the distal ends of the plurality of wire portions (131) are bundled with the end head (133).
The extracting device according to claim 11, characterized in that, the extracting part (130) comprises a plurality of basket wires, and each of the basket wires forms one of the wire parts (131), and the plurality of The distal end of the basket wire is welded and fixed to the end head (133).
The extracting device according to claim 11, wherein the extracting part (130) comprises a basket wire, the end (133) has a bending hole, and the basket wire passes through the bending Folding holes to connect with the ends (133) and make each of the basket wires form at least two wire parts (131).
The extracting device according to claim 11, wherein the end head (133) comprises a tube part (134) and a head part (135), and the distal ends of the plurality of wire parts (131) are bundled in the tube part (134); the head part (135) is fixedly connected to the distal end of the tube part (134), and along the direction from the proximal end to the distal end of the end head (133), the head part The radial dimension of (135) gradually decreases.
The picking device according to claim 1, wherein the picking part (130) comprises a flexible membrane (137) and a plurality of supporting parts (136), and the proximal ends of the plurality of supporting parts (136) are are all fixedly connected with the pulling cable member (120), the distal ends of the plurality of supporting parts (136) are all connected with the flexible membrane (137), and the distal ends of the supporting parts (136) are along the The flexible films (137) are arranged in sequence in the circumferential direction.
The extracting device according to claim 15, wherein an opening (138) is formed on two adjacent supporting parts (136), the flexible film (137) covers at least one of the openings (138), and At least one of the openings (138) is in an open state.
The extracting device according to claim 1, characterized in that, the connector (110) is further provided with a liquid injection hole (114) communicating with the accommodating cavity (113), and the liquid injection hole (114) ) is inclined relative to the extending direction of the accommodating cavity (113), and along the direction from the proximal end to the distal end of the connector (110), the liquid injection hole (114) is connected to the accommodating cavity (113). 113), the distance between them decreases.
The extracting device according to any one of claims 1-17, characterized in that, a locking member (150) is provided at the proximal end of the connector (110), and the locking member (150) can be locked The tight state and the unlocked state are switched; the cable member (120) passes through the locking member (150);

When the locking member (150) is in the locking state, the cable member (120) is fixed relative to the connector (110); when the locking member (150) is in the unlocking state , the cable member (120) can move relative to the connector (110).
A medical device, characterized in that, the medical device comprises the extracting device (100) according to any one of claims 1-18.