CN110897679A

CN110897679A - Film-covered fetching net basket, film-covered method and fetching method

Info

Publication number: CN110897679A
Application number: CN201911215012.5A
Authority: CN
Inventors: 扈聪; 段康佳; 陈鹏
Original assignee: AOHUA PHOTOELECTRIC ENDOSCOPE Co Ltd SHANGHAI
Current assignee: AOHUA PHOTOELECTRIC ENDOSCOPE Co Ltd SHANGHAI
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-03-24

Abstract

The invention discloses a film-covering fetching basket, a film-covering method and a fetching method, wherein the scheme is realized based on a handle assembly, an outer sheath tube and an inner core assembly, a connecting part in the handle assembly is connected with the rear end part of the outer sheath tube, and a basket end tube is arranged in the front end part of the outer sheath tube; the inner core assembly is movably arranged in the outer sheath tube, the rear end of the inner core assembly is connected with the driving part in the handle assembly, and a head basket in the inner core assembly is driven by the driving part in the handle assembly to telescopically move in the basket end tube and is switched between two states of extending, opening and retracting; the head net basket is provided with a film coating layer, and the film coating layer can be unfolded or folded along with the opening or closing of the head net basket. The invention provides a scheme of a film-covered fetching basket, which can effectively extract substances which cannot be extracted by the existing basket scheme and provides a brand-new solution for the operation of taking out fine stones or mud-like substances.

Description

Film-covered fetching net basket, film-covered method and fetching method

Technical Field

The invention relates to a medical instrument, in particular to a fetching basket technology in an endoscope diagnosis and treatment technology.

Background

With the popularization and improvement of endoscopic diagnosis and treatment technologies, the application of ERCP (endoscopic retrograde cholangiopancreatography) is increasing. Because ERCP does not need to be operated, the wound is small, the operation time is short, the complication is less than that of the surgical operation, the hospitalization time is also greatly shortened, and the ERCP is an important treatment means for the pancreatic and biliary diseases at present.

In the ERCP biliary calculus extraction operation, the calculus extraction basket is a necessary instrument. The endoscope calculus-taking basket mainly has the advantages that the endoscope forceps channel is used for entering a calculus part, the handle is used for controlling the opening and closing of the head of the basket, the head of the basket catches calculus, and the calculus is taken out.

However, during the operation, many tiny stones or mud-like substances cannot pass through the endoscopic stone extraction basket, resulting in incomplete operation and risk of disease recurrence.

Therefore, the scheme of providing the endoscopic calculus-taking basket capable of extracting the tiny calculus or the muddy substances is an urgent problem to be solved in the field.

Disclosure of Invention

Aiming at the problem that the existing endoscopic calculus extraction basket cannot extract fine calculus or muddy substances, a new endoscopic calculus extraction basket is needed.

Therefore, the invention aims to provide a film-covered fetching basket capable of extracting fine stones or mud-shaped substances, a film-covered fetching basket film-covering method and an endoscopic stone-fetching method based on the film-covered fetching basket.

In order to achieve the purpose, the film-covered fetching basket mainly comprises a handle assembly, an outer sheath tube and an inner core assembly, wherein a connecting part in the handle assembly is connected with the rear end part of the outer sheath tube, and a basket end tube is arranged in the front end part of the outer sheath tube; the inner core assembly is movably arranged in the outer sheath tube, the rear end of the inner core assembly is connected with the driving part in the handle assembly, and a head basket in the inner core assembly is driven by the driving part in the handle assembly to telescopically move in the basket end tube and is switched between two states of extending, opening and retracting; the head net basket is provided with a film coating layer, and the film coating layer can be unfolded or folded along with the opening or closing of the head net basket.

Further, the film coating layer is located at the front end of the head basket.

Further, the handle assembly comprises a handle body and a finger ring, the handle body is connected with the rear end of the outer sheath tube, and the finger ring is movably arranged on the handle body and is in driving connection with the inner core assembly.

Furthermore, the front end of the handle body is provided with a luer connector.

Further, the outer sheath tube is made of a polymer material.

Furthermore, the inner core assembly comprises a traction wire, a traction connecting pipe and a head basket, one end of the traction wire is connected with the driving part in the handle assembly, and the other end of the traction wire is connected with the head basket through the traction connecting pipe.

In order to achieve the purpose, the invention provides a film covering method of a film covering and fetching basket, which comprises the following steps:

distributing the membrane solution between the membrane covering tool and the head basket by a certain thickness through the membrane covering tool;

the film solution was allowed to dry on the head basket to form a film coating layer.

In order to achieve the above object, the present invention provides an endoscopic fetching method comprising:

guiding the film-covered fetching basket to reach a fetching part;

the handle assembly drives the inner core assembly to move in the outer sheath tube, so that the head basket extends out of the outer sheath tube and is expanded, and meanwhile, the covering film on the head basket is released along with the gradual expansion of the head basket;

the large target object is picked up through the opened head net basket, and/or the small target object smaller than the large target object is picked up through the film covering bag.

The invention provides a scheme of a film-covered fetching basket, which can effectively extract substances which cannot be extracted by the existing basket scheme and provides a brand-new solution for the operation of taking out fine stones or mud-like substances.

Meanwhile, the film-coated fetching basket can enrich the treatment means of relevant diseases in practical application, reduces the probability of relapse or complication of patients and has higher clinical value.

Drawings

The invention is further described below in conjunction with the appended drawings and the detailed description.

FIG. 1 is a schematic view of the overall structure of a film-covered fetching basket in an embodiment of the present invention;

FIG. 2 is a schematic view showing a core assembly connecting structure according to an embodiment of the present invention;

FIG. 3 is a schematic view of an assembly structure of a fixture block and a finger ring according to an embodiment of the present invention;

FIG. 4a is a schematic view of a diamond-shaped configuration of a membrane-covered basket head in accordance with an embodiment of the present invention;

FIG. 4b is a schematic view of a spherical membrane-covered basket head according to an embodiment of the present invention;

FIG. 4c is a schematic view of a spiral coated basket head according to an embodiment of the present invention;

FIG. 5 is a schematic view of a film coating process in an example of the present invention.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.

Referring to fig. 1, there is shown an example of the overall structure of the membrane-covered fetching basket given in this example.

As can be seen from the figure, the film-covered fetching basket mainly comprises a handle body 1, a finger ring 2, a luer connector 3, an outer sheath tube 4, a traction wire 5, a basket end tube 6 and a head basket 7 which are matched with each other.

The handle body 1, the finger ring 2 and the luer connector 3 are matched to form a corresponding handle assembly so as to form a bearing main body and a driving part of the film covered fetching basket.

The handle body 1 is used as a basic component for connecting and arranging other components, and the specific configuration can be determined according to actual requirements, and is not limited herein. For example, the handle body 1 is a strip shape as a whole, and a finger ring 2 placement groove is formed along the length direction.

And the ring 2 is used as a driving part in the handle assembly, is arranged in a placing groove on the handle body 1, is in driving connection with the traction wire 5, and can move back and forth along the placing groove so as to drive the traction wire 5 to move back and forth in the sheath tube 4. The specific configuration of the ring 2 may be determined according to actual requirements, and is not limited herein. As an example, the finger ring 2 is provided with two finger ring holes symmetrically on the main body for convenient operation.

The luer connector 3 is arranged at the front end of the handle body 1 and is communicated with the handle body 1. The configuration and arrangement of the luer 3 may be determined according to actual needs, and is not limited herein.

In addition, the outer sheath tube 4 in this example is provided at the tip of the luer 3 and is in communication therewith to perform the operation of inserting as an insertion end of the entire film-covered object-taking net while guiding the movement of the components such as the traction wire and the basket end tube disposed therein.

Meanwhile, a basket end pipe 6 is arranged in the free end part of the outer sheath pipe 4 and is used for being matched with a head basket 7 which moves in a telescopic mode, and when the head basket 7 retracts into the basket end pipe 6, the periphery of the head basket 7 is synchronously extruded, so that the head basket 7 is closed; the head basket 7 is free to expand when the head basket 7 extends out of the basket end tube 6.

In this embodiment, the outer sheath 4 is preferably made of a polymer material, and the specific configuration scheme may be determined according to actual requirements, which is not described herein.

In this embodiment, the structure of the basket end tube 6 corresponds to the structure of the outer sheath tube 4 and the head basket 7, and will not be described herein.

The traction wire 5 and the head basket 7 in the scheme are matched to form a corresponding inner core assembly, are integrally arranged in the sheath tube 4 and are driven by the ring 2 to move back and forth in the sheath tube 4 in a telescopic manner.

Referring to fig. 2 and 3, the whole traction wire 5 is inserted into the sheath tube 4, and a corresponding clamping block 11 is disposed at the rear end of the traction wire, and the clamping block 11 enters the finger ring 2 through the luer connector 3 and is fixed with the finger ring 2 through the finger ring clamping piece 12, so that the traction wire 5 is fixedly connected with the finger ring 2, and the motion transmission is realized.

Furthermore, the front end of the traction wire 5 is connected with the basket end pipe 6 through the traction connecting pipe 10, the head basket 6 and the traction wire 5 are connected through the traction connecting pipe 10, and motion transmission is achieved.

The construction scheme of the traction wire 5 in the scheme can adopt the existing construction scheme of the traction wire with stable reliability, and the detailed description is omitted here. Similarly, the configuration of the traction connection tube 10 may be determined according to actual requirements, and will not be described herein.

The head basket 7 in the scheme is used as a main body part of a main object to be taken, the whole body of the head basket is of a foldable structure and is arranged in the sheath tube 4 and the basket end tube 6 at the front end of the sheath tube, the head basket 7 can move in the basket end tube in a telescopic way relative to the basket end tube 6 under the driving of the traction wire 5, and the head basket 7 can automatically open under the action of self tension when extending out of the basket end tube 6; when retracting the basket end tube 6, it can be retracted closed under compression of the basket end tube 6 so as to be retracted integrally into the basket end tube 6.

Aiming at the problem that the head basket 7 cannot effectively extract fine calculus or muddy substances, the front end of the head basket 7 is provided with the film coating layer 7-1, and the film coating layer 7-1 can be unfolded or folded along with the opening and closing of the head basket. Furthermore, the front end of the head basket 7 is covered by the coating layer 7-1, so that when fine stones or muddy substances which cannot be extracted by the body of the head basket 7 are contained, the front end of the head basket 7-1 can be used for containing the stones or the muddy substances.

The specific configuration of the head basket 7 in this example is not limited to this, and only the above-described function can be achieved. The structural form is also determined according to actual requirements, such as a spherical shape (as shown in fig. 4b), a diamond shape (as shown in fig. 4a), a spiral shape (as shown in fig. 4c), a flower basket shape, and the like.

In addition, the form and manner of the coating layer 7-1 provided at the front end of the head basket 7 may be determined according to actual requirements, and is not limited herein.

By way of example, the following describes the process of forming the coating layer 7-1 on the head basket 7 in this example.

Referring to fig. 5, there is shown an example in which the coating layer 7-1 is molded at the front end of the head basket 7 in this example. In this example, the head basket 7 is coated with a film through a film coating tank 8 and a film coating tool 9, wherein the film coating tank 8 contains a proper amount of film coating liquid, and the film coating tool 9 corresponds to the structure form of the head basket 7 for covering the head basket 7 with the film coating liquid, and the specific structure is not limited herein.

Like this, when head basket 7 carries out the tectorial membrane, with tectorial membrane frock 9 suit on head basket 7, the shape of tectorial membrane frock 9 is different according to the shape of head basket 7 and carries out corresponding supporting design, if this tectorial membrane frock 9 can be special-shaped transparent glass article.

After the assembly of the head basket 7 and the film coating tool 9 is completed, the head basket steel wire and the film coating tool 9 are tightly attached together, the tool is immersed into the film coating groove 8 containing film coating liquid, and at the moment, the film coating liquid is uniformly distributed between the head basket steel wire and the film coating tool 9.

After being immersed for a proper time, the film coating tool 9 is taken out from the film coating groove 8, and the film coating liquid distributed between the head basket steel wires and the film coating tool 9 is dried and solidified.

At this time, the coating on the head basket 7 is completed, and the coating thus formed has good shrinkage and elongation properties. The film coating process on the head basket 7 is completed and the subsequent assembly can be performed by taking out the film coating tool 9 from the head basket 7.

The head basket 7 with the film can then be connected to the towing adapter 10.

According to the tectorial membrane thing basket of getting that above-mentioned scheme constitutes, drive front end head basket 7 that makes a round trip through rear end ring 2 drive operation can be stable carries out flexible removal in basket end pipe to stretch out and open and the switching between the two kinds of states is closed in the withdrawal, realizes getting the thing or withdraws. In this process, the tectorial membrane layer on the head basket 7 struts or folds along with opening or closing of head basket in step, and tiny calculus or muddy material that come the unable extraction of head basket through this tectorial membrane layer pocket is got, can effectively solve the problem that prior art exists.

Therefore, when the film-covered fetching basket is actually applied, the film-covered fetching basket can be used as a surgical instrument and can provide a brand new solution for realizing the fetching operation of tiny stones or muddy substances. The application of the film-covered basket for fetching objects is illustrated below.

In the operation process, the covered object-taking basket is guided to reach the focus of the bile duct through a duodenoscope and a guide wire, and in the process, the head basket 7 is positioned in the sheath tube 4 and is in a contraction closing state.

Then, the ring 2 moves forwards to drive the traction wire 5 and the head basket 7 to move towards the front end of the outer sheath tube 4, so that the head basket 7 extends out of the basket end tube 6 and the outer sheath tube 4 at the front end of the outer sheath tube 4, and the coating film at the front end of the head basket 7 is released along with the expansion of the head basket based on the self elastic tension of the head basket 7.

Then, the open head basket 7 can be used for sleeving and taking out the calculus on the surface of the membrane, and in the sleeving and taking process, if the calculus or the muddy substance is met, the calculus or the muddy substance can be taken out through the membrane covering bag, so that the calculus or the muddy substance can be taken out.

If the focus part needs to be cleaned, medical water can be injected by an injector through the luer connector 3, and the water flows out from the head end of the outer sheath tube 4, so that the focus part is cleaned. The tiny calculi or mud-like substances can be directly drawn into duodenum and discharged out of the body of a patient by the patient, and can also be pushed out of the body of the patient along with the covering film fetching basket.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A covering film fetching basket comprises a handle component, an outer sheath tube and an inner core component, and is characterized in that a connecting part in the handle component is connected with the rear end part of the outer sheath tube, and a basket end tube is arranged in the front end part of the outer sheath tube; the inner core assembly is movably arranged in the outer sheath tube, the rear end of the inner core assembly is connected with the driving part in the handle assembly, and a head basket in the inner core assembly is driven by the driving part in the handle assembly to telescopically move in the basket end tube and is switched between two states of extending, opening and retracting; the head net basket is provided with a film coating layer, and the film coating layer can be unfolded or folded along with the opening or closing of the head net basket.

2. The coated retrieval basket of claim 1, wherein the coating layer is located at a front end of the head basket.

3. The covered object-taking basket according to claim 1, wherein the handle assembly comprises a handle body connected to the rear end of the outer sheath tube and a finger ring movably disposed on the handle body and drivingly connected to the inner core assembly.

4. The film-covered fetching basket according to claim 3, wherein the handle body is provided with a luer joint at the front end.

5. The membrane-covered fetching basket according to claim 1, wherein the outer sheath is made of a polymer material.

6. The membrane-covered fetching basket according to claim 1, wherein the core assembly comprises a traction wire, a traction connection tube and a head basket, one end of the traction wire is connected with the driving part in the handle assembly, and the other end of the traction wire is connected with the head basket through the traction connection tube.

7. A film coating method of a film coating and fetching basket is characterized by comprising the following steps:

8. An endoscopic fetching method, comprising:

guiding the film-covered fetching basket of any one of claims 1-6 to an fetching site;

and (3) sleeving a large target object through the opened head net basket and/or sleeving a small target object smaller than the large target object through the film covering bag.