CN219397454U - Ureteral soft lens and insertion structure thereof - Google Patents

Abstract

A ureteroscope and an insertion structure thereof, the insertion structure comprises a main body part and a suction tube, and the main body part is provided with a suction tube channel. The suction inlet at the front end of the suction tube channel is used as an inlet for sucking crushed stone, and the dismounting port at the rear end of the suction tube channel is used for inserting and taking out the suction tube. The suction tube has a suction passage, the rear end of which is adapted to communicate with a source of negative pressure for sucking crushed stone. Because the suction tube is detachably connected with the main body part, when the suction inlet or a certain position in the suction tube is blocked by broken stones, the suction tube can be directly pulled out of the main body part, and the blocked suction tube can be replaced or cleaned, so that the blocking condition can be eliminated.

Description

Ureteral soft lens and insertion structure thereof

Technical Field

The application relates to medical equipment, in particular to an insertion structure of a ureteral soft lens.

Background

Calculus of urinary system is a common disease, and according to statistics, the prevalence rate of urolithiasis of adult people in China is in an annual rising trend, and seriously threatens the health of people in China. In recent years, with the development of minimally invasive treatment techniques, ureteroscope has become an important treatment means for urinary calculi. However, there is a problem that it is difficult to pulverize the bulk stones to about 2 to 5mm by the conventional holmium laser technique, and the pulverizing efficiency is low. Not only the operation time is prolonged, but also the indication of the ureteroscope is limited.

In order to solve this problem, clinical experts have proposed to suck the crushed stones to the outside of the body in time by using the principle of negative pressure suction. In the structure, a perfusion (flushing) hole and a suction hole are designed at the front end of the endoscope, and the broken stone is flushed by water flow to realize close-range low negative pressure suction, so that the broken stone is discharged out of the body, and the stone cleaning rate is improved.

However, in the ureteroscope using the negative pressure suction principle, the phenomenon of blockage by broken stones is easily caused due to the size of the inner diameter of the suction channel.

Disclosure of Invention

The application provides an insertion structure of a ureteral soft lens and the ureteral soft lens with the insertion structure, so as to show a new structure.

Based on the above object, in one embodiment of the present application, there is provided an insertion structure of a ureteral soft lens, including:

the main body part is provided with a suction pipe channel, the front end of the suction pipe channel is a suction inlet which is used as an inlet for sucking crushed stone, and the rear end of the suction pipe channel is a dismounting port;

and a suction tube having a suction passage, the suction tube being inserted into the suction tube passage from the attaching/detaching port and detachably connected to the main body portion; the front end of the suction channel is communicated with the suction inlet, and the rear end of the suction channel is used for being communicated with a negative pressure source so as to suck the crushed stone.

In one embodiment, the main body part comprises a front end seat, a channel pipe and a main pipe body, wherein the front end seat is provided with at least one first suction pipe channel, the first suction pipe channel is arranged on the front end seat in a penetrating way, and the first suction pipe channel is provided with the suction inlet;

the main pipe body is provided with a first cavity, the channel pipe is inserted into the first cavity of the main pipe body and connected with the front end seat, the channel pipe is provided with a second suction pipe channel, the front end of the second suction pipe channel is communicated with the first suction pipe channel to form the suction pipe channel, and the rear end of the second suction pipe channel is provided with the dismounting opening.

In one embodiment, the front end seat is provided with at least one first pouring channel, the first pouring channel is arranged on the front end seat in a penetrating way, the first pouring channel is provided with a pouring outlet, the inner wall of the main pipe body and the channel pipe enclose a second pouring channel, and the first pouring channel and the second pouring channel are communicated in a sealing way and are used for pouring liquid to the pouring outlet.

In one embodiment, the catheter further comprises a multi-lumen tube connected between the tip holder and the channel tube, the multi-lumen tube having a third aspiration tube channel, a front end of the second aspiration tube channel being in communication with a rear end of the third aspiration tube channel, a front end of the third aspiration tube channel being in communication with the first aspiration tube channel to form the aspiration tube channel.

In one embodiment, the bending control assembly is connected between the main pipe body and the front end seat, and the bending control assembly is used for realizing bending so as to adjust the position of the front end seat.

In one embodiment, the body portion includes an integrally formed core having the suction tube passage extending axially therethrough.

In one embodiment, the suction channel has a first suction port and the suction tube channel has a second suction port, the first suction port being in communication with the second suction port.

In one embodiment, the main body part has a limiting part, the rear end of the suction tube has a matching part, and the limiting part is abutted with the matching part so as to limit the length of the suction tube inserted into the suction tube channel.

In one embodiment, the engaging portion includes a protrusion located at a rear end of the suction tube, the limiting portion includes a wall end surface located at the dismounting opening, and a radial dimension of the protrusion is greater than an inner diameter of the dismounting opening, so that the wall end surface can abut against the protrusion to prevent the suction tube from being inserted continuously.

With the above object in mind, there is provided in one embodiment a ureteroscope comprising an insertion arrangement as claimed in any one of the preceding claims for insertion into a patient ureter.

The insertion structure according to the above embodiment includes a main body portion having a suction tube passage and a suction tube. The suction inlet at the front end of the suction tube channel is used as an inlet for sucking crushed stone, and the dismounting port at the rear end of the suction tube channel is used for inserting and taking out the suction tube. The suction tube has a suction passage, the rear end of which is adapted to communicate with a source of negative pressure for sucking crushed stone. Because the suction tube is detachably connected with the main body part, when the suction inlet or a certain position in the suction tube is blocked by broken stones, the suction tube can be directly pulled out of the main body part, and the blocked suction tube can be replaced or cleaned, so that the blocking condition can be eliminated.

Drawings

Fig. 1 is a schematic view of a part of a ureteral soft lens according to an embodiment of the present application;

FIG. 2 is an enlarged schematic view of a tip portion in one embodiment of the present application;

FIG. 3 is a schematic longitudinal cross-sectional view of a body portion and suction tube in one embodiment of the present application;

FIG. 4 is a schematic illustration of a suction tube in one embodiment of the present application for normal aspiration of crushed stone;

FIG. 5 is a schematic illustration of a suction inlet and internal lumen of a suction tube blocked by crushed stone in one embodiment of the present application;

FIG. 6 is a schematic illustration of a suction tube withdrawn in one embodiment of the present application;

FIG. 7 is a schematic illustration of a new suction tube inserted or a cleaned original suction tube in an embodiment of the present application.

Detailed Description

The utility model will be described in further detail below with reference to the drawings by means of specific embodiments. Wherein like elements in different embodiments are numbered alike in association. In the following embodiments, numerous specific details are set forth in order to provide a better understanding of the present application. However, one skilled in the art will readily recognize that some of the features may be omitted, or replaced by other elements, materials, or methods in different situations. In some instances, some operations associated with the present application have not been shown or described in the specification to avoid obscuring the core portions of the present application, and may not be necessary for a person skilled in the art to describe in detail the relevant operations based on the description herein and the general knowledge of one skilled in the art.

Furthermore, the described features, operations, or characteristics of the description may be combined in any suitable manner in various embodiments. Also, various steps or acts in the method descriptions may be interchanged or modified in a manner apparent to those of ordinary skill in the art. Thus, the various orders in the description and drawings are for clarity of description of only certain embodiments, and are not meant to be required orders unless otherwise indicated.

The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The terms "coupled" and "connected," as used herein, are intended to encompass both direct and indirect coupling (coupling), unless otherwise indicated.

To address the issue of calculus removal in the ureter, some embodiments of the present application provide a ureteral soft-scope, please refer to fig. 1, in which the ureteral soft-scope includes an insertion structure 100 and a scope body 200, the insertion structure 100 being used to insert a patient ureter to aspirate broken calculus within the ureter. The main body 200 mainly plays a control role, and generally the main body 200 includes a negative pressure suction regulator 210 for adjusting the magnitude of the negative pressure suction force of the ureteral soft lens. Of course, the ureteral soft lens requires a negative pressure source to provide a negative pressure suction force and a perfusion source to provide a perfusion function, and in the embodiment shown in fig. 1, the negative pressure source and the perfusion source are disposed in the delivery device 220, and the delivery device 220 may take various existing configurations. Of course, in other embodiments, the negative pressure source and the infusion source may be separately disposed in the lens body 200, or the negative pressure source and the infusion source may be an external negative pressure source and an external infusion source, and the suction tube 120 in the insertion structure 100 is connected to the external negative pressure source and the second infusion channel 133 in the insertion structure 100 is connected to the external infusion source by the lens body 200 or other structures.

The insertion structure 100 is particularly important in terms of its design as a structure to be directly inserted into the interior of a patient. Limited by the restriction of the inner diameter of the patient ureter, the outer diameter of the insertion structure 100 is often not made large, and thus, in a confined space, how to reduce the lithotripsy blockage of the insertion structure 100 is a problem faced by those skilled in the art.

Referring to fig. 1, in the entire insertion structure 100, for convenience of the following description, it may be divided into a distal end portion 101, a bent portion 102, and an insertion portion 103 according to functions. The tip portion 101 is a region where the tip seat 112 is located, the bending portion 102 is a bendable portion of the insertion structure 100, the bending control piece 1161 is located, and the insertion portion 103 is a region behind the bending portion 102.

Referring to fig. 3, in one embodiment of the present application, the insertion structure 100 includes a main body portion 110 and a suction tube 120.

The main body 110 has a suction tube passage 111, a suction inlet 1113 is provided at a front end of the suction tube passage 111, the suction inlet 1113 serves as an inlet for sucking crushed stone, and a detachable port 1114 is provided at a rear end of the suction tube passage 111. The suction tube 120 has a suction passage 121, and the suction tube 120 is inserted into the suction tube passage 111 from the attachment/detachment port 1114 and is detachably attached to the main body portion 110. The front end of the suction channel 121 communicates with the suction inlet 1113, and the rear end of the suction channel 121 is used for communicating with the negative pressure source 221 for sucking the broken stone 300 in the ureter under the negative pressure. The suction tube 120 may be inserted in alignment with the suction inlet 1113, or may be spaced apart from the suction inlet 1113.

In the insertion structure, the suction tube 120 is detachable, and the body part 110 refers to other parts of the insertion structure than the detachable suction tube 120 and the components detachable together with the suction tube 120, and the body part 110 may have different structures according to the insertion structure. For example, in some embodiments, the body portion 110 may include the entire irrigation channel or a portion of the lumen wall forming the irrigation channel (as shown in the embodiment of fig. 3), and if desired, the body portion 110 may include a camera, light source, etc., and may include instrument channels, introducer sheaths, bend control assemblies, outer tubes, etc., as desired. Wherein only the structure of the body portion 110 is shown in fig. 3 for one embodiment.

In the above embodiment, since the suction tube 120 is detachably connected to the main body 110, as shown in fig. 4 to 7, when the suction inlet 1113 of the suction tube 120 or a position inside is blocked by the crushed stone 300, the suction tube 120 can be directly withdrawn from the main body 110, and the blocked suction tube 120 can be replaced with a new one or cleaned.

The detachable connection between the suction tube 120 and the main body 110 may be various structures capable of achieving this function, such as a fastening connection, a detachable adhesion connection, a threaded fixing connection, a screw locking connection, a magnetic suction connection, etc. After the specific connection forms are indicated in this embodiment, it is a conventional means for those skilled in the art to implement these connection forms, so that the description of this embodiment is omitted.

Referring to fig. 2-7, in one embodiment of a body portion 110, the body portion 110 includes a tip seat 112, a channel tube 113, and a main tube 114. The front end seat 112 has at least one first suction tube channel 1111, the first suction tube channel 1111 being provided through the front end seat 112, and the suction inlet 1113 being provided on the first suction tube channel 1111. The front end block 112 is generally positioned at the front end of the entire insertion structure 100 (as shown in fig. 1 and 3, the present application is directed to the front side of the front end block 112 and the rear side opposite thereto). Of course, the front end 112 may also be provided with other components, such as a camera and a light source, for illuminating and obtaining a target image.

The main tubular body 114 has a first cavity. Typically, main tube 114 is a rigid tube structure, and main tube 114 may be used directly as the outer tube of a ureteroscope, although other tube structures may be provided in addition to main tube 114 as desired. In other embodiments, other non-rigid tube materials may be used for the main tube 114.

Referring to fig. 2-7, in some embodiments, channel tube 113 is inserted into the first cavity of main body 114 and coupled to tip seat 112, either by two direct connections or by an indirect connection via other components. For example, in one embodiment, the front end base 112 and the end surface of the channel tube 113 may be glued to be butt-jointed. Of course, in other embodiments, the fixing manner such as welding, clamping, screwing, etc. may be adopted to achieve the fixed butt joint between the front end seat 112 and the channel tube 113.

The channel tube 113 has a second suction tube channel 1112, and the front end of the second suction tube channel 1112 communicates (directly or indirectly communicates) with the first suction tube channel 1111 to form the suction tube channel 111. The detachable port 1114 is provided at the rear end of the second suction tube channel 1112 so as to insert the suction tube 120 into the channel tube 113.

Compared with the structure of the suction channel formed by enclosing the main body of the conventional endoscope and the guiding sheath, in the embodiment shown in fig. 2-7, the suction channel at the middle and rear sections is formed by using the suction tube 120, the space occupied by the tube wall thickness can be maximally reduced, and under the same outer diameter size, the space of the suction channel in the embodiment can be larger, which is more beneficial to suction and discharge of foreign matters (such as crushed stone 300).

Referring to fig. 2-7, a structure for forming the perfusion channel is also shown in this embodiment. Of course, the perfusion channel shown in the present application is not limited to the illustrated embodiment. Specifically, the front end housing 112 has at least one first filling channel 1151 (see fig. 2), and the first filling channel 1151 is disposed through the front end housing 112. The first perfusion channel 1151 has a perfusion outlet 1153 for outflow of liquid to flush the rubble 300 within the ureter. The inner wall of main tube 114 encloses a second perfusion channel 1152 with channel tube 113. The first and second perfusion channels 1151, 1152 are in sealed communication (direct or indirect communication) with one another as perfusion channels for perfusing the perfusion outlet 1153 with liquid. The irrigation channel also has an irrigation inlet (not shown) for irrigation source communication.

In the embodiment shown in fig. 2-7, in the middle-rear section (i.e., the position of the insertion portion 103) of the insertion structure 100, the integrally formed endoscope main body structure is omitted, and the second perfusion channel 1152 is formed by using the gap between the channel tube 113 and the main tube 114.

Specifically, the existing endoscope main body formed integrally is limited by the processing technology, and the wall thickness between the channels cannot be as thin as the common pipe wall, so that the wall thickness between the channels occupies excessive space, and the inner diameter of the channels is reduced. In the present embodiment, the suction channel is formed directly by the suction tube 120 and the tip seat 112, and the second perfusion channel 1152 is formed by the gap between the main tube 114 and the channel tube 113. The channel tube 113 and the main tube 114 are manufactured separately, and the existing mature process can make the wall thickness of the channel tube 113 and the main tube 114 thinner, reduce the wall thickness between the channels as much as possible, and allocate space to the suction channel and the perfusion channel, so that the suction channel and the perfusion channel can be made larger.

When the space between the suction channel and the perfusion channel can be larger, a larger perfusion flow can be formed at the front end seat 112 by using a relatively lower perfusion pressure, and a larger suction flow can be formed in the soft lens under the same negative pressure, so that a better perfusion suction proportion is achieved, controllable and ordered fluid circulation is formed, and the macadam 300 is driven to the suction port in an omnibearing manner to be sucked efficiently.

The overall outer diameter of the insertion structure 100 may be designed to be circular or, in other embodiments, may be designed to be other shapes, such as polygonal. The perfusion channel and the suction channel may be designed as one or more according to the need. The cross-sectional shape of the irrigation channel and the aspiration channel may also be designed as a circle or other shape.

In another embodiment, the body portion 110 further includes a multi-lumen tube (not shown) connected between the tip seat 112 and the channel tube 113. The multi-lumen tube has a third aspiration tube channel, the front end of the second aspiration tube channel 1112 communicates with the rear end of the third aspiration tube channel, and the front end of the third aspiration tube channel communicates with the first aspiration tube channel 1111 to form aspiration tube channel 111.

In another embodiment, the main body 110 may not have the multi-stage structure as shown in the above embodiment, and the main body 110 may include an integrally formed core having an axially penetrating and integrally formed suction tube channel 111. The suction tube 120 is inserted into the integrally formed suction tube channel 111.

Of course, in this embodiment, other channels, such as infusion channels, instrument channels, etc., may be integrally formed with the core. In other embodiments, the irrigation channel, instrument channel, etc. may also be enclosed by the inner core with other components (e.g., an introducer sheath).

Further, regardless of which body portion 110 or other body portion 110 is used, in some embodiments, the body portion 110 further includes a bend control assembly 116, the bend control assembly 116 being coupled between the main body 114 and the tip seat 112, the bend control assembly 116 being configured to effect bending to adjust the position of the tip seat 112.

Referring to fig. 4-7, in one embodiment, a bending control assembly 116 is disposed at the bending portion 102 to achieve bending of the bending portion 102 to adjust the position of the front end seat 112. The bending control assembly 116 may include a bending control member 1161, wherein the bending control member 1161 may employ various bending structures, such as a snake bone tube structure, etc., capable of being applied to an endoscope field or related fields, for the purpose of allowing a user to change a position of the front end socket 112 through the bending control member 1161.

The bending control member 1161 may be fixed to the front end block 112, for example, by welding or adhesive. The bend control assembly 116 further includes a cover 1162 that is positioned over the bend control 1161, such as a snake bone rubber, to seal the bend control 1161 and the like from the environment, forming a sealed barrier.

In one embodiment, the body portion 110 further includes a pull wire (not shown) for pulling the bending control member 1161, which may be a wire rope or other similar pulling structure, for example, when the bending control member 1161 is a snake or the like requiring pulling. One end of the pull wire extends through the second infusion channel 1152 and is coupled to the tip seat 112 to control bending of the bending control element 1161 to change the position of the tip seat 112. In order to provide a sealed control channel for the pull wire, a pull wire tube may be provided separately within the second perfusion channel 1152.

In some embodiments, the pull wire and pull wire tube are two, respectively, and in other embodiments, the pull wire and pull wire tube may be other numbers, so long as traction control of the bending control member 1161 is enabled.

Further, referring to fig. 3-7, in a more specific embodiment, the suction channel 121 has a first suction port 122, and the suction tube channel 111 has a second suction port 1115, and the first suction port 122 communicates with the second suction port 1115 and together with the negative pressure source 221 so as to provide suction power.

Further, to limit the insertion length of the suction tube 120, in some embodiments, the body portion 110 has a limiting portion, and the rear end of the suction tube 120 has a mating portion, and the limiting portion abuts against the mating portion to limit the insertion length of the suction tube 120 into the suction tube channel 111. Various structures capable of realizing limiting, such as abutting, magnetic attraction fixing, screwing, bonding and the like, can be adopted between the matching part and the limiting part.

Referring to fig. 3-7, in one embodiment, the engaging portion includes a protrusion 123 located at a rear end of the suction tube 120, the limiting portion includes a wall end surface located at the mounting/dismounting opening 1114, and a radial dimension of the protrusion 123 is greater than an inner diameter of the mounting/dismounting opening 1114, so that the wall end surface can abut against the protrusion 123 to prevent the suction tube 120 from being inserted continuously. Meanwhile, the protrusion 123 can also be used as a grip for detaching the suction tube 120, so that the suction tube 120 can be detached more conveniently.

The foregoing description of the utility model has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the utility model pertains, based on the idea of the utility model.

Claims (10)

1. An insertion structure of a ureteral soft lens, comprising:

the main body part is provided with a suction pipe channel, the front end of the suction pipe channel is a suction inlet which is used as an inlet for sucking crushed stone, and the rear end of the suction pipe channel is a dismounting port;

and a suction tube having a suction passage, the suction tube being inserted into the suction tube passage from the attaching/detaching port and detachably connected to the main body portion; the front end of the suction channel is communicated with the suction inlet, and the rear end of the suction channel is used for being communicated with a negative pressure source so as to suck the crushed stone.

2. The insertion structure of claim 1, wherein the main body portion includes a tip seat, a channel tube, and a main tube body, the tip seat having at least one first suction tube channel disposed therethrough on the tip seat, the first suction tube channel having the suction inlet;

the main pipe body is provided with a first cavity, the channel pipe is inserted into the first cavity of the main pipe body and connected with the front end seat, the channel pipe is provided with a second suction pipe channel, the front end of the second suction pipe channel is communicated with the first suction pipe channel to form the suction pipe channel, and the rear end of the second suction pipe channel is provided with the dismounting opening.

3. The insert structure of claim 2, wherein the tip seat has at least one first pouring channel disposed therethrough on the tip seat, the first pouring channel having a pouring outlet, the inner wall of the main tube body and the channel tube enclosing a second pouring channel, the first and second pouring channels being in sealed communication as a pouring channel for pouring liquid to the pouring outlet.

4. The insertion structure according to claim 2, further comprising a multi-lumen tube connected between the tip seat and the channel tube, the multi-lumen tube having a third aspiration tube channel, a front end of the second aspiration tube channel being in communication with a rear end of the third aspiration tube channel, a front end of the third aspiration tube channel being in communication with the first aspiration tube channel to form the aspiration tube channel.

5. The insertion structure of claim 2, further comprising a bend control assembly coupled between the main tubular body and the tip seat, the bend control assembly configured to effect bending to adjust a position of the tip seat.

6. The insertion structure of claim 1, wherein said body portion includes an integrally formed core having said suction tube passage extending axially therethrough.

7. The insertion structure according to any one of claims 1 to 6, wherein the suction passage has a first suction port, the suction tube passage has a second suction port, and the first suction port communicates with the second suction port.

8. The insertion structure according to any one of claims 1 to 6, wherein the main body portion has a stopper portion, and the rear end of the suction tube has a fitting portion, the stopper portion abutting against the fitting portion to restrict a length of insertion of the suction tube into the suction tube passage.

9. The insertion structure of claim 8, wherein the mating portion includes a projection at a rear end of the suction tube, and the limiting portion includes a mouth wall end surface at the removal opening, the projection having a radial dimension greater than an inner diameter of the removal opening such that the mouth wall end surface can abut the projection to prevent continued insertion of the suction tube.

10. A ureteroscope comprising an insertion structure as claimed in any of claims 1 to 9 for insertion into a patient ureter.