CN219021128U - Ureteral soft lens and insertion structure thereof - Google Patents

Abstract

A ureteral soft lens and an insertion structure thereof, the insertion structure having an aspiration channel. The suction channel is used for communicating with a negative pressure source to suck broken stone. In order to reduce the blockage of the suction channel by the crushed stone, the suction channel is provided with an inlet section and an expansion section which are communicated with each other, wherein the inlet section is positioned at the front side of the expansion section, and when the crushed stone enters the suction channel from the suction inlet, the inner diameter of the expansion section is larger than that of the inlet section, so that the probability of the blockage of the expansion section by the crushed stone can be reduced.

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

Urinary system stones are common diseases. 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 applying the negative pressure suction principle, the requirement of the overall outer diameter of the insertion structure is limited, and the suction channel cannot be excessively large. When broken stone is accumulated in the suction passage, the suction passage is extremely liable to be blocked.

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.

With the above object in view, there is provided in one embodiment of the present application an insertion structure of a ureteroscope, the insertion structure being elongated and having a suction channel, a front end of the suction channel having a suction inlet serving as an inlet for sucking crushed stone, a rear end of the suction channel having a suction port for communicating with a negative pressure source to suck the crushed stone; the suction channel is provided with an inlet section and an expansion section which are communicated with each other, the inlet section is positioned at the front side of the expansion section, the suction inlet is communicated with the inlet section, the expansion section is communicated with the suction port, and the inner diameter of the expansion section is larger than that of the inlet section.

In one embodiment, a transition section is arranged between the inlet section and the expansion section, the transition section is provided with a smooth or stepped inner wall structure, the narrower end of the transition section is communicated with the inlet section, and the wider end of the transition section is communicated with the expansion section.

In one embodiment, the insertion structure comprises a front end seat, an aspiration tube and a main tube body, wherein the front end seat is provided with at least one first aspiration channel, the first aspiration channel is arranged on the front end seat in a penetrating way, and the first aspiration channel is provided with the aspiration inlet;

the main pipe body is provided with a first cavity and a suction pipe mounting port communicated with the first cavity, the suction pipe is provided with a second suction channel, one end of the suction pipe is inserted into the first cavity from the suction pipe mounting port and is communicated with the first suction channel in a sealing way, and the other end of the suction pipe is provided with the suction port;

the first suction passage and the second suction passage are in sealed communication as a suction passage for sucking foreign matter from the suction inlet.

In one embodiment, the inlet section is located within the first suction channel and the expansion section is located within the second suction channel.

In one embodiment, the second suction channel has an inner diameter that is greater than an inner diameter of the first suction channel.

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 suction 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 multi-lumen tube further comprises a multi-lumen tube connected between the tip seat and the suction tube, the multi-lumen tube having a third suction channel, a front end of the second suction channel being in communication with a rear end of the third suction channel, a front end of the third suction channel being in communication with the first suction channel to form the suction 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 insertion structure includes an integrally formed core having the suction channel extending axially therethrough.

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.

According to the insertion structure of the above embodiment, the insertion structure has the suction passage. The suction channel is used for communicating with a negative pressure source to suck broken stone. In order to reduce the blockage of the suction channel by the crushed stone, the suction channel is provided with an inlet section and an expansion section which are communicated with each other, wherein the inlet section is positioned at the front side of the expansion section, and when the crushed stone enters the suction channel from the suction inlet, the inner diameter of the expansion section is larger than that of the inlet section, so that the probability of the blockage of the expansion section by the crushed stone can be reduced.

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 view (shown by arrows) of the liquid pouring and foreign matter suction and discharge process in a top view according to an embodiment of the present application, wherein the schematic view is shown in a partial section;

FIG. 4 is a schematic illustration of the liquid pouring and foreign object suction and discharge process (shown by arrows) at a side view angle, according to an embodiment of the present application, shown in full section;

fig. 5 is an enlarged view of a portion a in fig. 4.

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, where the suction tube in the insertion structure 100 is connected to the external negative pressure source and the infusion channel 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 120 is located, the bending portion 102 is a bendable portion of the insertion structure 100, the bending control member 151 is located, and the insertion portion 103 is a region behind the bending portion 102.

Referring to fig. 1-4, the insertion structure is elongated and has a suction channel 110. The suction passage 110 has a suction inlet 114 at a front end thereof, the suction inlet 114 serving as an inlet for sucking crushed stone, and a suction port 115 at a rear end thereof, the suction port 115 being for communicating with a negative pressure source, and sucking crushed stone under a negative pressure suction force provided by the negative pressure source.

In order to reduce clogging of the suction passage 110, referring to fig. 5, the suction passage 110 in this embodiment has an inlet section 111 and an expansion section 112 communicating with each other, the inlet section 111 being located on the front side of the expansion section 112. As shown in fig. 1, the present application uses the front side of the front seat 112 as the front and the opposite side as the rear. As shown in fig. 5, the suction inlet 114 communicates with the inlet section 111, the expansion section 112 communicates with the suction port 115, and the inner diameter D2 of the expansion section 112 is larger than the inner diameter D1 of the inlet section 111.

The inlet section 111 itself may serve as a limiting passage, allowing only crushed stone 300 smaller than the inner diameter of the inlet section 111 to enter. When the crushed stone 300 enters the suction passage 110 from the suction inlet 114, the expanded section 112 has an inner diameter larger than that of the inlet section 111, so that a larger passage space for the crushed stone 300 is provided, and the probability of the crushed stone 300 blocking the expanded section 112 can be reduced.

The transition from the inlet section 111 to the expansion section 112 may be accomplished by various shapes and configurations, for example, a smooth transition or a folded-over stepped transition. In one embodiment, a transition section 113 is provided between the inlet section 111 and the expansion section 112, the transition section 113 has a smooth or stepped inner wall structure, the narrower end of the transition section 113 communicates with the inlet section 111, and the wider end of the transition section 113 communicates with the expansion section 112.

As shown in fig. 5, the smooth inner wall structure of the transition section 113 may be conical or the like. The stepped inner wall structure may be a folded angle structure in which the inner wall forms a vertical or other angle.

In one embodiment, the suction channel 110 itself may be an integrally formed structure, for example, the insertion structure includes an integrally formed core having the suction channel 110 axially therethrough and integrally formed. At this point, the inlet section 111, the diverging section 112, and the transition section 113 (if any) are integrally formed in the core.

Of course, in an integrally formed 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).

The suction passage 110 may be formed by combining a plurality of members. For example, referring to fig. 2-5, in one embodiment, the insertion structure 100 includes a tip seat 120, a main body 130, and a suction tube 140.

The front end seat 120 is generally located at the front end of the entire insertion structure 100, and the front end seat 120 has at least one first suction channel 121, where the first suction channel 121 is disposed through the front end seat 120. The first aspiration channel 121 has an aspiration inlet 114 for aspiration of the rubble 300 inside the ureter under negative pressure.

Of course, the front end 120 may also be provided with other components, such as a camera and a light source, for illuminating and obtaining a target image.

The main tube body 130 has a first cavity and a suction tube mounting port 131 communicating with the first cavity. Typically, the main tube 130 is a hard tube structure, and the main tube 130 can be directly used as an outer tube of the ureteroscope, and of course, other tube structures can be further arranged in addition to the main tube 130 as required. In other embodiments, other non-rigid tube materials may be used for the main tube 130.

The suction tube 140 has a second suction passage 141. One end of the suction tube 140 is inserted into the first cavity from the suction tube mounting port 131 of the main tube body 130 and is in sealed communication with the first suction channel 121, and the other end of the suction tube 140 is open to the suction port 115, which suction port 115 is typically located outside the main tube body 130 to facilitate docking of a negative pressure source or the like, such as in communication with the delivery device 220 or the negative pressure source in the mirror main body 200.

Wherein the first suction passage 121 and the second suction passage 141 are hermetically communicated as a suction passage 110, and the suction passage 110 is used for sucking foreign matter (such as crushed stone 300) from the suction inlet 114. The suction process of the suction channel 110 to the crushed stone 300 can be as shown by arrows in fig. 3 and 4.

The suction tube 140 is connected to the tip holder 112, and the connection may be either two types of direct connection or indirect connection via other members. For example, in one embodiment, the front end base 112 and the end surface of the suction tube 140 may be glued to be butt-fixed. Of course, in other embodiments, the fixing manner such as welding, clamping, screwing, etc. may be used to achieve the fixing and docking between the front end seat 112 and the suction tube 140.

Compared with the structure of the suction channel 110 formed by enclosing the main body of the conventional endoscope and the guiding sheath, in the embodiment shown in fig. 2-5, the suction channel 110 at the middle and rear sections is formed by using the suction tube 140, the structure can maximally reduce the space occupied by the tube wall thickness, and under the same outer diameter size, the space of the suction channel 110 in the embodiment can be larger, thereby being more beneficial to suction and discharge of foreign matters (such as crushed stone 300).

Referring to fig. 5, in one embodiment, the suction tube 140 is abutted against the rear end of the front end base 120, and at this time, the inlet section 111 is located in the first suction channel 110, and the expansion section 112 is located in the second suction channel 110. In other embodiments, the suction tube 140 can also be inserted into the first suction channel 110 of the front end 120. In other embodiments, the inlet section 111, the expansion section 112, and the transition section 113 (if any) may also all be disposed on the suction tube 140.

Referring to fig. 5, in one embodiment, the inner diameter of the second suction channel 110 is larger than the inner diameter of the first suction channel 110, so that the space behind the front end base 120 can be fully utilized to make the second suction channel 110 larger.

Referring to fig. 2-5, 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 120 has at least one first filling channel 122 (see fig. 2 and 3), and the first filling channel 122 is disposed through the front end 120. The first perfusion channel 122 has a perfusion outlet 123 for outflow of liquid to flush the rubble 300 inside the ureter. The inner wall of the main tube body 130 encloses a second perfusion channel 132 with the channel tube 113. The first and second perfusion channels 122, 132 are in sealed communication (direct or indirect communication) as perfusion channels for perfusing the perfusion outlet 123 with liquid. The perfusion channel also has a perfusion inlet 133, which perfusion inlet 133 is used for perfusion source communication. The pouring process of the liquid in the pouring channel can be seen as indicated by arrows in fig. 3 and 4.

In the embodiment shown in fig. 2-5, in the middle-rear section (i.e., the position of the insertion portion 103) of the insertion structure 100, the integrally formed main endoscope body structure is omitted, the second perfusion channel 132 is formed by using the gap between the channel tube 113 and the main tube 130, and the space occupied by the wall thickness of the tube can be maximally reduced.

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 110 is formed directly by the suction tube 140 and the tip seat 120, and the second perfusion channel 132 is formed by the gap between the main tube 130 and the suction tube 140. The suction tube 140 and the main tube body 130 are manufactured separately, and the existing mature process can make the wall thickness of the suction tube 140 and the main tube body 130 thinner, reduce the wall thickness between the channels as much as possible, and allocate space to the suction channel 110 and the perfusion channel, so that the suction channel 110 and the perfusion channel can be made larger.

When the space between the suction channel 110 and the perfusion channel can be larger, a larger perfusion flow can be formed at the front end seat 120 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 all directions for high-efficiency suction.

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 and aspiration channels 110 may be designed as one or more as desired. The cross-sectional shape of the irrigation and aspiration channels 110 may also be designed to be circular or other shapes.

In another embodiment, the body portion 110 further includes a multi-lumen tube (not shown) connected between the tip seat 120 and the channel tube 113. The multi-lumen tube has a third suction channel, a front end of the second suction channel 141 communicates with a rear end of the third suction channel, and a front end of the third suction channel communicates with the first suction channel 121 to form the suction tube channel 110.

Wherein, the main tube 130, the multi-cavity tube and the front end seat 120 are fixedly connected, in this embodiment, the multi-cavity tube and the front end seat 120 are fixedly connected, and one end of the main tube 130 is sleeved on the multi-cavity tube and forms a fixation.

In one embodiment, the tip holder 120 may be glued to the end surface of the multi-lumen tube for mating. Of course, in other embodiments, the fixing manner of welding, clamping, screwing, etc. may be used to achieve the fixed butt joint between the tip seat 120 and the multi-lumen tube.

In addition, the multilumen tubing may also be a third infusion path. The third perfusion channel communicates with the first perfusion channel 122 and the second perfusion channel 132 to form a perfusion channel.

Further, in some embodiments, the main insertion structure 100 further includes a bending control assembly 150, wherein the bending control assembly 150 is connected between the main pipe body 130 and the front end seat 120, and the bending control assembly 150 is configured to perform bending to adjust the position of the front end seat 120.

Referring to fig. 2-5, in one embodiment, the bending control assembly 150 is disposed at the bending portion 102 to achieve bending of the bending portion 102 to adjust the position of the front end seat 120. The bending control assembly 150 may include a bending control member 151, wherein the bending control member 151 may employ various bending structures, such as a snake bone tube structure, etc., which can be applied to an endoscope field or related fields, for the purpose of allowing a user to change a position of the front end socket 120 through the bending control member 151.

The bending control member 151 may be fixed to the front end mount 120, for example, welded or adhesively fixed. The bending control assembly 150 further includes a coating 152, the coating 152 being disposed over the bending control member 151, such as a snake bone rubber, to seal the bending control member 151 and the like from the outside, forming a sealed barrier.

In one embodiment, the body portion 110 further includes a traction wire (not shown) for pulling the bending control member 151, such as a wire rope or other similar traction structure when the bending control member 151 is a snake or the like requiring traction. One end of the traction wire penetrates through the second pouring channel 132 and is connected with the front end seat 120 so as to control the bending of the bending control piece 151 and change the position of the front end seat 120. In order to provide a sealed control channel for the pull wire, a pull wire tube may be provided separately within the second irrigation channel 132.

In some embodiments, the traction wire and the traction tube are two, respectively, and in other embodiments, the traction wire and the traction tube may be other numbers as long as traction control of the bending control member 151 can be achieved.

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 ureteroscope, which is characterized in that the insertion structure is in a strip shape and is provided with a suction channel, the front end of the suction channel is provided with a suction inlet which is used as an inlet for sucking broken stone, and the rear end of the suction channel is provided with a suction port which is used for communicating with a negative pressure source so as to suck the broken stone; the suction channel is provided with an inlet section and an expansion section which are communicated with each other, the inlet section is positioned at the front side of the expansion section, the suction inlet is communicated with the inlet section, the expansion section is communicated with the suction port, and the inner diameter of the expansion section is larger than that of the inlet section.

2. The insertion structure of claim 1, wherein there is a transition section between the inlet section and the expansion section, the transition section having a smooth or stepped inner wall structure, the narrower end of the transition section communicating with the inlet section and the wider end of the transition section communicating with the expansion section.

3. The insertion structure according to claim 1 or 2, characterized in that the insertion structure comprises a front end seat, a suction tube and a main tube body, the front end seat having at least one first suction channel, which is provided through the front end seat, the first suction channel having the suction inlet;

the main pipe body is provided with a first cavity and a suction pipe mounting port communicated with the first cavity, the suction pipe is provided with a second suction channel, one end of the suction pipe is inserted into the first cavity from the suction pipe mounting port and is communicated with the first suction channel in a sealing way, and the other end of the suction pipe is provided with the suction port;

the first suction passage and the second suction passage are in sealed communication as a suction passage for sucking foreign matter from the suction inlet.

4. The insertion structure of claim 3, wherein said inlet section is located within said first suction channel and said expansion section is located within said second suction channel.

5. The insertion structure of claim 3, wherein an inner diameter of the second suction channel is greater than an inner diameter of the first suction channel.

6. The insertion structure of claim 3, wherein the tip seat has at least one first pouring channel, the first pouring channel is disposed through the tip seat, the first pouring channel has a pouring outlet, the inner wall of the main tube body and the suction tube enclose a second pouring channel, and the first pouring channel and the second pouring channel are in sealing communication as a pouring channel for pouring liquid to the pouring outlet.

7. The insertion structure according to claim 3, further comprising a multi-lumen tube connected between the tip seat and the suction tube, the multi-lumen tube having a third suction channel, a front end of the second suction channel being in communication with a rear end of the third suction channel, a front end of the third suction channel being in communication with the first suction channel to form the suction channel.

8. The insertion structure of claim 3, 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.

9. The insertion structure according to claim 1 or 2, characterized in that the insertion structure comprises an integrally formed inner core having the suction channel extending therethrough in an axial direction.

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

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