CN219021128U - Flexible ureteroscope and its insertion structure - Google Patents

Abstract

A flexible ureteroscope and its insertion structure, the insertion structure has a suction channel. The suction channel is used to communicate with the negative pressure source to suction gravel. In order to reduce the gravel blocking the interior of the suction channel, the suction channel has an inlet section and an expansion section that communicate with each other, wherein the inlet section is located on the front side of the expansion section. Larger than the inner diameter of the inlet section, thus reducing the chance of debris clogging the expansion section.

Description

Flexible ureteroscope and its insertion structure

technical field

The application relates to medical equipment, in particular to an insertion structure of a flexible ureteroscope.

Background technique

Urinary calculus is a common disease. In recent years, with the development of minimally invasive treatment techniques, flexible ureteroscopy has become an important treatment for urinary stones. However, there is a problem that it is difficult to pulverize large stones with the existing holmium laser technology after crushing them to about 2-5 mm, and the crushing efficiency becomes very low. It not only increases the operation time, but also limits the indications of flexible ureteroscopy.

In order to solve this problem, some clinical experts have proposed to use the principle of negative pressure suction to attract the pulverized stones out of the body in time. In this structure, the front end of the endoscope is designed with a perfusion (flush) hole and a suction hole, and the crushed stones are washed by water to achieve close-range low negative pressure suction, and the stones are discharged from the body to improve the stone-clearing rate.

However, in the flexible ureteroscope using the principle of negative pressure suction, the suction channel cannot be made too large due to the requirement of the overall outer diameter of the insertion structure. When gravel accumulates in the suction channel, it is very easy to cause blockage inside the suction channel.

Contents of the invention

The present application provides an insertion structure of a flexible ureteroscope and a flexible ureteroscope having the insertion structure, so as to demonstrate a new structure.

Based on the above purpose, an embodiment of the present application provides an insertion structure of a flexible ureteroscope. The insertion structure is elongated and has a suction channel. The front end of the suction channel has a suction inlet. As an inlet for suctioning crushed stones, the rear end of the suction channel has a suction port, which is used to communicate with a negative pressure source to suck the crushed stones; the suction channels have inlets that communicate with each other segment and an expansion segment, the inlet segment is located at the front side of the expansion segment, the suction inlet communicates with the inlet segment, the expansion segment communicates with the suction port, and the inner diameter of the expansion segment is larger than the The inside diameter of the inlet section.

In one embodiment, there is a transition section between the inlet section and the expansion section, the transition section has a smooth or stepped inner wall structure, the narrower end of the transition section communicates with the inlet section, the The wider end of the transition section communicates with the expansion section.

In one embodiment, the insertion structure includes a tip base, a suction tube and a main body, the tip base has at least one first suction channel, the first suction channel is provided through the tip base, and the first a suction channel has the suction inlet;

The main body has a first cavity and a suction tube installation port communicated with the first cavity, the suction tube has a second suction channel, and one end of the suction tube is inserted into the suction tube installation port from the suction tube installation port. In the first cavity, and in sealed communication with the first suction channel, the other end opening of the suction tube is the suction port;

The first suction channel and the second suction channel are sealed and communicated as a suction channel for sucking foreign matter from the suction inlet.

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

In one embodiment, the inner diameter of the second suction channel is larger than the inner diameter of the first suction channel.

In one embodiment, the tip base has at least one first perfusion channel, the first perfusion channel is provided through the tip base, the first perfusion channel has a perfusion outlet, and the inner wall of the main body is connected to the The suction tube surrounds a second perfusion channel, and the first perfusion channel and the second perfusion channel are sealed and connected to form a perfusion channel for perfusing liquid to the perfusion outlet.

In one embodiment, it also includes a multi-lumen tube, the multi-lumen tube is connected between the tip seat and the suction tube, the multi-lumen tube has a third suction channel, and the front end of the second suction channel It communicates with the rear end of the third suction channel, and the front end of the third suction channel communicates with the first suction channel to form the suction channel.

In one embodiment, a bending control assembly is further included, the bending control assembly is connected between the main body and the tip seat, and the bending control assembly is used for bending to adjust the position of the tip seat.

In one embodiment, the insertion structure includes an integrally formed inner core, and the inner core has the suction channel penetrating in the axial direction.

Based on the above purpose, an embodiment of the present application provides a flexible ureteroscope, including the insertion structure as described in any one of the above, and the insertion structure is used for inserting the patient's ureter.

According to the insertion structure of the above-mentioned embodiment, the insertion structure has a suction channel. The suction channel is used to communicate with the negative pressure source to suction gravel. In order to reduce the gravel blocking the interior of the suction channel, the suction channel has an inlet section and an expansion section that communicate with each other, wherein the inlet section is located on the front side of the expansion section. When the gravel enters the suction channel from the suction inlet, due to the inner diameter Larger than the inner diameter of the inlet section, thus reducing the chance of debris clogging the expansion section.

Description of drawings

Fig. 1 is a partial structural schematic diagram of a flexible ureteroscope in an embodiment of the present application;

Figure 2 is an enlarged schematic view of the apex in an embodiment of the present application;

Fig. 3 is a schematic diagram of the process of liquid perfusion and suction and discharge of foreign matter (as shown by the arrow) under a top view angle in an embodiment of the present application, which is shown in a partially sectioned manner in the figure;

Figure 4 is a schematic diagram of the process of liquid perfusion and suction and discharge of foreign matter (as shown by the arrow) under a side view angle in an embodiment of the present application, which is shown in a full section in the figure;

FIG. 5 is an enlarged view of part A in FIG. 4 .

Detailed ways

The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. Wherein, similar elements in different implementations adopt associated similar element numbers. In the following implementation manners, many details are described for better understanding of the present application. However, those skilled in the art can readily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the application are not shown or described in the description, this is to avoid the core part of the application being overwhelmed by too many descriptions, and for those skilled in the art, it is necessary to describe these operations in detail Relevant operations are not necessary, and they can fully understand the relevant operations according to the description in the specification and general technical knowledge in the field.

In addition, the characteristics, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. At the same time, the steps or actions in the method description can also be exchanged or adjusted in a manner obvious to those skilled in the art. Therefore, the various sequences in the specification and drawings are only for clearly describing a certain embodiment, and do not mean a necessary sequence, unless otherwise stated that a certain sequence must be followed.

The serial numbers assigned to components in this document, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "connection" mentioned in this application all include direct and indirect connection (connection) unless otherwise specified.

In order to solve the problem of stone discharge in the ureter, some embodiments of the present application provide a flexible ureteroscope, please refer to FIG. 1. In this embodiment, the flexible ureteroscope includes an insertion structure 100 and a mirror main body 200. 100 is used for inserting the patient's ureter to aspirate broken stones in the ureter. The scope main body 200 mainly plays a control role, and usually the scope main body 200 includes a negative pressure suction regulator 210 for adjusting the negative pressure suction force of the flexible ureteroscope. Of course, the flexible ureteroscope needs a negative pressure source that provides negative pressure suction and a perfusion source that provides perfusion function. In the embodiment shown in FIG. The device 220 can adopt various existing structures. Certainly, in other embodiments, the negative pressure source and the perfusion source can also be arranged separately in the mirror body 200, or the negative pressure source and the perfusion source can also be an external negative pressure source and an external perfusion source. 200 or other structures connect the suction tube in the insertion structure 100 with the external negative pressure source, and connect the perfusion channel in the insertion structure 100 with the external perfusion source.

As the insertion structure 100 directly intervenes inside the patient, the rationality of its design is particularly important. Due to the limitation of the inner diameter of the patient's ureter, the outer diameter of the insertion structure 100 cannot be made very large. Therefore, in a limited space, how to reduce the debris blockage of the insertion structure 100 is a difficult problem faced by those skilled in the art.

Please refer to FIG. 1 , in the entire insertion structure 100 , for the convenience of subsequent description, it can be divided into a tip portion 101 , a curved portion 102 and an insertion portion 103 according to different functions. The tip portion 101 is the area where the tip seat 120 is located, the bending portion 102 is the bendable part of the insertion structure 100 , roughly the area where the bending control member 151 is located, and the insertion portion 103 is the area behind the bending portion 102 .

Please refer to FIGS. 1-4 , the insertion structure is long and has a suction channel 110 . The front end of the suction channel 110 has a suction inlet 114, the suction inlet 114 is used as an inlet for suctioning crushed stones, and the rear end of the suction channel 110 has a suction port 115, and the suction port 115 is used to communicate with a negative pressure source. The gravel is sucked under the negative pressure suction force provided by the source.

In order to reduce the blockage of the suction channel 110 , please refer to FIG. 5 . In this embodiment, the suction channel 110 has an inlet section 111 and an expansion section 112 that communicate with each other. The inlet section 111 is located at the front side of the expansion section 112 . As shown in FIG. 1 , in this application, the side where the tip seat 112 is located is referred to as the front, and the opposite side is referred to as the rear. As shown in FIG. 5 , the suction inlet 114 communicates with the inlet section 111 , and the expansion section 112 communicates with the suction opening 115 . The inner diameter D2 of the expansion section 112 is larger than the inner diameter D1 of the inlet section 111 .

Wherein, the entrance section 111 itself can be used as a limiting channel, allowing only gravel 300 smaller than the inner diameter of the entrance section 111 to enter. When the gravel 300 enters the suction channel 110 from the suction inlet 114, because the inner diameter of the expansion section 112 is larger than the inner diameter of the inlet section 111, a larger passage space for the gravel 300 is provided, so the probability of the gravel 300 blocking the expansion section 112 can be reduced. .

The transition from the inlet section 111 to the expansion section 112 can be realized through various shapes and structures, for example, it can be a smooth transition, or a folded stepped transition. In one embodiment, there is a transition section 113 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 transition section 113 is relatively The wide end 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 similar. The stepped inner wall structure may be a knuckle structure where 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 inner core, and the inner core has the axially penetrating and integrally formed suction channel 110 . At this point, the inlet section 111 , expansion section 112 and transition section 113 (if any) are integrally formed in the inner core.

Of course, in the embodiment of one-piece molding, other channels, such as perfusion channels, instrument channels, etc., can also be integrally formed on the inner core. In some other embodiments, the perfusion channel, instrument channel, etc. may also be surrounded by an inner core and other components (such as an introducer sheath).

In addition, the suction channel 110 can also be formed by combining multiple components. For example, please refer to FIGS. 2-5 , an embodiment, the insertion structure 100 includes a tip seat 120 , a main body 130 , and a suction tube 140 .

The tip seat 120 is generally located at the front end of the entire insertion structure 100 , and the tip seat 120 has at least one first suction channel 121 , and the first suction channel 121 is provided through the tip seat 120 . The first suction channel 121 has a suction inlet 114 for suctioning the gravel 300 in the ureter under negative pressure.

Certainly, other components, such as a camera and a light source, may also be provided on the tip base 120 for illuminating and obtaining target images.

The main body 130 has a first cavity and a suction tube installation port 131 communicating with the first cavity. Usually, the main body 130 is a hard tube structure, and the main body 130 can be directly used as the outer tube of the flexible ureteroscope. Of course, other pipeline structures can be arranged in addition to the main body 130 as required. In other embodiments, the main body 130 can also use other non-rigid tube materials.

The suction tube 140 has a second suction channel 141 . One end of the suction tube 140 is inserted into the first cavity from the suction tube installation port 131 of the main body 130, and is in sealing communication with the first suction channel 121, and the other end of the suction tube 140 is opened as a suction port 115, and the suction port 115 It is usually located outside the main body 130 to facilitate docking with a negative pressure source, such as communicating with the delivery device 220 in the mirror main body 200 or the negative pressure source.

Wherein, the first suction channel 121 and the second suction channel 141 are sealed and connected to form the suction channel 110 , and the suction channel 110 is used to suck foreign matter (such as gravel 300 ) from the suction inlet 114 . The suction process of the suction channel 110 for the gravel 300 can be shown by the arrows in FIGS. 3 and 4 .

The suction tube 140 is connected to the tip base 112, and this connection can be two kinds of direct connection, or indirect connection through other components. For example, in one embodiment, glue can be applied between the tip end seat 112 and the end surface of the suction tube 140 for docking and fixing. Of course, in other embodiments, the connection between the tip base 112 and the suction tube 140 can also be fixed by means of welding, clamping, screwing or the like.

Compared with the existing structure in which the main body of the endoscope and the guide sheath enclose the suction channel 110, in the embodiment shown in Fig. The space occupied by the thickness of the pipe wall is minimized. Under the same outer diameter, the space of the suction channel 110 in this embodiment can be larger, which is more conducive to the suction and discharge of foreign matter (such as gravel 300 ).

Please refer to FIG. 5 , in one embodiment, the suction tube 140 is docked at the rear end of the tip base 120 , 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 tip base 120 . In other embodiments, the inlet section 111 , the expansion section 112 and the transition section 113 (if any) can all be arranged on the suction tube 140 .

Please refer to FIG. 5 , in one embodiment, the inner diameter of the second suction channel 110 is larger than that of the first suction channel 110 , so that the space behind the tip seat 120 can be fully utilized to make the second suction channel 110 larger.

Please refer to FIGS. 2-5 , this embodiment also shows a structure for forming a perfusion channel. Of course, the perfusion channels shown in this application are not limited to the illustrated embodiments. Specifically, the tip base 120 has at least one first perfusion channel 122 (see FIGS. 2 and 3 ), and the first perfusion channel 122 is provided through the tip base 120 . The first irrigation channel 122 has an irrigation outlet 123 for liquid to flow out to flush out the debris 300 in the ureter. The inner wall of the main body 130 and the channel pipe 113 form a second perfusion channel 132 . The first perfusion channel 122 and the second perfusion channel 132 are in sealing communication (directly or indirectly) as a perfusion channel for perfusing liquid into the perfusion outlet 123 . The perfusion channel also has a perfusion inlet 133 for perfusion source communication. The perfusion process of the liquid in the perfusion channel can be shown by the arrows in FIGS. 3 and 4 .

In the embodiment shown in FIGS. 2-5 , in the middle and rear section of the insertion structure 100 (ie, the position of the insertion part 103 ), the integrally formed endoscope body structure is omitted, and the gap between the channel tube 113 and the main body 130 is used to form a The second perfusion channel 132, this structure can minimize the space occupied by the thickness of the tube wall. Compared with the existing perfusion channel integrally formed on the main body of the endoscope, under the same outer diameter, the perfusion channel of this embodiment The space can be larger, more conducive to liquid perfusion.

Specifically, the existing one-piece endoscope body needs to form multiple channels. Due to the limitations of the processing technology, the wall thickness between the channels cannot be as thin as the ordinary tube wall. Therefore, the wall thickness between the channels Occupies too much space, which in turn leads to a reduction in the inner diameter of the channel. In this embodiment, however, 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 body 130 and the suction tube 140 . The suction tube 140 and the main body 130 are manufactured separately, and the existing mature technology can make the wall thickness of the suction tube 140 and the main body 130 thinner, which can reduce the wall thickness between each channel as much as possible, and allocate the space to the suction channels 110 and the perfusion channel, so 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 relatively low perfusion pressure can be used to form a large perfusion flow in the tip seat 120, and a large suction flow can be formed in the flexible mirror under the same negative pressure. Achieve a better perfusion suction ratio, and form a controllable and orderly fluid circulation, and drive the gravel 300 to the suction port in an all-round way for efficient suction.

The overall outer diameter of the insertion structure 100 can be designed as a circle, or in other embodiments can also be designed as another shape, such as a polygon. The perfusion channel and suction channel 110 can be designed as one or more as required. The cross-sectional shape of the perfusion channel and the suction channel 110 can also be designed as a circle or other shapes.

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

Wherein, the main body 130, the multi-lumen tube and the tip base 120 are fixedly connected. In this embodiment, the multi-lumen tube and the tip base 120 are fixedly connected, and one end of the main body 130 is sleeved on the multi-lumen tube to form a fixed .

In one embodiment, glue can be applied between the tip base 120 and the end surface of the multi-lumen tube for butt-fixing. Certainly, in other embodiments, the fixed connection between the tip base 120 and the multi-lumen tube may also be achieved by welding, clamping, screwing and other fixing methods.

In addition, the multi-lumen tube can provide a third perfusion channel. 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, the bending control assembly 150 is connected between the main body 130 and the tip seat 120, and the bending control component 150 is used to realize bending to adjust the tip seat 120 position.

Referring to FIGS. 2-5 , in one embodiment, the bending control assembly 150 is disposed at the bending portion 102 to realize the bending of the bending portion 102 to adjust the position of the tip seat 120 . The bending control assembly 150 can include a bending control member 151, wherein the bending control member 151 can adopt various bending structures that can be applied in the field of endoscopes or related fields, such as a serpentine tube structure, etc., the purpose of which is that the user The position of the tip seat 120 can be changed through the bending control member 151 .

The bending control member 151 can be fixed with the tip base 120 , such as welding or bonding. The bending control assembly 150 further includes a cladding layer 152 , which is sheathed outside the bending control member 151 , such as a snake-bone rubber, thereby sealing the bending control member 151 and the like from the outside to form a sealing barrier.

In one embodiment, the main body portion 110 further includes a pulling wire (not shown in the figure) for pulling the bending control member 151, for example, when the bending controlling member 151 is a structure that requires pulling, such as a serpentine tube, the pulling wire It can be a wire rope or other similar traction structure. One end of the pulling wire runs through the second perfusion channel 132 and connects with the tip seat 120 to control the bending of the bending control member 151 and change the position of the tip seat 120 . In order to provide a sealed control channel for the pulling wire, a pulling wire tube can be separately arranged in the second perfusion channel 132 .

In some embodiments, there are two pulling wires and pulling wire tubes, and in other embodiments, there may be other numbers of pulling wires and pulling wire tubes, as long as the pulling control of the bending control member 151 can be realized.

The above uses specific examples to illustrate the present invention, which is only used to help understand the present invention, and is not intended to limit the present invention. For those skilled in the technical field to which the present invention belongs, some simple deduction, deformation or replacement can also be made according to the idea of the present invention.

Claims (10)

1. An insertion structure of a flexible ureteroscope, characterized in that the insertion structure is elongated and has a suction channel, and the front end of the suction channel has a suction inlet, and the suction inlet is used as a suction port for rubble Inlet, the rear end of the suction channel has a suction port, and the suction port is used to communicate with a negative pressure source to suck the crushed stones; the suction channel has an inlet section and an expansion section that communicate with each other, so The inlet section is located on the front side of the expansion section, the suction inlet communicates with the inlet section, the expansion section communicates with the suction port, and the inner diameter of the expansion section is larger than that of the inlet section. 2. The insertion structure according to claim 1, wherein there is a transition section between the inlet section and the expansion section, the transition section has a smooth or stepped inner wall structure, and the transition section is narrower. One end communicates with the inlet section, and the wider end of the transition section communicates with the expansion section. 3. The insertion structure according to claim 1 or 2, characterized in that, the insertion structure comprises a tip seat, a suction tube and a main body, the tip seat has at least one first suction channel, and the first suction channel The first suction channel has the suction inlet; The main body has a first cavity and a suction tube installation port communicated with the first cavity, the suction tube has a second suction channel, and one end of the suction tube is inserted into the suction tube installation port from the suction tube installation port. In the first cavity, and in sealed communication with the first suction channel, the other end opening of the suction tube is the suction port; The first suction channel and the second suction channel are sealed and communicated as a suction channel for sucking foreign matter from the suction inlet. 4. The insertion structure of claim 3, wherein the inlet section is located in the first suction channel and the expansion section is located in the second suction channel. 5. The insertion structure according to claim 3, wherein the inner diameter of the second suction channel is larger than the inner diameter of the first suction channel. 6. The insertion structure according to claim 3, wherein the tip seat has at least one first perfusion channel, the first perfusion channel is provided through the tip seat, and the first perfusion channel has The perfusion outlet, the inner wall of the main body and the suction tube enclose a second perfusion channel, and the first perfusion channel and the second perfusion channel are sealed and communicated as perfusion channels for perfusing liquid to the perfusion 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 tube. The front end of the second suction channel communicates with the rear end of the third suction channel, and the front end of the third suction channel communicates with the first suction channel to form the suction channel. 8. The insertion structure according to claim 3, further comprising a bending control assembly, the bending control assembly is connected between the main body and the tip seat, and the bending control assembly is used to realize bending , to adjust the 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, the inner core having the suction channel penetrating in the axial direction. 10. A flexible ureteroscope, characterized in that it comprises the insertion structure according to any one of claims 1-9, and the insertion structure is used for inserting the patient's ureter.

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