Dilation tube and ureter sheath

Abstract

The utility model relates to the technical field of surgical medical instruments, in particular to an expansion tube and a ureter sheath, which comprise a tube body, a first channel, a second channel and a third channel are axially arranged in the tube body, the first channel is used for a guide wire to pass through, the second channel is used for fluid to pass through, and the third channel is used for an optical fiber assembly to pass through. A notch is formed in the peripheral wall of the far end of the tube body, the notch penetrates to the end face of the far end of the tube body in the axial direction of the tube body, the notch penetrates to be communicated with the first channel in the radial direction of the tube body, and the notch corresponds to the first channel. The notch corresponding to the first channel is formed in the peripheral wall of the tube body, so that the exposed area of the far-end port of the first channel is increased, the insertion difficulty of a guide wire into the guide wire channel is reduced, an operator can quickly and accurately find the first channel used for insertion of the guide wire from the multiple channels on the expansion tube, and the operation efficiency is improved. The accuracy and convenience of inserting the guide wire into the first channel are improved, and the use convenience of the expansion tube and the ureter sheath is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of surgical medical instruments, in particular to a dilating tube and a ureteral sheath. Background Art

[0002] Ureteral sheaths are used in urological surgery. Before clinical urological surgery, a ureteral sheath must be inserted into the ureter to establish a surgical channel. During the operation, an endoscope, laser fiber, stone removal instrument or operating cable are introduced through the surgical channel, and some blood clots, small stones, and purulent floccules are also discharged from the ureteral sheath. In the process of realizing the present invention, the applicant found that it is difficult to accurately insert a guide wire into the dilation tube for the existing ureteral sheath, especially a ureteral sheath with a multi-lumen dilation tube. Utility Model Content

[0003] The purpose of this application is to provide a dilatation tube and a ureteral sheath to solve the above technical problems existing in the prior art, mainly including the following two aspects:

[0004] In a first aspect, the present application provides an expansion tube, including a tube body, wherein a first channel, a second channel and a third channel are axially arranged in the tube body, the first channel is used for passing a guide wire, the second channel is used for passing a fluid, and the third channel is used for passing an optical fiber assembly, and a notch is arranged on the distal peripheral wall of the tube body, the notch penetrates the tube body axially to the distal end face of the tube body, and the notch penetrates the tube body radially to communicate with the first channel, and the notch is arranged corresponding to the first channel.

[0005] Furthermore, the notch is a wedge-shaped structure.

[0006] Furthermore, the maximum width of the notch is smaller than the diameter of the first channel.

[0007] Furthermore, the notch is close to the second channel or the third channel.

[0008] Furthermore, the tube body includes a gradient section at the distal end, and the gradient section gradually decreases from the proximal end to the distal end.

[0009] Furthermore, a reflow groove is axially arranged on the peripheral wall of the tube body.

[0010] Furthermore, the first channel, the second channel and the third channel are arranged around the axis of the tube body, and the reflux groove is located between any two of the first channel, the second channel and the third channel.

[0011] Furthermore, the distal end of the reflux groove extends to the gradient section;

[0012] And / or, three reflux grooves are arranged on the tube body.

[0013] The second aspect of the present application provides a ureteral sheath, including a sheath seat, an outer sheath tube and the above-mentioned dilation tube, wherein the proximal end of the outer sheath tube is connected to the sheath seat, the proximal end of the dilation tube is connected to the sheath seat, and the distal end of the dilation tube passes through the outer sheath tube.

[0014] Furthermore, a reflux port is provided on the sheath seat, and the reflux port is communicated with a reflux groove on the peripheral wall of the tube body, and the proximal end of the reflux groove is used for bonding with the sheath seat.

[0015] Compared with the prior art, this application has at least the following technical effects:

[0016] The present application provides a notch corresponding to the first channel on the peripheral wall of the tube body, thereby increasing the exposed area of ​​the distal port of the first channel and reducing the difficulty of inserting the guide wire into the guide wire channel, allowing the operator to quickly and accurately find the first channel for inserting the guide wire from multiple channels on the dilator tube, thereby improving the accuracy and convenience of inserting the guide wire into the first channel, and effectively improving the convenience of using the dilator tube and the ureteral sheath. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of the ureteral sheath tube of the utility model;

[0019] Figure 2 This is a schematic diagram of the connection structure of the outer sheath tube and the dilation tube of the utility model;

[0020] Figure 3 yes Figure 2 Exploded diagram of

[0021] Figure 4 yes Figure 2 Side view of

[0022] Figure 5 It is a structural schematic diagram of the expansion tube of the utility model;

[0023] Figure 6 yes Figure 5 A partial enlarged view of the middle A;

[0024] Figure 7 It is a schematic diagram of the internal structure of the sheath seat of the utility model;

[0025] In the figure,

[0026] 10. Tube body; 110. First channel; 120. Second channel; 130. Third channel; 140. Notch; 150. Gradient section; 160. Reflux groove; 20. Outer sheath tube; 30. Sheath seat; 310. Reflux port. DETAILED DESCRIPTION

[0027] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being above, above, and above a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below a second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] In addition, in the present invention, "proximal end" and "distal end" refer to the far and near positions of the structure relative to human operation in the use environment, so as to facilitate the description of the positional relationship between components and facilitate understanding; for the same component, "proximal end" and "distal end" are the relative positional relationship of the component, not absolute; therefore, it should be understood from the perspective of realizing the principles of the present invention, and should not deviate from the essence of the present invention.

[0032] Ureteral sheaths are used in urological surgery. Before clinical urological surgery, a ureteral sheath must be inserted into the ureter to establish a surgical channel. During the operation, an endoscope, laser optical fiber, stone removal instrument or operating cable are introduced through the surgical channel, and some blood clots, small stones, and purulent floccules are also discharged from the ureteral sheath. For existing ureteral sheaths, such as a multi-cavity visual dilation tube and dilation kit disclosed in Chinese Patent Publication No. CN217566211U, the dilation tube is provided with a guide wire channel, a liquid channel and an optical fiber channel. Since the dilation tube itself is small in size (micrometer level), the port size of the guide wire channel, the liquid channel and the optical fiber channel on the dilation tube at the distal end is correspondingly smaller, which makes it difficult for the operator to insert the guide wire into the guide wire channel. At the same time, since the diameters of the guide wire channel, the liquid channel and the optical fiber channel are similar, it is difficult for the operator to accurately distinguish the guide wire channel, which further increases the difficulty of accurately inserting the guide wire into the guide wire channel. In order to solve the problem of difficulty in accurately inserting a guide wire into a dilation tube, the present application provides a dilation tube and a ureteral sheath that improve the accuracy and convenience of guide wire insertion, and the specific structure is shown in the following embodiments.

[0033] Embodiment 1:

[0034] The present application embodiment provides a dilation tube, such as Figure 2 to Figure 6 As shown, it includes a tube body 10, in which a first channel 110, a second channel 120 and a third channel 130 are axially arranged, the first channel 110 is used to pass a guide wire, the second channel 120 is used to pass a fluid, and the third channel 130 is used to pass an optical fiber component, and a notch 140 is arranged on the distal peripheral wall of the tube body 10, the notch 140 penetrates the tube body 10 axially to the distal end face of the tube body 10, and the notch penetrates the tube body 10 radially to communicate with the first channel 110, and the notch 140 is arranged corresponding to the first channel 110.

[0035] When in use, when it is necessary to use a guide wire to insert the ureteral sheath into the human body cavity, the guide wire can be first inserted into the first channel 110 from the distal end of the tube body 10. Specifically, since a notch 140 corresponding to the first channel 110 is provided on the peripheral wall of the tube body 10, the operator can determine the first channel 110 for passing the guide wire from the first channel 110, the second channel 120 and the third channel 130 through the notch 140. At the same time, based on the notch 140 penetrating the ureteral sheath 10 axially to the distal end face of the tube body 10, the notch 140 is inserted into the first channel 110. The structural design of 40 radially penetrating the tube body 10 to communicate with the first channel 110 increases the exposed area of ​​the distal end port of the first channel 110. Correspondingly, the insertion area of ​​the port for inserting the guidewire into the first channel 110 is increased accordingly, thereby reducing the difficulty of inserting the guidewire into the first channel 110, allowing the operator to quickly and accurately find the first channel 110 for inserting the guidewire from multiple channels on the dilator, thereby improving the accuracy and convenience of inserting the guidewire into the first channel 110, and effectively improving the convenience of using the dilator and the ureteral sheath.

[0036] In order to improve the smoothness of the dilation tube being placed into the human body along the guide wire, Figure 6 As shown, the notch 140 can be set to a wedge-shaped structure. During the insertion of the guide wire, when the bending angle of the guide wire is large, the inner wall of the notch 140 is used to provide support for the guide wire, thereby increasing the upper limit of the adaptability of the expansion tube to the bending angle of the guide wire, facilitating the adaptive bending deformation of the expansion tube along the guide wire, thereby improving the passing performance of the expansion tube along the guide wire into the human body.

[0037] In order to facilitate the orderly guiding of the dilation tube by the guide wire when the dilation tube is placed along the guide wire, the maximum width of the notch 140 can be set to be smaller than the diameter of the first channel 110. Figure 4 and Figure 6 As shown, the distal end face of the first channel 110 is formed into a semi-closed ring to limit the guide wire, and the main contact position between the guide wire and the first channel 110 is located on the distal end face of the first channel 110. When it is necessary to increase the turning adaptation angle of the expansion tube, the main contact position between the guide wire and the first channel 110 is located at the notch 140 to ensure the structural safety of the first channel 110 and the distal end of the tube body 10.

[0038] In order to improve the structural strength of the far end of the tube body 10, the notch 140 can be arranged close to the second channel 120; the axis of the first channel 110 is directly opposite the radial circumferential wall of the tube body 10, which is the weakest. By arranging the notch 140 close to the second channel 120, the notch 140 avoids the weakest part of the circumferential wall of the tube body 10 corresponding to the first channel 110, thereby ensuring the structural strength and structural safety of the far end of the first channel 110 and the tube body 10, reducing the risk of damage to the first channel 110 and the tube body 10, and improving the safety of equipment use.

[0039] In addition, in the process of controlling the expansion tube to be inserted into the human body along the guide wire, the optical fiber component can be inserted into the third channel 130, and the distal end of the optical fiber component is located at the distal end of the third channel 130. The optical component collects image information of the distal end of the expansion tube to achieve visualized insertion. Furthermore, a cleaning fluid can be introduced into the second channel 120, and the cleaning fluid is sprayed from the distal end of the second channel 120 to flush the distal end of the expansion tube, thereby ensuring that the optical fiber component collects clear image information of the environment at the distal end of the expansion tube and reducing the insertion resistance of the expansion tube. Based on this, the notch 140 is set close to the second channel 120 so that the sprayed cleaning fluid is close to the guide wire, and the expansion tube along the forward path of the guide wire can be flushed more accurately, thereby further improving the flushing effect and improving the insertion passability of the expansion tube.

[0040] It should be noted that the optical fiber assembly is a prior art, and specifically may be an insertion part of an endoscope; the endoscope in the embodiment of the present application may be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc., and the embodiment of the present application does not impose any specific restrictions on the type of endoscope.

[0041] In some embodiments, in order to improve the structural strength of the distal end of the tube body 10, as Figure 4 and Figure 6 As shown, the notch 140 can be arranged close to the third channel 130 so that the notch 140 avoids the weakest part of the peripheral wall of the tube body 10 corresponding to the first channel 110, thereby ensuring the structural strength and structural safety of the first channel 110 and the far end of the tube body 10, reducing the risk of damage to the first channel 110 and the tube body 10, and improving the safety of equipment use.

[0042] In order to improve the smoothness of the dilation tube being placed into the human body along the guide wire, Figure 2 to Figure 5 As shown, the tube body 10 may include a gradient section 150 at the distal end, wherein the gradient section 150 gradually decreases from the proximal end to the distal end, and the gradient section 150 gradually expands the inner wall of the body cavity, thereby improving the insertion passability of the expansion tube and the comfort of the human body.

[0043] To prevent the flushing solution from being retained in the body cavity and affecting the safety of the body cavity tissue, Figure 2 to Figure 5 As shown, a reflux groove 160 can be axially arranged on the peripheral wall of the tube body 10. During use, the reflux groove 160 and the inner wall of the outer sheath tube 20 cooperate to form a reflux channel, and the proximal end of the reflux channel is connected to the negative pressure source. The negative pressure source generates negative pressure, and a pressure difference is formed between the proximal end and the distal end of the reflux groove 160. Under the action of the pressure difference, the flushing fluid at the distal end of the expansion tube is driven to be sucked into the reflux groove 160 and discharged through the reflux groove 160, thereby avoiding the flushing fluid from being retained in the body cavity and ensuring the safety of the body cavity tissue.

[0044] In order to improve the space utilization rate inside the expansion tube, the first channel 110, the second channel 120 and the third channel 130 can be arranged around the axis of the tube body 10, so as to increase the space available for the first channel 110, the second channel 120 and the third channel 130, and realize the maximum design of the diameters of the first channel 110, the second channel 120 and the third channel 130 in the limited space inside the tube body 10, so as to improve the space utilization rate inside the expansion tube; based on this, the reflux groove 160 can be arranged between any two of the first channel 110, the second channel 120 and the third channel 130, so as to allow the reflux groove 160 to avoid the weakest part of the peripheral wall of the tube body 10 corresponding to the first channel 110, the second channel 120 and the third channel 130, so as to ensure the structural strength and structural safety of the first channel 110, the second channel 120, the third channel 130 and the distal end of the tube body 10, reduce the risk of damage to the tube body 10, and improve the safety of equipment use.

[0045] In some embodiments, three reflow grooves 160 may be provided on the tube body 10 , and the first channel 110 , the second channel 120 , the third channel 130 and the three reflow grooves 160 are alternately designed in a ring shape.

[0046] In order to improve the comfort of the expansion tube when being placed in the human body cavity, the distal end of the reflux groove 160 can be extended to the gradient section 150, thereby reducing the scratching of the side wall of the reflux groove 160 on the inner wall of the body cavity and improving the smoothness and comfort of the expansion tube placement.

[0047] Embodiment 2:

[0048] The present application embodiment provides a ureteral sheath, such as Figure 1 and Figure 7 As shown, it includes a sheath seat 30, an outer sheath tube 20 and the expansion tube in Example 1, the proximal end of the outer sheath tube 20 is connected to the sheath seat 30, the proximal end of the expansion tube is connected to the sheath seat 30, and the distal end of the expansion tube passes through the outer sheath tube 20.

[0049] During use, the inner wall of the outer sheath 20 and the expansion tube cooperate to be synchronously inserted into the human body cavity along the guide wire. The optical fiber component can be inserted into the third channel 130, and the optical component can collect image information of the distal end of the expansion tube to achieve visual insertion. At the same time, a cleaning fluid can be introduced into the second channel 120 and sprayed out from the distal end of the second channel 120 to flush the distal end of the expansion tube, thereby ensuring that the optical fiber component collects clear image information of the environment at the distal end of the expansion tube and reduces the insertion resistance of the expansion tube.

[0050] To achieve the recovery of the distal ureteral sheath flushing fluid, such as Figure 7As shown, a reflux port 310 can be provided on the sheath seat 30, and the reflux port 310 is connected to the reflux groove 160 on the peripheral wall of the tube body 10. During use, the negative pressure source and the reflux port 310 are connected to form a pressure difference between the reflux port 310 and the distal end of the ureteral sheath, and the flushing liquid is recovered through the reflux groove 160 and the reflux port 310 by the pressure difference; in addition, the proximal end of the reflux groove 160 can be set to be used for gluing with the sheath seat 30, so that the glue is filled between the reflux groove 160 and the inner wall of the sheath seat 30 to achieve gluing between the tube body 10 and the sheath seat 30. At the same time, the solidified glue, in conjunction with the inner wall of the reflux groove 160, can achieve a limiting constraint on the reflux groove 160 to prevent the tube body 10 from rotating circumferentially relative to the sheath seat 30, thereby ensuring the connection stability and structural safety between the outer sheath 20, the expansion tube and the sheath seat 30.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dilation tube, characterized in that: The invention comprises a tube body (10), wherein a first channel (110), a second channel (120) and a third channel (130) are axially arranged in the tube body (10), wherein the first channel (110) is used for passing a guide wire, the second channel (120) is used for passing a fluid, and the third channel (130) is used for passing an optical fiber assembly, and a notch (140) is arranged on a distal peripheral wall of the tube body (10), wherein the notch (140) penetrates the tube body (10) axially to the distal end surface of the tube body (10), and the notch (140) penetrates the tube body (10) radially to communicate with the first channel (110), and the notch (140) is arranged corresponding to the first channel (110).

2. The expansion tube according to claim 1, characterized in that The notch (140) is a wedge-shaped structure.

3. The expansion tube according to claim 2, characterized in that The maximum width of the notch (140) is smaller than the diameter of the first channel (110).

4. The expansion tube according to claim 1, characterized in that The notch (140) is close to the second channel (120) or the third channel (130).

5. The expansion tube according to any one of claims 1 to 4, characterized in that: The tube body (10) comprises a gradient section (150) located at the distal end, and the gradient section (150) gradually decreases from the proximal end to the distal end.

6. The expansion tube according to claim 5, characterized in that A reflux groove (160) is axially arranged on the peripheral wall of the tube body (10).

7. The expansion tube according to claim 6, characterized in that The first channel (110), the second channel (120) and the third channel (130) are arranged around the axis of the tube body (10), and the reflux groove (160) is located between any two of the first channel (110), the second channel (120) and the third channel (130).

8. The expansion tube according to claim 6, characterized in that The distal end of the reflux groove (160) extends to the gradient section (150); And / or, three reflux grooves (160) are provided on the tube body (10).

9. A ureteral sheath, characterized in that: It comprises a sheath seat (30), an outer sheath tube (20) and an expansion tube as claimed in any one of claims 1 to 8, wherein the proximal end of the outer sheath tube (20) is connected to the sheath seat (30), the proximal end of the expansion tube is connected to the sheath seat (30), and the distal end of the expansion tube passes through the outer sheath tube (20).

10. The ureteral sheath according to claim 9, characterized in that: The sheath seat (30) is provided with a reflux port (310), the reflux port (310) is connected to a reflux groove (160) on the peripheral wall of the tube body (10), and the proximal end of the reflux groove (160) is used for bonding with the sheath seat (30).

Images