Sheath tube, sheath base, guide sheath and surgical system

Abstract

The embodiment of the invention provides a sheathing canal, a sheathing base, a guiding sheath and a surgical system.The sheathing canal comprises an inner tube, an outer tube and an outer tube, the inner pipe is sleeved with the outer pipe, and a gap is formed between the outer pipe and the inner pipe; the connecting part is positioned in the gap and is used for connecting the inner pipe and the outer pipe; the number of the connecting parts is multiple, and the multiple connecting parts are distributed in the axial direction of the sheathing canal at intervals and divide the gap into multiple gap units. By the adoption of the technical scheme, the multiple connecting parts are distributed at intervals in the axial direction of the sheath tube, the gap between the outer tube and the inner tube can be divided into the gap units distributed at intervals in the axial direction of the sheath tube, it means that the thickness of the sheath tube at the gap units is smaller than the thickness of the sheath tube at the connecting parts, the bending difficulty of the sheath tube at the gap units can be reduced, and the service life of the sheath tube is prolonged. Therefore, the overall bending difficulty of the sheath tube is reduced, the probability of damage to the inner wall of the ureter can be reduced, and the operation safety is improved.

Description

Technical Field

[0001] The disclosed embodiments relate to the field of medical device technology, and in particular, to a sheath tube, a sheath seat, a guide sheath, and a surgical system. Background Art

[0002] The sheath is a medical device often used in urological surgery (e.g., urinary stone surgery), which is used to establish an interventional channel between the human ureter and the renal pelvis for interventional instruments (e.g., endoscopes, lithotripsy optical fibers, etc.). The ureter has multiple curved sections, and the sheath will damage the inner wall of the ureter when passing through the curved section. Therefore, how to provide a technical solution to reduce the probability of the sheath causing damage to the inner wall of the ureter has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0003] In view of this, an object of the present disclosure is to provide a sheath tube, a sheath seat, a guide sheath and a surgical system to reduce the probability of damage to the inner wall of the ureter.

[0004] The present disclosure provides a sheath tube, comprising:

[0005] Inner tube;

[0006] An outer tube sleeved outside the inner tube, with a gap between the outer tube and the inner tube;

[0007] A connecting portion located in the gap and connecting the inner tube and the outer tube;

[0008] There are multiple connecting parts, which are spaced apart along the axial direction of the sheath tube and divide the gap into multiple gap units.

[0009] Optionally, from the proximal end to the distal end of the sheath tube, the length of each connecting portion along the axial direction of the sheath tube decreases, and / or the length of each gap unit along the axial direction of the sheath tube increases.

[0010] Optionally, the connecting portion includes:

[0011] A plurality of connection units, wherein the cross-sectional shape of the connection unit at the proximal end of the sheath is a straight line; and the cross-sectional shape of the connection unit at the distal end of the sheath is a bend.

[0012] The present disclosure also provides a sheath seat, comprising:

[0013] A guide sub-base, wherein the guide sub-base has a guide channel and a containing cavity;

[0014] A liquid supply sub-seat, wherein the liquid supply sub-seat has a liquid supply channel communicating with the accommodating cavity;

[0015] A negative pressure sub-seat, wherein the negative pressure sub-seat has a negative pressure channel connected to the guide channel;

[0016] Wherein, the liquid supply sub-seat further comprises a first regulating component for regulating the flow of the liquid supply channel, and / or the negative pressure sub-seat further comprises a second regulating component for regulating the flow of the negative pressure channel.

[0017] Optionally, when the liquid supply sub-base has the first regulating component, the liquid supply sub-base also has a first regulating channel connected to the liquid supply channel; the first regulating component includes: a first regulating tube, the proximal end and the distal end of the first regulating tube are both sealed with the liquid supply channel; a first regulating member, one end of the first regulating member is located outside the liquid supply sub-base, and the other end of the first regulating member is inserted through the first regulating channel and contacts with the first regulating tube, and the first regulating member is slidably matched with the first regulating channel;

[0018] When the negative pressure sub-seat has the second adjustment component, the negative pressure sub-seat also has a second adjustment channel connected to the negative pressure channel; the second adjustment component includes: a second adjustment tube, the proximal end and the distal end of the second adjustment tube are both sealed with the negative pressure channel; a second adjustment piece, one end of the second adjustment piece is located outside the negative pressure sub-seat, and the other end passes through the second adjustment channel and then contacts the second adjustment tube, and the second adjustment piece slides with the second adjustment channel.

[0019] Optionally, when the liquid supply sub-base has the first adjustment component, along the axial direction of the first adjustment channel, the first main adjustment surface of the first adjustment member and the first secondary adjustment surface of the first adjustment channel are arranged opposite to each other; the first adjustment component further comprises: a first reset member, the first reset member is sandwiched between the first main adjustment surface and the first secondary adjustment surface to reset the first adjustment member;

[0020] When the negative pressure sub-seat has the second adjustment component, along the axial direction of the second adjustment channel, the second main adjustment surface of the second adjustment member and the second slave adjustment surface of the second adjustment channel are arranged opposite to each other; the second adjustment component also includes: a second reset member, which is clamped between the second main adjustment surface and the second slave adjustment surface to reset the second adjustment member.

[0021] Optionally, when the liquid supply sub-base has the first adjustment component, the first adjustment member has a first interference protrusion, and when the first interference protrusion is outside the first adjustment channel, the first adjustment member is slidably matched with the first adjustment channel and the first adjustment tube is in a conducting state; when the first interference protrusion is located in the first adjustment channel, the first adjustment member is interference matched with the first adjustment channel and the liquid supply tube is in a closed state;

[0022] When the negative pressure sub-seat has the second adjustment component, the second adjustment piece has a second interference protrusion, and when the second interference protrusion is outside the second adjustment channel, the second adjustment piece and the second adjustment channel are slidingly matched and the second adjustment tube is in a conducting state; when the second interference protrusion is located in the second adjustment channel, the second adjustment piece and the second adjustment channel are interference matched and the liquid supply tube is in a closed state.

[0023] Accordingly, the present disclosure also provides a guide sheath, comprising:

[0024] A sheath as described in any of the preceding embodiments;

[0025] The sheath seat has a guide channel and a receiving cavity, wherein the guide channel is communicated with the inner tube of the sheath tube, and the receiving cavity is communicated with the gap of the sheath tube.

[0026] Accordingly, the present disclosure also provides a guide sheath, comprising:

[0027] A sheath holder as described in any of the preceding embodiments;

[0028] The sheath tube comprises an inner tube and an outer tube sleeved outside the inner tube, wherein a gap is provided between the outer tube and the inner tube, wherein the inner tube is communicated with a guide channel of the sheath seat, and the gap is communicated with a receiving cavity of the sheath seat.

[0029] Accordingly, the present disclosure also provides a surgical system, including:

[0030] A sheath as described in any of the preceding embodiments;

[0031] The sheath seat as described in any of the above embodiments, wherein the guide channel of the sheath seat is communicated with the inner tube of the sheath tube, and the accommodating cavity of the sheath seat is communicated with the gap of the sheath tube;

[0032] A liquid supply device, the liquid supply device being in communication with a liquid supply passage of the sheath seat;

[0033] A negative pressure device is connected to the negative pressure channel of the sheath seat.

[0034] The sheath tube of the disclosed embodiment has the following advantages:

[0035] In the sheath provided by the embodiment of the present disclosure, multiple connecting parts are distributed at intervals along the axial direction of the sheath, which can divide the gap between the outer tube and the inner tube into gap units distributed at intervals along the axial direction of the sheath. This means that the thickness of the sheath at the gap units is lower than the thickness at the connecting parts. This can reduce the difficulty of bending the sheath at the gap units, thereby reducing the difficulty of bending the sheath as a whole, and further reducing the probability of damage to the inner wall of the ureter, thereby improving the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of this specification, the drawings required for use in the embodiments of this specification or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 A schematic diagram of the structure of a urinary system is shown;

[0038] Figure 2 A schematic structural diagram of a sheath tube in an embodiment of the present disclosure is shown;

[0039] Figure 3 A longitudinal cross-sectional schematic diagram of a sheath tube in an embodiment of the present disclosure is shown;

[0040] Figure 4 Shows Figure 3 A schematic diagram of a cross section at the AA position in the middle;

[0041] Figure 5 Shows Figure 3 Another cross-sectional view at the AA position in the middle;

[0042] Figure 6 Shows Figure 3 The local schematic diagram of point B in the middle;

[0043] Figure 7 A schematic structural diagram of a guide sheath in an embodiment of the present disclosure is shown;

[0044] Figure 8 A longitudinal cross-sectional schematic diagram of a sheath seat in an embodiment of the present disclosure is shown;

[0045] Fig. 9 An exploded schematic diagram of a first adjustment component in an embodiment of the present disclosure is shown;

[0046] Fig.10 A longitudinal cross-sectional schematic diagram of a first adjustment assembly in an embodiment of the present disclosure is shown;

[0047] Fig.11 An exploded schematic diagram of a second adjustment component in an embodiment of the present disclosure is shown;

[0048] Fig.12 A longitudinal cross-sectional schematic diagram of a second adjustment assembly in an embodiment of the present disclosure is shown;

[0049] Fig.13 An exploded schematic diagram of a first adjusting member in an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0050] As a frequently used instrument in urological surgery (e.g., urinary stone surgery), the sheath is used to establish an interventional channel between the ureter and the renal pelvis for interventional instruments (e.g., endoscopes, lithotripsy optical fibers, etc.). Since the ureter has multiple curved sections, the sheath is likely to damage the inner wall of the ureter when passing through the curved sections.

[0051] In order to enable those skilled in the art to better understand the above problems, the following reference is made to Figure 1 A detailed analysis is given below. Figure 1 , Figure 1 The schematic diagram of the structure of the urinary system is shown. The kidney has a renal pelvis O and a funnel-shaped flat sac structure such as a calyx connected to the renal pelvis O. The renal pelvis O is connected to a ureter P, wherein the ureter P usually has a plurality of curved sections, for example, a curved section formed when the ureter passes over the iliac blood vessels.

[0052] The author discovered in clinical work that the sheath will bend under the action of the ureter P when passing through a curved section. There is an interaction force along the radial direction of the sheath and a sliding friction force along the axial direction of the sheath between the sheath and the inner wall of the ureter P. The more difficult it is to bend the sheath, the greater the above-mentioned force, and the easier it is to damage the inner wall of the ureter and cause postoperative ureteral infection.

[0053] Therefore, how to provide a technical solution to reduce the probability of the sheath causing damage to the inner wall of the ureter has become a technical problem that needs to be urgently solved by those skilled in the art.

[0054] In response to the above technical problems, an embodiment of the present disclosure provides a sheath tube, which includes: an inner tube; an outer tube sleeved outside the inner tube, with a gap between the outer tube and the inner tube; a connecting portion located in the gap and connecting the inner tube and the outer tube; wherein the number of the connecting portions is multiple, and the multiple connecting portions are distributed at intervals along the axial direction of the sheath tube, and the gap is divided into multiple gap units.

[0055] It can be seen that in the sheath provided in the embodiment of the present disclosure, a plurality of connecting portions are distributed at intervals along the axial direction of the sheath, which can divide the gap between the outer tube and the inner tube into gap units distributed at intervals along the axial direction of the sheath. Since no connecting portion is provided at the gap unit, the difficulty of bending the sheath at the gap unit can be reduced, thereby reducing the difficulty of bending the sheath as a whole, thereby reducing the probability of damage to the inner wall of the ureter and improving the safety of the operation.

[0056] In order to enable those skilled in the art to better understand and implement the embodiments of the present disclosure, the concepts, schemes, principles and advantages of the embodiments of the present disclosure are described in detail below with reference to the accompanying drawings and through specific application examples.

[0057] For the convenience of description and easy understanding, in the embodiments of this specification, the terms "proximal end" and "distal end" are first explained, where "proximal end" and "distal end" mainly use the operator as the main reference object, that is, the end close to the operator or far away from the operated object can be considered as the "proximal end", and correspondingly, the end far away from the operator or close to the operated object can be considered as the "distal end".

[0058] Combined with reference Figures 1 to 5 ,in, Figure 2 A schematic diagram of the structure of a sheath tube in an embodiment of the present disclosure is shown. Figure 3 A schematic longitudinal section diagram of the sheath is shown. Figure 4 Shows Figure 3 A cross-sectional diagram at the AA position in the middle. Figure 5 Shows Figure 3 Another cross-sectional diagram at the AA position in the middle, Figure 6 Shows Figure 3 A partial schematic diagram of point B in the middle.

[0059] In this embodiment, the sheath tube 10 may include: an outer tube 11 and an inner tube 12 extending along the axial direction of the sheath tube 10, the outer tube 11 is sleeved outside the inner tube 12, the inner diameter of the outer tube 11 is smaller than the outer diameter of the inner tube 12, so that there is a gap a extending along the axial direction of the sheath tube 10 between the outer tube 11 and the inner tube 12, and when in use, the sheath tube 10 can transport the flushing solution from the proximal end of the sheath tube 10 to the distal end of the sheath tube 10 through the gap a.

[0060] In some examples, the proximal end of the outer tube 11 and the proximal end of the inner tube 12 form a proximal opening of the gap a, and the distal end of the outer tube 11 and the distal end of the inner tube 12 form a distal opening of the gap a. When in use, the flushing solution enters from the proximal opening of the gap a and flows out from the distal opening.

[0061] In some examples, the sheath tube 10 may further include: a connecting portion 13, wherein the connecting portion 13 is located in the gap a, and is used to connect the outer tube 11 and the inner tube 12, and determine the relative position of the inner tube 12 and the outer tube 11. For example, the connecting portion 13 can be used to make the inner tube 12 and the outer tube 11 coaxially arranged, and the relative position along the axial and radial directions of the sheath tube 10 remain unchanged.

[0062] In some examples, the number of the connecting portions 13 may be multiple, and the multiple connecting portions 13 are distributed at intervals along the axial direction of the sheath tube 10, and the gap a is divided into multiple gap units a0. Since the sheath tube 10 is not provided with the connecting portion 13 at the gap unit a0, the thickness of the sheath tube 10 at each gap unit a0 is smaller than the thickness at each connecting portion 13; the connecting portion 13 has a liquid supply hole b, and the liquid supply hole b is used to connect the gap units a0 on both sides of the connecting portion, so that from the proximal end to the distal end of the sheath tube 10, the gap units a0 can be connected to each other, so that the flushing solution can enter from the proximal opening of the gap a and flow out from the distal opening.

[0063] The thickness of the sheath 10 is positively correlated with the bending difficulty and rigidity of the sheath 10. A plurality of connection portions 13 are distributed at intervals along the axial direction of the sheath 10. On the premise of connecting the outer tube 11 and the inner tube 12 and determining the relative positions of the outer tube 11 and the inner tube 12, the thickness of the sheath 10 at each spacing unit a0 can be reduced, thereby reducing the bending difficulty of the sheath 10 at each spacing unit a0 and the bending difficulty of the sheath 10 as a whole. Therefore, the sheath 10 in the embodiment of the present disclosure can reduce the probability of damage to the inner wall of the ureter P and improve the safety of the operation.

[0064] It should be noted that the thickness of the sheath tube 10 at each gap unit a0 is: the sum of the thickness of the outer tube 11 and the inner tube 12 along the radial direction of the sheath tube 10 , and the thickness of the sheath tube 10 at each connection part 13 is: the sum of the thickness of the outer tube 11, the connection part 13 and the inner tube 12 along the radial direction of the sheath tube 10 .

[0065] The bends produced by the curved segments of the ureter are mostly not two-dimensional bends, but three-dimensional bends. Different patients have different curved segments, and different curved segments have different bending directions.

[0066] In some examples, the thickness of the sheath tube 10 along different radial directions at the gap unit a0 is the same, and the bending difficulty of the sheath tube 10 along different directions at the gap unit a0 is the same. In this way, when the sheath tube 10 passes through the curved section of the ureter P at the gap unit a0 of the sheath tube 10, the sheath tube 10 does not need to deliberately select a suitable angle to match the bending direction of the curved section, thereby reducing the difficulty of using the sheath tube 10 and the requirements for the user's clinical experience.

[0067] In this embodiment, the length ratio of the gap unit can be increased from the proximal end to the distal end of the sheath tube 10. In this way, the rigidity and bending difficulty of the sheath tube 10 at the proximal end can be greater than the rigidity and bending difficulty at the distal end, thereby ensuring that the proximal end of the sheath tube 10 and the sheath seat have a sufficiently large connection strength while ensuring that the bending strength of the distal end of the sheath tube 10 is sufficiently small, thereby reducing the probability of causing damage to the inner wall of the ureter and improving the safety of the operation.

[0068] In some examples, the spacing between adjacent connecting portions 13 increases from the proximal end to the distal end of the sheath tube 10; and / or, the axial length of each connecting portion 13 decreases from the proximal end to the distal end of the sheath tube 10, thereby increasing the length proportion of the gap unit from the proximal end to the distal end of the sheath tube 10.

[0069] As one application example, the length of the sheath tube 10 is 35 cm, and the length of the connecting portion 13 where the proximal end of the sheath tube 10 is connected to the sheath seat is 2 cm; from the proximal end of the sheath tube 10 to the distal end of the sheath tube 10, the spacing between adjacent connecting portions 13 is between 2 cm and 8 cm and gradually increases, and the length of each connecting portion 13 along the axial direction of the sheath tube 10 is between 1 mm and 2 cm and gradually decreases.

[0070] It is understood that the above implementation is only an example to illustrate the possible change of the length ratio of the gap unit from the proximal end to the distal end of the sheath, and cannot be understood as a limitation on the change of the length ratio of the gap unit in the present disclosure. For example, in some embodiments, the length ratio of the gap unit can also remain unchanged.

[0071] In this embodiment, the connecting portion 13 may include a plurality of connecting units 130, one end of the connecting unit 130 is connected to the outer tube 11, and the other end is connected to the inner tube 12 to determine the relative position of the outer tube 11 and the inner tube 12, wherein the liquid supply hole b is formed by adjacent connecting units.

[0072] In some examples, the cross-sectional shape of the connection unit 130 can be Figure 4 and / or, a curved shape, such as a C-shape, an S-shape or Figure 5 The V-shape shown in FIG.

[0073] As one application example, the cross-sectional shape of the connecting unit at the proximal end of the sheath is a straight line, and the cross-sectional shape at the distal end of the sheath is a V-shape. Compared with the straight line, the V-shaped connecting unit can better reduce the rigidity of the connecting part, which means that the rigidity and bending difficulty of the sheath at the proximal end are greater than those at the distal end, thereby ensuring that there is a sufficiently large connection strength between the proximal end of the sheath and the sheath seat, while ensuring that the bending strength of the distal end of the sheath is small enough to reduce the chance of damage to the inner wall of the ureter and improve the safety of the operation.

[0074] It is understood that the above implementations are merely examples for illustrating possible implementations of the cross-sectional shape of the connection unit from the proximal end to the distal end of the sheath, and cannot be understood as limiting the change in the cross-sectional shape of the connection unit described in the present disclosure. For example, in some embodiments, the cross-sectional shape of the connection unit at the proximal end and the distal end of the sheath may remain unchanged.

[0075] In some examples, the ratio of the sum of the cross-sectional dimensions of the liquid supply holes on the connection portion to the cross-sectional dimension of the connection portion increases from the proximal end to the distal end of the sheath tube. This means that the rigidity and bending difficulty of the sheath tube at the proximal end are greater than those at the distal end, thereby ensuring that the proximal end of the sheath tube and the sheath seat have a sufficiently large connection strength while ensuring that the bending strength of the distal end of the sheath tube is sufficiently small, thereby reducing the probability of damage to the inner wall of the ureter and improving the safety of the operation.

[0076] As one application example, the number of the liquid supply holes increases from the proximal end of the sheath tube to the distal end of the sheath tube; and / or the size of the liquid supply holes increases from the proximal end of the sheath tube to the distal end of the sheath tube, so that the sum of the cross-sectional dimensions of each liquid supply hole increases from the proximal end of the sheath tube to the distal end of the sheath tube.

[0077] It is understandable that the above implementation is only an example to illustrate the possible change of the sum of the cross-sectional dimensions of each liquid supply hole on the connecting portion from the proximal end to the distal end of the sheath tube, and cannot be understood as a limitation on the change of the sum of the cross-sectional dimensions of each liquid supply hole on the connecting portion described in the present disclosure. For example, in some examples, the sum of the cross-sectional dimensions of each liquid supply hole on the connecting portion remains unchanged from the proximal end to the distal end of the sheath tube.

[0078] In some examples, the sheath tube 10 further has an assembly protrusion 111, and the assembly protrusion 111 is located at the proximal end of the outer tube 11, so that the thickness and rigidity of the proximal end of the outer tube 11 in the radial direction can be increased, thereby increasing the connection strength when plugged with the sheath seat. When the proximal end of the sheath tube is plugged with the sheath seat, in order to facilitate the alignment of the proximal end of the sheath tube with the connection position on the sheath seat, in some examples, the shape of the assembly protrusion 111 can also be set to be a truncated cone.

[0079] In this embodiment, the outer tube 11 is provided with an auxiliary flushing hole c, which is located at the distal end of the outer tube 11. The axial direction of the auxiliary flushing hole c forms a first angle β with the axial direction of the outer tube 11, and the first angle β is greater than 0° and less than 180°. This means that in addition to the distal opening of the gap a, the flushing solution in the gap a can also leave the sheath tube 10 from the auxiliary flushing hole c to flush the side area of ​​the sheath tube 10, thereby improving the flushing effect of the distal end of the sheath tube 10 on the renal pelvis M.

[0080] In some examples, the first angle β can take values ​​of 5°, 30°, 60°, 90°, 120°, 150°, and 175°, respectively.

[0081] In some examples, there are multiple auxiliary flushing holes c, and one auxiliary flushing hole c corresponds to one first angle β, so that more side areas of the sheath 10 can be flushed, which can further improve the flushing effect of the sheath 10 on the renal pelvis.

[0082] In some examples, a plurality of auxiliary flushing holes c are sequentially distributed on the outer tube 11 from the proximal end to the distal end of the sheath tube 10 , and the corresponding first angles β decrease sequentially.

[0083] In some examples, a plurality of auxiliary flushing holes c are distributed on the outer tube 11 along the circumference of the sheath tube 10 , and the corresponding first angles β are the same.

[0084] In some examples, the material of the outer tube may include: at least one of a polymer material or silicone material having biocompatibility and low bending difficulty; wherein the polymer material may include one or more of polyethylene, polypropylene, polyurethane or other materials.

[0085] In some examples, the outer wall of the outer tube also has a hydrophilic coating (not shown in the figure), such as a silane coating or a polyvinyl alcohol coating. The hydrophilic coating can reduce the friction between the sheath and the urinary tract during relative sliding, thereby reducing damage and discomfort during intubation, and the hydrophilic coating can also reduce the biological interaction between the sheath and the urinary tract, thereby reducing the occurrence of inflammation and immune response.

[0086] In some examples, a pressure monitoring device (not shown in the figure) is also provided at the proximal end of the sheath, for example, a piezoresistive pressure sensor or a capacitive pressure sensor. The pressure monitoring device is electrically connected to a monitoring device (not shown in the figure) and is suitable for transmitting the current value and changes of the intra-renal pelvic pressure to the monitoring device, thereby monitoring the intra-renal pelvic pressure in real time.

[0087] Combined with reference Figures 2 to 13 ,in, Figure 7 FIG. 1 shows a schematic structural diagram of a guide sheath in an embodiment of the present disclosure. Figure 8 A longitudinal cross-sectional schematic diagram of a sheath seat in an embodiment of the present disclosure is shown. Fig. 9 An exploded schematic diagram of a first adjustment component in an embodiment of the present disclosure is shown. Fig.10 A longitudinal cross-sectional schematic diagram of a first adjustment component in an embodiment of the present disclosure is shown. Fig.11 An exploded schematic diagram of a second adjustment component in an embodiment of the present disclosure is shown. Fig.12 shows a longitudinal cross-sectional schematic diagram of a second adjustment assembly in an embodiment of the present disclosure, Fig.13 An exploded schematic diagram of a first adjusting member in an embodiment of the present disclosure is shown.

[0088] The disclosed embodiment also provides a sheath seat, and the sheath seat 20 may include: a guide seat 21, and the guide seat may have a guide channel d1 and a receiving cavity d2, wherein the guide channel d1 is connected with the inner tube 12 of the sheath tube 10, and when in use, the interventional instrument enters and exits the renal pelvis through the guide channel d1 and the inner tube 12; the receiving cavity d2 is connected with the gap a of the sheath tube 10, and when in use, the flushing solution enters the renal pelvis through the receiving cavity d2 and the gap a.

[0089] The sheath seat 20 may further include: a liquid supply sub-seat 22, the liquid supply sub-seat 22 may have a liquid supply channel e1, the liquid supply channel e1 is connected to the accommodating chamber d2, when in use, the liquid supply sub-seat 22 is connected to a liquid supply device, and the flushing solution provided by the liquid supply device enters the gap a of the sheath tube 10 through the liquid supply channel e1 and the accommodating chamber d3.

[0090] The sheath seat 20 may also include: a negative pressure sub-seat 23, which may have a negative pressure channel f1, and the negative pressure channel f1 is connected to the guide channel d1. When in use, the negative pressure sub-seat 23 is connected to a negative pressure device, and the negative pressure device is used to provide negative pressure. Under the action of negative pressure, the flushing solution in the renal pelvis is sucked into the negative pressure device through the guide channel d1 and the negative pressure channel f1.

[0091] By adopting the above technical solution, the liquid supply channel e1, the accommodating cavity d2, the gap a, the renal pelvis, the inner tube 12, the guide channel d1 and the negative pressure channel f1 can form a passage, so that the flushing solution can carry the stones in the renal pelvis away from the renal pelvis along the above passage.

[0092] In some examples, the accommodating cavity d2 is an annular groove formed along the circumference of the guide channel d1 on the outer side of the distal end of the guide channel d1, and the proximal end of the sheath tube 10 is fixed in the accommodating cavity d2. For example, the proximal end of the sheath tube 10 is plug-fitted or threadedly fitted with the accommodating cavity d2, so that the inner tube 12 of the sheath tube 10 is connected to the guide channel d1, and the gap a of the sheath tube 10 is connected to the accommodating cavity d2.

[0093] In some examples, the guide sub-seat 21, the liquid supply sub-seat 22 and the negative pressure sub-seat 23 can be integrally formed.

[0094] The author has found in clinical practice that the amount of fluid in the renal pelvis affects the renal pelvic pressure. When the renal pelvic pressure is higher or lower than the safe range, kidney damage will occur. In the prior art, the amount of fluid in the renal pelvis is adjusted by adjusting the power of the fluid supply device or the negative pressure device. However, during surgery, since the patient is located directly in front of the operator and the fluid supply device or the negative pressure device is located to the side of the operator, the operator needs to move (for example, turn around) a certain distance when adjusting the power of the fluid supply device or the negative pressure device.

[0095] In this embodiment, the liquid supply sub-seat 22 is provided with: a first adjusting component 24, which is suitable for adjusting the flow of the liquid supply channel e1 to adjust the amount of liquid entering the renal pelvis, which means that the operator does not need to turn around and can directly adjust the renal pelvic pressure through the first adjusting component 24 of the sheath seat 20 to keep the renal pelvic pressure within a safe range.

[0096] In this embodiment, the liquid supply sub-base 22 may further have a first regulating channel e2, and the first regulating channel e2 is communicated with the liquid supply channel e1, wherein the axial direction of the first regulating channel e2 may be perpendicular to the axial direction of the liquid supply channel e1;

[0097] The first regulating assembly 24 may include: a first regulating tube 241 located in the liquid supply channel e1 and a first regulating member 242 located in the first regulating channel e2 . The first regulating member 242 regulates the flow of the liquid supply channel e1 by changing the inner diameter of the first regulating tube 241 .

[0098] In some examples, the proximal end and the distal end of the first regulating tube 241 are sealed with the inner wall of the liquid supply channel e1, so that the solution in the liquid supply channel e1 must pass through the first regulating tube 241 before entering the accommodating chamber d2; one end of the first regulating member 242 is located outside the liquid supply sub-seat 22, and the other end passes through the first regulating channel e2 and abuts against the position between the proximal end and the distal end of the first regulating tube 241, and the first regulating member 242 slides with the first regulating channel e2.

[0099] By adopting the above technical solution, the first adjusting member 242 is driven along the axial direction of the first adjusting channel e2, and the first adjusting member 242 slides in the first adjusting channel e2 and squeezes the first adjusting tube 241. During the sliding process, the inner diameter of the first adjusting tube 241 changes, thereby realizing the adjustment of the flow rate of the liquid supply channel e1.

[0100] In some examples, the first adjustment tube 241 is a tubular structure made of an elastic material, wherein the elastic material may include at least one material such as silicone, latex, etc.

[0101] In some examples, a first extrusion portion 243 may be provided at the end of the first adjusting member 242 that contacts the first adjusting tube 241 . The first extrusion portion 243 and the first adjusting member 242 form a T-shape. The contact area between the first extrusion portion 243 and the first adjusting tube 241 is larger, so that the first adjusting tube 241 can be better squeezed.

[0102] In some examples, the first extrusion portion 243 can be detachably connected to the first adjusting member 242, for example, by plugging or bonding, so that the first adjusting member 242 can be connected to the first adjusting member 242 after passing through the first adjusting channel e2, so that the outer diameter of the first extrusion portion 243 can be larger than the inner diameter of the first adjusting channel e2.

[0103] In some examples, a first pressing portion 244 may be provided at the end of the first adjusting member 242 away from the first adjusting tube 241. The first pressing portion 244 forms a T-shape with the first adjusting member 242. When pressed, the contact area between the first pressing portion 244 and the operator is larger, which can increase the experience of pressing the first adjusting member 242.

[0104] In some examples, the first adjustment component 24 may further include: a first buffer member 245, wherein the first buffer member 245 is disposed on the first adjustment member 242 and is located between the first adjustment member 242 and the first adjustment tube 241, wherein the Young's modulus of the material forming the first buffer member 245 is smaller than the Young's modulus of the material forming the first adjustment member 242, thereby reducing damage to the first adjustment tube 241 during the extrusion process.

[0105] In some examples, the material of the first adjusting member 242 may include: one or more of polycarbonate, polypropylene, etc., and the material of the first buffer member 245 may include: one or more of silicone, latex, etc.

[0106] In this embodiment, the first adjusting member 242 may also have a first main adjusting surface g1, and the first adjusting channel e2 may also have a first secondary adjusting surface g2, and along the axial direction of the first adjusting channel e2, the first main adjusting surface g1 and the first secondary adjusting surface g2 are relatively arranged; the first adjusting component 24 may also include: a first resetting member 246, the first resetting member 246 is clamped between the first main adjusting surface g1 and the first secondary adjusting surface g2, and is used to reset the first adjusting member 242 after the first adjusting member 242 squeezes the first adjusting tube 241.

[0107] When the first adjusting member 242 is pressed, the first adjusting member 242 slides relative to the first adjusting channel e2, the distance between the first main adjusting surface g1 and the first slave adjusting surface g2 is reduced, the first adjusting tube 241 is squeezed to reduce the inner diameter, and the first reset member 246 is compressed; when the pressing of the first adjusting member 242 stops, the first adjusting member 242 can slide in the opposite direction under the action of the first reset member 246, and the inner diameter of the first adjusting tube 241 increases due to its own elasticity.

[0108] In some examples, the portion of the first adjustment member 242 located in the first adjustment channel e2 is stepped, and the first main adjustment surface g1 is a stepped surface; the first adjustment channel e2 has a first adjustment protrusion 247, and the first adjustment protrusion 247 can be a protruding ring or a protruding point, and the first secondary adjustment surface g2 is the surface of the first adjustment protrusion 247.

[0109] In some examples, the portion of the first adjustment member located in the first adjustment channel is stepped, and the first main adjustment surface is a stepped surface; the port of the first adjustment channel away from the first adjustment tube is a stepped groove, and the first secondary adjustment surface is the stepped surface of the stepped groove.

[0110] In some examples, the first restoring member 246 may be an elastic device such as a spring or a compression spring.

[0111] In some examples, the first adjusting member 242 may include a first main adjusting portion 2421, a first slave adjusting portion 2422 and a first adjusting reset member 2423, the first main adjusting portion 2421 having a first plug-in slot j1, the first adjusting reset member 2423 being located in the first plug-in slot, one end of the first slave adjusting member 2422 being located in the first plug-in slot j1 and in conflict with the first adjusting reset member 2423, and the first slave adjusting member 2422 slidingly cooperates with the first plug-in slot j1.

[0112] In this way, when the first regulating tube 241 is in a closed state, even if the first regulating member 242 is driven to continue squeezing the first regulating tube 241, the first regulating member 242 can also cause relative slip between the first main regulating part 2421 and the first slave regulating member 2422 through the first regulating reset member 2423, thereby reducing the probability of damage and leakage of the first regulating tube 241 due to excessive squeezing.

[0113] In some examples, the first adjustment reset member 2423 can be an elastic device such as a spring or a compression spring.

[0114] In this embodiment, the first adjusting member 242 may also have a first interference protrusion 248, and the first interference protrusion 248 may be a convex ring or a convex point. When the first interference protrusion 248 is outside the first adjusting channel e2, the first adjusting member 242 and the first adjusting channel e2 can be slidably matched and the first adjusting tube 241 is in a conducting state. At this time, the first adjusting member 242 can be reset under the action of the first reset member 246; when the first interference protrusion 248 is located in the first adjusting channel e2, the first adjusting member 242 and the first adjusting channel e2 are interference matched and the first adjusting tube 241 is in a closed state. At this time, the reset force provided by the first reset member 246 is not greater than the static friction between the first interference protrusion 248 and the first adjusting channel e2, and the first adjusting member 242 cannot be reset, and the first adjusting tube 241 remains in a closed state.

[0115] In some examples, the first interference protrusion 248 has a smooth transition with the surface of the first adjusting member 242 on one side facing the first adjusting channel e2, so that when the first adjusting member 242 is pressed, the first interference protrusion 248 can at least partially enter the first adjusting channel e2, thereby achieving an interference fit between the first adjusting member 242 and the first adjusting channel e2.

[0116] In some examples, the end surface of the first pressing portion 244 facing the first adjusting channel e2 is an arc surface, which can increase the gap between the edge of the first pressing portion 244 and the side wall of the liquid supply sub-holder 22. When the first adjusting member 242 and the first adjusting channel e2 are interference fit, the operator applies force from the gap between the two, thereby being able to move the first interference protrusion 248 to the outside of the first adjusting channel e2, and converting the first adjusting tube 241 from a closed state to a conductive state.

[0117] In some examples, the number of the first adjustment channels e2 is two, and the two first adjustment channels e2 are coaxially arranged on both sides of the liquid supply channel e1; accordingly, the number of the first adjustment members 242 is two, and the two first adjustment members 242 are respectively arranged in the corresponding first adjustment channels e2, and both are in conflict with the first adjustment tube 241. In this way, one-hand operation can be achieved, reducing the difficulty of operation. At the same time, the axial direction of the first adjustment channel e2 is perpendicular to the axial direction of the liquid supply channel e1, which can reduce the torque during one-hand operation, thereby reducing the probability of driving the sheath seat 20 and the sheath tube 10 to move, thereby reducing the probability of friction between the sheath tube and the ureter during one-hand operation, thereby further reducing the risk of surgery.

[0118] In some examples, the liquid supply sub-base 22 may include: a first liquid supply part 221, a second liquid supply part 222 and a third liquid supply part 223, the first regulating channel e2 is opened in the second liquid supply part 222, and the proximal end and the distal end of the second liquid supply part 222 are detachably connected to the first liquid supply part 221 and the third liquid supply part 223, respectively, such as threaded or plug-in;

[0119] Correspondingly, the proximal and distal ends of the first regulating tube 241 both have a first mounting protrusion 249, such as a convex ring; the first mounting protrusion 249 at the proximal end of the first regulating tube 241 is clamped between the first liquid supply part 221 and the second liquid supply part 222 to achieve a sealed fit and fixation between the proximal end of the first regulating tube 241 and the liquid supply channel e1, and the first mounting protrusion 249 at the distal end of the first regulating tube 241 is clamped between the second liquid supply part 222 and the third liquid supply part 223 to achieve a sealed fit and fixation between the distal end of the first regulating tube 241 and the liquid supply channel e1.

[0120] As a specific example, the distal end of the first liquid supply part 221 has a threaded groove, the proximal end of the second liquid supply part 222 is threadedly matched with the distal end of the first liquid supply part 221, and the proximal end of the third liquid supply part 223 has a threaded groove, and the distal end of the second liquid supply part 222 is threadedly matched with the proximal end of the third liquid supply part 223. In this way, the relative distance between the first liquid supply part 221 and the second liquid supply part 222, as well as the relative distance between the second liquid supply part 222 and the third liquid supply part 223 can be adjusted, which is convenient for adjusting the installation strength of the first mounting protrusion 249 at the proximal end of the first adjusting tube 241.

[0121] In some examples, the proximal end and the distal end of the first regulating tube may also be adhered and fixed to the liquid supply channel, respectively.

[0122] In some examples, along the axial direction of the liquid supply channel e1, the outer diameter of the second liquid supply portion 222 is larger than the outer diameters of the first liquid supply portion 221 and the third liquid supply portion 223. This allows a thinner shell to be used at the first liquid supply portion 221 and the third liquid supply portion 223 while providing sufficient sliding distance for the first adjusting member 242.

[0123] In this embodiment, the negative pressure sub-seat 23 can be provided with: a second adjusting component 25, which is suitable for adjusting the flow of the negative pressure channel f1 to adjust the amount of liquid leaving the renal pelvis, which means that the operator does not need to turn around and can directly adjust the intra-renal pelvic pressure through the second adjusting component 25 of the sheath seat 20 to keep the intra-renal pelvic pressure within a safe range.

[0124] In this embodiment, the negative pressure sub-seat 23 may further have a second regulating channel f2, and the second regulating channel f2 is connected to the negative pressure channel f1, wherein the axial direction of the second regulating channel f2 may be perpendicular to the axial direction f1 of the negative pressure channel;

[0125] The second regulating assembly 25 may include: a second regulating tube 251 located in the negative pressure channel f1 and a second regulating member 252 located in the second regulating channel f2 , and the second regulating member 252 regulates the flow of the negative pressure channel f1 by changing the inner diameter of the second regulating tube 251 .

[0126] In some examples, the proximal end and the distal end of the second regulating tube 251 are sealed with the inner wall of the negative pressure channel f1, so that the solution in the negative pressure channel f1 must pass through the second regulating tube 251 before entering the negative pressure device; one end of the second regulating member 252 is located outside the negative pressure sub-seat 23, and the other end passes through the second regulating channel f2 and abuts against the position between the proximal end and the distal end of the second regulating tube 251, and the second regulating member 252 slides with the second regulating channel f2.

[0127] By adopting the above technical solution, the second adjusting member 252 is driven along the axial direction of the second adjusting channel f2, and the second adjusting member 252 slides in the second adjusting channel f2 and squeezes the second adjusting tube 251. During the sliding process, the inner diameter of the second adjusting tube 251 changes, thereby realizing the regulation of the flow of the negative pressure channel f1.

[0128] In some examples, the second adjustment tube 251 is a tubular structure made of an elastic material, wherein the elastic material may include at least one material such as silicone, latex, etc.

[0129] In some examples, a second extrusion portion 253 may be provided at the end of the second adjusting member 252 that contacts the second adjusting tube 251. The second extrusion portion 253 and the second adjusting member 252 form a T-shape. The contact area between the second extrusion portion 253 and the second adjusting tube 251 is larger, so that the second adjusting tube 251 can be better squeezed.

[0130] In some examples, the second extrusion portion 253 can be detachably connected to the second adjusting member 252, such as by plugging or bonding, so that the second adjusting member 252 can be connected to the second adjusting member 252 after passing through the second adjusting channel f2, thereby making the outer diameter of the second extrusion portion 253 larger than the inner diameter of the second adjusting channel f2.

[0131] In some examples, a second pressing portion 254 may be provided at the end of the second adjusting member 252 away from the second adjusting member 252, and the second pressing portion 254 forms a T-shape with the second adjusting member 252. When pressed, the contact area between the second pressing portion 254 and the operator is larger, which can increase the experience of pressing the second adjusting member 252.

[0132] In some examples, the second adjustment component 25 may further include: a second buffer member 255, wherein the second buffer member 255 is disposed on the second adjustment member 252 and is located between the second adjustment member 252 and the second adjustment tube 251, wherein the Young's modulus of the material forming the second buffer member 255 is smaller than the Young's modulus of the material forming the second adjustment member 252, thereby reducing damage to the second adjustment tube 251 during the extrusion process.

[0133] In some examples, the material of the second adjusting member 252 may include: one or more of polycarbonate, polypropylene, etc., and the material of the second buffer member 255 may include: one or more of silicone, latex, etc.

[0134] In this embodiment, the second adjusting member 252 may also have a second main adjusting surface h1, and the second adjusting channel f2 may also have a second secondary adjusting surface h2. Along the axial direction of the second adjusting channel f2, the second main adjusting surface h1 and the second secondary adjusting surface h2 are arranged opposite to each other; the second adjusting component 25 may also include: a second resetting member 256, which is clamped between the second main adjusting surface h1 and the second secondary adjusting surface h2, and is used to reset the second adjusting member 252 after the second adjusting member 252 squeezes the second adjusting tube 251.

[0135] When the second adjusting member 252 is pressed, the second adjusting member 252 slides relative to the second adjusting channel f2, the distance between the second main adjusting surface h1 and the second slave adjusting surface h2 is reduced, the second adjusting tube 251 is squeezed to reduce the inner diameter, and the second reset member 256 is compressed; when the pressing of the second adjusting member 252 stops, the second adjusting member 252 can slide in the opposite direction under the action of the second reset member 256, and the inner diameter of the second adjusting tube 251 increases due to its own elasticity.

[0136] In some examples, the portion of the second adjustment member 252 located in the second adjustment channel f2 is stepped, and the second main adjustment surface h1 is a stepped surface; the second adjustment channel f2 has a second adjustment protrusion 257, and the second adjustment protrusion 257 can be a protruding ring or a protruding point, and the second secondary adjustment surface h2 is the surface of the second adjustment protrusion 257.

[0137] In some examples, the portion of the second adjustment member located in the second adjustment channel is stepped, and the second main adjustment surface is a stepped surface; the port of the second adjustment channel away from the second adjustment tube is a stepped groove, and the second secondary adjustment surface is the stepped surface of the stepped groove.

[0138] In some examples, the second restoring member 256 may be an elastic device such as a spring or a compression spring.

[0139] In some examples, the second adjusting member 252 may include a second main adjusting portion, a second slave adjusting portion, and a second adjusting reset member, the second main adjusting portion having a second plug-in slot, the second adjusting reset member being located in the second plug-in slot, one end of the second slave adjusting member being located in the second plug-in slot and abutting against the second adjusting reset member, and the second slave adjusting member slidingly fitting with the second plug-in slot.

[0140] Thus, when the second regulating tube is in the closed state, even if the second regulating member is driven to continue to squeeze the second regulating tube, the second regulating member can cause relative slip between the second main regulating part and the second slave regulating member through the second regulating reset member, thereby reducing the probability of damage and leakage of the second regulating tube caused by excessive squeezing. Fig.13 The arrangement of the components in the first adjusting member is shown in FIG.

[0141] In some examples, the second adjustment and reset member may be an elastic device such as a spring or a compression spring.

[0142] In this embodiment, the second adjusting member 252 may further have a second interference protrusion 258, and the second interference protrusion 258 may be a convex ring or a convex point. When the second interference protrusion 258 is outside the second adjusting channel f2, the second adjusting member 252 and the second adjusting channel f2 may be slidably matched and the second adjusting tube 251 is in a conducting state. At this time, the second adjusting member 252 may be reset under the action of the second reset member 256; when the second interference protrusion 258 is located in the second adjusting channel f2, the second adjusting member 252 and the second adjusting channel f2 are interference matched and the second adjusting tube 251 is in a closed state. At this time, the reset force provided by the second reset member 256 is not greater than the static friction force between the second interference protrusion 258 and the second adjusting channel f2, and the second adjusting member 252 cannot be reset, and the second adjusting tube 251 remains in a closed state.

[0143] In some examples, the second interference protrusion 258 has a smooth transition with the surface of the second adjusting member 252 on one side facing the second adjusting channel f2, so that when the second adjusting member 252 is pressed, the second interference protrusion 258 can at least partially enter the second adjusting channel f2, thereby achieving an interference fit between the second adjusting member 252 and the second adjusting channel f2.

[0144] In some examples, the end surface of the second pressing portion 254 facing the second adjusting channel f2 is an arc surface, which can increase the gap between the edge of the second pressing portion 254 and the side wall of the negative pressure sub-seat 23. When the second adjusting member 252 and the second adjusting channel f2 are interference fit, the operator applies force from the gap between the two, thereby being able to move the second interference protrusion 258 outside the second adjusting channel f2, and converting the second adjusting tube 251 from a closed state to a conductive state.

[0145] In some examples, the number of the second regulating channels f2 is two, and the two second regulating channels f2 are coaxially arranged on both sides of the negative pressure channel f1; accordingly, the number of the second regulating members 252 is two, and the two second regulating members 252 are respectively arranged in the corresponding second regulating channels f2, and both are in conflict with the second regulating tube 251. In this way, one-hand operation can be achieved, reducing the difficulty of operation. At the same time, the axial direction of the first regulating channel e2 is perpendicular to the axial direction of the liquid supply channel e1, which can reduce the torque during one-hand operation, thereby reducing the probability of driving the sheath seat 20 and the sheath tube 10 to move, thereby reducing the probability of friction between the sheath tube and the ureter during one-hand operation, thereby further reducing the risk of surgery.

[0146] In some examples, the negative pressure sub-seat 23 may include: a first negative pressure portion 231, a second negative pressure portion 232 and a third negative pressure portion 233, the second adjustment channel f2 is opened in the second negative pressure portion 232, and the proximal end of the second negative pressure portion is detachably connected to the first negative pressure portion and the third negative pressure portion, respectively, such as by plug-in fitting or threaded fitting;

[0147] Correspondingly, the proximal and distal ends of the second regulating tube 251 both have a second mounting protrusion 259, such as a convex ring; the second mounting protrusion 259 at the proximal end of the second regulating tube 251 is clamped between the first negative pressure portion 231 and the second negative pressure portion 232 to achieve a sealed fit and fixation between the proximal end of the second regulating tube 251 and the negative pressure channel f1, and the second mounting protrusion 259 at the distal end of the second regulating tube 251 is clamped between the second negative pressure portion 232 and the third negative pressure portion 233 to achieve a sealed fit and fixation between the distal end of the second regulating tube 251 and the negative pressure channel f1.

[0148] As a specific example, the distal end of the first negative pressure portion 231 has a thread groove (not shown in the figure), and the proximal end of the second negative pressure portion 232 is threadedly matched with the distal end of the first negative pressure portion 231, so that the relative distance between the first negative pressure portion 231 and the second negative pressure portion 232 can be adjusted, so as to facilitate adjusting the installation strength of the first mounting protrusion 249 at the proximal end of the second adjusting tube 251 in the negative pressure channel f1;

[0149] The proximal end of the third negative pressure part 233 has a thread groove (not shown in the figure), and the distal end of the second negative pressure part 232 is threadedly matched with the proximal end of the third negative pressure part 233, so that the relative distance between the second negative pressure part 232 and the third negative pressure part 233 can be adjusted, which facilitates the adjustment of the installation strength of the first mounting protrusion 249 at the distal end of the second adjusting tube 251 in the negative pressure channel f1.

[0150] In some examples, the proximal end and the distal end of the second regulating tube 251 may also be adhered and fixed to the negative pressure channel respectively.

[0151] In some examples, along the axial direction of the negative pressure channel f1, the outer diameter of the second negative pressure portion 232 is greater than the outer diameters of the first negative pressure portion 231 and the third negative pressure portion 233. This allows a thinner shell to be used at the first negative pressure portion 231 and the third negative pressure portion 233 while providing sufficient sliding distance for the second adjusting member 252.

[0152] As one of the application examples, when adjusting the pressure inside the renal pelvis, first, the liquid supply device and the negative pressure device are turned on with the corresponding preset powers respectively. When it is found that the pressure inside the renal pelvis is too high, the first adjusting member 242 is pressed to make the flow of the liquid supply channel e1 lower than the flow of the negative pressure channel f1, and according to the situation, it is selected whether to notify other operators to reduce the power of the liquid supply device to ensure that the pressure inside the renal pelvis is still within a safe range after the first adjusting member 242 is reset based on the first reset member 246 or reset by external force; when it is found that the pressure inside the renal pelvis is too low, the second adjusting member 252 is pressed until the flow of the liquid supply channel e1 is higher than the flow of the negative pressure channel f1, and according to the situation, it is selected whether to notify other operators to increase the power of the liquid supply device or reduce the power of the negative pressure device to ensure that the pressure inside the renal pelvis is still within a safe range after the second adjusting member 252 is reset based on the second reset member 256 or reset by external force.

[0153] In this embodiment, the guide seat 21 may include: a third adjustment component 26. When the interventional instrument enters the guide channel d1, the third adjustment component 26 can adjust the gap between the interventional instrument and the guide channel d1 to prevent the flushing solution in the guide channel d1 from splashing out of the sheath seat 20 from the gap.

[0154] In this embodiment, the proximal opening of the guide channel d1 is formed with a receiving groove (not shown in the figure), and the receiving groove is a step groove; the third adjustment component 26 may include: a sealing member 261 and a third adjustment member 262, wherein the third adjustment member 262 is snap-fitted or threadedly fitted with the receiving groove d3, and the sealing member 261 is sandwiched between the third adjustment member 262 and the groove bottom of the receiving groove. When in use, by pressing or rotating the third adjustment member 262 to adjust the spacing between the third adjustment member 262 and the groove bottom of the receiving groove, the radial dimension of the sealing member 261 along the receiving groove can be adjusted, thereby adjusting the gap between the interventional instrument and the guide channel d1.

[0155] In some examples, the seal 261 is a tubular structure made of elastic material, so that the interventional instrument can enter and exit the guide channel d1 through the seal 261; wherein the elastic material may include at least one material such as silicone, latex, etc.

[0156] In some examples, the third adjusting member 262 is a tubular structure, so that the interventional instrument can pass through the third adjusting member 262 to enter and exit the guide channel d1 .

[0157] In some examples, the third adjustment component 26 may also include: an intermediate piece (not shown in the figure), which is clamped between the third adjustment piece 262 and the seal 261, and the friction coefficient of the intermediate piece is smaller than the friction coefficient of the seal 261, so that the intermediate piece can alleviate the distortion of the seal 261 when the third adjustment piece 262 rotates relative to the seal 261, thereby improving the sealing performance of the seal 261.

[0158] In some examples, the middle piece is an annular structure, so that the interventional instrument can pass through the middle piece to enter and exit the guide channel d1.

[0159] In some examples, the material of the middle piece may include one or more of polystyrene, polycarbonate, polyvinyl chloride, or polypropylene.

[0160] As one application example, when the flushing solution is used to flush stones in the renal pelvis, the interventional instrument such as an endoscope is still in the guide channel d1. At this time, by rotating or pressing the third adjustment member 262, the gap between the endoscope and the guide channel d1 can be sealed, thereby preventing the flushing solution in the guide channel d1 from splashing out of the sheath seat 20 from the gap.

[0161] As one application example, when flushing is completed, the interventional instrument is removed. At this time, the third adjusting member 262 can be further rotated or pressed to seal the proximal end of the guide channel d1; and the first adjusting member 242 and the second adjusting member 252 are pressed to close the liquid supply channel e1 and the negative pressure channel f1. At this time, only the distal end of the sheath tube 10 of the guide sheath is connected to the outside world. After the sheath tube 10 is moved out of the ureter, the residual liquid in the guide sheath will remain in the guide sheath under the action of air pressure, thereby facilitating the collection of postoperative flushing solution and the cleaning of the operating table.

[0162] Accordingly, combined with reference Figures 2 to 12 The disclosed embodiment also provides a guide sheath, which includes: a sheath seat 20 and a sheath tube 10, wherein the sheath seat 20 is connected to the sheath tube 10, wherein the sheath seat 20 can adopt the sheath seat in any of the aforementioned embodiments; the sheath tube 10 can adopt the sheath tube in any of the aforementioned embodiments.

[0163] Accordingly, combined with reference Figures 2 to 12The embodiment of the present disclosure also provides a surgical system, which includes: the sheath tube 10 described in any of the aforementioned examples, and the sheath seat 20 described in any of the aforementioned examples, the sheath seat 20 being connected to the sheath tube 10; a liquid supply device, the liquid supply device is connected to the liquid supply sub-seat of the guide sheath, and is used to provide a flushing solution to the liquid supply channel of the liquid supply sub-seat; a negative pressure device, the negative pressure device is connected to the negative pressure sub-seat of the guide sheath, and is used to aspirate the flushing solution from the negative pressure channel of the negative pressure sub-seat.

[0164] It can be understood that the above describes multiple implementation schemes provided by the embodiments of the present invention. The optional implementation methods and specific examples introduced in each implementation scheme can be combined and cross-referenced with each other without conflict, thereby extending a variety of possible implementation schemes, which can all be considered as the implementation schemes disclosed and open to the public by the present invention.

[0165] It should be noted that the “examples” or “embodiments” referred to in this specification refer to specific features, structures or characteristics that may be included in at least one implementation of an embodiment of the present invention. And in the description of this specification, the terms “first”, “second”, “third”, etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined by the terms “first”, “second”, “third”, etc. may explicitly or implicitly include one or more of the features. Moreover, the terms “first”, “second”, “third”, etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or to express importance. It is understood that the terms used in this way can be interchangeable where appropriate so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0166] Although the embodiments of the present disclosure are disclosed as above, the present disclosure is not limited thereto. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of this specification shall be subject to the scope defined by the claims.

Claims

1. A sheath tube, characterized in that: include: Inner tube; An outer tube sleeved outside the inner tube, with a gap between the outer tube and the inner tube; A connecting portion located in the gap and connecting the inner tube and the outer tube; There are multiple connecting parts, which are spaced apart along the axial direction of the sheath tube and divide the gap into multiple gap units.

2. The sheath tube according to claim 1, characterized in that: From the proximal end to the distal end of the sheath tube, the length of each connecting portion along the axial direction of the sheath tube decreases, and / or the length of each gap unit along the axial direction of the sheath tube increases.

3. The sheath tube according to claim 1, characterized in that: The connecting portion comprises: A plurality of connection units, wherein the cross-sectional shape of the connection unit at the proximal end of the sheath is a straight line; and the cross-sectional shape of the connection unit at the distal end of the sheath is a bend.

4. A sheath seat, characterized in that: include: A guide sub-base, wherein the guide sub-base has a guide channel and a containing cavity; A liquid supply sub-seat, wherein the liquid supply sub-seat has a liquid supply channel communicating with the accommodating cavity; A negative pressure sub-seat, wherein the negative pressure sub-seat has a negative pressure channel connected to the guide channel; Wherein, the liquid supply sub-seat further comprises a first regulating component for regulating the flow of the liquid supply channel, and / or the negative pressure sub-seat further comprises a second regulating component for regulating the flow of the negative pressure channel.

5. The sheath seat according to claim 4, characterized in that: When the liquid supply sub-base has the first regulating component, the liquid supply sub-base also has a first regulating channel connected to the liquid supply channel; the first regulating component includes: a first regulating tube, the proximal end and the distal end of the first regulating tube are both sealed with the liquid supply channel; a first regulating member, one end of the first regulating member is located outside the liquid supply sub-base, and the other end of the first regulating member is inserted through the first regulating channel and contacts with the first regulating tube, and the first regulating member is slidably matched with the first regulating channel; When the negative pressure sub-seat has the second adjustment component, the negative pressure sub-seat also has a second adjustment channel connected to the negative pressure channel; the second adjustment component includes: a second adjustment tube, the proximal end and the distal end of the second adjustment tube are both sealed with the negative pressure channel; a second adjustment piece, one end of the second adjustment piece is located outside the negative pressure sub-seat, and the other end passes through the second adjustment channel and then contacts the second adjustment tube, and the second adjustment piece slides with the second adjustment channel.

6. The sheath seat according to claim 5, characterized in that: When the liquid supply sub-base has the first adjustment component, along the axial direction of the first adjustment channel, the first main adjustment surface of the first adjustment member and the first secondary adjustment surface of the first adjustment channel are arranged opposite to each other; The first adjustment component further includes: a first reset member, the first reset member being sandwiched between the first main adjustment surface and the first slave adjustment surface to reset the first adjustment member; When the negative pressure sub-seat has the second adjustment component, along the axial direction of the second adjustment channel, the second main adjustment surface of the second adjustment member and the second slave adjustment surface of the second adjustment channel are arranged opposite to each other; the second adjustment component also includes: a second reset member, which is clamped between the second main adjustment surface and the second slave adjustment surface to reset the second adjustment member.

7. The sheath seat according to claim 5, characterized in that: When the liquid supply sub-base has the first adjustment component, the first adjustment member has a first interference protrusion, and when the first interference protrusion is outside the first adjustment channel, the first adjustment member and the first adjustment channel are slidably matched and the first adjustment tube is in a conducting state; when the first interference protrusion is inside the first adjustment channel, the first adjustment member and the first adjustment channel are interference matched and the liquid supply tube is in a closed state; When the negative pressure sub-seat has the second adjustment component, the second adjustment piece has a second interference protrusion, and when the second interference protrusion is outside the second adjustment channel, the second adjustment piece and the second adjustment channel are slidingly matched and the second adjustment tube is in a conducting state; when the second interference protrusion is located in the second adjustment channel, the second adjustment piece and the second adjustment channel are interference matched and the liquid supply tube is in a closed state.

8. A guide sheath, characterized in that: include: The sheath tube according to any one of claims 1 to 3; The sheath seat has a guide channel and a receiving cavity, wherein the guide channel is communicated with the inner tube of the sheath tube, and the receiving cavity is communicated with the gap of the sheath tube.

9. A guide sheath, characterized in that: include: The sheath seat according to any one of claims 4 to 7; The sheath tube comprises an inner tube and an outer tube sleeved outside the inner tube, wherein a gap is provided between the outer tube and the inner tube, wherein the inner tube is communicated with a guide channel of the sheath seat, and the gap is communicated with a receiving cavity of the sheath seat.

10. A surgical system, characterized in that: include: The sheath tube according to any one of claims 1 to 3; The sheath seat according to any one of claims 4 to 7, wherein the guide channel of the sheath seat is in communication with the inner tube of the sheath tube, and the accommodating cavity of the sheath seat is in communication with the gap of the sheath tube; A liquid supply device, the liquid supply device is connected to the liquid supply channel of the sheath seat; A negative pressure device is connected to the negative pressure channel of the sheath seat.

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