Catheter hub, catheter sheath and catheter system

Abstract

The embodiment of the present application provides a catheter seat, a catheter sheath and a catheter system, wherein the catheter seat comprises an adjusting member, a shell and an elastic member; the elastic member is used for exerting a reset force for resetting the catheter seat; the adjusting member comprises a first structure, the first structure is used for adjusting a state of the catheter seat, and the state of the catheter seat comprises a reset state and a use state; the shell comprises a second structure associated with the reset state; when the first structure cooperates with the second structure, a limiting force for limiting the reset of the catheter seat disappears, so that the catheter seat is adjusted to the reset state under the action of the reset force. By adopting the technical scheme, the reset of the catheter seat can be realized.

Description

Technical Field

[0001] The present invention relates to the field of medical device technology, and in particular to a catheter seat, catheter sheath and catheter system. Background Technology

[0002] A catheter sheath is a medical device used to establish vascular access. After the catheter sheath is inserted into a blood vessel, the guide device (such as a catheter, guidewire, or other surgical instrument used in vascular interventional procedures) can be inserted through the catheter sheath into the vascular access for subsequent targeted therapeutic procedures.

[0003] During use, the size of the insertion channel for surgical instruments can be changed by adjusting the catheter hub within the catheter sheath, thereby closing the gap between the surgical instruments and the vascular access. Considering the reusability of the catheter sheath, the catheter hub needs to be reset after each use. Therefore, providing an improved technical solution to achieve catheter hub reset has become an urgent technical problem to be solved. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a catheter seat, a catheter sheath, and a catheter system that enable the repositioning of the catheter seat.

[0005] First, embodiments of the present invention provide a catheter seat, comprising: an adjusting member, a housing, and an elastic member;

[0006] The elastic element is used to apply the resetting force for repositioning the catheter seat;

[0007] The adjusting component includes a first structure for adjusting the state of the catheter seat, the state of which includes a reset state and a use state;

[0008] The housing includes a second structure associated with the reset state;

[0009] When the first structure and the second structure are combined, the limiting force that restricts the repositioning of the catheter seat disappears, so that the catheter seat is adjusted to the repositioned state under the action of the repositioning force.

[0010] Optionally, the housing may also include a third structure associated with the state of use;

[0011] When the first structure and the third structure are combined, a limiting force that restricts the repositioning of the catheter hub appears. The limiting force and the repositioning force are matched, and the catheter hub is in use.

[0012] Optionally, when the adjusting member rotates about the axis of the housing, the first structure is adapted to slide with the second or third structure.

[0013] Optionally, when the adjusting member moves along the axial direction of the housing, the first structure is adapted to elastically engage with the second or third structure respectively.

[0014] Optionally, the elastic element is adapted to be coupled to the adjusting element and the housing, respectively, to apply a resetting force for resetting the catheter seat.

[0015] Optionally, the first end of the elastic element is fixedly connected to the first guide channel of the housing through which the guide element passes via a first fixing member; and / or,

[0016] The second end of the elastic element is fixedly connected to the second guide channel through which the adjusting element and the guide element pass via the second fixing element.

[0017] Optionally, the housing may also include a fourth structure associated with the restraining force;

[0018] The adjustment mechanism also includes a fifth structure associated with the limiting force, which is adapted to cooperate with the fourth structure when the first and third structures cooperate to provide a limiting force that restricts the repositioning of the catheter seat.

[0019] Optionally, the fifth structure is also adapted to separate from the fourth structure when the first and second structures are engaged.

[0020] Optionally, when the adjusting member rotates about the axis of the housing, the fourth structure and the fifth structure are elastically engaged.

[0021] Optionally, the adjusting member can rotate unidirectionally about the axis of the housing.

[0022] This invention also provides a catheter sheath, comprising:

[0023] sheath;

[0024] The catheter hub described in any of the foregoing embodiments is adapted to be connected to a sheath.

[0025] This invention also provides a catheter system, comprising:

[0026] catheter;

[0027] The catheter sheath described in any of the foregoing embodiments is adapted for the passage of the catheter.

[0028] Using the above technical solution, the state of the catheter hub can include a reset state and a use state. The force on the catheter hub can include a reset force for resetting the catheter hub and a limiting force for restricting the resetting of the catheter hub. When the first structure is adjusted to cooperate with the second structure, the limiting force disappears. At this time, the catheter hub can be automatically adjusted to the reset state under the action of the reset force. That is, by adjusting the cooperation relationship between the first structure and the second structure, the relative magnitude of the reset force and the limiting force can be adjusted, thereby enabling the catheter hub to be reset so that the catheter hub is in the reset state.

[0029] Furthermore, the housing may also include a third structure. When the first structure and the third structure are engaged, a limiting force that restricts the repositioning of the catheter seat appears. The limiting force and the repositioning force work together on the catheter seat, and the catheter seat is in the use state. That is, by adjusting the engagement relationship between the first structure and the third structure, the relative magnitudes of the repositioning force and the limiting force can be adjusted, thereby allowing the catheter seat to leave the repositioning state and enter the use state.

[0030] Furthermore, the adjusting component rotates around the housing axis. When the first structure and the second structure are engaged, the first structure and the second structure are in sliding engagement. When the first structure and the third structure are engaged, the first structure and the third structure are in sliding engagement.

[0031] Furthermore, since the first structure can be elastically engaged with the second or third structure respectively, moving the adjusting member along the axial direction of the housing allows the first structure to switch between two engagement relationships: engaging with the second structure and engaging with the third structure. This enables the first structure to adjust the state of the guide tube seat.

[0032] Furthermore, the end of the elastic element coupled to the adjusting element maintains a constant relative position with the adjusting element, and the other end of the elastic element coupled to the housing maintains a constant relative position with the adjusting element. When the adjusting element moves relative to the housing, the elastic element can generate a corresponding deformation to provide a restoring force that causes the adjusting element to move in the opposite direction relative to the housing.

[0033] Furthermore, by adjusting the first structure to cooperate with the third structure, and then by cooperating with the fourth and fifth structures, a limiting force that is adapted to the resetting force can be provided to limit the resetting of the catheter seat, thereby avoiding relative displacement of the housing and the adjusting component under the action of the resetting force.

[0034] Furthermore, the first structure is adjusted to cooperate with the second structure. At this time, since the fourth structure is separated from the fifth structure, the limiting force used to restrict the repositioning of the catheter seat disappears, so that the catheter seat can be adjusted to the repositioning state under the action of the repositioning force. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this specification, the drawings used in the description of the embodiments of this specification or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 An exploded schematic diagram of a catheter seat according to an embodiment of the present invention is shown;

[0037] Figure 2A longitudinal cross-sectional schematic diagram of a catheter seat according to an embodiment of the present invention is shown;

[0038] Figure 3 A schematic diagram of the structure of a housing according to an embodiment of the present invention is shown;

[0039] Figure 4 A schematic diagram of the structure of an adjusting member according to an embodiment of the present invention is shown;

[0040] Figure 5 A top view of an adjusting member according to an embodiment of the present invention is shown. Detailed Implementation

[0041] A catheter sheath is a medical device used to establish vascular access. After the catheter sheath is inserted into a blood vessel, the guide device (such as a catheter, guidewire, or other surgical instrument used in vascular interventional procedures) can be inserted through the catheter sheath into the vascular access for subsequent targeted therapeutic procedures.

[0042] As an alternative example, the catheter sheath in the prior art may include a catheter seat and a sheath, wherein the sheath is adapted to provide an insertion channel for establishing vascular access, and the catheter seat is adapted to change the size of the insertion channel through which the insertion element passes. By closing the gap between the insertion element and the insertion channel, blood can be prevented from flowing out through the gap, thereby achieving hemostasis.

[0043] Considering the reusability of catheter sheaths, the catheter hub needs to be reset after use to ensure it is in its original, pre-use state. Therefore, providing an improved technical solution to achieve this repositioning of the catheter hub has become a pressing technical problem.

[0044] To address the aforementioned technical problems, embodiments of the present invention provide a catheter seat having a reset state and a use state. By adjusting the relative magnitude between the reset force for resetting the catheter seat and the limiting force restricting the resetting of the catheter seat, a reset operation can be performed on the catheter seat, thereby bringing the catheter seat to the reset state.

[0045] To enable those skilled in the art to better understand and implement the embodiments of the present invention, the following describes the concept, scheme, principle, and advantages of the embodiments of the present invention in detail with reference to the accompanying drawings and through specific application examples.

[0046] Reference Figure 1 , Figure 1 This is an exploded view of a catheter seat provided in an embodiment of the present invention. In some embodiments of the present invention, the catheter seat M may include an adjusting member 1, a housing 2, and an elastic member 3, wherein:

[0047] Adjusting component 1 may include a first structure 11, which is used to adjust the state of the catheter seat M. The state of the catheter seat M may include a reset state and a use state.

[0048] The housing 2 may include a second structure 21 associated with the reset state;

[0049] The elastic element 3 is used to apply the resetting force for resetting the catheter seat M;

[0050] When the first structure 11 and the second structure 21 are engaged, the limiting force that restricts the repositioning of the catheter seat M disappears, so that the catheter seat M is adjusted to the repositioned state under the action of the repositioning force.

[0051] Using the above-mentioned catheter seat, the state of the catheter seat can include a reset state and a use state. The force on the catheter seat can include a reset force for resetting the catheter seat and a limiting force for restricting the resetting of the catheter seat. When the first structure is adjusted to cooperate with the second structure, since the limiting force disappears, the catheter seat can be automatically adjusted to the reset state under the action of the reset force. That is, by adjusting the cooperation relationship between the first structure and the second structure, the relative magnitude of the reset force and the limiting force can be adjusted, thereby performing a reset operation on the catheter seat so that the catheter seat is in the reset state.

[0052] As an optional implementation, continue to refer to Figure 1 The housing 2 may also include a third structure 22 associated with the use state; wherein, when the first structure 11 cooperates with the third structure 22, a limiting force that restricts the repositioning of the catheter seat M occurs, so that the catheter seat M is adjusted to the use state.

[0053] Specifically, when the first structure and the third structure are engaged, a limiting force that restricts the repositioning of the catheter seat appears. The limiting force and the repositioning force work together on the catheter seat, and the catheter seat is in the use state. That is, by adjusting the engagement relationship between the first structure and the third structure, the relative magnitudes of the repositioning force and the limiting force can be adjusted, thereby allowing the catheter seat to leave the repositioning state and enter the use state.

[0054] In practice, the adjusting component can be rotatably fitted with the housing. For example, the adjusting component can be rotatably fitted with the housing axis.

[0055] In practice, the adjusting component can slide with the housing. For example, the adjusting component can slide with the housing while rotating about the housing axis; or, for example, the adjusting component can slide with the housing while moving along the housing axis.

[0056] As an optional implementation, when the adjusting member rotates, the first structure can slide into the second or third structure. Specifically, when the adjusting member rotates about the housing axis, the first structure slides into the second structure when it engages with the second structure, and the first structure slides into the third structure when it engages with the third structure.

[0057] As an optional implementation, the first, second, and third structures can be made of materials with a sliding friction coefficient between 0.0001 and 0.3. For example, the first, second, or third structure can be one or more of materials such as polytetrafluoroethylene, polyethylene, or polymer coatings.

[0058] In practical implementation, the specific structures of the first, second, and third structures can be determined according to the specific circumstances. As an optional implementation method, continue to refer to... Figure 1 The first structure 11 can be a convex ring structure, and the second structure 21 and the third structure 22 can be ring groove structures adapted to the convex ring structure.

[0059] In practical applications, if the first structure is embedded in the second structure, the first structure can slide within the second structure when the adjusting member is rotated; if the first structure is embedded in the third structure, the first structure can slide within the third structure when the adjusting member is rotated.

[0060] It should be noted that, Figure 1 The specific structures of the first, second, and third structures shown are merely illustrative examples, used only to illustrate the specific ways in which the first and second structures, as well as the first and third structures, can achieve a sliding fit. They should not be construed as limitations on the present invention, and the first, second, and third structures can also be other structures.

[0061] For example, the first structure can also be a convex dot structure or a convex strip structure, and the second and third structures can both be matching annular groove structures; for another example, the first structure can also be an annular groove structure, the second structure can be a matching convex dot or convex strip structure, and the third structure can be a matching convex ring structure.

[0062] In other embodiments of the present invention, the first structure may also be disposed on the housing, and correspondingly, the second and third structures may be disposed on the adjusting member. By moving the adjusting member, the second and third structures can be engaged with the first structure respectively, thereby adjusting the state of the guide tube seat.

[0063] In practice, the specific structure that cooperates with the first structure when the catheter seat is in different states can be determined according to the specific circumstances.

[0064] As an alternative example, for a first structure that is unique in number, when the catheter hub is in the reset state, the first structure may only mate with the second structure; when the catheter hub is in the use state, the first structure may only mate with the third structure.

[0065] As another alternative example, for a first structure that is not unique in number, when the catheter hub is in the reset state, the first structure may only cooperate with the second structure; when the catheter hub is in the use state, the third structure may cooperate with one first structure while the second structure may also cooperate with another first structure.

[0066] In practical implementation, when subjected to a force along the axial direction of the housing, the adjusting member can move along the axial direction of the housing. Specifically, when the first structure is engaged with the second or third structure, if subjected to a force along the axial direction of the housing, the first structure can separate from the second or third structure.

[0067] As an optional implementation, the first structure can be elastically engaged with the second and third structures respectively along the axial direction of the shell.

[0068] In practical applications, since the first structure and the second structure are elastically engaged along the axial direction of the shell, if the first structure and the second structure are engaged and subjected to a force along the axial direction of the shell, the first structure can be separated from the second structure; since the first structure and the third structure are elastically engaged along the axial direction of the shell, if the first structure and the third structure are engaged and subjected to a force along the axial direction of the shell, the first structure can be separated from the third structure.

[0069] As an optional implementation, continue to refer to Figure 1 The second structure 21 and the third structure 22 can be arranged sequentially along the axial direction of the housing 2. In actual use, moving the adjusting member along the axial direction of the housing allows the first structure to switch between two mating relationships: mating with the second structure and mating with the third structure, thereby enabling the first structure to adjust the state of the guide tube seat.

[0070] In practical implementation, the elastic element can be coupled to both the adjusting element and the housing. Coupling can include direct connections (e.g., snap-fit, welding, bonding, injection molding, etc.) and connections achieved through connectors (e.g., riveting, screws, etc.). In practical applications, the end of the elastic element coupled to the adjusting element maintains a constant relative position with respect to the adjusting element, and the other end of the elastic element coupled to the housing also maintains a constant relative position with respect to the adjusting element. When the adjusting element moves relative to the housing, the elastic element can generate a corresponding deformation to provide a restoring force that causes the adjusting element to move in the opposite direction relative to the housing.

[0071] As an optional implementation, the first end of the elastic member can be fixedly connected to the first inlet channel of the housing through which the inlet member passes via the first fixing member; and / or, the second end of the elastic member can be fixedly connected to the second inlet channel of the adjusting member through the second fixing member.

[0072] As a specific example, in conjunction with reference Figure 2 , Figure 3 and Figure 4 , Figure 2 A longitudinal cross-sectional schematic diagram of a catheter seat according to an embodiment of the present invention is shown. Figure 3 A schematic diagram of the structure of a housing according to an embodiment of the present invention is shown. Figure 4 A schematic diagram of an adjusting member according to an embodiment of the present invention is shown, wherein:

[0073] The elastic element 3 is a tubular structure. The first end 31 of the elastic element 3 is located between the inner wall of the first inlet channel T1 and the first fixing element 4. The first end 31 of the elastic element 3 is riveted and fixed to the inner wall of the first inlet channel T1 by the first fixing element 4. The second end 32 of the elastic element 3 is located between the inner wall of the second inlet channel T2 and the second fixing element 5. The second end 32 of the elastic element 3 is riveted and fixed to the inner wall of the second inlet channel T2 by the second fixing element 5.

[0074] In practical applications, the first end of the elastic element is connected to the first inlet channel, and the relative position of the first end of the elastic element to the housing remains unchanged. The second end of the elastic element is connected to the second inlet channel, and the relative position of the second end of the elastic element to the adjusting element remains unchanged. When the adjusting element rotates about the axis of the housing, the adjusting element drives the second end of the elastic element to rotate. The second end rotates relative to the first end, and the elastic element is twisted to produce deformation, thereby providing a restoring force to make the adjusting element rotate in the opposite direction about the axis of the housing.

[0075] As an optional implementation, refer to Figure 1 , Figure 2 and Figure 3 The first end 31 of the elastic member 3 can be frustum-shaped, and the shape of the inner wall of the first inlet channel T1 at the position where it is connected to the first end 31 is adapted to the shape of the first end 31; the second end 32 of the elastic member 3 can also be frustum-shaped, and the shape of the inner wall of the second inlet channel T2 at the position where it is connected to the second end 32 is adapted to the shape of the second end 32.

[0076] In practical applications, since both the first and second ends of the elastic element are truncated cone-shaped, the first and second ends of the elastic element can be riveted and fixed to the inner walls of the first and second inlet channels respectively by applying force along the axial direction of the guide seat using the first and second fixing members, thereby reducing the difficulty of fixing.

[0077] In practical implementation, the elastic element is a tubular structure made of an elastic material that can deform under force. Specifically, the elastic material can be one or more of silicone, fluorinated polymers (such as polytetrafluoroethylene), biodegradable polymers, and synthetic vascular materials (such as polypropylene or polyethylene). In practical applications, the specific elastic material used for the elastic element can be selected according to the specific circumstances.

[0078] In practical implementation, the structure in the guide tube seat used to provide the restraining force can be determined according to the specific circumstances. As an optional implementation method, refer to... Figure 1 , Figure 3 and Figure 4 The housing 2 may further include a fourth structure 23 associated with a limiting force, and the adjusting member 1 may further include a fifth structure 12 associated with a limiting force, wherein the fourth structure 23, when cooperating with the fifth structure 12, can provide a limiting force to restrict the repositioning of the catheter seat M. Specifically, when the first structure 11 cooperates with the third structure 22, the fourth structure 23 can cooperate with the fifth structure 12 to provide a limiting force to restrict the repositioning of the catheter seat M.

[0079] In practical applications, the first structure is adjusted to cooperate with the third structure. At this time, the fourth structure cooperates with the fifth structure to provide a limiting force that is adapted to the reset force and is used to limit the reset of the catheter seat. This can prevent the relative displacement of the shell and the adjustment component under the action of the reset force.

[0080] As an optional implementation, refer to Figure 2 , Figure 3 and Figure 4 When the first structure 11 and the second structure 21 are engaged, the fourth structure 23 can be separated from the fifth structure 12 to eliminate the restrictive force limiting the repositioning of the catheter seat. In practical applications, the first structure is adjusted to engage with the second structure. At this time, because the fourth structure and the fifth structure are separated, the restrictive force used to limit the repositioning of the catheter seat disappears, allowing the catheter seat to be adjusted to the repositioned state under the action of the repositioning force.

[0081] In practice, the specific structures of the fourth and fifth structures can be determined according to the specific circumstances. For example, when the adjusting member rotates about the axis of the housing, the fourth structure can be elastically engaged with the fifth structure; or, for another example, when the adjusting member rotates about the axis of the housing, the fourth structure can mesh with the fifth structure.

[0082] As an optional implementation, refer to Figure 3 and Figure 4The fourth structure 23 can be a spline structure, wherein the spline structure is distributed circumferentially along the first inlet channel T1 with the axis as the axis, and the multiple keyways 23e of the spline structure extend along the axial direction of the first inlet channel T1; the fifth structure 12 can be an elastic structure, wherein the elastic structure is distributed circumferentially along the adjusting member 1 with the second inlet channel T2 as the axis, and the multiple spring pieces 12e of the elastic structure extend along the axial direction of the second inlet channel T2 and are elastically engaged with each keyway 23e.

[0083] When the fourth structure and the fifth structure are combined, multiple elastic elements of the elastic structure are located in each keyway. Rotating the adjusting element by a certain angle can cause the elastic elements to deform. The deformation of the elastic elements is used to apply the reset force for the adjusting element to reset. At this time, due to the elastic engagement between the elastic element and the keyway, there is a limiting force between the elastic element and the keyway that restricts the reset of the adjusting element, so as to keep the adjusting element and the housing relatively stationary.

[0084] In practice, the adjusting component can rotate unidirectionally about the housing axis. For example, the adjusting component can rotate clockwise and lock counterclockwise about the housing axis; or, the adjusting component can rotate counterclockwise and lock clockwise about the housing axis.

[0085] As an optional implementation, refer to Figure 5 , Figure 5 A top view of an adjusting member according to an embodiment of the present invention is shown, wherein a plurality of elastic pieces 12e are evenly distributed along the circumference of the adjusting member 1, and each piece 12e bends toward the circumferential direction F1 as it extends radially R away from the axis of the adjusting member 1, wherein the circumferential direction F2 is opposite to the circumferential direction F1 as shown in the figure.

[0086] In practical applications, since multiple springs evenly distributed along the circumference of the adjusting component bend towards the circumferential direction F1 as they extend radially away from the axis of the adjusting component, the interaction force between the elastic structure and the spline structure when they rotate relative to each other in the circumferential direction F1 is much greater than the interaction force between the elastic structure and the spline structure when they rotate relative to each other in the circumferential direction F2. As a result, the adjusting component can only rotate relative to the housing in the circumferential direction F2, and cannot rotate relative to the housing in the circumferential direction F1.

[0087] It should be noted that the fourth structure being a spline structure and the fifth structure being an elastic structure are merely illustrative examples, used only to illustrate the specific ways in which the fourth and fifth structures can achieve an elastic snap-fit ​​connection. This should not be construed as a limitation of the invention, as there can be other specific ways to achieve an elastic snap-fit ​​connection between the fourth and fifth structures. For example, the fourth structure could be an elastic structure, and the fifth structure a spline structure.

[0088] In practice, the specific location of the fourth structure on the housing can be determined according to the specific circumstances. For example, the fourth structure can be located on the outer wall of the housing, and the fifth structure can be located on the adjusting member at the corresponding position; or, the fourth structure can be located on the inner wall of the first inlet channel of the housing, and the fifth structure can be located on the adjusting member at the corresponding position.

[0089] As an optional implementation, refer to Figure 2 , Figure 3 and Figure 4 The adjusting member 1 may include a first part 13, a second part 14, and a third part 15. The first part 13, the second part 14, and the third part 15 are coaxially arranged tubular structures, wherein the second part 14 is located inside the first part 13 and is connected to the first part 13 through the third part 15. The fourth structure 23 may be disposed on the inner wall of the first inlet channel T1 of the housing 2, and the fifth structure 12 may be disposed on the outer wall of the second part 14. When the first structure 11 and the third structure 22 are engaged, the portion of the housing 2 provided with the fourth structure 23 is located between the first part 13 and the second part 14, so that the fourth structure 23 can engage with the fifth structure 12.

[0090] In practical implementation, the outer wall of the adjusting component is provided with a structure that facilitates rotation of the adjusting component. For example, the outer wall of the adjusting component can be provided with a concave-convex structure; or, the outer wall of the adjusting component can be provided with a coating with a high coefficient of friction.

[0091] As an optional implementation, refer to Figure 2 and Figure 4 The outer wall of the third part 15 may be provided with a concave-convex structure 151, wherein multiple protrusions 151e of the concave-convex structure 151 are evenly distributed circumferentially along the outer wall of the third part 15, and each protrusion 151e extends along the axial direction of the adjusting member 1. The extension of each protrusion along the axial direction of the adjusting member can increase the radial force-bearing surface (i.e., rotational torque) of the third part, thereby facilitating the operator to apply force to the adjusting member circumferentially.

[0092] As an optional implementation, refer to Figure 1 and Figure 2 The housing 2 of the catheter seat M may also include an exhaust channel T3, which is connected to the first inlet channel T1. In practical applications, by introducing liquid into the exhaust channel before surgery, the gap between the inlet and the first inlet channel can be filled with liquid, thereby expelling the gas present in the gap between the inlet and the first inlet channel.

[0093] To enable those skilled in the art to more clearly understand and implement the embodiments of the present invention, the structure and working principle of the catheter seat are described in detail below with reference to the accompanying drawings and specific examples.

[0094] In a specific example of the present invention, in conjunction with reference to... Figures 1 to 5 The catheter seat M may include an adjusting member 1, a housing 2, and an elastic member 3, wherein:

[0095] The adjusting member 1 includes a first part 13, a second part 14, and a third part 15 arranged coaxially. The second part 14 is located inside the first part 13 and is connected to the first part 13 through the third part 15. The outer wall of the first part 13 is provided with a first structure 11 made of polytetrafluoroethylene, which is a convex ring structure. The outer wall of the second part 14 is provided with a fifth structure 12, which is an elastic structure including a plurality of spring pieces 12e bent in the circumferential direction F1. The outer wall of the third part 15 is provided with a concave-convex structure 151, which includes a plurality of convex ridges 151e extending along the axial direction of the adjusting member 1. The second part 14 forms a second inlet channel T2.

[0096] The housing 2 has a first inlet channel T1 and an exhaust channel T3 that are interconnected; the outer wall of the housing 2 is provided with a second structure 21 and a third structure 22 made of polytetrafluoroethylene, both of which are annular groove structures that can be adapted to the first structure 11, and the second structure 21 and the third structure 22 are distributed along the axial direction of the first inlet channel T1; the inner wall of the first inlet channel T1 is provided with a fourth structure 23, which is a spline structure adapted to the elastic structure;

[0097] The second structure 21 and the third structure 22 can slide along the axis of the first inlet channel T1 and can be elastically engaged with the first structure 11 respectively. When rotating about the axis of the first inlet channel T1, they can be slidably engaged with the first structure 11 respectively. The fourth structure 23 can move along the axis of the first inlet channel T1 and can be slidably engaged with the fifth structure 12. When the fourth structure 23 rotates about the axis of the first inlet channel T1 along the circumferential direction F2, the fourth structure 23 can be elastically engaged with the fifth structure 12. When rotating along the circumferential direction F1, the fourth structure 23 can be locked with the fifth structure 12. The circumferential directions F1 and F2 are opposite.

[0098] The elastic element 3 is a tubular structure made of silicone material. The first end 31 of the elastic element 3 is riveted and fixed to the inner wall of the first inlet channel T1 by the first fixing member 4, and is sealed between the first fixing member 4 and the inner wall of the first inlet channel T1. The second end 32 of the elastic element 3 is riveted and fixed to the inner wall of the second inlet channel T2 by the second fixing member 5, and is sealed between the second fixing member 5 and the inner wall of the second inlet channel T2.

[0099] In practical applications, the inlet can pass through the guide tube seat in sequence via the second inlet channel, the elastic element, and the first inlet channel.

[0100] When needed, the adjusting member is moved along the axis of the first inlet channel, so that the first structure of the adjusting member engages with the third structure of the housing, and the fifth structure of the adjusting member engages with the fourth structure of the housing, thus putting the catheter seat into use. The protruding edge of the adjusting member is rotated circumferentially by F2. The adjusting member drives the second end of the elastic element to rotate relative to the first end of the elastic element, causing the elastic element to be twisted until the gap between the inner wall of the elastic element and the inlet tube is eliminated. At this point, rotation of the adjusting member is stopped. During the rotation of the adjusting member, the deformation formed by the twisting of the elastic element provides a restoring force for the adjusting member to rotate circumferentially by F1. However, at this time, the elastic structure of the spring piece bending circumferentially by F1 in the fifth structure locks the fourth and fifth structures in circumferential F1. That is, the interaction force between the fourth and fifth structures provides a limiting force to restrict the reset of the catheter seat, so that the adjusting member will not rotate under the action of the restoring force and remains relatively stationary with respect to the housing.

[0101] When reset is required, the adjusting member is moved along the axis of the first inlet channel, so that the first structure of the adjusting member engages with the second structure of the housing, and the fifth structure of the adjusting member separates from the second structure of the housing. Due to the sliding engagement between the first and second structures, the frictional force between the first and second structures is less than the deformation caused by the kinking of the elastic element in the use state of the catheter seat. The reset force provided to the adjusting member for circumferential rotation F1 is less than the reset force provided by the elastic element and the reset force provided by the user. Under the action of the reset force provided by the elastic element and the reset force provided by the user, the adjusting member returns to the reset state.

[0102] It is understood that the above embodiments provide multiple implementation schemes, and these implementation schemes can be combined and cross-referenced with each other without conflict, thereby extending to multiple possible implementation schemes. These can all be considered as the implementation schemes disclosed and made public in this application.

[0103] This invention also provides a catheter sheath, which may include: a sheath and a catheter base, wherein,

[0104] The catheter hub is adapted to connect with the sheath.

[0105] Using the above technical solution, when the catheter sheath is used, the sheath is inserted into the blood vessel, and the guide piece enters the blood vessel in sequence through the catheter seat and the sheath. The catheter seat in the catheter sheath can close the gap between the guide piece and the catheter sheath so that blood will not flow out through the gap, thereby achieving the function of hemostasis.

[0106] In practice, the specific method of connecting the catheter hub and sheath can be determined according to the specific circumstances. As an example, the connection method used for the catheter hub and sheath may include one or more of the following: threaded connection, plug-in connection, welding, integral molding, etc.

[0107] In specific implementation, the catheter seat can be any of the catheter seats in the foregoing embodiments. For specific implementation methods, please refer to the foregoing embodiments, which will not be repeated here.

[0108] This invention also provides a catheter system, which may include a catheter and a catheter sheath, the catheter sheath being adapted for the passage of the catheter.

[0109] In practice, the catheter sheath described above can be any of the catheter sheaths in the foregoing embodiments.

[0110] It is understood that the above embodiments provide multiple implementation schemes, and these implementation schemes can be combined and cross-referenced with each other without conflict, thereby extending to multiple possible implementation schemes. These can all be considered as the implementation schemes disclosed and made public in this application.

[0111] It should be noted that the terms "example" or "implementation" used in this specification refer to a specific feature, structure, or characteristic that can be included in at least one implementation of the embodiments of the present invention. Furthermore, in the description of this specification, terms such as "first," "second," "third," "fourth," and "fifth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with terms such as "first," "second," etc., may explicitly or implicitly include one or more of that feature. Moreover, terms such as "first," "second," "third," "fourth," and "fifth" are used to distinguish similar objects and are not necessarily used to describe a specific order or indicate importance. It is understood that such terms can be interchanged where appropriate so that the embodiments of the present invention described herein can be implemented in orders other than those illustrated or described herein.

[0112] While the embodiments of the present invention have been disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of this specification should be determined by the scope defined in the claims.

Claims

1. A catheter seat, characterized in that, include: Adjustment components, housing, and elastic components; The elastic element is used to apply the resetting force for repositioning the catheter seat; The adjusting component includes a first structure, which is used to adjust the state of the catheter seat. The state of the catheter seat includes a reset state and a use state. The first structure is a convex ring structure. The housing includes a second structure associated with a reset state, a third structure associated with a use state, and a fourth structure associated with a limiting force. The second and third structures are annular groove structures adapted to the convex ring structure. The adjustment mechanism also includes a fifth structure associated with the limiting force, which is adapted to cooperate with the fourth structure when the first and third structures cooperate to provide a limiting force that restricts the repositioning of the catheter seat; The fourth structure is a spline structure. The spline structure is distributed around the axis of the first inlet channel and along the circumference of the shell. The multiple keyways of the spline structure extend along the axial direction of the first inlet channel. The fifth structure is an elastic structure. The elastic structure is distributed around the axis of the second inlet channel and along the circumference of the adjusting member. Multiple elastic pieces of the elastic structure extend along the axis of the second inlet channel and are elastically engaged with each keyway. When the fourth structure and the fifth structure are engaged, they keep the adjusting member and the housing relatively stationary. The fifth structure is also adapted to separate from the fourth structure when the first and second structures are engaged, so that the limiting force restricting the repositioning of the catheter seat disappears, and the catheter seat is adjusted to the repositioned state under the action of the repositioning force. The process of adjusting the catheter seat to a reset state under the action of a reset force includes: when reset is required, the adjusting member is moved along the axial direction of the first inlet channel. Due to the sliding fit between the first structure and the second structure, the friction between the first structure and the second structure is less than that of the catheter seat in use. The deformation formed by the kinking of the elastic element provides the adjusting member with a reset force to rotate in the circumferential direction F1, and the adjusting member returns to the reset state. When the first structure and the second structure are combined, the limiting force that restricts the repositioning of the catheter seat disappears, so that the catheter seat is adjusted to the repositioned state under the action of the repositioning force.

2. The catheter seat according to claim 1, characterized in that, When the first structure and the third structure are combined, a limiting force that restricts the repositioning of the catheter hub appears. The limiting force and the repositioning force are matched, and the catheter hub is in use.

3. The catheter seat according to claim 1, characterized in that, When the adjusting component rotates about the axis of the housing, the first structure is adapted to slide with the second or third structure.

4. The catheter seat according to claim 1, characterized in that, When the adjusting member moves along the axial direction of the housing, the first structure is adapted to elastically engage with the second or third structure respectively.

5. The catheter seat according to claim 1, characterized in that, The elastic element is adapted to be coupled to the adjusting element and the housing respectively to apply a resetting force for resetting the catheter seat.

6. The catheter seat according to claim 1, characterized in that, The first end of the elastic element is fixedly connected to the first guide channel of the housing through which the guide element passes via the first fixing element; and / or, The second end of the elastic element is fixedly connected to the second guide channel through which the adjusting element and the guide element pass via the second fixing element.

7. The catheter seat according to claim 1, characterized in that, When the adjusting component rotates about the axis of the housing, the fourth structure and the fifth structure are elastically engaged.

8. The catheter seat according to claim 1, characterized in that, The adjusting component rotates unidirectionally about the axis of the housing.

9. A catheter sheath, characterized in that, include: sheath; The catheter hub as described in any one of claims 1 to 8 is adapted to be connected to a sheath.

10. A catheter system, characterized in that, include: catheter; The catheter sheath as described in claim 9 is adapted for the passage of a catheter.

Images