Knob type hemostasis valve

Abstract

The utility model provides a knob type hemostasis valve. The knob type hemostasis valve comprises a sealing shell, a screwing piece, a sealing piece and a gasket. The screwing piece is connected with the near end of the sealing shell, and a penetrating space suitable for penetrating an interventional instrument is formed between the screwing piece and the sealing shell; the screwing piece moves relative to the sealing shell under the action of external force so as to reduce or enlarge the penetrating space; the sealing piece is arranged in the penetrating space, and a penetrating hole suitable for penetrating an interventional instrument is formed in the sealing piece; the sealing piece is extruded by the screwing piece to generate elastic deformation so as to inwards extrude the penetrating hole; wherein the screwing piece is configured to reduce the penetrating space under the action of external force so as to extrude the sealing piece until the hole wall of the penetrating hole is tightly attached to the interventional instrument, and in order to avoid the situation that the screwing piece rotates to drive the first sealing piece to twist, and then the sealing performance between the first sealing piece and the interventional instrument is affected, a gasket is arranged between the screwing piece and the first sealing piece; therefore, the influence on the first sealing piece when the screwing piece rotates is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a knob-type hemostatic valve. Background Art

[0002] In interventional surgery, the catheter sheath plays an important role in establishing a connection channel between the patient's vascular lumen and the outside world. During the operation, the catheter sheath is introduced into the blood vessel through vascular puncture, allowing the catheter and other instruments or drugs to reach the lesion area through the human artery and vein, thereby achieving the purpose of diagnosing and treating the disease.

[0003] The catheter sheath not only provides a channel for the catheter to enter the human body, but also creates an outlet for blood to flow out or air to enter the body. In order to prevent the outflow of blood or the entry of air, a sealing valve with sealing properties needs to be provided in the catheter sheath; the sealing valve needs to be able to effectively prevent blood from flowing out or air from entering, while also allowing the catheter or other instruments to pass smoothly and maintaining a good operating feel.

[0004] Currently, more and more surgeries require the use of large-sized vascular sheaths, especially transcatheter valve replacement surgeries. However, in large-sized catheter sheaths, existing structures can rarely effectively meet the above requirements, and the actual use effects in surgery are not ideal. Utility Model Content

[0005] Therefore, the technical problem to be solved by the utility model is that the sealing valve in the prior art cannot effectively prevent blood from flowing out or air from entering, while also allowing a catheter or other device to pass smoothly and maintaining good operating feel requirements.

[0006] To this end, the utility model provides a knob-type hemostatic valve, comprising:

[0007] A sealing housing adapted to be connected to the proximal end of the catheter sheath;

[0008] A screw-on component connected to the proximal end of the sealing housing, wherein a penetration space suitable for penetration of interventional instruments is formed between the screw-on component and the sealing housing; the screw-on component is configured to move relative to the sealing housing under the action of an external force to reduce or increase the penetration space;

[0009] A sealing member is arranged inside the penetration space, and a penetration hole suitable for penetrating the interventional instrument is provided on the sealing member; the sealing member is configured to be elastically deformed by being squeezed by the tightening member so as to squeeze the penetration hole inwardly;

[0010] Wherein, the tightening member is configured to reduce the penetration space under the action of external force, so as to squeeze the sealing member until the wall of the penetration hole is in close contact with the interventional instrument.

[0011] Optionally, the tightening member is connected to the proximal end of the sealing housing through threaded cooperation, and the tightening member is configured to rotate relative to the sealing housing under the action of an external force to reduce or increase the penetration space.

[0012] Optionally, a gasket is further included, on which a through hole is provided, and the gasket is arranged between the sealing member and the tightening member to prevent the sealing member from being twisted by the tightening member.

[0013] Optionally, the sealing member includes a first sealing member and a second sealing member, the first sealing member and the second sealing member abut against each other, and the gasket is arranged between the first sealing member and the tightening member.

[0014] Optionally, the hole formed on the first seal is a circular through hole; a plurality of folding portions are provided in the middle of the second seal, and all the folding portions are configured to bend toward one side of the second seal when pushed by the interventional instrument to form a hole in the second seal.

[0015] Optionally, the middle of the second sealing member is cut along a cross to form four folded portions.

[0016] Optionally, the proximal end of the first sealing member is recessed inward to form an annular placement cavity, and one side of the distal end of the gasket is protruding to be placed in the placement cavity.

[0017] Optionally, one side of the proximal end of the gasket is recessed inward to form an annular placement cavity, and the tightening member is provided with an annular protrusion on one side close to the gasket that is suitable for being placed in the annular placement cavity of the gasket.

[0018] Optionally, the contact surface between the first sealing member and the gasket, and the contact surface between the gasket and the tightening member are both smooth surfaces.

[0019] Optionally, an annular limiting protrusion is provided at the distal end of the external thread on the circumferential side of the sealing shell; a limiting groove is provided at the distal end of the internal thread on the inner side of the tightening member, and the tightening member is configured so that when it moves relative to the sealing shell under the action of external force, the annular limiting protrusion moves in the limiting groove to prevent the tightening member from detaching from the sealing shell.

[0020] Optionally, the sealing housing and the outer circumference of the screw-on component are both provided with protruding prisms.

[0021] Optionally, an indicator, an enlarged mark and a reduced mark are provided on the outer circumference of the tightening member.

[0022] The knob-type hemostatic valve provided by the utility model has the following advantages:

[0023] 1. The utility model provides a knob-type hemostatic valve, comprising a sealing shell, a tightening member, a sealing member and a gasket, wherein the sealing shell is suitable for being connected to the proximal end of a catheter sheath; the tightening member is connected to the proximal end of the sealing shell, and a penetration space suitable for penetrating an interventional instrument is formed between the tightening member and the sealing shell; the tightening member is configured to move relative to the sealing shell under the action of an external force to reduce or increase the penetration space; the sealing member is arranged inside the penetration space, and a penetration hole suitable for penetrating an interventional instrument is provided on the sealing member; the sealing member is configured to be elastically deformed by being squeezed by the tightening member to squeeze the penetration hole inwardly; the gasket is provided with a through hole, and the gasket is arranged between the sealing member and the tightening member to prevent the sealing member from being twisted by the tightening member; wherein the tightening member is configured to reduce the penetration space under the action of an external force to squeeze the sealing member until the wall of the penetration hole is in close contact with the interventional instrument.

[0024] The knob-type hemostatic valve of this structure, after the interventional instrument is inserted into the inside of the penetration hole in the seal, the tightening member is rotated to move the tightening member toward the distal end of the sealing shell to reduce the penetration space between the tightening member and the sealing shell, that is, the seal is squeezed to elastically deform by moving the tightening member toward the distal end of the sealing shell, and the outer peripheral side of the seal abuts against the inner wall of the sealing shell on the peripheral side of the penetration space. When the seal is elastically deformed, the seal squeezes the penetration hole inward until the wall of the penetration hole abuts closely against the peripheral side of the interventional instrument, so as to effectively prevent blood from flowing out or air from entering. At the same time, when the interventional instrument is penetrated, the tightening member can be rotated in the opposite direction, so that the tightening member reduces the squeezing of the seal, and the diameter of the penetration hole becomes larger. The tightening member is rotated again after the interventional instrument is penetrated into the penetration hole on the seal, so that the interventional instrument can pass smoothly and maintain a good operating feel. In order to prevent the first seal from twisting when the tightening member rotates, thereby affecting the sealing between the first seal and the interventional instrument, a gasket is arranged between the tightening member and the first seal, and the contact surface between the first seal and the gasket, and the contact surface between the gasket and the tightening member are both smooth surfaces, so as to reduce the impact of the tightening member on the first seal when it rotates.

[0025] 2. The utility model provides a knob-type hemostatic valve, wherein the sealing member comprises a first sealing member and a second sealing member, wherein the first sealing member and the second sealing member abut against each other, and the gasket is arranged between the first sealing member and the tightening member. The hole formed on the first sealing member is a circular through hole; the second sealing member is provided with a plurality of folding portions in the middle, and all the folding portions are configured to be pushed by an interventional instrument to bend toward one side of the second sealing member to form a hole formed in the second sealing member.

[0026] In the knob-type hemostatic valve of this structure, the hole formed on the first sealing member is a circular through hole. The circular through hole can facilitate the insertion of interventional instruments. The four folded parts formed on the second sealing member can improve the wrapping of interventional instruments.

[0027] 3. The utility model provides a knob-type hemostatic valve, wherein an annular limiting protrusion is provided at the distal end of the external thread on the circumferential side of the sealing shell; a limiting groove is provided at the distal end of the internal thread on the inner side of the tightening member, and the tightening member is configured such that when it moves relative to the sealing shell under the action of an external force, the annular limiting protrusion moves in the limiting groove to prevent the tightening member from being separated from the sealing shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is a schematic structural view of a knob-type hemostatic valve provided in an embodiment of the utility model;

[0030] Figure 2 An exploded view of a knob-type hemostatic valve provided in an embodiment of the utility model;

[0031] Figure 3 This is a schematic diagram of the cooperation between the sealing housing and the tightening member in the knob-type hemostatic valve provided in the embodiment of the utility model;

[0032] Figure 4 This is a schematic structural view of a gasket, a first sealing member and a second sealing member in a knob-type hemostatic valve provided in an embodiment of the utility model;

[0033] Description of reference numerals:

[0034] 1-sealing housing; 11-annular limiting protrusion;

[0035] 2-tightening piece; 21-limiting groove; 22-indicator; 23-enlargement mark; 24-reduction mark;

[0036] 3- Gasket;

[0037] 4- first seal;

[0038] 5- Second seal. DETAILED DESCRIPTION

[0039] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0041] For the convenience of explanation, in this embodiment, the end close to the operator is set as the proximal end, and the end far from the operator is set as the distal end.

[0042] Example

[0043] This embodiment provides a knob-type hemostatic valve, which is used to be installed at the proximal end of the catheter sheath to prevent blood from flowing out or air from entering, while also allowing the catheter or other instruments to pass smoothly and maintaining a good operating feel.

[0044] In this embodiment, if Figure 1 and Figure 2 As shown, the knob-type hemostatic valve comprises a sealing housing 1, a tightening member 2, a gasket 3 and a sealing member. The sealing housing 1 is fixedly connected to the proximal end of the catheter sheath, and a through cavity is provided inside the sealing housing 1. After the sealing housing 1 is fixed to the proximal end of the catheter sheath, the through cavity inside the sealing housing 1 is connected to the catheter sheath.

[0045] In this embodiment, the tightening member 2 is connected to the proximal end of the sealing shell 1, and a through cavity is also provided inside the tightening member 2. After the tightening member 2 is connected to the proximal end of the sealing shell 1, a penetration space suitable for inserting interventional instruments is formed between the tightening member 2 and the sealing shell 1. The tightening member 2 is configured to move relative to the sealing shell 1 under the action of external force to reduce or increase the penetration space.

[0046] Specifically, Figure 2 and Figure 3As shown, the side wall of the through cavity of the screw-in piece 2 is provided with an internal thread, and the outer surface of the sealing housing 1 is provided with an external thread. During installation, the internal thread on the screw-in piece 2 is matched with the external thread on the outer surface of the sealing housing 1 to achieve the connection between the screw-in piece 2 and the sealing housing 1. It can be understood that since the screw-in piece 2 is connected to the proximal end of the sealing housing 1 through threaded matching, when the user rotates the screw-in piece 2, the screw-in piece 2 can move relative to the sealing housing 1 along its axial direction, thereby reducing or increasing the penetration space.

[0047] In this embodiment, the gasket 3 and the seal are placed in the penetration space between the tightening piece 2 and the sealing shell 1, and the gasket 3 is arranged between the seal and the tightening piece 2, the distal end of the seal abuts against the sealing shell 1, and the seal is provided with a penetration hole suitable for penetrating the interventional instrument. The gasket 3 is also provided with a through hole. When the interventional instrument is penetrated, the distal end of the interventional instrument successively penetrates the tightening piece 2, the gasket 3, the seal and the sealing shell 1 and then enters the interior of the catheter sheath.

[0048] In this embodiment, the seal is a flexible member, such as silicone. After the interventional instrument is inserted into the hole in the seal, the tightening member 2 is rotated to move the tightening member 2 toward the distal end of the sealing housing 1 to reduce the penetration space between the tightening member 2 and the sealing housing 1, that is, the seal is squeezed to elastically deform by moving the tightening member 2 toward the distal end of the sealing housing 1, and the outer peripheral side of the seal abuts against the inner wall of the sealing housing 1 on the peripheral side of the penetration space. When the seal is elastically deformed, the seal squeezes the penetration hole inward until the wall of the penetration hole is closely abutted against the peripheral side of the interventional instrument to effectively prevent blood from flowing out or air from entering. At the same time, when the interventional instrument is penetrated, the tightening member 2 can be rotated in the opposite direction to reduce the squeeze on the seal by the tightening member 2, and the diameter of the penetration hole becomes larger. After the interventional instrument is penetrated into the penetration hole on the seal, the tightening member 2 is rotated again, so that the interventional instrument can pass smoothly and maintain a good operating feel.

[0049] In this embodiment, if Figure 2 and Figure 4 As shown, the sealing member includes a first sealing member 4 and a second sealing member 5 , the first sealing member 4 and the second sealing member 5 abut against each other, and the gasket 3 is arranged between the first sealing member 4 and the tightening member 2 .

[0050] In the above structure, in order to prevent the first seal 4 from twisting when the tightening member 2 rotates, thereby affecting the sealing between the first seal 4 and the interventional instrument, a gasket 3 is arranged between the tightening member 2 and the first seal 4. Since the contact surface between the first seal 4 and the gasket 3, and the contact surface between the gasket 3 and the tightening member 2 are both smooth surfaces, and the force used during tightening is not large, when the tightening member 2 is rotated, the tightening member 2 and the gasket 3 can move completely relative to each other, and the effect of twisting on the first seal 4 can be ignored.

[0051] In some implementations of this embodiment, Figure 2and Figure 4 As shown, the hole formed on the first sealing member 4 is a circular through hole, and the middle of the second sealing member 5 is cut along a cross to form four folded portions, and all the folded portions are configured to be pushed by the interventional instrument to bend toward the distal end of the second sealing member 5 to form a hole in the second sealing member 5. The second sealing member 5 is not limited to being cut along a cross, and other cutting methods may be used to form other numbers of folded portions.

[0052] In the above-mentioned embodiment, the hole formed on the first sealing member 4 is a circular through hole, which can facilitate the penetration of interventional instruments. The second sealing member 5 is provided with four folded portions, which can improve the wrapping of interventional instruments.

[0053] In some implementations of this embodiment, Figure 2 and Figure 4 As shown, the proximal end of the first sealing member 4 is recessed inward to form an annular placement cavity, and the distal end of the gasket 3 is protruding to be placed in the placement cavity. The proximal end of the gasket 3 is recessed inward to form an annular placement cavity, and the side of the screw-on member 2 close to the gasket 3 is provided with an annular protrusion suitable for being placed in the annular placement cavity of the gasket 3. Among them, the contact surface between the first sealing member 4 and the gasket 3, and the contact surface between the gasket 3 and the screw-on member 2 are both smooth surfaces.

[0054] In this embodiment, the outer circumference of the sealing housing 1 and the tightening member 2 are both provided with protruding prisms, which provide an anti-slip effect when the hemostatic valve is rotated, so as to better implement the operation of rotating the tightening member 2. Figure 1 As shown, an indicator 22, an enlargement mark 23 and a reduction mark 24 are provided on the outer peripheral side of the tightening member 2. The enlargement mark 23 is for enlarging the opening direction of the hemostatic valve, and the reduction mark 24 is for reducing the opening direction of the hemostatic valve.

[0055] In this embodiment, in order to prevent the screwing member 2 from falling off when the screwing member 2 is rotated to expand the opening of the hemostatic valve to the maximum, an annular limiting protrusion 11 is provided at the distal end of the external thread on the circumference of the sealing housing 1, and a limiting groove 21 is provided at the distal end of the internal thread on the inner side of the screwing member 2. The width of the limiting groove 21 is greater than the width of the limiting protrusion. When the screwing member 2 rotates relative to the sealing housing 1 under the action of an external force, the annular limiting protrusion 11 moves in the limiting groove 21. When the screwing member 2 is rotated to expand the opening of the hemostatic valve to the maximum, the side of the annular limiting protrusion 11 abuts against the groove wall of the limiting groove 21 to prevent the screwing member 2 from falling off. Among them, in order to facilitate the installation of the annular limiting protrusion 11 into the limiting groove 21, the outer edge of the limiting protrusion 11 and the outer edge of the limiting groove 21 are both set to be inclined surfaces. When the annular limiting protrusion 11 is installed into the limiting groove 21, the mutual compression of the two inclined surfaces can facilitate the limiting protrusion 11 to be squeezed into the limiting groove 21. Conversely, after the limiting protrusion 11 is squeezed into the limiting groove 21, the sides of the two close to each other are both vertical surfaces to prevent the limiting protrusion 11 from escaping from the limiting groove 21.

[0056] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A knob-type hemostatic valve, characterized in that: include: A sealing housing (1) adapted to be connected to the proximal end of the catheter sheath; A screw-on component (2) is connected to the proximal end of the sealing housing (1), and a penetration space suitable for inserting an interventional instrument is formed between the screw-on component (2) and the sealing housing (1); the screw-on component (2) is configured to move relative to the sealing housing (1) under the action of an external force, so as to reduce or increase the penetration space; A sealing member is arranged inside the penetration space, and a penetration hole suitable for penetrating an interventional instrument is provided on the sealing member; the sealing member is configured to be elastically deformed by being squeezed by the tightening member (2) so as to squeeze the penetration hole inwardly; Wherein, the tightening member (2) is configured to reduce the penetration space under the action of an external force, so as to squeeze the sealing member until the wall of the penetration hole is in close contact with the interventional instrument; The tightening member (2) is connected to the proximal end of the sealing housing by means of a threaded fit, and the tightening member (2) is configured to rotate relative to the sealing housing (1) under the action of an external force, so as to reduce or increase the penetration space; An annular limiting protrusion (11) is provided at the distal end of the external thread on the circumferential side of the sealing housing (1); a limiting groove (21) is provided at the distal end of the internal thread on the inner side of the tightening member (2); and when the tightening member (2) moves relative to the sealing housing (1) under the action of an external force, the annular limiting protrusion (11) moves in the limiting groove (21) to prevent the tightening member (2) from being separated from the sealing housing (1).

2. The knob-type hemostatic valve according to claim 1, characterized in that: It also comprises a gasket (3) on which a through hole is provided. The gasket (3) is arranged between the sealing member and the tightening member (2) to prevent the sealing member from being twisted by the tightening member (2).

3. The knob-type hemostatic valve according to claim 2, characterized in that: The sealing member comprises a first sealing member (4) and a second sealing member (5), the first sealing member (4) and the second sealing member (5) abut against each other, and the gasket (3) is arranged between the first sealing member (4) and the tightening member (2).

4. The knob-type hemostatic valve according to claim 3, characterized in that: The hole formed on the first sealing member (4) is a circular through hole; a plurality of folding portions are provided in the middle of the second sealing member (5), and all the folding portions are configured to bend toward one side of the second sealing member (5) when pushed by the interventional instrument, so as to form a hole formed in the second sealing member (5).

5. The knob-type hemostatic valve according to claim 4, characterized in that: The middle of the second sealing member (5) is cut along a cross to form four folded portions.

6. The knob-type hemostatic valve according to claim 3, characterized in that: The proximal end of the first sealing member (4) is recessed inwards to form an annular placement cavity, and the distal end of the gasket (3) is convex on one side to be placed in the placement cavity.

7. The knob-type hemostatic valve according to claim 3, characterized in that: The proximal end of the gasket (3) is recessed inwards to form an annular placement cavity, and the tightening member (2) is provided with an annular protrusion on the side close to the gasket (3) that is suitable for being placed in the annular placement cavity of the gasket (3).

8. The knob-type hemostatic valve according to claim 3 or 6, characterized in that: The contact surface between the first sealing member (4) and the gasket (3), and the contact surface between the gasket (3) and the tightening member (2) are both smooth surfaces.

9. The knob-type hemostatic valve according to claim 1, characterized in that: The outer circumferences of the sealing housing (1) and the tightening member (2) are both provided with protruding prisms.

10. The knob-type hemostatic valve according to claim 1, characterized in that: An indicator (22), an enlargement mark (23) and a reduction mark (24) are provided on the outer peripheral side of the tightening member (2).

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