A blood vessel sheath structure

Abstract

The application discloses a blood leakage prevention vascular sheath structure, which comprises a catheter sheath, a connecting head fixedly connected with one end of the catheter sheath, a tube sheath base connected with the catheter sheath through the connecting head, an end cover assembly detachably installed at one end of the tube sheath base away from the catheter sheath, a connecting base fixedly arranged on one side of the tube sheath base, a hose connected with the tube sheath base through the connecting base and a three-way valve connected with one end of the hose away from the tube sheath base. The middle of the reinforcing gasket is protruded to press the hemostasis valve, so that the hemostasis valve forms a recess in the direction of the distal end of the sheath tube, the hemostasis strength of the hemostasis valve is enhanced, and the blood leakage prevention purpose is achieved. The initial protruding degree of the reinforcing gasket relative to the sealing cap is adjusted through the end cover assembly, different specifications of guide wires or implantation instruments can be applied, the guide wire can smoothly pass through, and the deformation influence on the hemostasis valve is reduced to the minimum.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vascular sheaths, and particularly relates to a blood leakage prevention vascular sheath structure. BACKGROUND

[0002] The vascular sheath establishes a channel for a blood vessel during an operation. When the vascular sheath is inserted into the blood vessel, blood leakage or dripping is likely to occur due to the blood flow pressure in the blood vessel. SUMMARY

[0003] In order to solve the above problems existing in the prior art, the present application aims to provide a blood leakage prevention vascular sheath structure.

[0004] The technical scheme adopted by the present application is as follows:

[0005] The blood leakage prevention vascular sheath structure comprises a catheter sheath, a connecting head fixedly connected to one end of the catheter sheath, a tube sheath seat connected to the catheter sheath through the connecting head, an end cover assembly detachably installed at an end of the tube sheath seat away from the catheter sheath, a connecting seat fixedly arranged on one side of the tube sheath seat, a flexible tube connected to the tube sheath seat through the connecting seat, and a three-way valve connected to an end of the flexible tube away from the tube sheath seat.

[0006] A hemostatic valve is arranged in the tube sheath seat, a bowl-shaped portion is formed at the center of the hemostatic valve, and a self-sealing seam is arranged in the center of the bowl-shaped portion. A reinforcing pad is arranged between the hemostatic valve and the end cover assembly, a conical portion is formed at the center of the reinforcing pad, and the conical portion extrudes the hemostatic valve to keep the hemostatic valve protruding to the side where the catheter sheath is located.

[0007] The end cover assembly comprises a cap and a control pad. The cap is threadedly connected to the tube sheath seat, the control pad is arranged between the cap and the reinforcing pad, and the control pad is used for adjusting the extrusion degree of the reinforcing pad on the hemostatic valve. A positioning groove is fixedly arranged at an end of the cap away from the catheter sheath, and a reference groove is fixedly arranged on the circumferential side of the tube sheath seat. The reference groove is matched with the positioning groove.

[0008] As a preferred embodiment of the present application, the tube sheath seat comprises a connecting portion arranged in the connecting head. A connecting cavity and a placement cavity are formed in the tube sheath seat and are in communication with each other. The connecting cavity corresponds to the connecting portion, and the connecting cavity is in communication with the catheter sheath. A guide portion is formed between the connecting cavity and the placement cavity on the inner wall of the tube sheath seat. An injection hole corresponding to the connecting seat is arranged on the inner wall of one side of the placement cavity, and the injection hole is in communication with the flexible tube. The hemostatic valve and the reinforcing pad are arranged in the placement cavity.

[0009] As a preferred embodiment of the present application, the center of the end cover assembly is provided with an insertion hole, and the center of the reinforcing pad is provided with a through hole, and a guide wire can pass through the catheter sheath, the connecting cavity, the installation cavity, the self-sealing, the through hole and the insertion hole in sequence.

[0010] As a preferred embodiment of the present application, the installation cavity is stepped, the inner diameter of the installation cavity near the side of the cap is larger than the inner diameter of the installation cavity near the side of the catheter sheath, and the hemostatic valve is embedded in the stepped portion of the installation cavity; a first limiting groove is fixedly arranged on the inner wall of the side of the installation cavity near the cap, a first limiting pin is fixedly arranged on the peripheral side of the reinforcing pad, the reinforcing pad is in sliding connection with the catheter sheath seat, and the first limiting pin is matched with the first limiting groove.

[0011] As a preferred embodiment of the present application, the end of the cap near the catheter sheath is fixedly provided with an inner clamping ring and an outer clamping ring, the installation groove is formed between the inner clamping ring and the outer clamping ring, the control pad is installed in the installation groove, a spiral groove is fixedly arranged on the inner wall of the installation groove, a sliding rod is fixedly arranged on the peripheral side of the reinforcing pad, and the sliding rod is in sliding connection with the spiral groove.

[0012] As a preferred embodiment of the present application, the end face of the cap near the catheter sheath is provided with a calibration scale, one end of the control pad near the catheter sheath is fixedly provided with a positioning ring, the positioning ring is provided with an alignment scale, and the alignment scale is matched with the calibration scale.

[0013] As a preferred embodiment of the present application, the end cover assembly further comprises a rotating ring and a control ring between the reinforcing pad and the cap, one end of the control pad near the cap is fixedly provided with a containing groove, the rotating ring is in sliding connection with the containing groove, a second limiting groove is arranged on the containing groove, a second limiting pin is fixedly arranged on the end face of the rotating ring near the catheter sheath, the second limiting pin is matched with the second limiting groove, a torsional spring is arranged on the inner side of the rotating ring, one end of the torsional spring is fixedly connected with the inner side wall of the rotating ring, the other end of the torsional spring is fixedly connected with the inner clamping ring, an installation groove is fixedly arranged on one end of the rotating ring near the cap, a wedge-shaped tooth is fixedly arranged in the installation groove, a limiting tooth is fixedly arranged on the end of the control ring away from the cap, and the wedge-shaped tooth is matched with the limiting tooth.

[0014] As a preferred embodiment of the present application, an extension groove is fixedly arranged on the end of the installation groove away from the catheter sheath, the control ring is located in the extension groove, the control ring is in sliding connection with the extension groove, a third limiting groove is fixedly arranged on the extension groove, a third limiting pin is fixedly arranged on the end of the control ring away from the catheter sheath, and the third limiting pin is matched with the third limiting groove.

[0015] As a preferred embodiment of the present invention, a control spring is provided at the end of the control ring away from the catheter sheath, one end of the control spring is fixedly connected to the control ring, and the other end of the control spring is fixedly connected to the inner wall of the extension groove; a side ring groove is provided on the outer side of the rotating ring away from the end of the catheter sheath, a limiting ring is fixedly provided on the inner wall of the placement groove, and the limiting ring is rotatably connected to the side ring groove.

[0016] As a preferred embodiment of the present invention, a friction portion is provided on the outer side of the positioning ring, and the friction portion cooperates with the tapered portion. The friction portion and the tapered portion are squeezed by an external force and rotate synchronously under the action of the friction force.

[0017] The beneficial effects of the present invention are as follows: as a vascular sheath structure for preventing bleeding, the present invention presses the hemostatic valve by bulging out in the middle of the reinforcing gasket, so that the hemostatic valve forms a depression toward the distal end of the sheath tube, thereby strengthening the hemostatic strength of the hemostatic valve and achieving the purpose of preventing bleeding; by pre-adjusting the end cover assembly, the initial protrusion degree of the reinforcing gasket relative to the sealing cap is changed, and it can be suitable for guide wires or insertion instruments of different specifications, so that the guide wire can pass smoothly while minimizing the deformation effect on the hemostatic valve; when it is necessary to repeatedly insert the guide wire or other insertion instrument, the degree of squeezing of the hemostatic valve by the reinforcing gasket can be further increased in subsequent operations to ensure that the hemostatic valve still has good pressure-bearing capacity after being passed through multiple times. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 This invention Figure 1 A schematic diagram of the front structure of FIG.

[0021] Figure 3 This invention Figure 2 Schematic diagram of the cross-sectional structure;

[0022] Figure 4 This invention Figure 3 A schematic diagram of the enlarged structure at point A;

[0023] Figure 5 This invention Figure 4 A schematic diagram of the enlarged structure at point B;

[0024] Figure 6 This invention Figure 1 Schematic diagram of the explosion structure;

[0025] Figure 7 This invention Figure 6 Schematic diagram of the structure after the catheter sheath and hose are hidden;

[0026] Figure 8 This invention Figure 7 Schematic diagram of the explosion structure of the end cover assembly;

[0027] Figure 9 This invention Figure 8 Schematic diagram of the enlarged structure at C;

[0028] Figure 10 This invention Figure 8 Schematic diagram of the rear side perspective structure;

[0029] Figure 11 This invention Figure 10 The enlarged structural diagram at D is shown. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0032] The following combination Figures 1-11 The specific embodiment of the present invention is described as follows: a vascular sheath structure for preventing blood leakage includes a catheter sheath 11, a connector 12 fixedly connected to one end of the catheter sheath 11, a sheath seat 13 connected to the catheter sheath 11 via the connector 12, an end cap assembly 14 detachably mounted on an end of the sheath seat 13 away from the catheter sheath 11, a connecting seat 15 fixedly disposed on one side of the sheath seat 13, a hose 16 connected to the sheath seat 13 via the connecting seat 15, and a three-way valve 17 connected to an end of the hose 16 away from the sheath seat 13;

[0033] The tube sheath seat 13 is provided with a hemostasis valve 24, the center of the hemostasis valve 24 is formed as a bowl-shaped part 38, the bowl-shaped part 38 is provided with a self-sealing seam 22; the hemostasis valve 24 and the end cap assembly 14 are provided with a reinforcing pad 20, the center of the reinforcing pad 20 is formed as a tapered part 40, the tapered part 40 extrudes the hemostasis valve 24 to make the hemostasis valve 24 keep protruding to the side where the catheter sheath 11 is located; the hemostasis valve 24 is protruded to the far end in the center, forming a dome structure, strengthening the hemostasis strength of the hemostasis valve 24, making it can withstand greater pressure, achieving the purpose of preventing blood drops. The shape of the tapered part 40 is similar to the thin wall side of a circular truncated cone.

[0034] The end cap assembly 14 includes a cap 23 and a control pad 21, the cap 23 is threadedly connected with the tube sheath seat 13, the control pad 21 is located between the cap 23 and the reinforcing pad 20, the control pad 21 is used for adjusting the extrusion degree of the reinforcing pad 20 to the hemostasis valve 24; the cap 23 is fixedly provided with a positioning groove 47 at the end away from the catheter sheath 11, the tube sheath seat 13 is fixedly provided with a reference groove 36 on the circumferential side, the reference groove 36 cooperates with the positioning groove 47. The cap 23 is used for pushing the reinforcing pad 20 close to the hemostasis valve 24, by controlling the pushing degree of the cap 23 to the reinforcing pad 20, then controlling the deformation degree of the hemostasis valve 24, making the guide wire can pass through smoothly, at the same time, the influence on the deformation of the hemostasis valve 24 is reduced to the minimum, ensuring that the hemostasis valve 24 still has good sealing shielding effect after the subsequent guide wire is pulled out.

[0035] Beneficially, the tube sheath seat 13 includes a connecting part 26 located inside the connecting head 12, the tube sheath seat 13 is formed with a connecting cavity 27 and a placement cavity 19 which are communicated with each other, the connecting cavity 27 corresponds to the connecting part 26, the connecting cavity 27 is communicated with the catheter sheath 11, the inner wall of the tube sheath seat 13 is formed with a guide part 25 between the connecting cavity 27 and the placement cavity 19; the inner wall of one side of the placement cavity 19 is provided with an injection hole 18 corresponding to the connecting seat 15, the injection hole 18 is communicated with the hose 16; the hemostasis valve 24 and the reinforcing pad 20 are located in the placement cavity 19. The guide part 25 is used for guiding the passing of the guide wire, reducing the difficulty of subsequent insertion of the guide wire.

[0036] Beneficially, the center of the end cap assembly 14 is provided with an insertion hole 46, the center of the reinforcing pad 20 is provided with a through hole 41, the guide wire can pass through the catheter sheath 11, the connecting cavity 27, the placement cavity 19, the self-sealing seam 22, the through hole 41 and the insertion hole 46 in sequence. The way that the guide wire is allowed to pass through is bidirectional, when the catheter sheath 11 is placed for the first time, the guide wire passes through from the catheter sheath 11, when it is inserted subsequently, it is inserted from one side of the end cap assembly 14; in subsequent surgical treatment, the catheter sheath 11 is kept in the indwelling state, in addition to the guide wire, it can also be used to pass through a dilating tube or other instruments.

[0037] Beneficially, the installation cavity 19 is stepped, the inner diameter of the installation cavity 19 near the cap 23 is larger than the inner diameter of the installation cavity 19 near the catheter sheath 11, and the hemostatic valve 24 is embedded in the stepped part of the installation cavity 19; a first limiting groove 37 is fixedly arranged on the inner wall of the installation cavity 19 near the cap 23, and a first limiting pin 39 is fixedly arranged on the peripheral side of the reinforcing pad 20; the reinforcing pad 20 is in sliding connection with the catheter sheath seat 13, and the first limiting pin 39 is in cooperation with the first limiting groove 37. The edge of the hemostatic valve 24 is in close contact with the stepped part of the installation cavity 19, the conical part 40 of the reinforcing pad 20 extrudes the bowl-shaped part 38 in the middle of the hemostatic valve 24, and the extrusion degree determines the protrusion degree of the bowl-shaped part 38.

[0038] Beneficially, the cap 23 is fixedly provided with an inner clamping ring 29 and an outer clamping ring 59 near one end of the catheter sheath 11, the installation groove 33 is formed between the inner clamping ring 29 and the outer clamping ring 59, the control pad 21 is installed in the installation groove 33, the helical groove 55 is fixedly arranged on the inner wall of the installation groove 33, the sliding rod 43 is fixedly arranged on the peripheral side of the reinforcing pad 20, and the sliding rod 43 is in sliding connection with the helical groove 55. The helical groove 55 has two parts and is rotationally symmetrical, and is respectively in cooperation with the two sliding rods 43.

[0039] Beneficially, the cap 23 is provided with a calibration scale 54 on the end face near the catheter sheath 11, the control pad 21 is fixedly provided with a positioning ring 57 near one end of the catheter sheath 11, the positioning ring 57 is provided with an alignment scale 58, and the alignment scale 58 is in cooperation with the alignment scale 58. The relative rotation angle of the control pad 21 and the cap 23 is known through the alignment scale 58 and the alignment scale 58, so that the protrusion degree of the control pad 21 is known, and the two have a proportional relationship.

[0040] Beneficially, the end cover assembly 14 further comprises a rotating ring 35 and a control ring 30 between the reinforcing pad 20 and the cap 23, the control pad 21 is fixedly provided with a containing groove 28 near one end of the cap 23, the rotating ring 35 is in sliding connection with the containing groove 28, the containing groove 28 is provided with a second limiting groove 45, the rotating ring 35 is fixedly provided with a second limiting pin 42 on the end face near the catheter sheath 11, the second limiting pin 42 is in cooperation with the second limiting groove 45, the inner side of the rotating ring 35 is provided with a torsional spring 50, one end of the torsional spring 50 is fixedly connected with the inner side wall of the rotating ring 35, and the other end of the torsional spring 50 is fixedly connected with the inner clamping ring 29. The torsional spring 50 has a tendency to rotate the control pad 21 in one direction, and the control pad 21 will automatically reset when the control pad 21 loses constraint.

[0041] Beneficially, the rotating ring 35 is fixed with a mounting groove 48 near one end of the cap 23, the mounting groove 48 is fixed with a wedge-shaped tooth 49, the control ring 30 is fixed with a limiting tooth 51 away from one end of the cap 23, the wedge-shaped tooth 49 and the limiting tooth 51 cooperate, the installation groove 33 is fixed with an extension groove 44 away from one end of the catheter sheath 11, the control ring 30 is located in the extension groove 44, the control ring 30 and the extension groove 44 are in sliding connection, the extension groove 44 is fixed with a third limiting groove 60, the control ring 30 is fixed with a third limiting pin 52 away from one end of the catheter sheath 11, the third limiting pin 52 cooperates with the third limiting groove 60. The wedge-shaped tooth 49 and the limiting tooth 51 are one-way locked, the control spring 31 always has a tendency to make the control ring 30 close to the wedge-shaped tooth 49, and the torsional spring 50 has a tendency to make the wedge-shaped tooth 49 rotate relative to the limiting tooth 51; under normal circumstances, when the control pad 21 is manually rotated, the control pad 21 and the cap 23 rotate relatively, taking the cap 23 as a reference, the cap 23 is stationary, and the control pad 21 rotates in one direction; the control ring 30 and the cap 23 maintain the same angle, the rotating ring 35 rotates with the control pad 21, the side ring groove 34 rotates relative to the limiting ring 32, the control pad 21 is affected by the cooperation of the sliding rod 43 and the spiral groove 55, and the control pad 21 moves axially during rotation; the movement of the control pad 21 causes the axial relative displacement of the control pad 21 and the rotating ring 35, the second limiting pin 42 and the second limiting groove 45 slide, but do not separate, and do not affect the synchronous rotation of the rotating ring 35 and the control pad 21; when the wedge-shaped surface of the wedge-shaped tooth 49 is on the tooth top of the limiting tooth 51, the wedge-shaped surface of the wedge-shaped tooth 49 pushes the limiting tooth 51 and the control ring 30 to move axially, because the position of the rotating ring 35 in the axial direction is limited by the side ring groove 34 and the limiting ring 32, and the control spring 31 is compressed; when the wedge-shaped surface of the wedge-shaped tooth 49 passes through the tooth top of the limiting tooth 51, the control ring 30 immediately rebounds under the action of the control spring 31, the limiting tooth 51 and the wedge-shaped tooth 49 cooperate to prevent the control pad 21 from being reversed, and the torsional spring 50 has a tendency to make the rotating ring 35 and the cap 23 rotate, so that the control pad 21 does not spontaneously rotate under the condition of no external force or the force applied cannot overcome the torsional spring 50 and the control spring 31.

[0042] Beneficially, the control ring 30 is provided with a control spring 31 away from one end of the catheter sheath 11, one end of the control spring 31 is fixedly connected with the control ring 30, the other end of the control spring 31 is fixedly connected with the inner wall of the extension groove 44; the outer side of the rotating ring 35 away from one end of the catheter sheath 11 is provided with a side ring groove 34, the inner wall of the installation groove 33 is fixedly provided with a limiting ring 32, the limiting ring 32 is rotationally connected with the side ring groove 34. The side ring groove 34 limits the axial displacement of the rotating ring 35, and the rotating ring 35 can only rotate relative to the cap 23. The control ring 30 is made of iron, and when the control pad 21 is manually rotated, it can only be rotated in one direction allowed. If it is rotated excessively, the end cover assembly 14 is placed on the strong magnetic plate with the calibration scale 54 upward, the iron control ring 30 is attracted by the magnet, overcomes the elastic force of the control spring 31, the control spring 31 is compressed, the control ring 30 and the rotating ring 35 keep away from each other, the limiting teeth 51 and the wedge-shaped teeth 49 are separated, and the control pad 21 is allowed to rotate in the opposite direction. Under the action of the torsional spring 50, the rotating ring 35 automatically rotates, and the rotation angle of the control pad 21 is reset.

[0043] Beneficially, the outer side of the positioning ring 57 is provided with a friction part 56, the friction part 56 cooperates with the tapered part 40, and the friction part 56 and the tapered part 40 are extruded by external force and synchronously rotate under the action of friction. The contact part of the friction part 56 and the tapered part 40 is rough, and relative rotation between the two is not easy to occur through extrusion.

[0044] The working principle of the present application is as follows:

[0045] In the initial state, the end cover assembly 14 and the tube sheath seat 13 are in a disassembled state, and the end cover assembly 14 is pre-adjusted according to the specification of the guide wire before use; the position of the control pad 21 relative to the cap 23 is manually rotated, whether the control pad 21 is rotated to the required position is judged according to the corresponding positions of the calibration scale 54 and the alignment scale 58, the smaller the diameter of the guide wire, the greater the rotation angle, the higher the height of the control pad 21 protruding relative to the installation groove 33, the farther the distance between the control pad 21 and the reinforcing pad 20 after the installation of the end cover assembly 14 and the tube sheath seat 13, the greater the degree of extrusion of the hemostatic valve 24 by the reinforcing pad 20, and the smaller the amplitude of the hemostatic valve 24 allowed to rebound to the concave side, so that the guide wire passes through the self-sealing slit 22 from the convex side of the hemostatic valve 24 without causing excessive deformation of the hemostatic valve 24. After the guide wire passes through, the sealing effect of the self-sealing slit 22 is better after the hemostatic valve 24 rebounds to close it, and the hemostatic effect is better; on the contrary, the larger the diameter of the guide wire, the smaller the rotation angle, the greater the amplitude of the hemostatic valve 24 allowed to rebound to the concave side, and the guide wire is more easily passed through the self-sealing slit 22 from the convex side of the hemostatic valve 24. By controlling the amplitude of the hemostatic valve 24 rebounding to the concave side, the guide wire can pass through smoothly while the deformation of the hemostatic valve 24 is minimized.

[0046] After pre-adjustment, the hemostatic valve 24 and the reinforcing pad 20 are respectively placed into the accommodation cavity 19, and then the end cap assembly 14 is screwed on the tube sheath base 13. The connection between the end cap assembly 14 and the tube sheath base 13 is provided with a limiting structure, and the positioning groove 47 must be aligned with the reference groove 36 before being screwed. After the positioning groove 47 and the reference groove 36 are aligned, the end cap assembly 14 is screwed, and after one rotation, the positioning groove 47 is guaranteed to be aligned with the reference groove 36 again and stopped. After stopping, there is still a gap between the end cap assembly 14 and the tube sheath base 13. At this time, the reference is changed, and the tube sheath base 13 is the reference. The tube sheath base 13 remains stationary, and the end cap assembly 14 is rotated. In this process, the positioning ring 57 of the control pad 21 gradually approaches the reinforcing pad 20, and the reinforcing pad 20 slides. The first limiting pin 39 and the first limiting groove 37 slide, and the tapered portion 40 pushes and extrudes the bowl-shaped portion 38. At the beginning, the friction between the tapered portion 40 and the torsional spring 50 is small. As the extrusion deepens, the friction between the tapered portion 40 and the torsional spring 50 gradually increases. The pre-adjusted position of the control pad 21 affects the moment when the critical value is reached. The more the control pad 21 protrudes, the faster the critical value is reached.

[0047] After reaching the critical value, the end cap assembly 14 is continuously rotated. Due to the friction between the tapered portion 40 and the friction portion 56, the positioning ring 57 and the control pad 21 cannot rotate relative to the tube sheath base 13. Continuing to rotate the end cap assembly 14 causes the cap 23 and the control pad 21 to rotate relative to each other. The relative rotation of the cap 23 and the control pad 21 will cause the protrusion of the control pad 21 to increase, thereby further forcing the reinforcing pad 20 to extrude the hemostatic valve 24. The greater the degree of extrusion of the hemostatic valve 24, the more difficult it is to rebound.

[0048] After adjustment, the normal operation is performed. The catheter sheath 11 is stretched into the specified position of the target blood vessel by using the guide wire. The proximal end of the guide wire will pass through the catheter sheath 11, the connecting cavity 27, the accommodation cavity 19, the self-sealing seam 22, the through hole 41 and the insertion hole 46 in sequence. When the catheter sheath 11 reaches the specified position, it is fixed, and then the guide wire is pulled out. After the guide wire is pulled out, the hemostatic valve 24 is closed at the self-sealing seam 22. The hemostatic valve 24 isolates the left and right sides thereof. The structure protruding to the distal end of the hemostatic valve 24 can ensure that the hemostatic valve 24 can withstand a larger pressure without deformation, thereby achieving the purpose of preventing blood leakage.

[0049] In a certain time after the operation, the sheath is left in place, and if necessary, the guide wire can be reinserted from the proximal end for adjustment. After the guide wire is inserted twice or more times, in order to avoid the shielding effect of the self-sealing seam 22 from being reduced after being opened and closed multiple times, the end cap assembly 14 can be further screwed relative to the tube sheath base 13. The same principle as above applies, and further screwing will further press the hemostatic valve 24. Within a certain range, the greater the degree of compression of the hemostatic valve 24, the more full the protrusion of the bowl-shaped portion 38, the less likely it is to collapse, the greater the pressure-bearing capacity, and the better the effect of preventing blood leakage. It should be further noted that the hemostatic valve 24 is made of non-uniform elastic material, and the main part that deforms under the compression of the reinforcing pad 20 is the edge of the hemostatic valve 24. The position of the self-sealing seam 22 deforms very little and does not affect the sealing and shielding effect at the self-sealing seam 22. In addition, the subsequent insertion of the guide wire is inserted from the side of the bowl-shaped portion 38 that is recessed, and it will not be inserted because the bowl-shaped portion 38 cannot rebound to the recessed side.

[0050] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] The above is only an example and description of the structure of the present application. Those skilled in the art can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined by the claims of the present application.

Claims

1. A blood leakage preventing vascular sheath structure, characterized by: The application relates to a catheter sheath, which comprises a catheter sheath, a connecting head fixedly connected with one end of the catheter sheath, a tube sheath base connected with the catheter sheath through the connecting head, an end cover assembly detachably mounted at one end of the tube sheath base away from the catheter sheath, a connecting base fixedly arranged at one side of the tube sheath base, a hose connected with the tube sheath base through the connecting base, and a three-way valve connected with one end of the hose away from the tube sheath base. The tube sheath base is internally provided with a hemostatic valve, the center of the hemostatic valve is formed with a bowl-shaped part, the center of the bowl-shaped part is provided with a self-sealing seam; a reinforcing pad is arranged between the hemostatic valve and the end cover assembly, the center of the reinforcing pad is formed with a conical part, and the conical part extrudes the hemostatic valve so that the hemostatic valve is kept protruding to the side where the catheter sheath is located. The end cover assembly comprises a sealing cap and a control pad, the sealing cap is threadedly connected with the tube sheath base, the control pad is arranged between the sealing cap and the reinforcing pad, and the control pad is used for adjusting the extrusion degree of the reinforcing pad to the hemostatic valve; one end of the sealing cap away from the catheter sheath is fixedly provided with a positioning groove, and the periphery of the tube sheath base is fixedly provided with a reference groove matched with the positioning groove. The tube sheath base comprises a connecting part arranged in the connecting head, the inside of the tube sheath base is formed with a connecting cavity and a mounting cavity which are communicated with each other, the connecting cavity corresponds to the connecting part, the mounting cavity is in a stepped shape, the inner diameter of the mounting cavity near the sealing cap is larger than that of the mounting cavity near the catheter sheath, and the hemostatic valve is embedded in the step part of the mounting cavity; a first limiting groove is fixedly arranged on the inner wall of the mounting cavity near the sealing cap, a first limiting pin is fixedly arranged on the periphery of the reinforcing pad, the reinforcing pad is slidably connected with the tube sheath base, and the first limiting pin is matched with the first limiting groove. The sealing cap is used for pushing the reinforcing pad to be close to the hemostatic valve, the deformation degree of the hemostatic valve is controlled by controlling the pushing degree of the reinforcing pad by the sealing cap, the relative rotation of the sealing cap and the control pad can cause the protruding degree of the control pad to increase, the edge of the hemostatic valve is close to the step part of the mounting cavity, the bowl-shaped part in the middle of the hemostatic valve is extruded by the conical part of the reinforcing pad, and the extrusion degree determines the protruding degree of the bowl-shaped part; so as to further force the reinforcing pad to extrude the hemostatic valve, and the greater the extrusion degree of the hemostatic valve is, the more difficult the hemostatic valve is to rebound.

2. A blood leakage preventing vascular sheath structure according to claim 1, characterized in that: The connecting cavity is communicated with the catheter sheath, the inner wall of the tube sheath base forms a guide part between the connecting cavity and the mounting cavity; one side of the inner wall of the mounting cavity is provided with an injection hole corresponding to the connecting base, the injection hole is communicated with the hose; the hemostatic valve and the reinforcing pad are located in the mounting cavity.

3. A blood leakage preventing vascular sheath structure according to claim 2, characterized in that: The center of the end cover assembly is provided with an insertion hole, the center of the reinforcing pad is provided with a through hole, and a guide wire can pass through the catheter sheath, the connecting cavity, the mounting cavity, the self-sealing seam, the through hole and the insertion hole in sequence.

4. The leakproof hemostatic vascular sheath of claim 1, wherein: One end of the sealing cap near the catheter sheath is fixedly provided with an inner clamping ring and an outer clamping ring, the inner clamping ring and the outer clamping ring form a mounting groove therebetween, the control pad is mounted in the mounting groove, a spiral groove is fixedly arranged on the inner wall of the mounting groove, a sliding rod is fixedly arranged on the periphery of the reinforcing pad, and the sliding rod is slidably connected with the spiral groove.

5. The blood leakage preventing vascular sheath structure according to claim 2, wherein: The cap is provided with a calibration scale near the end face of the catheter sheath, the control pad is fixedly provided with a positioning ring near one end of the catheter sheath, and the positioning ring is provided with an alignment scale, which cooperates with the calibration scale.

6. A blood leakage preventing vascular sheath structure according to claim 4, characterized in that: The end cover assembly further comprises a rotating ring and a control ring between the reinforcing pad and the cap, the control pad is fixedly provided with a containing groove near one end of the cap, the rotating ring is in sliding connection with the containing groove, the containing groove is provided with a second limiting groove, the rotating ring is fixedly provided with a second limiting pin near the end face of the catheter sheath, the second limiting pin cooperates with the second limiting groove, the inner side of the rotating ring is provided with a torsion spring, one end of the torsion spring is fixedly connected with the inner side wall of the rotating ring, and the other end of the torsion spring is fixedly connected with the inner clamping ring; the rotating ring is fixedly provided with a mounting groove near one end of the cap, the mounting groove is fixedly provided with a wedge-shaped tooth, the control ring is fixedly provided with a limiting tooth away from the cap, and the wedge-shaped tooth cooperates with the limiting tooth.

7. A blood leakage preventing vascular sheath structure according to claim 6, characterized in that: The setting groove is fixedly provided with an extension groove away from one end of the catheter sheath, the control ring is located in the extension groove, the control ring is in sliding connection with the extension groove, the extension groove is fixedly provided with a third limiting groove, and the control ring is fixedly provided with a third limiting pin away from one end of the catheter sheath, the third limiting pin cooperates with the third limiting groove.

8. A blood leakage preventing vascular sheath structure according to claim 7, characterized in that: The control ring is provided with a control spring away from one end of the catheter sheath, one end of the control spring is fixedly connected with the control ring, and the other end of the control spring is fixedly connected with the inner wall of the extension groove; the outer side of the rotating ring away from one end of the catheter sheath is provided with a side ring groove, the inner wall of the setting groove is fixedly provided with a limiting ring, and the limiting ring is in rotating connection with the side ring groove.

9. The leakproof hemostatic vascular sheath structure of claim 5, wherein: The outer side of the positioning ring is provided with a friction part, the friction part cooperates with the tapered part, the friction part and the tapered part are extruded by external force and will rotate synchronously under the action of friction force.

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