Blood vessel sheath for preventing air from being injected into blood vessel

Abstract

The utility model provides a blood vessel sheath for preventing air from being injected into a blood vessel, which comprises a sheath tube used for extending into the blood vessel, a hemostatic clip fixedly arranged at the near end of the sheath tube, a connecting hose fixedly arranged at the side part of the hemostatic clip and communicated with the inside of the hemostatic clip, and a prevention valve arranged at one end of the connecting hose far away from the sheath tube, the prevention valve comprises a valve body, a valve plate, an assembling plate, a spring, a valve ball, a telescopic sleeve, a fixing plate and a hard pipe, and a connecting nozzle communicated with the interior of the valve body is integrally arranged at the front end of the valve body. The blood vessel sheath for preventing the air from being injected into the blood vessel is mainly composed of the sheath tube, the hemostatic clip, the connecting hose and the prevention valve, the arranged prevention valve can prevent the undesirable phenomenon that blood of a patient flows back through the connecting hose when an injector is removed, and blood loss of the patient can be avoided; meanwhile, bubbles in the liquid medicine can be prevented from entering blood vessels through the sheathing canal, and therefore potential safety hazards are eradicated.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a vascular sheath for preventing air from being injected into a blood vessel. Background Art

[0002] Vascular sheaths are commonly used interventional surgical products in clinical practice. They are designed for percutaneous puncture insertion into the vascular system to establish a channel and then introduce catheters / wires and other instruments. They are devices that assist catheters / wires and other instruments to enter blood vessels. They are mainly composed of a sheath, a side arm connecting tube, and a hemostatic valve.

[0003] At present, a Chinese patent with publication number CN219043042U discloses a vascular sheath, which includes a hemostatic valve, a locking device, a sheath tube, an expansion tube, a side arm connecting tube and a three-way valve; the locking device includes an inner ring, an outer ring and a locking plate assembly rotatably abutting between the inner ring and the outer ring, the inner ring is connected to the tail end of the hemostatic valve, the outer ring is concentrically arranged with the inner ring, and the outer ring can rotate circumferentially relative to the inner ring and drive the locking plate assembly to close or open.

[0004] Although the above-mentioned vascular sheath can effectively lock the relative position of the inner core and the hemostatic valve, the inner core will not be relatively displaced with the hemostatic valve during the patient's turning over, which effectively ensures the patient's life safety. However, in actual use, it is found that when injecting liquid medicine through the side arm connecting tube, blood is prone to flow back through the side arm connecting tube when the syringe is removed, which can cause blood loss in the patient. In addition, during the injection of liquid medicine, bubbles in the liquid medicine are easy to enter the sheath tube through the side arm connecting tube and then enter the blood vessel, posing a safety hazard.

[0005] To this end, a vascular sheath is proposed to prevent air from being injected into the blood vessel. Utility Model Content

[0006] The utility model aims to solve the problems raised in the background technology and provides a vascular sheath for preventing air from being injected into a blood vessel.

[0007] The specific technical solutions are as follows:

[0008] A vascular sheath for preventing air from being injected into a blood vessel, comprising:

[0009] A sheath tube is used to extend into a blood vessel, a hemostatic clamp is fixedly installed on the proximal end of the sheath tube, a connecting hose connected to the inside of the hemostatic clamp is fixedly installed on the side of the hemostatic clamp, and a preventive valve is installed on the end of the connecting hose away from the sheath tube.

[0010] As a preferred solution of the utility model, the preventive valve includes a valve body, a valve plate, a matching plate, a spring, a valve ball, a telescopic sleeve, a fixed plate and a hard tube. The front end of the valve body is integrally provided with a connecting nozzle connected to the interior thereof, the end of the connecting hose away from the sheath tube is fixedly inserted into the interior of the connecting nozzle, the valve plate is fixedly installed at the rear end of the valve body, and a through hole is opened at the center position of the valve plate, the matching plate is fixedly installed in the interior of the valve body, the spring is fixedly installed on a side surface of the matching plate facing the valve plate, the valve ball is fixedly installed on the end of the spring away from the matching plate, and the The valve ball is pressed against the front end of the through hole under the action of the spring and closes the front end of the through hole. The front end of the telescopic sleeve is sealed and fixedly installed on the rear end of the valve body. The fixed plate is sealed and fixedly installed on the rear end of the telescopic sleeve. The hard tube is fixedly inserted at the center position of the fixed plate, and the front end of the hard tube can extend into the through hole and push the valve ball out of the through hole. A plurality of liquid outlet holes are opened on the side wall of the hard tube near its front end. When the front end of the hard tube pushes the valve ball out of the through hole, the plurality of liquid outlet holes can be connected with the interior of the connecting nozzle.

[0011] As a preferred solution of the utility model, the rear end of the hard tube is integrally provided with a connector connected to the interior thereof.

[0012] As a preferred solution of the utility model, a limit block is fixedly mounted on the hard tube, and the limit block is located inside the telescopic sleeve. When the hard tube moves toward the through hole, it can drive the limit block to press against the rear side of the valve plate to close the rear end of the through hole.

[0013] As a preferred solution of the utility model, the mounting plate is arranged close to the front end of the valve body, and a gap is connected between the mounting plate and the connecting nozzle.

[0014] As a preferred solution of the utility model, the telescopic sleeve is a silicone corrugated telescopic sleeve.

[0015] As a preferred solution of the utility model, a filter is also installed on the connecting hose, and the filter is located between the hemostatic clamp and the preventive valve.

[0016] As a preferred solution of the utility model, the valve body is a transparent cylindrical plastic shell.

[0017] The utility model has the following beneficial effects:

[0018] The vascular sheath for preventing air from being injected into a blood vessel provided by the utility model is mainly composed of a sheath tube, a hemostatic clamp, a connecting hose and a preventive valve. The arranged preventive valve can prevent the adverse phenomenon of the patient's blood flowing back through the connecting hose when the syringe is removed, thereby avoiding the patient's blood loss, and at the same time can prevent the air bubbles in the medicine solution from entering the blood vessel through the sheath tube, thereby eliminating safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a vascular sheath for preventing air from being injected into a blood vessel provided by an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of the explosion structure of a vascular sheath for preventing air from being injected into a blood vessel provided by an embodiment of the utility model;

[0021] Figure 3 A schematic cross-sectional view of a preventive valve in a vascular sheath for preventing air from being injected into a blood vessel provided in an embodiment of the utility model.

[0022] In the attached figure:

[0023] 1. Sheath;

[0024] 2. Hemostatic clip;

[0025] 3. Connect the hose;

[0026] 4. Filter;

[0027] 5. Preventive valve; 501. Valve body; 502. Connecting nozzle; 503. Telescopic sleeve; 504. Fixing plate; 505. Hard pipe; 506. Connecting head; 507. Valve plate; 508. Valve ball; 509. Spring; 510. Mounting plate; 511. Liquid outlet; 512. Limit block; 513. Through hole. DETAILED DESCRIPTION

[0028] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0029] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0030] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Example

[0033] The vascular sheath for preventing air from being injected into a blood vessel provided in this embodiment is as follows: Figure 1-Figure 3 As shown, it includes: a sheath 1 for extending into a blood vessel, a hemostatic clamp 2 is fixedly installed at the proximal end of the sheath 1, a connecting hose 3 connected to the inside of the hemostatic clamp 2 is fixedly installed at the side of the hemostatic clamp 2, and a preventive valve 5 is installed at the end of the connecting hose 3 away from the sheath 1.

[0034] The vascular sheath for preventing air injection into the blood vessel using the above technical solution is mainly composed of a sheath tube 1, a hemostatic clamp 2, a connecting hose 3 and a preventive valve 5. The arranged preventive valve 5 can prevent the patient's blood from flowing back through the connecting hose 3 when the syringe is removed, thereby avoiding blood loss in the patient.

[0035] Specifically, in the present embodiment, in order to realize the specific functions of the preventive valve 5, the preventive valve 5 provided includes a valve body 501, a valve plate 507, a mounting plate 510, a spring 509, a valve ball 508, a telescopic sleeve 503, a fixing plate 504 and a hard tube 505. The front end of the valve body 501 is integrally provided with a connecting nozzle 502 connected with the interior thereof, and one end of the connecting hose 3 away from the sheath tube 1 is fixedly plugged into the interior of the connecting nozzle 502. The valve plate 507 is fixedly mounted on the rear end of the valve body 501, and a through hole 513 is opened at the center of the valve plate 507. The mounting plate 510 is fixedly mounted on the interior of the valve body 501, the spring 509 is fixedly mounted on one side of the mounting plate 510 facing the valve plate 507, and the valve ball 508 is fixedly mounted on the spring 50 9 is away from the end of the mounting plate 510, and the valve ball 508 is pressed against the front end of the through hole 513 under the action of the spring 509, and the front end of the through hole 513 is closed, the front end of the telescopic sleeve 503 is sealed and fixedly installed on the rear end of the valve body 501, and the fixed plate 504 is sealed and fixedly installed on the rear end of the telescopic sleeve 503, the hard tube 505 is fixedly inserted at the center position of the fixed plate 504, and the front end of the hard tube 505 can extend into the through hole 513 and push the valve ball 508 out of the through hole 513, and a plurality of liquid outlet holes 511 are opened on the side wall of the hard tube 505 near the front end thereof, when the front end of the hard tube 505 pushes the valve ball 508 out of the through hole 513, the plurality of liquid outlet holes 511 can be communicated with the interior of the connecting nozzle 502.

[0036] The preventive valve 5 using the above technical solution is mainly composed of a valve body 501, a valve plate 507, a mounting plate 510, a spring 509, a valve ball 508, a telescopic sleeve 503, a fixing plate 504 and a hard tube 505. When in use, a syringe is connected to the rear end of the hard tube 505, and then the hard tube 505 is pushed toward the valve body 501 by the syringe, so that the front end of the hard tube 505 passes through the through hole 513 to push the valve ball 508 out of the through hole 513, so that the plurality of liquid outlet holes 511 on the side wall of the hard tube 505 are connected to the inside of the connecting nozzle 502, and the liquid can be directed toward the inside of the valve body 501. The medicine is injected, and the injected medicine enters the hemostatic clamp 2 through the connecting hose 3 and then enters the sheath 1, and finally enters the patient's blood vessel. When the injection of the medicine is completed, the hard tube 505 retreats under the action of the telescopic sleeve 503, and the valve ball 508 is pressed against the front end of the through hole 513 under the action of the spring 509, and the front end of the through hole 513 is closed. After the valve ball 508 is pressed against the front end of the through hole 513, that is, after the telescopic sleeve 503 is reset, the syringe can be removed. The whole operation process can effectively prevent the patient's blood from flowing back through the connecting hose 3 when the syringe is removed, and can avoid blood loss of the patient.

[0037] In addition, the telescopic sleeve 503 can effectively prevent the front end of the hard tube 505 from being contaminated, thereby effectively ensuring the cleanliness of the preventive valve 5 .

[0038] Specifically, in this embodiment, in order to facilitate the connection of the syringe, a connector 506 connected to the interior of the hard tube 505 is integrally provided at the rear end thereof, and the connector 506 is used to connect to the nipple at the front end of the syringe.

[0039] Specifically, in this embodiment, in order to prevent the hard tube 505 from being inserted too deeply into the through hole 513 and affecting the structural stability of the preventive valve 5, a limit block 512 is fixedly mounted on the hard tube 505, and the limit block 512 is located inside the telescopic sleeve 503. When the hard tube 505 moves toward the through hole 513, it can drive the limit block 512 to press against the rear side of the valve plate 507 to close the rear end of the through hole 513. This arrangement can prevent the injected medicine from flowing through the through hole 513 to the inside of the telescopic sleeve 503 when the medicine is injected into the interior of the valve body 501, thereby affecting the speed of drug administration.

[0040] Specifically, in this embodiment, in order to reduce the overall volume of the preventive valve 5, the mounting plate 510 is arranged close to the front end of the valve body 501. In order to ensure that the liquid outlet 511 can be connected with the interior of the connecting nozzle 502, the mounting plate 510 and the connecting nozzle 502 are provided with a connecting gap.

[0041] Specifically, in this embodiment, in order to facilitate observation of the position of the front end of the hard tube 505 inside the telescopic sleeve 503, the telescopic sleeve 503 is a transparent silicone corrugated telescopic sleeve.

[0042] Specifically, in this embodiment, in order to filter out the bubbles in the injected medicinal solution, a filter 4 is also installed on the connecting hose 3, and the filter 4 is arranged between the hemostatic clamp 2 and the preventive valve 5. The filter 4 can filter out the bubbles in the injected medicinal solution, and can prevent the bubbles in the medicinal solution from entering the sheath 1 through the connecting hose 3 and then entering the patient's blood vessels, thereby eliminating safety hazards.

[0043] It is worth noting that the filter 4 in this embodiment has the same structure as the infusion tube filter in the precision infusion set in the prior art, and has a semipermeable membrane inside its outer shell. The semipermeable membrane is a cellulose filter membrane that allows liquid to pass but not gas to pass. Therefore, the bubbles in the medicine solution can be filtered out, and the bubbles can be prevented from entering the human body during the injection of the medicine solution, thereby avoiding the adverse symptoms of air embolism that may occur in the patient, and also avoiding the occurrence of serious complications in the patient.

[0044] Specifically, in this embodiment, in order to facilitate observation of the internal conditions of the valve body 501 , the valve body 501 is configured as a transparent cylindrical plastic shell.

[0045] In summary, the vascular sheath for preventing air from being injected into a blood vessel provided in this embodiment has the following advantages:

[0046] The vascular sheath that prevents air from being injected into the blood vessel is provided with a preventive valve 5 which can prevent the patient's blood from flowing back through the connecting hose 3 when the syringe is removed, thereby avoiding blood loss in the patient. At the same time, it can prevent bubbles in the medicine from entering the sheath tube 1 through the connecting hose 3 and then entering the patient's blood vessels during the injection of the medicine, thereby eliminating safety hazards.

[0047] When in use, the sheath 1 is used to be inserted into the patient's blood vessel, and the hemostatic clamp 2 is used to be inserted into the guide wire. The guide wire can enter the deep of the patient's blood vessel along the sheath 1 to perform treatment-related operations. The connecting hose 3 is used to inject liquid medicine into the patient. The nipple at the front end of the syringe used to inject liquid medicine is inserted into the connecting head 506, and then the syringe is used to push the hard tube 505 toward the valve body 501, so that the front end of the hard tube 505 passes through the through hole 513 to push the valve ball 508 out of the through hole 513, so that the multiple liquid outlet holes 511 on the side wall of the hard tube 505 are connected with the interior of the connecting nozzle 502, and the liquid medicine can be injected toward the interior of the valve body 501, and the injected liquid medicine enters the hemostatic clamp through the connecting hose 3. 2 and then enter the sheath tube 1, and finally enter the patient's blood vessel. When the injection of the liquid medicine is completed, the hard tube 505 retreats under the action of the telescopic sleeve 503, and the valve ball 508 is pressed against the front end of the through hole 513 under the action of the spring 509, and the front end of the through hole 513 is closed. After the valve ball 508 is pressed against the front end of the through hole 513, that is, after the telescopic sleeve 503 is reset, the syringe can be removed. The whole operation process can effectively prevent the patient's blood from flowing back through the connecting hose 3 when the syringe is removed, and can avoid the patient's blood loss. At the same time, it can prevent the bubbles in the liquid medicine from entering the sheath tube 1 and then entering the patient's blood vessel through the connecting hose 3 during the injection of the liquid medicine, thereby eliminating safety hazards.

[0048] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A vascular sheath for preventing air from being injected into a blood vessel, characterized in that: include: A sheath tube (1) is used to extend into a blood vessel, wherein a hemostatic clamp (2) is fixedly mounted on the proximal end of the sheath tube (1), a connecting hose (3) connected to the inside of the hemostatic clamp (2) is fixedly mounted on the side of the hemostatic clamp (2), and a preventive valve (5) is mounted on one end of the connecting hose (3) away from the sheath tube (1).

2. The vascular sheath for preventing air from being injected into a blood vessel according to claim 1, characterized in that: The preventive valve (5) comprises a valve body (501), a valve plate (507), a mounting plate (510), a spring (509), a valve ball (508), a telescopic sleeve (503), a fixing plate (504) and a hard tube (505). The front end of the valve body (501) is integrally provided with a connecting nozzle (502) connected to the interior thereof. The end of the connecting hose (3) away from the sheath tube (1) is fixedly plugged into the interior of the connecting nozzle (502). The valve plate (507) is fixedly mounted at the rear end of the valve body (501), and a through hole (513) is opened at the center of the valve plate (507). The mounting plate (510) is fixedly mounted inside the valve body (501). The spring (509) is fixedly mounted on a side surface of the mounting plate (510) facing the valve plate (507). The valve ball (508) is fixedly mounted on an end of the spring (509) away from the mounting plate (510). The valve ball (508) is pressed against the front end of the through hole (513) under the action of the spring (509) to close the front end of the through hole (513); the front end of the telescopic sleeve (503) is sealed and fixedly installed on the rear end of the valve body (501); the fixed plate (504) is sealed and fixedly installed on the rear end of the telescopic sleeve (503); the hard tube (505) is fixedly inserted at the center position of the fixed plate (504); and The front end of the hard tube (505) can extend into the through hole (513) and push the valve ball (508) out of the through hole (513). A plurality of liquid outlet holes (511) are provided on the side wall of the hard tube (505) near the front end thereof. When the front end of the hard tube (505) pushes the valve ball (508) out of the through hole (513), the plurality of liquid outlet holes (511) can be connected to the interior of the connecting nozzle (502).

3. The vascular sheath for preventing air from being injected into a blood vessel according to claim 2, characterized in that: The rear end of the hard tube (505) is integrally provided with a connector (506) which is in communication with the interior thereof.

4. The vascular sheath for preventing air from being injected into a blood vessel according to claim 2, characterized in that: A limit block (512) is fixedly mounted on the hard tube (505), and the limit block (512) is located inside the telescopic sleeve (503). When the hard tube (505) moves toward the through hole (513), it can drive the limit block (512) to press against the rear side of the valve plate (507) to close the rear end of the through hole (513).

5. The vascular sheath for preventing air from being injected into a blood vessel according to claim 4, characterized in that: The mounting plate (510) is arranged close to the front end of the valve body (501), and a gap is provided between the mounting plate (510) and the connecting nozzle (502).

6. The vascular sheath for preventing air from being injected into a blood vessel according to claim 2, characterized in that: The telescopic sleeve (503) is a silicone corrugated telescopic sleeve.

7. The vascular sheath for preventing air from being injected into a blood vessel according to claim 1, characterized in that: A filter (4) is also installed on the connecting hose (3), and the filter (4) is located between the hemostatic clamp (2) and the preventive valve (5).

8. The vascular sheath for preventing air from being injected into a blood vessel according to claim 2, characterized in that: The valve body (501) is a transparent cylindrical plastic shell.

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