Aorta blood spray prevention perfusion needle

Abstract

The utility model provides an aorta blood spray prevention perfusion needle which comprises a guide tube with an opening at the tail end, a puncture needle arranged in the guide tube in a penetrating manner and used for assisting the guide tube to penetrate into the aorta and a three-way valve arranged at the top end of the guide tube, a limiting piece is arranged at the top of the three-way valve, and the puncture needle is arranged on the limiting piece in a telescopic penetrating manner. The side wall of the puncture needle is in closed contact with the limiting piece and can penetrate through the three-way valve along the limiting piece to extend into the guide tube, a containing cavity for containing the tip end of the puncture needle is formed in the limiting piece, and after the puncture needle shrinks, the tip end of the puncture needle can be reserved in the containing cavity of the limiting piece; the situation that blood is sprayed after the puncture needle is pulled out of the guide tube is avoided, the situation that an operator and an instrument nurse are accidentally injured due to the fact that the tip of the puncture needle is exposed outside is also avoided, opening and closing operation of the three-way valve is not hindered, and the operation process is smoother.

Description

Technical Field

[0001] The utility model relates to the technical field of aortic perfusion needles, in particular to an aortic blood spray-proof perfusion needle. Background Art

[0002] The aortic perfusion needle is a medical device used for extracorporeal circulation assisted treatment during cardiac surgery. It is mainly used to assist the perfusion of cardioplegia fluid and postoperative cardiac venting. The existing aortic perfusion needle is mainly composed of an iron puncture needle, a guide tube, and a three-way valve. After the guide tube is implanted in the aorta, the puncture needle needs to be pulled out. In the process of pulling out the puncture needle, there will be a certain gap between the puncture needle and the inner wall of the guide tube, and the three-way valve cannot be closed in time. It is inevitable that due to the high blood pressure in the aorta, blood will splash out along the guide tube of the aortic perfusion needle. The splashing blood will affect the surgical field of view and the progress of the operation. Utility Model Content

[0003] In view of this, it is necessary to provide an aortic anti-blood spray perfusion needle to solve the technical problems existing in the above-mentioned technology.

[0004] An aortic anti-blood-spraying perfusion needle comprises a guide tube with an opening at the tail end, a puncture needle inserted in the guide tube for assisting the guide tube to pierce the aorta, and a three-way valve arranged at the top end of the guide tube. A limiting member is arranged on the top of the three-way valve. The puncture needle is telescopically inserted on the limiting member. The side wall of the puncture needle is in airtight contact with the limiting member and can extend into the guide tube after passing through the three-way valve along the limiting member. A receiving cavity for accommodating the tip of the puncture needle is arranged in the limiting member. After the puncture needle is retracted, its tip can be retained in the receiving cavity of the limiting member.

[0005] Preferably, the diameter of the tip of the puncture needle is larger than the diameter of its needle body, and a limit ring is fixedly provided at the end of the accommodating cavity away from the three-way valve, the aperture of the limit ring matches the diameter of the needle body of the puncture needle, the needle body of the puncture needle is inserted into the limit ring, is in airtight contact with the limit ring, and can telescope along the limit ring in the direction of the guide tube.

[0006] Preferably, the length of the tip of the puncture needle is a preset length, and the depth of the receiving cavity matches the length of the tip of the puncture needle.

[0007] Preferably, the limit member is thread-tightly connected to the three-way valve.

[0008] Preferably, one end of the limiter away from the three-way valve is threadedly connected to the needle handle of the puncture needle.

[0009] Preferably, the tail end of the guide tube away from the three-way valve is the insertion end. After the puncture needle is inserted into the guide tube, the tip of the puncture needle can extend from the insertion end of the guide tube to assist the guide tube in puncturing the aorta.

[0010] Preferably, fixed wings are provided on the outer side walls on both sides of the piercing end of the guide tube, and the distance between the fixed wings and the opening of the piercing end of the guide tube is a preset distance.

[0011] Preferably, exhaust holes communicating with the inner cavity of the guide tube are provided on the outer side walls on both sides of the piercing end of the guide tube, and the exhaust holes are located between the fixed wings and the opening of the piercing end of the guide tube.

[0012] It can be seen from the above technical scheme that the present application provides an aortic anti-blood-spraying perfusion needle, comprising a guide tube with an opening at the tail end, a puncture needle inserted in the guide tube for assisting the guide tube to penetrate into the aorta, and a three-way valve arranged at the top end of the guide tube. A limiting member is arranged on the top of the three-way valve, and the puncture needle is retractably inserted on the limiting member. The side wall of the puncture needle is in airtight contact with the limiting member, and can extend into the guide tube after passing through the three-way valve along the limiting member. A receiving cavity for accommodating the tip of the puncture needle is arranged in the limiting member. When the puncture needle is retracted, its tip can be retained in the receiving cavity of the limiting member, thereby avoiding blood spraying after the puncture needle is pulled out of the guide tube, and also avoiding the tip of the puncture needle being exposed to the outside, causing accidental injury to the operator and the instrument nurse, and does not hinder the opening and closing operations of the three-way valve, so that the operation process is smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 It is an assembly schematic diagram of the utility model.

[0015] Figure 3 It is a schematic diagram of the structure of the puncture needle.

[0016] Figure 4 It is a schematic diagram of the internal structure of the limiting member.

[0017] In the figure: a guide tube 1, a puncture needle 2, a tip portion 21, a needle body 22, a needle handle 23, a three-way valve 3, a limiter 4, a rubber sealing plug 5, a limiter ring 6, a fixing wing 7, an exhaust hole 8, a receiving cavity 9, and a side port 31. DETAILED DESCRIPTION

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Please see Figure 1 and Figure 2 The utility model provides an aortic anti-blood-spraying perfusion needle, comprising a guide tube 1 with an opening at the tail end, a puncture needle 2 inserted in the guide tube 1 for assisting the guide tube 1 to pierce the aorta, and a three-way valve 3 arranged at the top end of the guide tube 1. The side port 31 of the three-way valve 3 is a perfusion interface for exhausting air and connecting an external myocardial protection liquid perfusion tube. The lower port of the three-way valve 3 is sealed and connected to the top end of the guide tube 1 and communicates with each other. The upper port on the top of the three-way valve 3 is provided with a limiter 4. The limiter 4 is a tubular structure, which is directly opposite to the guide tube 1. The stopper 4 and the three-way valve 3 are in a sealed connection and are interconnected. A rubber sealing plug 5 is fixedly arranged at the end of the stopper 4 away from the three-way valve 3, and the end is blocked by the rubber sealing plug 5 to form a closed end. The puncture needle 2 is a long iron puncture needle, which is inserted into the rubber sealing plug 5 and penetrates into the stopper 4 along the rubber sealing plug 5. The tip 21 of the puncture needle 2 faces the direction of the guide tube 1, and the puncture needle 2 can be extended along the stopper 4 toward the guide tube 1. The puncture needle 2 is contracted and extended through the three-way valve 3 into the interior of the guide tube 1. The tail end of the guide tube 1 is the insertion end. After the puncture needle 2 is extended into the guide tube 1, the tip 21 of the puncture needle 2 can extend from the insertion end of the guide tube 1 to assist the guide tube 1 in piercing the aorta. The stopper 4 is provided with a receiving cavity 9 for accommodating the tip 21 of the puncture needle 2. The receiving cavity 9 is connected to the upper port on the top of the three-way valve 3. When puncturing, the tip 21 of the puncture needle 2 is in a state of extending from the insertion end of the guide tube 1. When puncturing, the tip 21 of the puncture needle 2 is in a state of extending from the insertion end of the guide tube 1. The puncture needle 2 assists the guide tube 1 to pierce the aorta. After the puncture needle 2 is retracted backward, the tip 21 of the puncture needle 2 can be withdrawn to the receiving cavity 9 of the limiter 4 and retained in the receiving cavity 9. The needle body 22 of the puncture needle 2 and the rubber sealing plug 5 are airtightly penetrated without a gap between them. The rubber sealing plug 5 plays a sealing role, and blood will not overflow from the end of the limiter 4. After the tip 21 of the puncture needle 2 is withdrawn to the receiving cavity 9, it will not block the three-way valve 3 and will not hinder the operation of the three-way valve 3.

[0020] Please see Figure 3 and Figure 4Furthermore, the diameter of the tip 21 of the puncture needle 2 is larger than the diameter of its needle body 22, and a limiting ring 6 is fixedly arranged at the end of the accommodating cavity 9 away from the three-way valve 3. The aperture of the limiting ring 6 matches the diameter of the needle body 22 of the puncture needle 2 and is smaller than the diameter of the tip 21 of the puncture needle 2. The needle body 22 of the puncture needle 2 is penetrated by the limiting ring 6, and the puncture needle 2 can telescopically move along the limiting ring 6 toward the guide tube 1. The limiting ring 6 plays a limiting role, which is used to block the tip 21 of the puncture needle 2 from passing through, and can limit the puncture needle 2 from being pulled out of the accommodating cavity 9, thereby preventing the puncture needle 2 from being separated from the limiting member 4.

[0021] The length of the tip 21 of the puncture needle 2 is 5-7 mm. The length of the tip 21 of the puncture needle 2 extending from the insertion end of the guide tube 1 is adjusted according to the patient's age or the condition of the aorta, and is generally about 3-4 mm. The depth of the accommodating cavity 9 of the limiting member 4 is greater than the length of the tip 21 of the puncture needle 2, ensuring that the tip 21 of the puncture needle 2 can be completely accommodated in the accommodating cavity 9 when it is retracted into the accommodating cavity 9.

[0022] Please see Figure 2 In the above embodiment, the upper port on the top of the three-way valve 3 is provided with an external thread, and the lower port of the limiter 4 is provided with an internal thread matching the external thread of the three-way valve 3. The limiter 4 and the three-way valve 3 are connected by threaded cooperation and can be disassembled from each other. The interface after connection is in a closed state, and blood will not overflow from the connection.

[0023] Please see Figure 1 and Figure 2 In the above embodiment, the needle handle 23 of the puncture needle 2 is detachably connected to the top of the end of the limiter 4 away from the three-way valve 3 by a threaded connection. When performing the puncture operation, the threaded connection can limit the position of the puncture needle 2 to prevent the puncture needle 2 from retracting or returning, and the threaded connection can be used to adjust the length of the tip 21 of the puncture needle 2 extending out of the insertion end of the guide tube 1. During adjustment, the needle handle 23 is rotated according to the patient's age or the condition of the aorta to move it away from or close to the limiter 4, so as to adaptively adjust the extension length of the tip 21 of the puncture needle 2, thereby being able to meet the needs of different patients, effectively improving the versatility, and helping to reduce the difficulty of the operation.

[0024] Please see Figure 1 or Figure 2 Fixed wings 7 are provided on the outer side walls on both sides of the piercing end of the guide tube 1. The distance between the fixed wings 7 and the opening of the piercing end of the guide tube 1 is a preset distance. The fixed wings 7 and the guide tube 1 are integrally arranged. Exhaust holes 8 connected to the inner cavity of the guide tube 1 are also provided on the outer side walls on both sides opposite to the piercing end of the guide tube 1. The exhaust holes 8 are located between the fixed wings 7 and the opening of the piercing end of the guide tube 1.

[0025] The above disclosure is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims

1. An aortic anti-blood-spraying perfusion needle, comprising a guide tube with an opening at the tail end, a puncture needle inserted into the guide tube to assist the guide tube in piercing the aorta, and a three-way valve arranged at the top end of the guide tube, characterized in that: A limiting member is arranged on the top of the three-way valve, and the puncture needle is telescopically arranged on the limiting member. The side wall of the puncture needle is in airtight contact with the limiting member, and can pass through the three-way valve along the limiting member and extend into the guide tube. A receiving cavity for accommodating the tip of the puncture needle is arranged in the limiting member, and after the puncture needle is retracted, its tip can be retained in the receiving cavity of the limiting member.

2. The aortic blood spray prevention perfusion needle according to claim 1, characterized in that: The diameter of the tip of the puncture needle is larger than the diameter of its needle body. A limit ring is fixedly arranged at the end of the accommodating cavity away from the three-way valve. The aperture of the limit ring matches the diameter of the needle body of the puncture needle. The needle body of the puncture needle is inserted into the limit ring and is in airtight contact with the limit ring, and can telescope along the limit ring toward the direction of the guide tube.

3. The aortic blood spray prevention perfusion needle according to claim 2, characterized in that: The length of the tip of the puncture needle is a preset length, and the depth of the receiving cavity matches the length of the tip of the puncture needle.

4. The aortic blood spray prevention perfusion needle according to claim 3, characterized in that: The limiter is thread-tightly connected to the three-way valve.

5. The aortic blood spray prevention perfusion needle according to claim 4, characterized in that: One end of the limiting member away from the three-way valve is threadedly connected to the needle handle of the puncture needle.

6. The aortic blood spray prevention perfusion needle according to claim 1 or 5, characterized in that: The tail end of the guide tube away from the three-way valve is the insertion end. After the puncture needle is inserted into the guide tube, the tip of the puncture needle can extend from the insertion end of the guide tube to assist the guide tube in puncturing the aorta.

7. The aortic blood spray prevention perfusion needle according to claim 6, characterized in that: Fixed wings are arranged on the outer side walls on both sides of the piercing end of the guide tube, and the distance between the fixed wings and the opening of the piercing end of the guide tube is a preset distance.

8. The aortic blood spray prevention perfusion needle according to claim 7, characterized in that: Exhaust holes communicating with the inner cavity of the guide tube are also provided on the outer side walls on both sides of the piercing end of the guide tube. The exhaust holes are located between the fixed wings and the opening of the piercing end of the guide tube.

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