Anti-dislocation arterial puncture needle

Abstract

The present invention relates to the field of surgical technology, and specifically to an anti-disconnection arterial puncture needle, comprising a puncture handle, a catheter assembly, a needle core, an elastic excitation assembly, and a blood on-off structure; the catheter assembly comprises a connecting tube; a needle tube is coaxially fixed to the front end of the connecting tube; and an open groove is provided on the side wall of the needle core. After puncture, the elastic excitation assembly drives the needle core to move backward and be stored in the puncture handle, and the front end of the needle core is moved into the puncture handle, and the open groove is blocked to block the needle core carrying the patient's blood at the rear end of the puncture handle; when the needle tube enters the patient's arterial blood vessel and the puncture handle is pulled out of the connecting tube, medical staff are prevented from contacting the patient's blood carried on the needle core, thereby reducing the risk of infection for medical staff; at the same time, the needle core is caused to leave the needle tube by elastic excitation, which is not easy to cause shaking and cause the needle tube to slip out of the artery, thereby ensuring the accuracy of puncture.

Description

Technical Field

[0001] The invention relates to the field of surgical technology, and in particular to an anti-dislocation arterial puncture needle. Background Art

[0002] Arterial puncture needles are used to puncture and collect arterial blood samples, and to perform dynamic blood gas / electrolyte and arterial blood pressure monitoring on critically ill patients. This can not only obtain specimens in time and save time for rescue, but also avoid complications caused by local damage caused by repeated punctures, reduce patient pain, and facilitate rescue, treatment and dynamic observation of the condition. The arterial puncture needle consists of two structures: a needle tube and a needle core. When in use, remove the sheath outside the needle tube, and insert the needle tube and the needle core into the artery together. In order to ensure the accuracy of the arterial puncture position, the needle core needs to be set to a hollow shape, so that after the puncture needle is punctured to the position, the accuracy of the puncture position can be judged by observing the fluctuation of blood overflowing from the puncture needle.

[0003] After observing the blood flowing out of the puncture needle, it proves that the end of the puncture needle has penetrated the artery. Then, the medical staff needs to pull out the needle core and fix the needle tube. However, when the needle core is pulled out, the needle core carries the patient's blood, which may cause infection to the doctor or nurse who punctures, posing a certain risk. Summary of the invention

[0004] The present invention provides an anti-drop arterial puncture needle to solve the above problem.

[0005] The present invention provides an anti-dislocation arterial puncture needle, which adopts the following technical scheme: an anti-dislocation arterial puncture needle, comprising a puncture handle, a catheter assembly, a needle core, an elastic excitation assembly, and a blood on-off structure;

[0006] The puncture handle is a cylindrical shape arranged in front and behind the axis; a cap is fixed at the rear end of the puncture handle; the puncture handle is transparent;

[0007] The catheter assembly is arranged at the front side of the puncture handle, including a connecting tube; the connecting tube and the puncture handle are arranged coaxially; the rear end of the connecting tube is sleeved on the front end of the puncture handle; a needle tube is coaxially fixed to the front end of the connecting tube; the needle tube is a soft tube; the needle tube and the connecting tube are connected;

[0008] The needle core and the puncture handle are coaxially arranged; the needle core is slidably installed in the needle tube; the front end of the needle core extends to the front side of the needle tube; the rear end of the needle core passes through the connecting tube and extends into the puncture handle; the needle core is in a hollow tubular shape; the front end of the needle core is blocked; an opening groove is provided on the side wall of the needle core; the opening groove is at the front end of the needle core and at the front side of the needle tube;

[0009] The elastic excitation component is used to drive the needle core to move backward and be stored in the puncture handle after puncture, and to move the front end of the needle core into the puncture handle, and to seal the open groove, so that the needle core carrying the patient's blood is sealed at the rear end of the puncture handle; when the needle tube enters the patient's artery and the puncture handle is pulled out of the connecting tube, the medical staff is prevented from contacting the patient's blood carried on the needle core, thereby reducing the risk of infection for the medical staff; at the same time, the needle core is made to leave the needle tube by elastic excitation, which is not easy to cause the needle tube to slip out of the artery due to shaking, thereby ensuring the puncture accuracy;

[0010] The blood on-off structure is arranged in the connecting tube, and is used to seal the connecting tube when the puncture handle is pulled out of the connecting tube, so as to prevent the blood in the artery from flowing out through the connecting tube.

[0011] Furthermore, the elastic excitation component includes a retaining ring and a limiting structure;

[0012] The retaining ring is coaxially arranged in the puncture handle; the retaining ring divides the puncture handle into a front cavity and a rear cavity distributed front and back; the front cavity is located at the end of the puncture handle close to the connecting tube; the outer wall of the needle core and the inner wall of the retaining ring are sealed and slidable; the rear end of the needle core extends into the rear cavity; a rear spring is connected between the rear end of the retaining ring and the rear end of the needle core; a front spring is fixedly connected between the front end of the retaining ring and the cavity wall of the front cavity;

[0013] The limiting structure is arranged on the rear side of the retaining ring, and is used to limit the movement of the needle core in the puncture handle in the initial state, and to compress the front spring and the rear spring. After puncture, the limiting structure of the needle core is released, so that the rear spring releases force and extends, driving the needle core to move backward relative to the retaining ring until the retaining ring seals the opening groove, so as to seal the needle core carrying the patient's blood at the rear end of the puncture handle, and at the same time relax the front spring. When the blood in the patient's artery enters the front cavity and is driven by blood pressure, the retaining ring moves with the beating of the arterial blood, assisting medical staff in judging whether the needle tube has entered the arterial blood vessel during arterial puncture, and making observation more accurate.

[0014] Furthermore, the limiting structure includes a limiting hole; the limiting hole is arranged on the side wall of the puncture handle and is located at the rear side of the retaining ring; the thread in the limiting hole cooperates with a limiting column; the end of the limiting column close to the axis of the puncture handle extends into the puncture handle and abuts against the rear end of the needle core; the end of the limiting column away from the axis of the puncture handle extends outside the puncture handle; a rotating disk is fixed to the end of the limiting column away from the axis of the puncture handle. When it is necessary to release the limit on the needle core, the finger rubs the rotating disk to rotate the limiting column to drive the limiting column away from the needle core and detach from the needle core to release the limit on the needle core.

[0015] Furthermore, a plurality of friction protrusions are provided on the side wall of the turntable.

[0016] Furthermore, the blood on-off structure includes an on-off flap; there are two on-off flaps distributed along the circumference of the connecting tube; the on-off flaps are rubber flaps arranged at the front and back, and the rear end of the on-off flap is fixedly connected to the inner wall of the connecting tube; the two on-off flaps form a V-shape with the small end facing forward; before puncture, the front ends of the two on-off flaps abut against the outer wall of the needle core, and when the needle core is stored in the puncture handle, the front ends of the two on-off flaps abut against each other to close the connecting tube to prevent blood in the artery from flowing out through the connecting tube.

[0017] Furthermore, the front end of the puncture handle is tapered with the small end facing forward, so as to reduce the blood retained in the front cavity after the puncture handle is pulled out.

[0018] Furthermore, the edge of the front end of the needle tube is located at the notch of the opening groove, so that when the front end of the needle core is inserted into the artery, the blood in the artery enters the needle core from the opening groove in time, and then enters the puncture handle from the needle core, which is convenient for medical staff to observe in time and ensures the accuracy of the puncture process.

[0019] Furthermore, the needle core is made of metal.

[0020] Furthermore, the front end of the needle core is wedge-shaped with the small end facing forward, which is convenient for piercing the patient's blood vessel.

[0021] Furthermore, a first convex ring is fixed to the rear end of the outer wall of the connecting tube, and a second convex ring is fixed to the front end of the puncture handle; the first convex ring and the second convex ring are rubber rings, which are used to increase the friction between the puncture handle and the hand of the medical staff when pulling out the puncture handle, so as to facilitate pulling out the puncture handle.

[0022] The beneficial effects of the present invention are as follows: after puncture, the elastic excitation component drives the needle core to move backward and be stored in the puncture handle, and the front end of the needle core moves into the puncture handle, and the open groove is blocked, so that the needle core carrying the patient's blood is blocked at the rear end of the puncture handle; when the needle tube enters the patient's arterial blood vessel and the puncture handle is pulled out of the connecting tube, the medical staff is prevented from contacting the patient's blood carried on the needle core, thereby reducing the risk of infection for the medical staff; at the same time, the needle core is caused to leave the needle tube by elastic excitation, which is not easy to cause shaking and cause the needle tube to slip out of the artery, thereby ensuring the puncture accuracy.

[0023] Furthermore, after puncture, the limit on the needle core is released, the rear spring releases force and extends, driving the needle core to move backward relative to the baffle ring until the baffle ring seals the opening groove, so as to seal the needle core carrying the patient's blood at the rear end of the puncture handle, and at the same time relax the front spring. When the patient's arterial blood enters the front cavity and is driven by blood pressure, the baffle ring moves with the beating of the arterial blood, assisting medical staff in judging whether the needle tube has entered the arterial blood vessel during arterial puncture, and making observation more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 It is a structural schematic diagram of an embodiment of an anti-dislocation arterial puncture needle of the present invention;

[0026] Figure 2 A side view of an embodiment of an anti-dislocation arterial puncture needle of the present invention;

[0027] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0028] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0029] Figure 5 for Figure 3 Enlarged view of point C in the middle;

[0030] Figure 6 This is a state diagram of an embodiment of an anti-dislocation arterial puncture needle of the present invention when the needle core is stored in the puncture handle;

[0031] Figure 7 for Figure 6 Enlarged view of point D in the middle.

[0032] In the figure: 100, puncture handle; 110, cover cap; 210, connecting tube; 220, needle tube; 300, needle core; 310, opening groove; 410, retaining ring; 411, front cavity; 412, rear cavity; 420, front spring; 430, rear spring; 440, limiting column; 500, blood on-off structure; 610, first convex ring; 620, second convex ring. DETAILED DESCRIPTION

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of 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.

[0034] An embodiment of an anti-dislocation arterial puncture needle of the present invention is as follows Figures 1 to 7As shown: an anti-dislocation arterial puncture needle, including a puncture handle 100, a catheter assembly, a needle core 300, an elastic excitation assembly, and a blood on-off structure 500; the puncture handle 100 is a cylinder arranged before and after the axis; a cap 110 is fixed to the rear end of the puncture handle 100; the puncture handle 100 is transparent.

[0035] The catheter assembly is arranged at the front side of the puncture handle 100, including a connecting tube 210; the connecting tube 210 and the puncture handle 100 are arranged coaxially; the rear end of the connecting tube 210 is sleeved on the front end of the puncture handle 100; the front end of the connecting tube 210 is coaxially fixed with a needle tube 220; the needle tube 220 is a soft tube; the needle tube 220 and the connecting tube 210 are connected; the needle core 300 and the puncture handle 100 are arranged coaxially; the needle core 300 is slidably installed in the needle tube 220; the front end of the needle core 300 extends to the front side of the needle tube 220; the needle core 300 is made of metal. The front end of the needle core 300 is wedge-shaped with the small end facing forward, which is convenient for piercing the patient's blood vessels. The rear end of the needle core 300 passes through the connecting tube 210 and extends into the puncture handle 100; the needle core 300 is in a hollow tubular shape; the front end of the needle core 300 is blocked; an opening groove 310 is provided on the side wall of the needle core 300; the opening groove 310 is located at the front end of the needle core 300 and at the front side of the needle tube 220; the edge of the front end of the needle tube 220 is located at the notch of the opening groove 310. When the front end of the needle core 300 is inserted into the artery, the blood in the artery enters the needle core 300 from the opening groove 310 in time, and then enters the puncture handle 100 from the needle core 300, which is convenient for medical staff to observe in time and ensures the accuracy of the puncture process.

[0036] The elastic excitation component is used to drive the needle core 300 to move backward and be stored in the puncture handle 100 after puncture, and to move the front end of the needle core 300 into the puncture handle 100, and to block the opening groove 310, so as to block the needle core 300 carrying the patient's blood at the rear end of the puncture handle 100; when the needle tube 220 enters the patient's artery and the puncture handle 100 is pulled out of the connecting tube 210, the medical staff is prevented from contacting the patient's blood carried on the needle core 300, thereby reducing the risk of infection for the medical staff; at the same time, the needle core 300 is made to leave the needle tube 220 by means of elastic excitation, which is not easy to cause shaking and cause the needle tube 220 to slip out of the artery, thereby ensuring the accuracy of puncture.

[0037] The elastic excitation component includes a retaining ring 410 and a limiting structure; the retaining ring 410 is coaxially arranged in the puncture handle 100; the retaining ring 410 divides the puncture handle 100 into a front chamber 411 and a rear chamber 412 distributed front and back; the front chamber 411 is located at one end of the puncture handle 100 close to the connecting tube 210; the outer wall of the needle core 300 and the inner wall of the retaining ring 410 are sealed and slid; the rear end of the needle core 300 extends into the rear chamber 412; a rear spring 430 is connected between the rear end of the retaining ring 410 and the rear end of the needle core 300; a front spring 420 is fixedly connected between the front end of the retaining ring 410 and the cavity wall of the front chamber 411; the limiting structure is arranged at the rear side of the retaining ring 410, and is used to limit the initial state. The needle core 300 moves in the puncture handle 100, and the front spring 420 and the rear spring 430 are in a compressed state. After puncture, the limit of the needle core 300 is released, so that the rear spring 430 releases force and stretches, driving the needle core 300 to move back relative to the retaining ring 410 until the retaining ring 410 blocks the opening groove 310, so that the needle core 300 carrying the patient's blood is blocked at the rear end of the puncture handle 100, and the front spring 420 releases force and relaxes. When the patient's arterial blood enters the front cavity 411, and driven by blood pressure, the retaining ring 410 moves with the beating of the arterial blood, assisting medical staff to judge whether the needle tube 220 enters the arterial blood vessel during arterial puncture, and the observation is more accurate. In other embodiments, the front end of the puncture handle 100 is tapered with the small end facing forward. This is to reduce the blood retained in the front cavity 411 after the puncture handle 100 is pulled out.

[0038] The limiting structure includes a limiting hole; the limiting hole is arranged on the side wall of the puncture handle 100 and is located at the rear side of the retaining ring 410; the thread in the limiting hole cooperates with the limiting column 440; the end of the limiting column 440 close to the axis of the puncture handle 100 extends into the puncture handle 100 and abuts against the rear end of the needle core 300; the end of the limiting column 440 away from the axis of the puncture handle 100 extends outside the puncture handle 100; the end of the limiting column 440 away from the axis of the puncture handle 100 is fixed with a turntable. A plurality of friction protrusions are arranged on the side wall of the turntable. When it is necessary to release the limit of the needle core 300, the finger rubs the turntable to rotate the limiting column 440 to drive the limiting column 440 away from the needle core 300 and disengage from the needle core 300 to release the limit of the needle core 300.

[0039] The blood on-off structure 500 is arranged in the connecting tube 210, and is used to close the connecting tube 210 when the puncture handle 100 is pulled out of the connecting tube 210, so as to prevent the blood in the artery from flowing out through the connecting tube 210. The blood on-off structure 500 includes on-off flaps; there are two on-off flaps distributed along the circumference of the connecting tube 210; the on-off flaps are rubber flaps arranged in front and back, and the rear end of the on-off flaps is fixedly connected to the inner wall of the connecting tube 210; the two on-off flaps form a V shape with the small end facing forward; before puncture, the front ends of the two on-off flaps abut against the outer wall of the needle core 300, and when the needle core 300 is stored in the puncture handle 100, the front ends of the two on-off flaps abut against each other, closing the connecting tube 210, so as to prevent the blood in the artery from flowing out through the connecting tube 210.

[0040] In this embodiment, a first convex ring 610 is fixed to the rear end of the outer wall of the connecting tube 210; a second convex ring 620 is fixed to the front end of the puncture handle 100; the first convex ring 610 and the second convex ring 620 are rubber rings, which are used to increase the friction between the puncture handle 100 and the hand of the medical staff when pulling out the puncture handle 100, so as to facilitate pulling out the puncture handle 100.

[0041] In combination with the above embodiments, the use principle and working process of the present invention are as follows: when in use, first touch the strongest point of the radial artery pulsation point, perform puncture according to the shape of the radial artery, and when arterial blood is seen to be drawn out of the puncture handle 100, rub the turntable with your fingers to rotate the limit column 440 to drive the limit column 440 away from the needle core 300 and detach from the needle core 300, so as to release the limit on the needle core 300. The rear spring 430 releases force and extends, driving the needle core 300 to move backward relative to the retaining ring 410 until the retaining ring 410 blocks the opening groove 310, so as to block the needle core 300 carrying the patient's blood at the rear end of the puncture handle 100. When the puncture handle 100 is pulled out of the connecting tube 210, the medical staff is prevented from contacting with the patient's blood carried on the needle core 300, thereby reducing the risk of infection for the medical staff.

[0042] At the same time, the front spring 420 is released and relaxed. When the blood in the patient's artery enters the front chamber 411, the baffle ring 410 moves with the beating of the arterial blood under the drive of blood pressure, assisting medical staff in judging whether the needle tube 220 enters the artery during arterial puncture, and the observation is more accurate. The needle core 300 is separated from the needle tube 220 by elastic excitation, which is not easy to cause the needle tube 220 to slip out of the artery due to shaking, thereby ensuring the puncture accuracy.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-dislocation arterial puncture needle, characterized in that: It includes a puncture handle, a catheter assembly, a needle core, an elastic excitation assembly, and a blood on-off structure; The puncture handle is a cylindrical shape arranged in front and behind the axis; a cap is fixed at the rear end of the puncture handle; the puncture handle is transparent; The catheter assembly is arranged at the front side of the puncture handle, including a connecting tube; the connecting tube and the puncture handle are arranged coaxially; the rear end of the connecting tube is sleeved on the front end of the puncture handle; a needle tube is coaxially fixed to the front end of the connecting tube; the needle tube is a soft tube; the needle tube and the connecting tube are connected; The needle core and the puncture handle are coaxially arranged; the needle core is slidably installed in the needle tube; the front end of the needle core extends to the front side of the needle tube; the rear end of the needle core passes through the connecting tube and extends into the puncture handle; the needle core is in a hollow tubular shape; the front end of the needle core is blocked; an opening groove is provided on the side wall of the needle core; the opening groove is at the front end of the needle core and at the front side of the needle tube; The elastic excitation component is used to drive the needle core to move backward and be stored in the puncture handle after puncture, and to move the front end of the needle core into the puncture handle and seal the opening groove; the elastic excitation component includes a retaining ring and a limiting structure; the retaining ring is coaxially arranged in the puncture handle; the retaining ring divides the puncture handle into a front cavity and a rear cavity distributed front and back; the front cavity is located at one end of the puncture handle close to the connecting tube; the outer wall of the needle core and the inner wall of the retaining ring are sealed and slidable; the rear end of the needle core extends into the rear cavity; a rear spring is connected between the rear end of the retaining ring and the rear end of the needle core; A front spring is fixedly connected between the front end of the ring and the cavity wall of the front cavity; a limiting structure is arranged at the rear side of the retaining ring, and is used to limit the movement of the needle core in the puncture handle in the initial state, and to make the front spring and the rear spring in a compressed state. After puncture, the limiting of the needle core is released, so that the rear spring releases force and stretches, driving the needle core to move backward relative to the retaining ring until the retaining ring blocks the opening groove, and at the same time, the front spring releases force and relaxes. When the blood in the patient's artery enters the front cavity, and driven by the blood pressure, the retaining ring moves with the beating of the arterial blood; The blood on-off structure is arranged in the connecting tube, and is used to close the connecting tube when the puncture handle is pulled out of the connecting tube; the blood on-off structure includes on-off valves; there are two on-off valves distributed along the circumference of the connecting tube; the on-off valves are rubber valves arranged at the front and back, and the rear end of the on-off valve is fixedly connected to the inner wall of the connecting tube; the two on-off valves form a V shape with the small end facing forward; before puncture, the front ends of the two on-off valves abut against the outer wall of the needle core, and when the needle core is stored in the puncture handle, the front ends of the two on-off valves abut against each other to close the connecting tube.

2. The anti-dislocation arterial puncture needle according to claim 1, characterized in that: The limiting structure includes a limiting hole; the limiting hole is arranged on the side wall of the puncture handle and is located on the rear side of the retaining ring; the inner thread of the limiting hole cooperates with the limiting column; the end of the limiting column close to the axis of the puncture handle extends into the puncture handle and abuts against the rear end of the needle core; the end of the limiting column away from the axis of the puncture handle extends outside the puncture handle; a turntable is fixed to the end of the limiting column away from the axis of the puncture handle.

3. The anti-dislocation arterial puncture needle according to claim 2, characterized in that: A plurality of friction protrusions are arranged on the side wall of the rotating disk.

4. The anti-dislocation arterial puncture needle according to claim 2, characterized in that: The front end of the puncture handle is tapered with the small end facing forward.

5. The anti-dislocation arterial puncture needle according to claim 1, characterized in that: The edge of the front end of the needle tube is located at the notch of the opening groove.

6. The anti-dislocation arterial puncture needle according to claim 1, characterized in that: The needle core is made of metal.

7. The anti-dislocation arterial puncture needle according to claim 1, characterized in that: The front end of the needle core is in a wedge shape with the small end facing forward.

8. The anti-dislocation arterial puncture needle according to claim 1, characterized in that: A first convex ring is fixed at the rear end of the outer side wall of the connecting tube; a second convex ring is fixed at the front end of the puncture handle; the first convex ring and the second convex ring are rubber rings.

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