Anti-coagulation artery blood taking needle
By designing an anticoagulant arterial blood collection needle, accurate injection of heparin sodium and safe sealing of the needle tip were achieved, solving the problems of needle dulling and easy failure of heparin sodium, thus improving the convenience and safety of blood collection.
Patent Information
- Application Number
- CN202422482984.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-10-15
AI Technical Summary
In existing technologies, when medical staff use syringes to collect arterial blood, they need to draw in sodium heparin to prevent clotting, which causes the needle to become blunt when piercing the stopper, increasing the difficulty of blood collection. Furthermore, sodium heparin is prone to failure when exposed to air, affecting the accuracy of blood collection.
Design an anticoagulant arterial blood collection needle that uses a knob to drive a screw to directly inject heparin sodium into the outer tube. The heparin sodium is sealed with a spring and a sealing plate. A rubber stopper and a conical cap are used to prevent the needle from deviating, thus achieving accurate use of heparin sodium and safe sealing of the needle.
This solution addresses the issue of needles becoming blunt when puncturing the stopper of the medication vial, ensuring accurate dosage of heparin sodium, preventing heparin sodium from becoming ineffective, improving the convenience and safety of blood collection, and reducing the difficulty of skin puncture for patients.
Smart Images
Figure CN223504224U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of artery blood sampling, specifically relates to a prevent coagulation artery blood sampling needle. BACKGROUND
[0002] Artery blood sampling is a common blood sampling method in medical treatment, and the purposes of artery blood collection include monitoring respiratory function, diagnosing acid-base balance disorder, evaluating cardiovascular disease risk, diagnosing metabolic disease and evaluating kidney function. Before collecting artery blood, fasting and drinking should be prohibited for a period of time to accurately measure blood lipid indexes.
[0003] When medical staff perform artery blood sampling, sometimes a needle cylinder is needed to collect artery blood, and heparin sodium needs to be drawn into the needle cylinder before blood sampling to prevent coagulation, which makes blood sampling inconvenient for medical staff, and the needle of the needle cylinder becomes blunt after penetrating the rubber plug of the heparin sodium medicine bottle, which makes it difficult to puncture the skin of the patient during blood sampling. Therefore, it is urgent to design a prevent coagulation artery blood sampling needle to solve the above problems. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a prevent coagulation artery blood sampling needle to solve the above problems in the prior art.
[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0006] A prevent coagulation artery blood sampling needle, comprising an outer tube, an inner tube is inserted into the inner tube, an outer piston located in the inner tube is fixed at the top end of the inner tube, a nut is fixed in the inner tube, a screw rod is connected in the inner tube through threads, a knob is fixed at one end of the screw rod extending to the outside of the inner tube, an inner piston located in the inner tube is rotationally connected at the top end of the screw rod, and a guide sleeve is integrally formed at the top end of the inner tube.
[0007] Further, a plug-in tube is inserted into the inner tube of the guide sleeve, and a liquid outlet hole is formed in the outer wall of the plug-in tube.
[0008] Further, a blocking piece is fixed at the top end of the plug-in tube, a stop ring is fixed at the bottom end of the plug-in tube, a spring is sleeved outside the plug-in tube, and the spring is located between the stop ring and the inner wall of the top of the inner tube.
[0009] Further, a stop column is fixed on the inner wall of the top of the outer tube, and anti-slip particles are integrally formed on the outer wall of the outer tube.
[0010] Further, a connecting tube is integrally formed on the outer wall of the top of the outer tube, and a needle is sleeved outside the connecting tube.
[0011] Further, the needle is externally provided with a protective cap, the interior of the protective cap is embedded with a rubber plug, the interior of the rubber plug is provided with a plug hole, the needle is plugged into the interior of the plug hole, and the bottom of the protective cap is integrally formed with a conical cap.
[0012] Further, the outer wall of the outer piston is integrally formed with a sealing ring, and the bottom outer wall of the blocking sheet is fixed with a sealing ring.
[0013] In the above technical scheme, the anticoagulant arterial blood taking needle has the advantages that: the screw rod is driven to rotate by the knob, the screw rod drives the inner piston to discharge the heparin sodium in the inner tube into the outer tube, the heparin sodium does not need to be extracted from a medicine bottle by puncturing the rubber plug, the medical staff is more convenient when taking blood from the artery of a patient, the problem that the needle is blunt due to puncturing the rubber plug of the medicine bottle is effectively solved, and the amount of heparin sodium used is relatively accurate; the spring is arranged to apply elastic force to the plug-in pipe and the blocking sheet, so that the heparin sodium can be sealed in the inner tube in a natural state, and the heparin sodium is prevented from being invalid due to long-term contact with air; the rubber plug is sleeved on the outside of the needle, the sealing effect of the needle is achieved, the conical cap is arranged, the needle can be accurately inserted into the interior of the protective cap, and the phenomenon that the needle is inserted into the hand due to deviation from the protective cap is prevented. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.
[0015] Figure 1 The front view structure schematic diagram is provided for the anticoagulant arterial blood taking needle embodiment of the present application.
[0016] Figure 2 The cross-sectional structure schematic diagram is provided for the anticoagulant arterial blood taking needle embodiment of the present application.
[0017] Figure 3 The screw rod structure schematic diagram is provided for the anticoagulant arterial blood taking needle embodiment of the present application.
[0018] Figure 4 The A place enlarged structure schematic diagram is provided for the anticoagulant arterial blood taking needle embodiment of the present application.
[0019] Figure 5 The B place enlarged structure schematic diagram is provided for the anticoagulant arterial blood taking needle embodiment of the present application.
[0020] MARKED EXPLANATION:
[0021] 1 outer tube, 2 inner tube, 3 outer piston, 4 needle, 5 protective cap, 6 rubber plug, 7 insertion hole, 8 conical cap, 9 nut, 10 knob, 11 inner piston, 12 sealing ring, 13 guide sleeve, 14 insertion tube, 15 stop ring, 16 spring, 17 blocking piece, 18 liquid outlet hole, 19 sealing ring, 20 anti-skid particles, 21 connecting tube, 22 stop column, 23 screw rod, 24 limiting ring, 25 limiting column. DETAILED DESCRIPTION
[0022] In order to make the technical personnel in the art better understand the technical scheme of the utility model, the utility model will be further described in detail below with reference to the drawings.
[0023] As Figures 1-5 shown, the utility model discloses a kind of anticoagulation arterial blood taking needle, including outer tube 1, inner tube 2 is inserted in the inside of outer tube 1, the top of inner tube 2 is fixed with the outer piston 3 in the inside of outer tube 1, the inside of nut 9 is fixed in inner tube 2, the inside of nut 9 is connected with screw rod 23 by thread, one end of screw rod 23 extends to the outside of inner tube 2 and is fixed with knob 10, the top of screw rod 23 is rotatably connected with the inner piston 11 in the inside of inner tube 2, and the top of inner tube 2 is integrally formed with guide sleeve 13.
[0024] Specifically, in the embodiment, including outer tube 1, inner tube 2 is inserted in the inside of outer tube 1, the top of inner tube 2 is fixed with the outer piston 3 in the inside of outer tube 1, when pulling inner tube 2, so that the outer piston 3 can move in the inside of outer tube 1, and the outer wall of outer tube 1 has the scale of identifying capacity, the capacity of outer tube 1 is preferably 1ml, the inside of inner tube 2 is fixed with nut 9, the inside of nut 9 is connected with screw rod 23 by thread, one end of screw rod 23 extends to the outside of inner tube 2 and is fixed with knob 10, and knob 10 can be conveniently rotated to screw rod 23, the top of screw rod 23 is rotatably connected with the inner piston 11 in the inside of inner tube 2, and the space in the inner tube 2 of the top of inner piston 11 is filled with heparin sodium, by heparin sodium flowing into outer tube 1, prevent the arterial blood collected in outer tube 1 from coagulating, and the concentration of heparin sodium is the core of ensuring the correctness of arterial blood gas value. Excessive heparin sodium can cause dilution error, making PH value, PaO2 low, and PCO2 value high, and false hypocapnia occurs. Too little heparin sodium cannot play an anticoagulation role. According to the final concentration of heparin sodium in arterial blood gas recommended by International Federation of Clinical Chemistry (IFCC), the concentration of heparin sodium used in the application is preferably 50u / ml, the dose of heparin sodium is 0.2ml, screw rod 23 can drive inner piston 11 to move when rotating, the top of inner tube 2 is integrally formed with guide sleeve 13, and guide sleeve 13 makes inner tube 2 communicate with outer tube 1.
[0025] This utility model provides an anticoagulant arterial blood collection needle. The screw 23 is rotated by the knob 10, which drives the inner piston 11 to discharge the heparin sodium inside the inner tube 2 into the outer tube 1. There is no need to puncture the medicine bottle to extract the heparin sodium, which makes it more convenient for medical staff to collect blood from the patient's artery. It can effectively solve the problem of the needle 4 becoming blunt due to puncturing the medicine bottle stopper, and the amount of heparin sodium used is also more accurate.
[0026] In another embodiment of this utility model, a connector 14 is inserted into the inside of the guide sleeve 13. The outer wall of the connector 14 has a liquid outlet hole 18. When the liquid outlet hole 18 protrudes upwards from the guide sleeve 13, the heparin sodium inside the inner tube 2 can be discharged into the outer tube 1 through the liquid outlet hole 18 under pressure. When the liquid outlet hole 18 is inside the guide sleeve 13, the guide sleeve 13 is blocked. A sealing plate 17 is fixed to the top of the connector 14, and a retaining ring 15 is fixed to the bottom of the connector 14. The sealing plate 17 and the retaining ring 15 restrict the range of motion of the connector 14. A spring 16 is sleeved on the outside of the connector 14. The spring 16 is located between the retaining ring 15 and the top inner wall of the inner tube 2. The spring 16 applies elastic force to the retaining ring 15, causing the sealing plate 17 to be close to the guide sleeve 13 under normal conditions. The spring 16 applies elastic force to the connector 14 and the sealing plate 17. This allows heparin sodium to be sealed inside the inner tube 2 under natural conditions, preventing it from becoming ineffective due to prolonged contact with air. A baffle 22 is fixed to the inner wall of the top of the outer tube 1, which blocks the outer piston 3 and prevents all the heparin sodium flowing into the outer tube 1 from being squeezed out by the outer piston 3. The outer wall of the outer tube 1 is integrally formed with uniformly distributed anti-slip particles 20, which make it more stable for medical staff to hold the outer tube 1, thus facilitating puncture and blood collection from the patient's skin. A connecting tube 21 is integrally formed on the outer wall of the top of the outer tube 1, and a needle 4 is sleeved on the outside of the connecting tube 21. The outer tube 1 is connected to the needle 4 through the connecting tube 21. At the same time, the heparin sodium inside the inner tube 2 can be injected into the outlet hole 18 by inserting a capillary tube. During injection, the top of the insertion tube 14 needs to be pulled out from the guide sleeve 13 so that the outlet hole 18 is exposed to the guide sleeve 13.
[0027] In another embodiment of this utility model, a protective cap 5 is provided on the outside of the needle 4, and a rubber plug 6 is embedded inside the protective cap 5. An insertion hole 7 is provided inside the rubber plug 6. The needle 4 is inserted into the insertion hole 7, and the rubber plug 6 is fitted onto the outside of the needle 4 to achieve a sealing effect. A conical cap 8 is integrally formed at the bottom of the protective cap 5. The conical cap 8 allows the needle 4 to accurately pierce the inside of the protective cap 5, thereby preventing the needle 4 from deviating from the protective cap 5 and causing hand injury. Simultaneously, a limiting ring 24 is fixed to the needle 4, and a limiting post 25 is fixed to the inner wall of the conical cap 8. When the blood collection needle is not in use, the limiting post 25 blocks the limiting ring 24, thereby limiting the position of the needle 4 inserted into the insertion hole 7, ensuring the needle 4... It can be inserted precisely into the deepest part of the insertion hole 7; after blood collection, the needle 4 needs to be forcefully inserted into the insertion hole 7 so that the limiting post 25 cannot perform the limiting function after being damaged by external force. At this time, the needle 4 can pierce the rubber plug 6 in the insertion hole 7, so that the rubber plug 6 can completely wrap the puncture part of the needle 4. Because air entering the arterial blood will affect its measurement value, after the puncture part of the needle 4 is completely wrapped, it can prevent the residual air in the insertion hole 7 from entering the arterial blood of the needle 4; the outer wall of the outer piston 3 is integrally formed with a sealing ring 12, which makes the dynamic sealing effect between the outer piston 3 and the outer tube 1 better. The bottom outer wall of the sealing plate 17 is fixed with a sealing ring 19, which makes the sealing plate 17 able to seal the top of the guide sleeve 13 again.
[0028] Working principle: In use, first remove the protective cap 5 from the needle 4, so that the inside of the outer tube 1 is connected to the air through the needle 4. Hold the outer tube 1 in place by hand and pull the inner tube 2 away from the needle 4. The inner tube 2 drives the outer piston 3 to move, so that the outer piston 3 is located inside the bottom end of the outer tube 1. Then, keep the inner tube 2 fixed and rotate the screw 23 by the knob 10. The screw 23 drives the inner piston 11 to move upward, thereby increasing the pressure inside the inner tube 2. This pressure causes the insertion tube 14 to drive the retaining ring 15 to compress the spring 16. When the liquid outlet 18 on the outside of the insertion tube 14 is exposed, the pressure is increased. At 13:00, the sodium heparin inside the inner tube 2 flows into the outer tube 1 through the outlet hole 18. Then, the inner tube 2 is pressed into the outer tube 1 to moisten the inner wall of the outer tube 1 with sodium heparin. Excess sodium heparin is then discharged from the needle 4, leaving a predetermined amount of sodium heparin inside the outer tube 1. The medical staff can then puncture the patient's artery through the needle 4 and pull the inner tube 2 outward, causing the inner tube 2 to move the outer piston 3, thereby achieving the effect of arterial blood collection. Finally, the protective cap 5 is forcefully put back on the outside of the needle 4, and the blood collection needle is rubbed to mix the sodium heparin with the arterial blood evenly.
[0029] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. An anticoagulant arterial blood collection needle, characterized in that, The device includes an outer tube (1), an inner tube (2) inserted inside the outer tube (1), an outer piston (3) fixed at the top of the inner tube (2) inside the outer tube (1), a nut (9) fixed inside the inner tube (2), a screw (23) connected inside the nut (9) by a thread, a knob (10) fixed at one end of the screw (23) extending to the outside of the inner tube (2), an inner piston (11) rotatably connected at the top of the screw (23) inside the inner tube (2), and a guide sleeve (13) integrally formed at the top of the inner tube (2).
2. The anticoagulant arterial blood collection needle according to claim 1, characterized in that, The guide sleeve (13) is internally connected to a connector (14), and the outer wall of the connector (14) has a liquid outlet hole (18).
3. The anticoagulant arterial blood collection needle according to claim 2, characterized in that, The top end of the insertion tube (14) is fixed with a sealing plate (17), the bottom end of the insertion tube (14) is fixed with a retaining ring (15), and a spring (16) is sleeved on the outside of the insertion tube (14). The spring (16) is located between the retaining ring (15) and the top inner wall of the inner tube (2).
4. The anticoagulant arterial blood collection needle according to claim 1, characterized in that, The top inner wall of the outer tube (1) is fixed with a stop post (22), and the outer wall of the outer tube (1) is integrally formed with uniformly distributed anti-slip particles (20).
5. The anticoagulant arterial blood collection needle according to claim 1, characterized in that, The outer wall of the outer tube (1) is integrally formed with a connecting tube (21), and a needle (4) is sleeved on the outside of the connecting tube (21).
6. The anticoagulant arterial blood collection needle according to claim 5, characterized in that, The needle (4) is provided with a protective cap (5) on the outside, and a rubber plug (6) is embedded inside the protective cap (5). The rubber plug (6) is provided with an insertion hole (7) inside, and the needle (4) is inserted into the insertion hole (7). The bottom of the protective cap (5) is integrally formed with a conical cap (8).
7. The anticoagulant arterial blood collection needle according to claim 3, characterized in that, The outer wall of the outer piston (3) is integrally formed with a sealing ring (12), and the bottom outer wall of the sealing plate (17) is fixed with a sealing ring (19).