Disposable vein blood taking needle
By using the design of a venous puncture needle protective cover and a blood blocking cover in the venous blood collection needle, the problem of insufficient blood collection volume is solved, sufficient blood collection volume and accurate test results are achieved, and medical costs are reduced.
Patent Information
- Application Number
- CN202422402870.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-09-30
AI Technical Summary
When collecting blood with existing soft-connected venous blood collection needles, after the venous puncture needle is inserted into the blood vessel, blood does not flow into the soft tube, but gas flows into the blood collection tube first, resulting in insufficient blood collection volume, affecting the reliability of the test results, and increasing patient pain and medical costs.
A venipuncture needle protective cover is used. By inserting the cone of the blood blocking cover into the port of the venipuncture needle protective cover, the blood blocking cover is compressed to connect with the atmosphere, and the venous blood pressure is used to expel the gas in the blood collection needle to ensure that blood flows fully into the blood collection needle.
It effectively eliminates blood collection errors, avoids blood waste in patients, reduces medical costs, and improves the accuracy and safety of blood collection.
Smart Images
Figure CN223365553U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of blood collection instruments, in particular to a disposable venous blood collection needle. Background Art
[0002] At present, most hospitals use disposable venous blood collection needles / disposable safety venous blood collection needles to collect venous blood samples. These blood collection needles are divided into hard-connected and soft-connected (butterfly-wing needles). Hard-connected needles are rarely used in clinical practice because it is difficult to check the return of blood; soft-connected (butterfly-wing needles) connect the venous puncture needle and the docking needle tube (bottle puncture needle) through a transparent hose to facilitate the inspection of blood return and improve the success rate of puncture.
[0003] However, there is a problem with existing soft-connected blood collection needles: the connecting tube contains 0.2~0.3ml of space. When collecting blood, after the venous puncture needle is inserted into the blood vessel, the blood does not flow into the soft tube. Instead, the blood begins to flow out after the bottle stopper puncture needle is inserted into the blood collection tube. Therefore, after the blood collection tube is inserted, the gas in the soft tube flows into the blood collection tube first, and then the blood enters the blood collection tube. The gas in the blood collection needle cannot be discharged in advance, resulting in insufficient blood collection volume entering the blood collection tube, affecting the reliability of the test results, and even being identified as an unqualified specimen, requiring re-collection, thereby delaying diagnosis and treatment and increasing patient suffering.
[0004] At present, the latest industry standard "Collection and Processing of Blood Specimens for Clinical Chemistry Tests" (WS / T 225-2024) 4.1.2.2 e) which will be implemented on November 1, 2024 requires that "if a butterfly needle is used for venous blood collection, the lumen of the hose will affect the accuracy of the blood volume of the first tube. When the blue-capped sodium citrate blood collection tube is the first tube collected, the blood collector should use an additional sodium citrate blood collection tube without additives or pre-filled. The blood collection tube does not need to be filled and then discarded, and then normal blood collection should be carried out to ensure that the anticoagulant and blood in the sodium citrate blood collection tube can reach the specified ratio." This means that the first tube of blood sample is discarded, and subsequent blood samples are tested normally. This practice not only wastes the patient's blood, but also increases the medical cost of the blood collection tube. At the same time, it is easy to cause medical disputes due to patients' lack of understanding. Utility Model Content
[0005] In order to solve the above technical problems, the utility model provides a disposable venous blood collection needle, which uses a venous puncture needle protective cover to discharge the gas in the venous blood collection needle in advance, making venous blood collection more accurate.
[0006] To achieve this technical purpose, the utility model adopts the following scheme: a disposable venous blood collection needle, including a hose, a venous puncture needle, a venous puncture needle protective cover, a bottle stopper puncture needle and a blood blocking cover, the venous puncture needle and the bottle stopper puncture needle are respectively connected to the two ends of the hose, and the blood blocking cover is put on the outside of the bottle stopper puncture needle; the outer diameter of the blood blocking cover is the same as the inner diameter of the venous puncture needle protective cover, the outer end of the blood blocking cover is tapered and wraps the bottle stopper puncture needle, the venous puncture needle protective cover is inserted into the outside of the bottle stopper puncture needle, and the blood blocking cover is compressed, and part of the bottle stopper puncture needle is exposed in the venous puncture needle protective cover, which is used for exhausting the disposable venous blood collection needle.
[0007] Compared with the prior art, the beneficial effect of the present invention is that the present invention limits the inner diameter of the venous puncture needle protective sleeve to be the same as the outer diameter of the blood blocking sleeve. During the venous blood collection process, the venous puncture needle protective sleeve is removed and the venous puncture needle is inserted into the blood vessel of the blood collector. At this time, the venous puncture needle protective sleeve is picked up and aligned with the outer cone of the blood blocking sleeve so that the cone of the blood blocking sleeve is inserted into the port of the venous puncture needle protective sleeve. The venous puncture needle protective sleeve is continued to be pushed up and the blood blocking sleeve is squeezed to shrink. At this time, the bottle stopper puncture needle is partially exposed in the venous puncture needle protective sleeve and connected to the atmosphere. Through the venous blood pressure, blood naturally flows out to fill the venous blood collection needle until the gas in the blood collection needle is completely discharged. Then the venous puncture needle protective sleeve is evacuated, the blood collection tube is connected, and the blood sample is collected, eliminating the 0.2~0.3ml blood volume error in the venous blood collection needle, avoiding the waste of patient blood, and eliminating the need to waste pre-filled blood collection tubes. It also enables the venous puncture needle protective sleeve to play a greater role and reduce medical costs.
[0008] Furthermore, a handle is provided on the outer side wall of the venipuncture needle protective cover, which facilitates removal and avoids stabbing medical staff.
[0009] Furthermore, it also includes a needle seat, one end of the hose is connected to the needle seat, and the needle seat is connected to the bottle stopper puncture needle and the blood blocking sleeve; the other end of the hose is connected to a handheld handle, and the handheld handle is connected to the venous blood collection needle.
[0010] Furthermore, in an initial state, the venous puncture needle protective cover is clamped on the handheld handle and is covered on the outside of the venous puncture needle, and the length of the venous puncture needle protective cover is longer than the length of the venous puncture needle and the bottle stopper puncture needle. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a schematic diagram of the overall structure of the disposable venous blood collection needle provided by the utility model;
[0012] Figure 2 This is an exploded view of the disposable venous blood collection needle provided by the utility model;
[0013] Figure 3 A schematic diagram of the disposable venous blood collection needle provided by the present invention in use state 1;
[0014] Figure 4 A schematic diagram of the second usage state of the disposable venous blood collection needle provided by the utility model;
[0015] The markings in the figure are: 1. Hose; 2. Needle seat; 3. Bottle stopper puncture needle; 4. Blood blocking sleeve; 5. Handle; 6. Venous puncture needle; 7. Venous puncture needle protective sleeve; 8. Blood blocking sleeve protective sleeve. DETAILED DESCRIPTION
[0016] In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail through the following specific implementation methods, but the present invention is not limited thereto.
[0017] like Figure 1 and Figure 2 As shown, the utility model provides a disposable venous blood collection needle, including a hose 1, a needle seat 2, a bottle stopper puncture needle 3, a blood blocking sleeve 4, a blood blocking sleeve protective sleeve 8, a handheld handle 5, a venous puncture needle 6 and a venous puncture needle protective sleeve 7. One end of the hose 1 is connected to the needle seat 2, and the needle seat 2 is connected to one end of the bottle stopper puncture needle 3 and one end of the blood blocking sleeve 4. The outer end of the bottle stopper puncture needle 3 is used to insert the blood collection tube, and the blood blocking sleeve 4 is sleeved on the outside of the bottle stopper puncture needle 3 to wrap it for protection. The outer diameter of the blood blocking sleeve 4 is the same as the inner diameter of the venous puncture needle protective sleeve 7, and the outer end of the blood blocking sleeve 4 is set to a cone, and the cone is also sufficient to wrap the bottle stopper puncture needle 3. The outer side of the blood blocking sleeve 4 is covered with a blood blocking sleeve protective sleeve 8 to prevent the blood blocking sleeve 4 from being contaminated.
[0018] The other end of the hose 1 is connected to the handheld handle 5, which is connected to the venous puncture needle 6. The venous puncture needle protective sleeve 7 is plugged onto the outer edge of the handheld handle 5. The length of the venous puncture needle protective sleeve 7 is greater than the length of the venous puncture needle 6 and longer than the length of the bottle stopper puncture needle 3, ensuring that the venous puncture needle protective sleeve 7 wraps and protects the venous puncture needle 6. At the same time, when the gas in the venous blood collection needle is discharged, even if a drop of blood flows out, the blood flows into the lower part of the venous puncture needle protective sleeve 7, which can effectively prevent blood from dripping directly onto medical staff or other operating sterile sheets, bed sheets, white coats, etc., avoiding blood contamination. Preferably, the outer end of the venous puncture needle protective sleeve is 1 cm longer than the tip of the venous puncture needle pillow in the assembled state.
[0019] Instructions for use: Remove the venous puncture needle protective cover 7 and place it on the tray. Insert the venous puncture needle 6 into the vein of the blood donor and fix the handle 5 with adhesive tape. Remove the blood blocking cover 8. At this time, hold the needle holder 2 with one hand and pick up the venous puncture needle protective cover 7 on the tray with the other hand. Align it with the outer tapered part of the blood blocking cover 4 and push the venous puncture needle protective cover 7 upwards so that the tapered part of the blood blocking cover 4 is inserted into the port of the venous puncture needle protective cover 7. Figure 3 Continue to push the venous puncture needle protective cover 7 upwards, and the blood blocking cover 4 is compressed. Figure 4 As shown, the tip of the bottle stopper puncture needle 3 is exposed within the venous puncture needle protective cover 7, suspended in the air without contact with the inner wall of the venous puncture needle protective cover 7. The disposable venous blood collection needle is connected to the atmosphere. Due to venous blood pressure, blood naturally flows out of the venous blood collection needle until the air in the blood collection needle is completely expelled. Then, the venous puncture needle protective cover 7 is removed, the blood collection tube is connected, and a blood sample is collected.
[0020] In some preferred embodiments, the outer wall of the venous puncture needle protective cover 7 is provided with a hand-held portion, which is convenient for medical staff to take and avoid puncture injuries, and the operation is safe, flexible and convenient.
[0021] This utility model uses a venous puncture needle tube protective sleeve 7 to expel gas from the venous blood collection needle, effectively solving the problem of insufficient blood collection volume in the first blood sample due to the lancet's inability to vent during venous blood collection. This design not only facilitates operation but also simplifies the blood collection process, ensuring sufficient blood collection volume and accurate test results. This design has been clinically validated. This disposable venous blood collection needle has a simple structure, is easy to manufacture, has low production costs, and is simple to operate, making it conducive to market promotion and application.
[0022] Finally, it should be noted that the above-listed examples are only preferred embodiments of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and modifications fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.
Claims
1. A disposable venous blood collection needle, comprising a hose, a venous puncture needle, a venous puncture needle protective cover, a bottle stopper puncture needle and a blood blocking sleeve, wherein the venous puncture needle and the bottle stopper puncture needle are respectively connected to the two ends of the hose, and the blood blocking sleeve is sheathed on the outer side of the bottle stopper puncture needle; characterized in that: The outer diameter of the blood blocking sleeve is the same as the inner diameter of the venous puncture needle protective sleeve. The outer end of the blood blocking sleeve is tapered and wraps the bottle stopper puncture needle. The venous puncture needle protective sleeve is inserted into the outside of the bottle stopper puncture needle and compresses the blood blocking sleeve. Part of the bottle stopper puncture needle is exposed inside the venous puncture needle protective sleeve, which is used for exhausting the disposable venous blood collection needle. The outer wall of the venipuncture needle protective cover is provided with a handle for easy removal.
2. The disposable venous blood collection needle according to claim 1, characterized in that: It also includes a needle seat, one end of the hose is connected to the needle seat, and the needle seat is connected to the bottle stopper puncture needle and the blood blocking sleeve; the other end of the hose is connected to a handheld handle, and the handheld handle is connected to the venous blood collection needle.
3. The disposable venous blood collection needle according to claim 2, characterized in that: In the initial state, the venous puncture needle protective cover is clamped on the handheld handle and is covered on the outside of the venous puncture needle. The length of the venous puncture needle protective cover is longer than the length of the venous puncture needle and the bottle stopper puncture needle.