Needle tube integrated blood specimen collector for hemodialysis

Abstract

The utility model discloses a needle tube integral type blood specimen collector for hemodialysis belongs to medical instrument technical field, including vacuum blood collecting tube, set up the opening at the tail part of vacuum blood collecting tube, set up the rubber plug for sealing the opening at the opening, the head of vacuum blood collecting tube sets up the sleeve, and the sleeve is used for with the outside circulation pipeline blood sampling port plug -in connection, sets up the blood taking needle assembly in the inside of sleeve, and blood taking needle assembly includes needle body, fixed base and rubber cover, and needle body passes through fixed base and is fixedly connected with fixed base, and fixed base is fixedly connected with the head of vacuum blood collecting tube, and the needle head of needle body is located in the inside of sleeve, and the needle tail of needle body passes through the head of vacuum blood collecting tube and is located in the inside of vacuum blood collecting tube, and rubber cover is used for wrapping the needle head in the inside of sleeve and makes the needle head be in sealed state, the utility model discloses the blood taking needle and vacuum blood collecting tube integration fusion as integral type structure, and simple, convenient to use has avoided the security risk caused because of blood taking needle to stab into too deep or stab into improper.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a blood sample collection device with an integrated needle tube for hemodialysis. Background Technology

[0002] Hemodialysis is primarily used to treat patients with acute or chronic renal failure caused by related diseases. The process involves drawing blood from the patient's body and placing it into a dialyzer composed of numerous hollow fibers. Within this device, blood and dialysate exchange substances through diffusion, ultrafiltration, adsorption, and convection within the hollow fibers. This process effectively removes metabolic waste, maintains electrolyte and acid-base balance, and eliminates excess water. The purified blood is then returned to the patient. Regular hemodialysis treatment helps maintain stable vital signs, buying time for subsequent treatments. During hemodialysis treatment, monitoring the patient's vital signs and dialysis effectiveness allows for timely optimization. Treatment plans typically require collecting blood samples before and after dialysis for testing to ensure patients receive adequate and effective hemodialysis treatment. Currently, in clinical blood sample collection in hemodialysis units, a blood collection needle is usually connected to the blood collection port of the extracorporeal circulation tubing, and then a vacuum blood collection tube is used to draw the blood sample. Because the diameter of the extracorporeal circulation tubing and the size of the blood collection port are relatively small, medical staff need to be very careful during the operation to ensure that the insertion angle and depth of the blood collection needle are correct, avoiding damage to the extracorporeal circulation tubing due to deviation in the insertion angle or excessive insertion depth. In addition, the blood collection needles currently used in hemodialysis units are usually conventional blood collection needles with relatively long needle bodies, which increases the difficulty of inserting the needle into the blood collection port of the extracorporeal circulation tubing and also increases the risk of needle stick injuries to medical staff. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides an integrated blood sample collection device with a syringe for hemodialysis.

[0004] The technical solution of this utility model is as follows:

[0005] An integrated blood sample collector for hemodialysis includes a vacuum blood collection tube with an opening at its tail and a rubber stopper for sealing the opening. A cannula is provided at the head of the vacuum blood collection tube for connecting to a blood collection port of an extracorporeal circulation (ECB) line, with the ECB blood collection port inserted inside the cannula. A blood collection needle assembly is disposed inside the cannula for inserting into the ECB blood collection port. The blood collection needle assembly includes a needle body, a fixing base, and a rubber sleeve. The needle body passes through and is fixedly connected to the fixing base, which is fixedly connected to the head of the vacuum blood collection tube. The needle tip of the needle body is located inside the cannula, and the needle tail of the needle body passes through the head of the vacuum blood collection tube and is located inside the vacuum blood collection tube. The rubber sleeve covers the needle tip located inside the cannula and seals the needle tip.

[0006] As a preferred embodiment of this invention, the length of the sleeve is greater than the length of the needle inside the sleeve, to prevent the needle and rubber sleeve from protruding from the sleeve, thus providing a certain degree of protection for the needle and rubber sleeve.

[0007] As a preferred embodiment of this invention, the cannula is made of transparent plastic material, which allows observation of the needle and rubber sleeve inside the cannula and ensures the stability of the connection between the cannula and the blood collection port of the extracorporeal circulation tubing.

[0008] As a preferred embodiment of this invention, the rubber sleeve is fixedly connected to the fixing base to reduce the risk of the rubber sleeve falling off and to ensure the sealing performance of the rubber sleeve.

[0009] As a preferred embodiment of this invention, a tail cap is provided at the tail end of the vacuum blood collection tube to protect the opening at the tail end of the vacuum blood collection tube and prevent contamination of the opening at the tail end of the vacuum blood collection tube during blood collection and transfer.

[0010] As a preferred embodiment of this invention, the tail cap is inserted into the outer circumferential surface of the rubber plug at the opening of the vacuum blood collection tube, making it convenient for laboratory personnel to remove the tail cap.

[0011] As a preferred embodiment of this utility model, the sleeve is connected by an insert or threaded cap to protect the sleeve and the needle and rubber sleeve inside the sleeve, and also to seal the sleeve.

[0012] The advantages of this utility model are:

[0013] Integrating the blood collection needle and vacuum blood collection tube into a single structure reduces medical waste, is simple and convenient to use, and facilitates blood sample collection by hemodialysis staff at the blood collection port of the extracorporeal circulation tubing. Moreover, the blood collection needle is never exposed, improving safety and avoiding safety hazards caused by excessive or improper insertion of the blood collection needle. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a front view structural diagram of the present invention;

[0016] Figure 3 This is a schematic diagram of the present invention when it is not connected to the blood collection port of the extracorporeal circulation pipeline;

[0017] Figure 4 This is a schematic diagram of the present invention connected to the blood collection port of the extracorporeal circulation pipeline;

[0018] Figure 5 yes Figure 4 Enlarged diagram of point A in the diagram;

[0019] Figure 6 yes Figure 4 Enlarged diagram of point B in the image.

[0020] Meaning of the reference numerals in the diagram:

[0021] 1-Vacuum blood collection tube, 2-Rubber stopper, 3-Cannula, 4-Blood collection port of extracorporeal circulation tubing;

[0022] 5-Tail cap, 6-Head cap, 11-Needle body, 12-Fixing base, 13-Rubber sleeve. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1-6 As shown, this embodiment is a blood sample collector with an integrated needle tube for hemodialysis, including a vacuum blood collection tube 1. The vacuum blood collection tube 1 is made of transparent PET plastic. An opening is provided at the tail of the vacuum blood collection tube 1, and a rubber plug 2 is provided at the opening for sealing the opening. A sleeve 3 is provided at the head of the vacuum blood collection tube 1. The sleeve 3 is used to connect to the blood collection port 4 of the extracorporeal circulation tubing, and the blood collection port 4 of the extracorporeal circulation tubing is inserted into the sleeve 3. A blood collection needle assembly is provided inside the sleeve 3. The blood collection needle assembly is used to pierce the blood collection port 4 of the extracorporeal circulation tubing. The blood collection needle assembly includes a needle body 11, a fixing seat 12, and a rubber sleeve 13. The needle body 11 passes through the fixing seat 12 and is fixedly connected to the fixing seat 12. The fixing seat 12 is fixedly connected to the head of the vacuum blood collection tube 1. The needle tip of the needle body 11 is located inside the cannula 3, and the needle tail of the needle body 11 passes through the head of the vacuum blood collection tube 1 and is located inside the vacuum blood collection tube 1. The rubber sleeve 13 is used to wrap the needle tip located inside the cannula 3 and keep the needle tip in a sealed state. The rubber sleeve 13 is fixedly connected to the fixing seat 12 to reduce the risk of the rubber sleeve 13 falling off and to ensure the sealing performance of the rubber sleeve 13.

[0025] like Figure 3 As shown, in this embodiment, the length of the cannula 3 is greater than the length of the needle inside the cannula 3, to prevent the needle and rubber sleeve 13 from protruding from the cannula 3, so that the cannula 3 has a certain protective effect on the needle and rubber sleeve 13; in this embodiment, the cannula 3 is made of transparent plastic material, which can both observe the condition of the needle and rubber sleeve 13 inside the cannula 3 and ensure the stability of the cannula 3 and the blood collection port 4 of the extracorporeal circulation tubing; the transparent plastic material can be polyvinyl chloride (PVC) or polyethylene (PE).

[0026] like Figure 3 , 4 As shown in Figure 6, in this embodiment, a tail cap 5 is provided at the tail of the vacuum blood collection tube 1 to protect the opening at the tail of the vacuum blood collection tube 1 and prevent the opening at the tail of the vacuum blood collection tube 1 from being contaminated during blood collection and transfer. The tail cap 5 is inserted into the outer circumferential surface of the rubber plug 2 at the tail opening of the vacuum blood collection tube 1, making it easy for laboratory personnel to remove the tail cap 5.

[0027] like Figure 1 and 2 As shown, in this embodiment, a head cap 6 is inserted and connected to the sleeve 3, and the two have a tight fit to protect the sleeve 3 and the needle and rubber sleeve 13 inside the sleeve 3, and also to seal the sleeve 3; in practical applications, the head cap 6 and the sleeve 3 can also be connected by threads.

[0028] In use, unpack the package, take out the integrated blood sample collector for hemodialysis described in this embodiment, open the head cover 6, as shown in the example. Figure 3 As shown, the cannula 3 at the head of the vacuum blood collection tube 1 is connected to the blood collection port 4 of the extracorporeal circulation tubing, as follows. Figure 4 As shown, the retaining seat 12 located inside the cannula 3 serves as a limit to prevent the needle from being inserted too deeply. Simultaneously, with the cooperation of the cannula 3 and the extracorporeal circulation tubing blood collection port 4, the needle's insertion angle will not shift. During connection, the rubber sleeve 13 is deformed by the sealing element of the extracorporeal circulation tubing blood collection port 4, allowing the needle to penetrate the rubber sleeve 13 and enter the extracorporeal circulation tubing blood collection port 4 to form a passage. Figure 5As shown, blood flows into the vacuum blood collection tube 1 through the needle body 11 under the negative pressure of the vacuum blood collection tube 1. After the blood sample collection is completed, the cannula 3 at the head of the vacuum blood collection tube 1 is separated from the blood collection port 4 of the extracorporeal circulation tubing. The rubber sleeve 13 automatically rebounds and wraps around the needle to restore the needle to a sealed state, preventing blood from flowing out. Then, the head cap 6 is put back on the cannula 3, and the blood sample collection is completed. After the blood sample collection is completed, it is transferred to the laboratory. The laboratory personnel remove the tail cap 5 and use a syringe to insert into the vacuum blood collection tube 1 through the rubber stopper 2 at the tail opening of the vacuum blood collection tube 1. Then, the blood sample inside the vacuum blood collection tube 1 is extracted for testing. In this embodiment, the blood collection needle and the vacuum blood collection tube 1 are integrated into a single structure, which reduces medical waste, is simple and convenient to use, and is beneficial for hemodialysis medical staff to perform blood sample collection operations at the blood collection port 4 of the extracorporeal circulation tubing. Moreover, the blood collection needle is never exposed, which improves safety and avoids the safety hazards caused by the blood collection needle being inserted too deeply or improperly.

[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation", "connection", "setting", and "forming" should be interpreted broadly; for example, they can refer to fixed connection or setting, detachable connection or setting, or an integrated structure; they can refer to direct connection, indirect connection through an intermediate medium, or internal communication between two components; those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] The above embodiments are only used to illustrate the technical solutions of this utility model. Those skilled in the art should understand that the above embodiments do not limit this utility model in any way. All technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A blood sample collection device with an integrated needle and syringe for hemodialysis, characterized in that: The device includes a vacuum blood collection tube with an opening at its tail end and a rubber stopper for sealing the opening. A cannula is provided at the head of the vacuum blood collection tube for connecting to a blood collection port of an extracorporeal circulation (ECG) line, with the ECG blood collection port inserted inside the cannula. A blood collection needle assembly is disposed inside the cannula for inserting into the ECG blood collection port. The blood collection needle assembly includes a needle body, a fixing base, and a rubber sleeve. The needle body passes through and is fixedly connected to the fixing base, which is fixedly connected to the head of the vacuum blood collection tube. The needle tip of the needle body is located inside the cannula, and the needle tail of the needle body passes through the head of the vacuum blood collection tube and is located inside the vacuum blood collection tube. The rubber sleeve covers the needle tip located inside the cannula and seals the needle tip.

2. The integrated blood sample collection device for hemodialysis needles according to claim 1, characterized in that, The length of the cannula is greater than the length of the needle inside the cannula.

3. The integrated blood sample collection device for hemodialysis needles according to claim 1 or 2, characterized in that, The sleeve is made of transparent plastic material.

4. The integrated blood sample collection device for hemodialysis needles according to claim 1, characterized in that, The rubber sleeve is fixedly connected to the fixed base.

5. The integrated blood sample collection device for hemodialysis needles according to claim 1, characterized in that, The vacuum blood collection tube is equipped with a tail cap at its tail end.

6. The integrated blood sample collection device for hemodialysis needles according to claim 5, characterized in that, The tail cap is inserted into the outer circumference of the rubber plug at the tail opening of the vacuum blood collection tube.

7. The integrated blood sample collection device for hemodialysis needles according to claim 1, characterized in that, The sleeve is fitted with a head cap via an insert or threaded connection.

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