Puncture type artery blood sampling device suitable for being connected with disposable blood sampling needle

Abstract

The utility model relates to a pierceable artery blood sampling device suitable for being connected with a disposable blood sampling needle, which aims to solve the technical problems that the existing blood sampling device needs to be used for one test and examination of a patient but needs to be punctured twice and the operation is complicated, and adopts the technical scheme that the pierceable artery blood sampling device comprises a tail needle joint, a hose, a puncture needle head, a needle cylinder, a tail needle and a rubber sleeve, the tail needle connector is connected with the hose, the hose is connected with the puncture needle head, and the tail needle is arranged at the tail of the connector and sleeved with the rubber sleeve. The sealing cap comprises a shell, a rubber plug and a connector, a supporting base is arranged on the lower middle portion of the inner side wall of the shell, an edge is arranged on the outer circumference of the rubber plug, the rubber plug is arranged in the shell through matching of the edge and the supporting base, the annular columnar connector is arranged in the middle of the bottom of the shell and connected with the head of the needle cylinder in a clamped mode, and the tail needle stretches into and penetrates through the rubber plug from the upper end of the sealing cap. The needle cylinder extends into the needle cylinder. The original operation of pricking two needles can be completed by only one needle, so that the pain of a patient is relieved, and the workload of a nurse is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to an insertable arterial blood collection device suitable for connection with disposable blood collection needles. Background Technology

[0002] Blood tests play a vital role in disease diagnosis, treatment monitoring, and health assessment. Clinically, blood is collected via both arterial and venous blood collection.

[0003] In clinical practice, for patients with respiratory diseases, cardiovascular diseases, nervous system diseases, as well as those in intensive care and high-risk newborns, in addition to collecting venous blood for complete blood count, blood biochemistry tests and other specific examinations, it is also necessary to collect arterial blood for blood gas analysis at the same time to help doctors assess the patient's respiratory function, acid-base balance and oxygenation status.

[0004] The commonly used blood collection instruments for clinical venous blood collection are disposable blood collection needles and vacuum blood collection tubes.

[0005] A disposable blood collection needle consists of a puncture needle tip, needle holder, transparent tubing, connector, tail needle, and rubber sheath. The puncture needle at the tip is used to puncture a blood vessel; the transparent tubing connects to the tail needle, which is covered by a rubber sheath and used to insert into the rubber stopper of a vacuum blood collection tube. The negative pressure inside the tube draws blood into the tube, allowing for multiple tube collections without leakage in a single venipuncture. Finally, the collected blood tubes are sent to the laboratory for analysis.

[0006] The blood collection device used in clinical arterial blood sampling is an arterial blood collection device. Its main structure includes a straight needle for puncturing the artery, a needle hub, a syringe (containing heparin anticoagulant), a needle plug, a puncture-proof plastic block, and a sealing cap. After successful puncture, arterial blood flows into the syringe of the arterial blood collection device through pressure difference or suction. Then, the needle is discarded, the sealing cap is screwed on, and the syringe is sent directly to the laboratory for analysis.

[0007] Currently, a problem in clinical practice is that, due to limitations in blood collection equipment, the tail needle of a disposable blood collection needle cannot be connected to the syringe of an arterial blood collection device, and the needle hub of the straight needle of the arterial blood collection device cannot be directly connected to a vacuum blood collection tube. Therefore, if a patient needs to undergo arterial blood gas analysis and complete blood count (CBC) and blood biochemistry tests simultaneously, two needles are required—one for the artery and one for the vein. This increases both the patient's discomfort and the nurses' workload. This is especially challenging for critically ill patients with poor vascular conditions and premature infants.

[0008] In fact, both in theory and in practice, arterial blood can completely replace venous blood in completing various laboratory tests such as routine blood tests. However, due to differences in oxygen and carbon dioxide content, as well as acid-base balance, venous blood cannot replace arterial blood in blood gas analysis.

[0009] Therefore, in order to solve the problem of having to give patients two injections for a single test, some clinical nurses tried using disposable blood collection needles to perform arterial punctures and then inserting the tail needle of the needle directly into the syringe of the arterial blood collection device to collect arterial blood. Afterwards, they removed the tail needle of the disposable blood collection needle and connected it to a vacuum blood collection tube to complete the collection of other blood samples.

[0010] While this method can solve the problem of needing to prick patients one less time, the small opening of the arterial blood collection device and its incompatibility with the tail needle of the blood collection needle mean that another nurse is needed to help to squeeze and fix the tail needle during the blood collection process. This method not only makes the blood collection process more difficult, but also increases labor costs due to the need for two people to cooperate, and the risk of needlestick injury is also higher. Utility Model Content

[0011] The purpose of this invention is to solve the above-mentioned problems and provide an insertable arterial blood collection device suitable for connection with disposable blood collection needles.

[0012] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0013] A puncturable arterial blood collection device suitable for connection to a disposable blood collection needle includes a tail needle connector, a tubing, a puncture needle, a syringe, a tail needle, and a rubber sleeve. The tail needle connector is connected to one end of the tubing, and the other end of the tubing is connected to the puncture needle. The tail needle is disposed at the tail of the tail needle connector, and the rubber sleeve is disposed at the tail of the tail needle connector and on the tail needle.

[0014] It also includes a sealing cap, which comprises a shell, a rubber stopper, and a connector. The shell is a frustum-shaped structure that is narrower at the top and wider at the bottom. A support seat with an upward-curving upper end is provided on the lower part of the inner wall of the shell. The outer circumference of the rubber stopper has a downward-facing edge. The rubber stopper is fitted inside the shell by engaging with the support seat through the edge. A cylindrical connector is provided in the middle of the bottom of the shell. A through hole matching the edge of the rubber stopper is opened in the middle of the support seat. The rubber stopper is placed in the through hole. The connector engages with the syringe connector. The tail needle extends from the upper end of the sealing cap, passes through the rubber stopper, and extends to the connector at the lower end.

[0015] Furthermore, the top surface of the rubber stopper is provided with a ball-shaped marking and limiting groove.

[0016] Furthermore, a support plate is provided on the upper part of the inner sidewall of the outer shell, and a central hole is provided in the middle of the support plate.

[0017] Furthermore, a needle holder is provided on one side of the tail end of the puncture needle.

[0018] Furthermore, the length of the tail pin is greater than the distance between the support plate and the upper end of the connector.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. This utility model can complete the operation that originally required two injections for the patient with only one injection, which reduces the patient's pain and the workload of the nurse.

[0021] 2. This utility model eliminates the need to discard the straight needle and replace the sealing cap after collecting arterial blood; instead, the sample can be sent directly with the sealing cap on, reducing operational steps and specimen contamination rate.

[0022] 3. This utility model can be operated by one nurse, is simple to operate, has a high safety factor, saves labor costs, and reduces the risk of needlestick injuries;

[0023] 4. The puncture needle of this utility model has a side-wing needle holder, which is more in line with the operating habits of nurses than the straight needle of the arterial blood collection device, and the success rate of arterial blood collection is higher.

[0024] 5. The central hole on the upper support plate and the marking and limiting groove in the middle of the rubber plug of this utility model can facilitate the nurse to accurately position the tail needle when inserting it, ensuring that the tail needle can be inserted accurately and will not be misaligned. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the cross-sectional structure of the sealing cap of this utility model;

[0026] Figure 2 This is a schematic diagram of the assembly structure of this utility model;

[0027] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure;

[0028] Figure 4 for Figure 3 A magnified schematic diagram of the upper part of the structure;

[0029] Figure 5 This is a schematic diagram of the tail pin and rubber sleeve structure of this utility model;

[0030] In the diagram: 1. Sealing cap; 2. Tail needle connector; 3. Tube; 4. Puncture needle; 5. Needle holder; 6. Syringe; 7. Tail needle; 8. Rubber sleeve;

[0031] 1.1 Outer shell; 1.2 Support base; 1.3 Rubber plug; 1.4 Support plate; 1.5 Center hole; 1.6 Marking and limiting groove; 1.7 Connector. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] like Figure 1-5 As shown, an insertable arterial blood collection device suitable for connection to a disposable blood collection needle includes a tail needle connector 2, a flexible tube 3, a puncture needle 4, a syringe 6, a tail needle 7, and a rubber sleeve 8. The tail needle connector 2 is connected to one end of the flexible tube 3, and the other end of the flexible tube 3 is connected to the puncture needle 4. A needle holder 5 is provided on one side of the tail of the puncture needle 4. The tail needle 7 is disposed at the tail of the tail needle connector 2, and the rubber sleeve 8 is sleeved on the tail of the tail needle connector 2 and on the tail needle 7.

[0034] It also includes a sealing cap 1, which comprises a shell 1.1, a rubber plug 1.3, and a connector 1.7. The shell 1.1 is a frustum-shaped structure that is narrower at the top and wider at the bottom. A support plate 1.4 is provided on the upper part of the inner wall of the shell 1.1, and a central hole 1.5 is provided in the middle of the support plate 1.4. A support seat 1.2 with an upward-curving upper end is provided on the lower part of the inner wall of the shell 1.1. The outer circumference of the rubber plug 1.3 is provided with a downward-facing edge, and a ball-shaped marking and limiting groove 1.6 is provided in the middle of the top surface. The rubber plug 1.3 is open to... The edge of the connector 1.2 is fitted inside the outer shell 1.1. The bottom center of the outer shell 1.1 is provided with a cylindrical connector 1.7. The support 1.2 has a through hole in the middle that matches the edge of the rubber plug 1.3. The rubber plug 1.3 is placed in the through hole. The connector 1.7 is engaged with the head of the syringe 6. The length of the tail needle 7 is greater than the distance between the support plate 1.4 and the upper end of the connector 1.7. It extends from the upper end of the sealing cap 1, passes through the support plate 1.4 and the rubber plug 1.3, and the lower end extends into the connector 1.7.

[0035] The working process of this utility model:

[0036] In use, the nurse first connects the sealing cap to the syringe for later use. Then, holding the needle holder 5 of the disposable blood collection needle with one hand, the nurse inserts the puncture needle 4 into the patient's artery. After securing the puncture needle 4, the nurse holds the sealing cap 1 and inserts the tail needle 7 from the top of the sealing cap 1, through the central hole 1.5, and through the middle of the marking and limiting groove 1.6 into the rubber stopper 1.3. The needle then passes through the connector 1.7 and extends into the syringe 6. At this time, the rubber sleeve 8 is blocked by the rubber stopper 1.3 and is lifted up, accumulating. Within the marked limiting groove 1.6, blood flows sequentially through the puncture needle 4, tubing 3, tail needle connector 2, and tail needle 7 into the syringe 6 via pressure difference or the action of the aspiration needle plug. After blood collection, the tail needle 7 is withdrawn, and the rubber sleeve 8 springs back, encasing the tail needle 7 to prevent leakage and contamination. After the tail needle 7 is withdrawn, the hole pierced by the tail needle 7 in the rubber stopper 1.3 is elastically sealed, thus sealing and protecting the head of the syringe 6. At this point, arterial blood collection is complete, and the syringe 6 and sealing cap 1 are sent for testing together. If other tests are required simultaneously, the tail needle 7 can be inserted into a vacuum blood collection tube to complete the collection of other blood samples, and the collected test tube can then be sent for testing. This invention requires only one needle to complete the procedure that previously required two needles, thus reducing patient discomfort and the workload of nurses.

Claims

1. A punctureable arterial blood collection device suitable for connection to a disposable blood collection needle, comprising a tail needle connector (2), a flexible tube (3), a puncture needle (4), a syringe (6), a tail needle (7), and a rubber sleeve (8), wherein the tail needle connector (2) is connected to one end of the flexible tube (3), the other end of the flexible tube (3) is connected to the puncture needle (4), the tail needle (7) is disposed at the tail of the tail needle connector (2), and the rubber sleeve (8) is sleeved on the tail of the tail needle connector (2) and on the tail needle (7); characterized in that It also includes a sealing cap (1), which includes a shell (1.1), a rubber plug (1.3) and a connector (1.7). The shell (1.1) is a frustum-shaped structure that is narrow at the top and wide at the bottom. A support seat (1.2) with an upturned top is provided on the lower part of the inner wall of the shell (1.1). The outer circumference of the rubber plug (1.3) is provided with a downward edge. The rubber plug (1.3) is set inside the shell (1.1) by cooperating with the support seat (1.2) through the edge. A cylindrical connector (1.7) is provided in the middle of the bottom of the shell (1.1). A through hole matching the edge of the rubber plug (1.3) is opened in the middle of the support seat (1.2). The rubber plug (1.3) is placed in the through hole. The connector (1.7) is engaged with the head of the syringe (6). The tail needle (7) extends from the upper end of the sealing cap (1), passes through the rubber plug (1.3), and extends to the connector (1.7) at the lower end.

2. The puncturable arterial blood sampling device suitable for connection with a disposable lancet according to claim 1, characterized in that, The top surface of the rubber stopper (1.3) is provided with a ball-shaped marking and limiting groove (1.6).

3. The puncturable arterial blood sampling device for use with a disposable lancet according to claim 1, wherein, The upper part of the inner wall of the outer shell (1.1) is provided with a support plate (1.4), and a central hole (1.5) is provided in the middle of the support plate (1.4).

4. The puncturable arterial blood sampling device for use with a disposable lancet according to claim 1, wherein, The puncture needle (4) has a needle holder (5) on one side of its tail.

5. A puncture-type arterial blood collection device suitable for connection to a disposable blood collection needle according to claim 1, characterized in that, The length of the tail pin (7) is greater than the distance between the support plate (1.4) and the upper end of the connector (1.7).

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