Arterial blood sample sampler
Through the two-stage rotary seal throwable design, the existing arterial blood sample sampler has solved the problem of detection error and sharp device injury risk, achieving convenient operation and reducing the risk of contamination.
Patent Information
- Application Number
- CN202420387845.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-29
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-02-28
AI Technical Summary
Existing arterial blood samplers can easily lead to detection errors and risk of sharp device injuries during blood drawing, and the structure is complex, making it difficult to ensure convenient operation and standardization.
A two-stage rotary sealed throwable arterial blood sample sampler is designed, including a first sampling tube and a second sampling tube, the inner wall is coated with a heparin layer, and the gas is removed in the first sampling tube through a push rod and the liquid is discarded to the first sampling tube. The double sampling tube ensures that the fixed volume is filled and sealed and discarded to avoid blood leakage and does not require a sharp device.
It reduces detection errors and sharp device injury risk, is convenient to operate and simple structure, and reduces the occurrence of blood specimen contamination and sharp device injury.
Smart Images
Figure CN222172130U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical equipment, in particular to an arterial blood sampler. Background Art
[0002] Clinically, some patients require frequent blood draws due to their medical conditions or require the placement of a radial or femoral artery catheter to monitor certain treatment parameters (such as PICCO placement). This component generally requires the connection of a sensor and a pressurizing device. The sensor includes a 2-3 meter long transparent infusion line and a sampling port for blood draws. The terminal of the sensor is connected to 250 ml of saline solution with sodium heparin added. The saline solution is inserted into the pressurizing device to maintain a certain pressure. This pressure is transmitted to the arterial end, thus maintaining the arterial indwelling state.
[0003] Arterial blood can be obtained from the sensor's sampling port (usually a three-way port). This process has certain specifications and requirements. The first liquid drawn using a blood gas needle or a conventional injection needle must be discarded (the liquid drawn at this time is a mixture of arterial blood and saline in the sensor). To ensure test accuracy, a volume of approximately 3 ml or more must be discarded. If the volume of this first discarded liquid is too small, the saline mixture will not meet the test standard, which may cause the test results of the second arterial blood sample to deviate significantly (for example, it may easily lead to extremely low results for acid or electrolytes in blood gas analysis). In addition, the process of directly discarding the mixed liquid from the blood gas needle or conventional injection needle can easily lead to contamination or splashing of bloody liquid, waste of conventional syringes and sharps, and increase the risk of sharps injuries during the operation (blood collection operations in patients with indwelling arterial catheters generally do not require needles or sharps). Therefore, a new sampler is needed that is more convenient to operate, has reasonable process standards, and reduces test deviations.
[0004] Patent application CN201910841840.3 discloses an arterial blood collection system, comprising an arterial blood collection element defining a collection chamber and an arterial blood module removably connectable to a portion of the arterial blood collection element, the arterial blood module comprising: a housing having a first end and a second end; a needle extending from the first end; a cap removably secured to the needle; a mixing chamber adjacent to the second end; and a safety shield engaged with a portion of the housing, the safety shield being capable of switching from a first shield position, in which a portion of the needle is exposed, to a second shield position, in which the needle is shielded by a portion of the safety shield. Although this technology can effectively collect arterial blood, it is complex in structure and contains sharp objects, which can easily cause sharp injuries. Utility Model Content
[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide an arterial blood sampler which is easy to operate, has small detection error, is standardized and reasonable, and can reduce the risk of sharp instrument injury and blood specimen contamination.
[0006] The purpose of the utility model can be achieved through the following technical solutions: an arterial blood sampler, which is a two-stage rotary sealed disposable sampler, including a first sampling tube and a second sampling tube, the first sampling tube and the second sampling tube are rotary sealed and connected, the bottom of the second sampling tube is provided with a first blood sampling port, the connecting surface of the first sampling tube and the second sampling tube is provided with a second blood sampling port, and the first sampling tube is provided with a push rod matching it.
[0007] Furthermore, the inner wall of the first sampling tube is coated with a heparin coating.
[0008] Furthermore, the first sampling tube and the push rod form a syringe structure. The push rod moves in the inner cavity of the first sampling tube to extract the air in the inner cavity of the second sampling tube, and draws the waste liquid into the second sampling tube to sample through the second blood sampling port.
[0009] Furthermore, the second blood sampling port at the bottom of the first sampling tube is equipped with a first cap. After sampling, the second sampling tube is discarded, and the second blood sampling port is sealed with the first cap before the sample is delivered.
[0010] Furthermore, the first sampling tube and the second sampling tube are combined into a whole through a spiral mouth structure to form a two-stage rotary sealed disposable sampler.
[0011] Furthermore, the second sampling tube is in the shape of a closed cylinder, with blood sampling ports provided on the top and bottom, and caps for sealing the blood sampling ports respectively.
[0012] Furthermore, the top and bottom of the second sampling tube are both provided with threads, which are threadedly connected to the cap.
[0013] Furthermore, the inner cavity volume of the second sampling tube is 3 mL to 10 mL.
[0014] Furthermore, the first blood sampling port of the arterial blood sampler matches the sampling port of the sensor for arterial blood sampling.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] In clinical practice, patients with retained arterial catheters have certain operating specifications and requirements when taking blood gas samples to reduce the error of the test results; and it is not necessary to use a sampling tube with a sharp object; the utility model designs a two-stage rotatable, airtight, disposable blood sample sampler that is not equipped with a sharp object (needle). It is easy to use, has reasonable specifications, and can also reduce the risk of sharp object injuries and blood sample contamination.
[0017] The arterial blood sample sampler of the present invention does not require sharp objects, which helps to reduce sharp object injuries; the two-stage design can standardize the requirements and procedures for taking arterial blood from an arterial catheter, and the push rod is moved in the first sampling tube to extract the gas in the inner cavity of the second sampling tube, and combined with the existing arterial blood sampling sensor, sampling, the liquid extracted for the first time is first filled in the inner cavity of the second sampling tube, because the inner cavity volume of the second sampling tube is fixed, it is avoided that the mixed liquid volume of the arterial blood discarded for the first time and the physiological saline in the sensor catheter is insufficient to cause excessive detection error; after the inner cavity of the second sampling tube is filled, it is removed, and both ends are covered with caps and discarded, avoiding the risk of leakage and splashing of the blood sample; then the second blood sampling port at the bottom of the first sampling tube is continued to be connected to the sampling port of the existing arterial blood sampling sensor, and the push rod is continued to be pulled to take samples. The method of use is simple and convenient, and it is clear at a glance. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic structural diagram of the arterial blood sampler of the utility model;
[0019] Figure 2 This is a schematic diagram of the structure of the first sampling tube after sampling;
[0020] Figure 3 This is a schematic diagram of the structure of the second sampling tube after sampling. DETAILED DESCRIPTION
[0021] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0022] Example
[0023] like Figure 1As shown, an arterial blood sampler includes a first sampling tube 1, a second sampling tube 2, and a push rod 3. The inner wall of the first sampling tube 1 is coated with a heparin coating. The push rod 3 is inserted into the inner cavity of the first sampling tube 1 from the top. The first sampling tube 1 and the push rod 3 form a syringe structure (which differs from a conventional syringe structure in that the bottom is flat and a second blood sampling port 5 is provided on the bottom plane). The first sampling tube 1 and the second sampling tube 2 are rotatably sealed and connected. Specifically, they can be connected by a threaded seal. In this embodiment, the bottom of the first sampling tube 1 is provided with an external thread, and the top of the second sampling tube 2 is provided with a matching internal thread 9, and the two are connected by a threaded seal. The second sampling tube 2 is generally in the shape of a closed cylinder. The top of the second sampling tube 2 is provided with a blood sampling port that matches and communicates with the second blood sampling port 5 at the bottom of the first sampling tube 1. The bottom of the second sampling tube 2 is provided with a first blood sampling port 4.
[0024] The second blood sampling port 5 at the bottom of the first sampling tube 1 is provided with a first cap 6, the bottom of the second sampling tube 2 is provided with an external thread and is provided with a second cap 7 sealed therewith, and the top is provided with an external thread 10 and is provided with a third cap 8 sealed therewith (see Figure 2-3 ).
[0025] During use, the second sampling tube 2 is threadedly connected to the bottom of the first sampling tube 1. The push rod 3 is moved inside the first sampling tube 1 to extract the gas in the inner cavity of the second sampling tube 2. Then, the first blood sampling port 4 at the bottom of the second sampling tube 2 is connected to the sampling port of an existing arterial blood sampling sensor (in this embodiment, a pressure sensor of US ICU 42584, 3ml, country code C14161100400000026780000014 is selected). The push rod 3 is pulled to take samples. The liquid extracted for the first time is first filled into the inner cavity of the second sampling tube 2. Since the inner cavity volume of the second sampling tube 2 is fixed, it can be a fixed volume or with a volume scale. The volume of liquid to be discarded can be extracted according to actual needs. If it is fixed, select the second sampling tube 2 with a fixed volume. If it is not fixed, select the second sampling tube 2 with a solvent scale. In this embodiment, the inner cavity volume of the second sampling tube 2 is fixed at 3 mL, so there are basically no requirements for the sampling personnel. They only need to fill the inner cavity of the second sampling tube 2, then seal and screw the second cap 7 on the bottom of the second sampling tube 2, and then unscrew the second sampling tube 2 from the bottom of the first sampling tube 1, cover it with the third cap 8, and then discard it, avoiding the risk of blood sample leakage and splashing when discarding the waste mixed blood sample.
[0026] After removing the second sampling tube 2, connect the second blood sampling port 5 at the bottom of the first sampling tube 1 to the sampling port of the sensor for arterial blood sampling, pull the push rod 3 to take samples, and after sampling is completed, tighten the first cap 6 to the bottom of the first sampling tube 1 to seal the second blood sampling port 5.
[0027] The two-stage rotatable, airtight and disposable blood sample sampler designed by the utility model is not equipped with a sharp instrument (needle). It is easy to use, simple in structure, low in cost, and has reasonable specifications. It can also reduce the risks of sharp instrument injuries and blood sample contamination.
Claims
1. An arterial blood sampler, characterized in that: The sampler is a two-stage rotary sealed disposable sampler, comprising a first sampling tube (1) and a second sampling tube (2), wherein the first sampling tube (1) is connected to the second sampling tube (2) in a rotary sealed manner, a first blood sampling port (4) is provided at the bottom of the second sampling tube (2), a second blood sampling port (5) is provided at the connecting surface between the first sampling tube (1) and the second sampling tube (2), and the first sampling tube (1) is provided with a push rod (3) matched therewith.
2. An arterial blood sampler according to claim 1, characterized in that: The inner wall of the first sampling tube (1) is coated with a heparin coating.
3. An arterial blood sampler according to claim 1, characterized in that: The first sampling tube (1) and the push rod (3) form a syringe structure. The push rod (3) moves in the inner cavity of the first sampling tube (1), extracts air from the inner cavity of the second sampling tube (2), draws waste liquid into the second sampling tube (2), and samples through the second blood sampling port (5).
4. An arterial blood sampler according to claim 1, characterized in that: The second blood sampling port (5) at the bottom of the first sampling tube (1) is equipped with a first cap (6). After sampling, the second sampling tube (2) is discarded, and the second blood sampling port (5) is sealed by the first cap (6) before the sample is sent.
5. An arterial blood sampler according to claim 1, characterized in that: The first sampling tube (1) and the second sampling tube (2) are combined into a whole through a spiral mouth structure to form a two-stage rotary sealed disposable sampler.
6. An arterial blood sampler according to claim 1, characterized in that: The second sampling tube (2) is in the shape of a closed cylinder, with blood sampling ports provided on the top and bottom thereof, and caps for sealing the blood sampling ports respectively.
7. An arterial blood sampler according to claim 6, characterized in that: The second sampling tube (2) is provided with threads at the top and bottom, and is threadedly connected to the cap.
8. An arterial blood sampler according to claim 1, characterized in that: The inner cavity volume of the second sampling tube (2) is 3 to 10 mL.
9. An arterial blood sampler according to claim 1, characterized in that: The first blood sampling port (4) of the arterial blood sampler matches the sampling port of the sensor for arterial blood sampling.