The classification of vacuum blood collection vessels includes the following: 1. Blood routine blood collection vessels: Blood routine blood collection vessels are mainly used for blood testing, in clinical blood type detection. 2、 Procoagulant blood collection: mainly used for collecting blood samples for biochemical and immunological examination in medical examination. 3、 Separation gel blood collection: The tube wall is coated with a coagulant and separation gel (pure substance), which can promote the rapid coagulation of blood and play a significant role in serum biochemistry, immunology, drug detection, and other fields. 4、 Heparin blood collection tubes: Heparin tubes are divided into two types: sodium heparin blood collection tubes and lithium heparin blood collection tubes. In clinical practice, they are mainly used for plasma testing, emergency biochemical testing in hospitals, blood rheology testing, and specimen collection. 5、 Additive free blood collection: mainly used in biochemical testing, immunological testing, serological testing, various virus testing, trace element testing, and collection and packaging of blood samples from blood banks in medical examinations.

Vacuum blood collection is a common tool used in clinical practice to collect blood samples. During use, you may encounter some common problems that need to be resolved in a timely manner. This article will introduce common problems and corresponding solutions when using vacuum blood collection tubes from different perspectives. Preoperative preparation questions: 1 Damaged blood collection vessel: Sometimes, the blood collection vessel may be damaged during transportation, and the outer packaging may be scratched or the gas chamber may be damaged. In this case, we should immediately replace a intact blood collection tube to avoid contamination and loss of blood samples. 2. Temperature issue: In clinical practice, blood vessels need to be kept within an appropriate temperature range during transportation and storage. If blood vessels are placed in high or low temperature environments, it may cause the blood sample to lose activity or coagulate. We should properly store and protect the blood collection tube to ensure that it is under appropriate temperature conditions.

The top ten advantages of vacuum blood collection: 1. The vacuum blood collection is made of plastic material, which is lightweight, pressure resistant, not easily broken, easy to transport, and ensures the safety of medical personnel. 2. The entire blood collection process is a closed system, hygienic and safe, ensuring that medical personnel do not come into contact with infectious sources. 3. All vacuum pipes are equipped with safety caps to avoid dirty spray. 4. The additive of anticoagulant tube is spray/dry powder/liquid, which can effectively anticoagulate. 5. The vacuum degree inside the vacuum collection vessel is accurate and reliable. All additives are automatically added, with precise sample addition, avoiding the disadvantage of poor repeatability in manual addition, thereby ensuring the accuracy and good repeatability of the results. 6. The color of the safety cover meets the standard, making it easy to distinguish the different additives inside the pipe. 7. The test tube specifications meet * * standards and are fully suitable for various automated analyzers.

According to the pharmaceutical industry standard YY 0314-1999 idt ISO 6170:1995 of the People's Republic of China, if one of the following five indicators is missing, it is considered an unqualified product. Suction volume experiment: The suction volume, i.e. the amount of blood drawn, has an error of ± 10%, otherwise it is considered unqualified. The inaccurate amount of blood drawn is currently the main problem. This not only results in inaccurate inspection results, but also causes blockage and damage to the inspection instruments. Container leakage experiment: Invert a vacuum blood collection tube containing a sodium fluorescein composite solution in deionized water for 60 minutes. Under a long wavelength ultraviolet light source, observe normal vision in a dark room without fluorescence, and it is considered qualified. Container leakage is the main reason for the inaccurate amount of blood drawn from vacuum blood collection vessels at present. Container strength test: The container is subjected to a centrifugal acceleration of 3000g for 10 minutes using a centrifuge, and it is considered qualified if it does not rupture. The strict requirement in foreign countries is that the vacuum collection tube should be placed 2 meters above the ground and not rupture when placed vertically, which can prevent accidental damage to the test tube and loss of the specimen.

Vacuum blood collection systems can be divided into two categories. There are two types of blood collection methods: hard connection and soft connection. The difference lies in the blood collection needle. The former is a hard connected blood collection needle, which requires a needle holder for matching; The latter is a soft connection type, which only requires a soft connection type blood collection needle. Due to the convenience of nursing operations and relatively low prices, soft connectors are commonly used in China. Next, let's introduce the core component of a vacuum blood collection system: a vacuum blood collection vessel. The principle of vacuum blood collection is pressure difference, where blood flows from higher pressure vessels to lower pressure vacuum blood collection vessels, similar to the concept of "water flowing downwards". When it comes to vacuum blood collection, it is not a complete vacuum, but a partial vacuum. During the production process, the manufacturer will extract a portion of the air to create a certain negative pressure inside. For example, this type of blood collection vessel requires a blood volume of 3 ml, and during production, 3 units of air will be extracted to ensure that the blood volume is within the required range; If you require 5 ml of health, then evacuate 5 units of air and so on. There are important knowledge points to tell everyone that blood collection is produced according to demand for two reasons:

There are several problems that vacuum blood collection vessels may encounter during the blood collection process: subcutaneous hematoma. When vacuum blood collection is carried out, the probability of subcutaneous hematoma occurrence is increased due to the patient's unclear blood vessels, the nurse's improper or unskilled operating skills, poor coagulation function of the patient, or improper pressing methods. During the operation, the nurse was injured due to the soft rubber material of the vacuum blood collection plug, which could easily harm the nurse during the process of connecting the vacuum blood collection tube to the blood collection needle. Nurses may also be injured when checking for air leakage from the blood collection needle due to its rear end passing through an elastic protective cap. Insufficient or excessive blood collection. If there is a lack of vacuum or insufficient vacuum in the vacuum collection vessel, coupled with the slant of the blood collection needle tightly adhering to the vessel wall, it can cause the patient's blood volume to be in a serious state of deficiency. Excessive blood collection is caused by excessive vacuum inside the vacuum collection vessel.

According to the pharmaceutical industry standard YY 0314-1999 idt ISO 6170:1995 of the People's Republic of China, if one of the following five indicators is missing, it is considered an unqualified product. The following are the five criteria for identifying qualified vacuum blood collection vessels: suction volume experiment: suction volume, i.e. the amount of blood drawn, with an error of ± 10%, otherwise it is considered unqualified. The inaccurate amount of blood drawn is currently the main problem. This not only results in inaccurate inspection results, but also causes blockage and damage to the inspection instruments. Container leakage experiment: Invert a vacuum blood collection tube containing a sodium fluorescein composite solution in deionized water for 60 minutes. Under a long wavelength ultraviolet light source, observe normal vision in a dark room without fluorescence, and it is considered qualified. Container leakage is the main reason for the inaccurate amount of blood drawn from vacuum blood collection vessels at present.

Vacuum blood collection is a type of vacuum negative pressure blood collection device. The widespread use of automated instruments and the preservation of blood have raised higher requirements for the stability of the original characteristics of blood samples, breaking through the requirement of safety alone. Its accuracy, original characteristics of the specimen, maintenance time and machine cooperation, test tube strength and other performance indicators can be used as the basis for evaluating the quality of vacuum blood collection. The collection of vacuum venous blood samples is a significant improvement on the traditional blood collection method. Due to the completion of blood collection procedures in a fully enclosed system, the possibility of blood contamination and cross infection is fundamentally ruled out; And due to its simple structure and convenient use, it is easy to popularize and promote.