Industry development trend and latest news
In the early 1940s, vacuum blood collection technology was invented, which omitted unnecessary steps such as drawing needle tube and pushing blood into test tube, and utilized the vacuum automatic blood feeding tube pre-manufactured in vacuum tube to reduce the possibility of hemolysis to a large extent. Other medical device companies also introduced their own vacuum blood collection products, and in the 1980s, a new tube cover for safety tube cover was introduced. The safety cover consists of a special plastic cover covering the vacuum tube and a newly designed rubber plug. The combination reduces the likelihood of contact with the contents of the tube and prevents finger contact with residual blood at the top and end of the plug. This vacuum collection with a safety cap greatly reduces the risk of contamination by health care workers from collection to blood processing. Because of its clean, safe, simple and reliable features istics, the blood collection system has been widely used in the world and has been recommended by NCCLS as the standard instrument for blood collection. Vacuum blood collection was used in some hospitals in China in the mid-1990s. At present, vacuum blood collection has been widely accepted in most hospitals in large and medium-sized cities. As a new way of clinical blood collection and detection, vacuum blood collector is a revolution of traditional blood collection and storage.
Specimen Collection Procedure
1. Select the appropriate tubes and blood collection needle (or blood collection set).
2. Gently tap tubes containing additives to dislodge any material that may be adhering to the stopper.
3. Use a tourniquet and clean the venipuncture area with an appropriate antiseptic.
4. Make sure to place the patient’s arm in a downward position.
5. Remove the needle cover and then perform the venipuncture.
6. When the blood appears, puncture the rubber stopper of the tube and loosen the tourniquet as soon as possible. The blood will flow into tube automatically.
7. When the first tube is full (blood stops flowing into the tube), gently remove the tube and change a new tube. (Refer to the Recommended Order of Draw)
8. When the last tube is full, remove the needle from the vein. Use a dry sterile swab to press the puncture site until the bleeding stops.
9. If the tube contains additive, gently invert the tube 5-8 times immediately after blood collection to ensure the sufficient mix of additive and blood.
10. The non-additive tube should be centrifuged no earlier than 60-90 minutes after blood collection. The tube contains clot activator should be centrifuged no earlier than 15-30 minutes after blood collection. The centrifugal speed should be 3500-4500 rpm/min (relative centrifugal force > 1600gn) for 6-10 minutes.
11. The whole blood test should be performed no later than 4 hours. The plasma specimen and the serum specimen separated should be tested without delay after collection. The specimen should be stored at specified temperature if the test can’t be performed in time.
Materials Required But Not Supplied
Blood collection needles and holders (or Blood collection sets)
Recommended Order Of Draw
Blue tube, red tube, orange tube, yellow tube, green tube, lavender tube, black tube, grey tube
Note: It is recommended to use a discard tube (red tube) as the first tube to be drawn if a blood collection set is used. That will ensure the proper anticoagulant-to-blood ratio.
Warnings And Precautions
1. For in vitro use only.
2. Do not use the tubes after the expiry date.
3. Do not use the tubes if the tubes have breakage.
4. Only for single use.
5. Do not use the tubes if foreign matter is present.
6. The tubes with STERILE mark have been sterilized using Co60.
7. The instructions must be followed precisely to ensure good performance.
8. The tube contains clot activator should be centrifuged after the blood complete coagulation.
9. Avoid the tubes exposure to direct sunlight.
10.Wear gloves during venipuncture to minimize exposure hazard
Store tubes at 18-30°C, humidity 40-65% and avoid exposure to direct sunlight. Do not use tubes after their expiration date indicated on the labels.