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You need to be more descriptive with your question. There are lots of things that could be called "clot tubes". Small blood vessels are called capillaries. The blood cells that play a primary role in clotting are called platelets.

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13y ago

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How does blood clot in test tubes because of the glass?

Blood clotting in test tubes due to glass occurs when the glass surface activates clotting factors present in the blood. The glass can cause physical trauma to the blood cells, triggering the clotting process. This can lead to ex vivo clot formation in blood samples collected in glass test tubes.


Why doesn't blood clot in the bottles in Blood banks?

Tubes used for blood bank (Pink and Lavender top) contain a chemical called EDTA that binds the calcium in blood, which is needed for blood to clot. Red or Gold top tubes contain no chemicals to prevent the blood to clot, so the blood will clot with out being exposed to air. Each specific department in the lab have different colored tubes with different chemical/no chemical in them depending on what test has been ordered.


What color test tube is serum?

The color of the test tube for serum is typically red or gold. Red top tubes contain a clot activator and are used for collecting serum for various blood tests. Gold top tubes have a clot activator and serum separator gel to aid in separating serum from other blood components.


When do you use speckled tubes in a draw?

Speckled tubes, often referred to as serum separator tubes (SST), are used when a serum sample is required for testing. The speckled or mottled color typically indicates that the tube contains a gel separator and a clot activator, allowing for the separation of serum from the clot after centrifugation. They are commonly used for a variety of tests, including chemistry panels and certain serology tests, where serum is needed rather than whole blood.


Should blood in red blood tubes clot before spinning blood for lab test?

No, blood in red blood tubes should not clot before spinning for lab tests. The anticoagulant present in the tube is meant to prevent clotting so that the blood remains in a liquid state for accurate testing. If clotting occurs, it may affect the test results.


How many red top tubes are there?

There are typically two red top tubes used for blood collection in clinical settings: one containing no additives (plain tube) and one containing a clot activator. The specific number may vary based on the brand or type of tubes being used.


How is clot activator reagents made?

Clot activator reagents are usually made by combining materials like silica, kaolin, or glass particles with a separation gel such as thixotropic gel or silicone to promote clot formation in blood collection tubes. These materials help accelerate the clotting process by activating the coagulation cascade when blood is collected in the tube. The specific formulation of clot activator reagents can vary between manufacturers.


What is clot activator?

A clot activator is a substance used in laboratory settings to promote the coagulation process in blood samples. It typically contains materials like silica or diatomaceous earth that facilitate the conversion of prothrombin to thrombin, leading to the formation of a clot. Clot activators are commonly used in blood collection tubes to accelerate serum separation from the cellular components of blood, enabling quicker analysis of the serum in various diagnostic tests.


What does the sst top tube contain plasma or serum after processing?

The sst top tube typically contains serum after processing because the clot activator in the tube separates the serum from the blood cells. Plasma is obtained from tubes with anticoagulants that prevent clot formation.


Color tube is used for serum iron test?

The color tubes used for serum iron tests are typically red or gold-topped vacuum tubes. These tubes contain a clot activator and gel separator to obtain serum for testing. Serum iron levels are measured to assess iron deficiency or iron overload in the body.


What color for cardiac enzyme blood draws?

The tubes used for cardiac enzyme blood draws are typically red or tiger-topped tubes, which contain a clot activator and a gel separator. These tubes are used for testing cardiac enzymes like troponin, creatine kinase (CK), and CK-MB levels.


What are red top tubes used for?

Red top tubes are typically used for blood collection to obtain serum samples. The red top indicates the absence of anticoagulants or clot activators in the tube, making it suitable for tests that require serum, such as blood chemistry tests or serology.