What is a gel barrier tube?

Gel-barrier Tubes. Gel-barrier (mottled red/gray, gold, or cherry red-top) tubes contain clot activator and gel for separating serum from cells but include no anticoagulant.

Is an SST tube a gel barrier tube?

Clot activator and gel for serum separator Serum separator tube (SST) contains a gel at the bottom to separate blood cells from serum on centrifugation.

What is the use of gel tube?

FAR TEST Clot activator & Gel tubes (serum tubes) are used for biochemistry and immunology tests of blood. Tube walls is coated with silicon layer which causes faster clotting blood specimen and and avoiding hemolysis effect.

How does a gel separator tube work?

Gel Separator Tubes

Serum Separator Tubes (SST) and Plasma Separator Tubes (PST) contain separator gel additives. During centrifugation, the gel moves to create a physical barrier between the cellular elements and the serum/plasma.

What is the purpose of a gel separator?

Blood serum separator gel significantly improves serum and plasma analyte stability, facilitating storage and transport, creating a serum or plasma with higher performance and etc.

What color is a gel tube?

Blood Collection Tubes

Tube cap color Additive
Red or gold (mottled or “tiger” top used with some tubes) Serum tube with or without clot activator or gel
Green Sodium or lithium heparin with or without gel
Lavender or pink Potassium EDTA
Gray Sodium fluoride, and sodium or potassium oxalate

What is the gel at the bottom of the SST tube?

Trademarked versions of the SST include Covidien “Corvac” tubes. They contain a special gel that separates blood cells from serum, as well as particles to cause blood to clot quickly. The blood sample can then be centrifuged, allowing the clear serum to be removed for testing.

What is the clot activator in SST tubes?

VACUETTE® CAT serum separator clot activator tubes contain a separating gel that migrates up to the interface between serum and clot during centrifugation, where it forms a stable barrier and separates the serum from the fibrin and cells.

Why is there gel in blood tubes?

After centrifugation, the inert acrylic gel at the bottom of the tube normally occupies the middle position between the cells (clot) and the serum, as its density is intermediate between theirs. The gel then serves as a barrier to diffusion, preventing contamination of the serum with cellular components.

What is heparin tube?

Heparin VACUETTE® heparin tubes are coated on the inside wall with spray-dried lithium, ammonium or sodium heparin and are used to determine analytes in clinical chemistry. The additive acts as an anticoagulant, and blocks the clotting cascade.

How long does SST tube last?

5 days

After proper centrifugation, serum can be left in contact with the gel barrier of SST tubes for up to 5 days with proper storage.

Do SST tubes have additives?

SST Gold – Tube contains Clot Activator / SST™ Gel separator, used for serum chemistry testing. Mix by inverting 5 – 10 times immediately after collection. 6. Red – Tube contains no additive, used for serum chemistry testing, serology, and blood bank testing.

How do you use SST tube?

To obtain serum, whole blood should be collected into either an SST or plain red top tube. After collection, allow the tube to sit in an upright position at room temperature for 30-45 minutes. After the clot has formed, centrifuge the tube for 10 minutes at 3400 rpm.

What does SST mean in phlebotomy?


Gold Top (Serum Separator, “SST”) Contains separating gel and clot activator 6.0 mL
Light Blue – Yellow Label on Tube Thrombin 2.0 mL
Green Sodium heparin(100 USP Units) 5.0 mL
Tan K2 EDTA 5.0 mL

What tests are SST tubes used for?

Gold-top serum separator tube (SST)

This tube contains a clot activator and serum gel separator – used for various chemistry, serology, and immunology tests.

What is a gold SST blood test for?

Specimen required: 5ml serum SST (Gold top) Tests are performed by the immunology department at St Richards Hospital. This combined test will detect auto antibodies to gastric parietal cells; mitochondria; smooth muscle and liver-kidney microsomes.

How many tests are in a SST tube?