Glass or silica particles are found in which tube?

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Multiple Choice

Glass or silica particles are found in which tube?

Silica acts as a clot activator to speed up clot formation, which is used in serum-collection tubes. These clot-activating tubes promote rapid clotting so serum can be separated quickly. Plastic red-top tubes are commonly designed as serum tubes that include a clot activator, often in the form of silica particles or a silica-coated surface. The other tubes shown are anticoagulant tubes (blue top with sodium citrate, green top with heparin), which are meant to prevent clotting and typically do not rely on silica to promote coagulation. So the tube that would contain glass or silica particles for clot activation is the plastic red-top serum tube.

Silica acts as a clot activator to speed up clot formation, which is used in serum-collection tubes. These clot-activating tubes promote rapid clotting so serum can be separated quickly. Plastic red-top tubes are commonly designed as serum tubes that include a clot activator, often in the form of silica particles or a silica-coated surface. The other tubes shown are anticoagulant tubes (blue top with sodium citrate, green top with heparin), which are meant to prevent clotting and typically do not rely on silica to promote coagulation. So the tube that would contain glass or silica particles for clot activation is the plastic red-top serum tube.

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