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Vacutainer. A vacutainer blood collection tube is a sterile glass or plastic test tube with a colored rubber stopper creating a vacuum seal inside of the tube, facilitating the drawing of a predetermined volume of liquid. Vacutainer tubes may contain additives designed to stabilize and preserve the specimen prior to analytical testing.
These tubes should be used with care when measuring drug or hormone levels because the drug or hormone may diffuse from the serum into the gel, causing a reduction in measured level. The gel in SST II tubes (which appears slightly less opaque) is supposed [weasel words] to have less effect on drug levels in serum. [citation needed]
Pseudothrombocytopenia. Pseudothrombocytopenia (PTCP) or spurious thrombocytopenia is an in-vitro sampling problem which may mislead the diagnosis towards the more critical condition of thrombocytopenia. The phenomenon occurs when the anticoagulant used while testing the blood sample causes clumping of platelets which mimics a low platelet ...
As evidence, they offered the blood contained EDTA, a preservative found in purple top tubes used for blood draws, it was collected several weeks later on July 3, rather than on June 13, and 1.5 mL of Simpson's donated reference blood was unaccounted for. The officer who planted it was not named by the defense but Vannatter was implied.
Table of blood sampling tubes. Usually drawn first for minimal risk of contamination. [1] Two bottles are typically collected in one blood draw; one for aerobic organisms and one for anaerobic organisms. [2] Coagulation tests such as prothrombin time (PT) and partial thromboplastin time (PTT) and thrombin time (TT).
Purple urine bag syndrome ( PUBS) is a medical syndrome where purple discoloration of urine occurs in people with urinary catheters and co-existent urinary tract infection. Bacteria in the urine produce the enzyme indoxyl sulfatase. This converts indoxyl sulfate in the urine into the red and blue colored compounds indirubin and indigo. [1]
Tubipora purpurea Pallas, 1766. The organ pipe coral ( Tubipora musica) is an alcyonarian octocoral native to the waters of the Indian Ocean and the central and western regions of the Pacific Ocean. [1] It is the only known species of the genus Tubipora. This species is a soft coral but with a unique, hard skeleton of calcium carbonate that ...
Rouleaux (singular is rouleau) are stacks or aggregations of red blood cells (RBCs) that form because of the unique discoid shape of the cells in vertebrates. The flat surface of the discoid RBCs gives them a large surface area to make contact with and stick to each other; thus forming a rouleau. They occur when the plasma protein concentration ...