Which of the following will cause spuriously prolonged clot-based coagulation tests?
a. An evacuated 3.2% sodium citrate tube filled to 50% capacity
b. An evacuated 3.2% sodium citrate tube filled to 90% capacity
c. Prolonged tourniquet application
d. Plasma collected from a traumatic tap
ANS: A
Filling an evacuated 3.2% sodium citrate only halfway (50%) will lead to falsely prolonged clot-based coagulation test results. The relative excess anticoagulant will bind (some) of the calcium added in the test system. A 90% fill gives valid results and can be used. Prolonged tourniquet application and plasma collected from a traumatic tap both have the potential of activating coagulation, thus leading to shortened, not prolonged, results.
You might also like to view...
Because Occupational Safety and Health Administration (OSHA) standards have become very strict, there are a variety of safety devices to _______ or withdraw contaminated needles
a. sterilize b. cover c. remove d. contain
All of the following statements are true regarding biopharmaceuticals except:
A) They can include vaccines. B) They can include allergenics. C) They can be artificial forms of recombinant DNA. D) They are also known as biodrugs.
Dicloxacillin is classified as which kind of drug?
A) Penicillinase-resistant penicillin B) Monobactams C) Fluoroquinolone D) Aminoglycoside
The non-rebreather bag has a one-way valve on the exhalation port to prevent room air from entering the mask
Indicate whether the statement is true or false