Specimen HandlingCâu 76 / 100
Why must additive tubes be mixed by gentle inversion rather than shaking?
a.Shaking increases the vacuum inside the tube
b.Shaking dissolves the stopper lubricant into the specimen
c.Gentle inversion is required only for serum tubes
d.Shaking causes mechanical hemolysis and foaming that invalidate many tests
Giải thích
Vigorous shaking shears red cells and creates foam, producing hemolysis that falsely raises potassium, LDH and AST and can prevent testing altogether. Gentle inversion distributes the additive without damaging cells and is required for every additive tube, not just serum tubes. Shaking has no effect on stopper lubricant or on the residual vacuum.
Trích dẫn luật: CLSI GP41Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
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