Clinical ProceduresCâu 40 / 100
A medical assistant applies a tourniquet and then has trouble locating a vein. After how long should the tourniquet be released?
a.After 5 minutes, since the tourniquet keeps the vein visible
b.It may stay on until the entire draw is finished, regardless of time
c.After 10 minutes, then re-tightened immediately
d.Within 1 minute, then reapplied after a brief pause before the puncture
Giải thích
A tourniquet left on longer than about 1 minute causes hemoconcentration and can falsely elevate results such as potassium and protein, so it should be released and reapplied after a short rest if more time is needed. Leaving it in place for 5 or 10 minutes greatly worsens the distortion and causes patient discomfort. The tourniquet should also be released as soon as blood flow is established during the draw.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
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