Specimen HandlingCâu 75 / 100
A phlebotomist notices the expiration date on a box of lavender tubes passed last month. What is the concern?
a.The tube color will fade and cause misidentification
b.Vacuum and additive reactivity decline, so fill volume and results become unreliable
c.Nothing, since expiration applies only to reagents
d.The stopper will not fit the holder correctly
Giải thích
Evacuated tubes lose vacuum and additive effectiveness over time, so an expired tube may underfill or fail to anticoagulate properly, producing unreliable results. Expired tubes are removed from stock and not used. Color coding and stopper fit are not the reason for the date, and expiration dating applies to collection devices as well as reagents.
Trích dẫn luật: CLIALuyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Unless a test specifies otherwise, at what temperature are routine blood specimens transported?
- A tube is submitted with far less blood than the test requires. How is this documented as a rejection reason?
- A routine urinalysis cannot be tested for 90 minutes. What is the correct interim handling?
- Serum is transferred into a secondary aliquot tube for send-out testing. What must be done?
- Why must additive tubes be mixed by gentle inversion rather than shaking?
- A serum tube is centrifuged five minutes after collection and fibrin strands appear in the serum. What went wrong?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với NHA Certified Phlebotomy Technician (CPT) Exam · Quy trình kiểm tra