Clinical ProceduresCâu 42 / 100
A patient's lavender-top specimen is rejected by the laboratory for hemolysis. Which technique error most likely caused it?
a.Letting the alcohol dry completely before puncture
b.Filling the tube to the manufacturer's fill line
c.Vigorously shaking the tube after collection and using an excessively small-bore needle
d.Inverting the tube gently eight times
Giải thích
Hemolysis occurs when red cells rupture, commonly from shaking tubes, forcing blood through a needle that is too small, or drawing through a traumatic puncture. Letting alcohol dry, filling to the correct line, and gentle inversion are all correct steps that help prevent hemolysis and clotting. Hemolyzed specimens falsely raise values such as potassium and must be redrawn.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Following the standard order of draw, which tube is collected immediately after the light blue sodium citrate tube?
- A medical assistant applies a tourniquet and then has trouble locating a vein. After how long should the tourniquet be released?
- Which vein is generally the first choice for routine venipuncture in an adult, and why?
- A patient scheduled for a blood draw had a left mastectomy with lymph node removal and has an IV running in the right forearm. What should the medical assistant do?
- What is the correct needle angle for a routine venipuncture in the antecubital fossa?
- Before running patient samples on a waived glucose meter, the medical assistant runs the low and high control solutions. Why is this step required?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với NHA Certified Clinical Medical Assistant (CCMA) Exam · Quy trình kiểm tra