Common unqualified blood samples are divided into the following categories: 1

1. Coagulation blood sample

2. Hemolytic blood sample

3. Blood cell adhesion to the wall

Coagulation blood sample: refers to a specimen in which varying degrees of fibrin precipitation or blood clots occur after the blood sample is collected by an anticoagulant tube.

1. Explicit coagulation specimen: A specimen with visible blood clots or fibrin clusters is called an explicit coagulation specimen

2. Hidden coagulation specimen: A specimen in which fibrin appears in whole blood is called a hidden coagulation specimen

Cause analysis and solutions:

1. When using a syringe for blood collection, the dispensing volume exceeds the preset amount of the blood collection tube, resulting in insufficient anticoagulant dosage

When special circumstances require blood sample packaging, the preset amount of the blood collection tube should be used as the standard

2. The anticoagulant tube was not shaken evenly or was not shaken evenly in a timely manner, and the shaking method was incorrect

Gently invert 180 ° and shake 5-8 times in a timely manner

3. Patients with high blood viscosity may choose a small blood collection needle model and slow blood collection speed

Choose a suitable blood collection needle, or shake while collecting when the blood volume is large

4. Abnormal opening operation (i.e. the anticoagulant of the water agent often adsorbs onto the rubber stopper, and after abnormal opening, the rubber stopper will carry out some of the pre added anticoagulant, resulting in insufficient dosage of anticoagulant)