When using a syringe:

Question

Quizplus · Accepted Answer

Pulling back the plunger slowly helps prevent the formation of bubbles, which can cause inaccurate results or harm the patient by injecting air bubbles into their bloodstream.

Answer: B
 The bevel of the needle should be inserted facing up to reduce pain, prevent excessive bleeding, and improve sample quality.

Answer: C
 A tourniquet may be used to help locate veins, but it should be released before blood is drawn to prevent hemoconcentration (an increase in blood cells and other components due to prolonged occlusion) and discomfort.

Answer: None of the above.
 The correct way to withdraw blood using a syringe may depend on the patient's condition, the purpose of the test, the size of the needle, and other factors. Generally, blood should be collected slowly and steadily, without excessive stalling or probing, and the needle should be disposed of properly to avoid needlestick injuries. It is important to follow local regulations and standard operating procedures for blood collection and disposal.

When Using a Syringe