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Vascular Access Exam Prep

Category - Vascular Access Practice Test

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What is the difference between the effects of asking a patient to hold a fist while applying a tourniquet, and the effects of applying warmth to a potential puncture site? Choose all that apply.

  1. Application of heat engorges venous blood vessels, making palpitation easier
  2. Application of heat causes dilation of blood vessels, allowing veins to fill with more blood
  3. Holding a fist while a tourniquet is applied engorges venous blood vessels, making palpitation easier
  4. Holding a fist while a tourniquet is applied causes dilation of blood vessels, allowing veins to fill with more blood
  5. None of the above
Explanation

Answers: B and C - Requesting the patient to hold a fist while applying a tourniquet is a standard procedure at the start of all venipuncture procedures. The effect is venous engorgement; this allows easier identification of potential venipuncture sites by palpitation. The technique of applying warmth to a site is used for dilating blood vessels. This action will have the effect of increasing circulating blood to that area. Applying warmth to a newborn’s heel prior to a heel puncture is an example of this.

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