What technique should a medical assistant use to increase circulation when performing a capillary collection from a patient with poor circulation?

When performing a capillary collection from a patient with poor circulation, warming the patient's hand is an effective technique to increase blood flow. The application of warmth causes vasodilation, which enlarges the blood vessels and enhances circulation to the area. This increased blood flow makes it easier to obtain a sufficient blood sample for testing.

Using warmth can be achieved through several methods, such as using a warm cloth or a heat pack, and it should be done with care to avoid burns or discomfort. This technique is particularly useful in patients with reduced circulation, as it helps ensure that the capillary blood is more accessible.

Other methods, like keeping the patient’s hands elevated or applying a cold pack, would not promote circulation effectively. Elevation could actually impede blood flow, while a cold pack would constrict blood vessels, further hindering blood circulation. Using a larger gauge needle also does not apply in capillary collection, as it is typically performed with a finer gauge to minimize discomfort and damage to the small blood vessels in the fingertip or heel.