Capillary Puncture

Practical Example

Safety Considerations

Safety considerations for capillary puncture in the medical office include proper technique and universal precautions.

Intramuscular injections: angle 90 degrees, sites include Vastus lateralis (thigh), Deltoid (upper arm), Ventrogluteal (preferred for adults), Dorsogluteal (avoided due to sciatic nerve risk). Maximum volume: Deltoid max 1mL, VG/VL max 3mL. Needle: 21-23G, 1-1.5 inch.

Equipment & Tools

Skin puncture using lancet on fingertip (adults) or heel (infants) for point-of-care testing. Capillary puncture technique tested on MA exam.

Clinical connection: Respirations technique involves Count without patient awareness (keep fingers on wrist), observe chest rise, count 30 sec x 2 or 60 .

Differential Diagnosis

When studying capillary puncture, carefully distinguish it from related but distinct concepts: phlebotomy, specimen handling. Exam questions often test your ability to select the most specific and appropriate answer when multiple options seem partially correct. Look for the option that most completely addresses the scenario presented.

Documentation

Documentation of capillary puncture in the medical office uses CPT: Procedure coding with 5-digit numeric codes, maintained by AMA.

Examples: 99213: Established patient office visit (low complexity); 36415: Venipuncture; 93000: Electrocardiogram (12-lead).

All documentation must be timely, accurate, legible, and include the provider signature. Late entries must be labeled as such with the date of the original event.