A 53-year-old client with suspected leukemia is scheduled for a bone marrow biopsy this afternoon. The client appears anxious and asks multiple questions about the procedure. Which nursing intervention is most important to implement before the procedure?

Obtaining informed consent is the most critical nursing intervention before any invasive procedure like bone marrow biopsy.

Bone marrow biopsy is an invasive test for diagnosing hematologic diseases, requiring proper preparation and patient understanding. The most important nursing intervention before the procedure is obtaining the consent form and confirming that the patient fully understands the procedure.

The consent form is a legal and ethical requirement that protects both the patient and the medical staff. The nurse must verify that the physician has explained the purpose, risks, benefits, and alternatives of the procedure. The patient should understand that a bone marrow biopsy involves inserting a needle through the skin and bone to collect a bone marrow sample, typically performed at the posterior iliac crest.

The key element of consent verification is ensuring the patient understands the purpose of the procedure (diagnosing hematologic diseases such as leukemia), potential complications (bleeding, infection, pain), and post-procedure care requirements. A patient who appears anxious and asks many questions indicates a need for thorough education and consent verification.

Pain management, positioning, and site preparation are also important aspects of procedure preparation, but these are performed after obtaining consent. The nurse cannot proceed with any procedure preparation until legal consent is secured and the patient demonstrates understanding of the procedure.