The physician involved with the procedure-rationale: the physician involved with the procedure is responsible for obtaining the clients informed consent. the primary nurse or the nurse working with the physician may witness the clients signature. the social worker may not obtain informed consent.client needs category: safe, effective care environmentclient needs subcategory: management of carecognitive level: knowledgereference: craven, r.f., and hirnle, c.j. fundamentals of nursing: human health and function, 5th ed. philadelphia: lippincott williams & wilkins, 2007, p. 100.