A nurse is assessing a client who was placed in restraints for aggressive behavior. The client is now calm and cooperative. Which of the following actions should the nurse take?

Rationale:
A. Obtain a 12-lead ECG for the client: An ECG is important to assess for myocardial ischemia or infarction, but it should be done after immediate measures are taken to reduce myocardial oxygen demand.

B. Administer sublingual nitroglycerin to the client: Nitroglycerin helps relieve chest pain by dilating coronary arteries, but it should be given only after the client is safely seated or resting to prevent hypotension or injury.

C. Measure the client's vital signs: Vital signs provide valuable baseline data, but addressing the client’s immediate safety and reducing cardiac workload takes priority.

D. Have the client stop walking and sit down: Stopping activity decreases oxygen demand on the heart and prevents worsening ischemia or collapse, making it the first and most critical action.

Rationale:
A. The client agreed to the procedure voluntarily: By witnessing the signature, the nurse verifies that the client is signing the consent form without coercion, fulfilling the legal requirement that consent is given voluntarily. This does not require the nurse to provide detailed explanations of the procedure.

B. The nurse explained the surgical procedure in detail: The responsibility for explaining the procedure, risks, and benefits lies with the surgeon or provider, not the nurse witnessing the consent. Witnessing only confirms voluntary agreement.

C. The nurse explained the risks and benefits of the surgery: Explaining risks and benefits is the provider’s legal obligation. The nurse’s role is to witness the client’s signature, not to provide detailed medical explanations.

D. The client knows they may no longer refuse the procedure: Clients always retain the right to refuse a procedure, even after signing consent. Witnessing does not override the client’s autonomy or ability to change their mind.