Correct Answer: B

Rationale: The correct answer is B. The nurse can safely remove restraints once no aggressive behavior is observed after releasing two extremity restraints for an hour. Choice A is incorrect because the removal of restraints should be based on the client's behavior rather than just the effect of medication. Choice C is incorrect as exploring reasons for aggressive behavior should be done before or during the intervention, not as a condition for removing restraints. Choice D is incorrect since an apology from the client does not guarantee a change in behavior or indicate that it is safe to remove the restraints.

Correct Answer: B

Rationale: The most effective intervention in preventing deep vein thrombosis (DVT) in a postoperative patient is to encourage early ambulation and leg exercises. Early ambulation helps promote circulation, preventing stasis and reducing the risk of blood clot formation. Encouraging the patient to drink plenty of fluids (choice A) is important for overall health but is not the most effective intervention for preventing DVT. Administering anticoagulants (choice C) is a valuable intervention in some cases, but it may not be suitable for all postoperative patients. Applying compression stockings (choice D) can help prevent DVT but is generally not as effective as early ambulation and leg exercises in postoperative patients.

Correct Answer: A

Rationale: The correct answer is to suction the tracheostomy as needed to maintain a patent airway. After a tracheostomy procedure, the immediate concern is airway patency to prevent respiratory compromise. Suctioning helps clear secretions and maintains a clear airway, reducing the risk of respiratory distress. Monitoring the patient's oxygen saturation (choice B) is important but not the priority compared to ensuring a clear airway. Providing humidified air (choice C) and administering pain medication (choice D) are also essential aspects of care for a patient with a tracheostomy, but they are not the priority when immediate airway management is required.

Correct Answer: B

Rationale: The correct answer is to assist the patient to sit down slowly. This intervention is appropriate for a patient experiencing dizziness when standing up, as it helps prevent falls due to orthostatic hypotension. Encouraging deep breaths (Choice A) may not address the underlying cause of dizziness, which is related to postural changes. Instructing the patient to use a walker for support (Choice C) or teaching the patient how to change positions safely (Choice D) are not the most immediate and direct interventions to address the immediate risk of falling when feeling dizzy upon standing.

Correct Answer: B

Rationale: Tachycardia and low blood pressure are indicative of worsening dehydration in a patient. Tachycardia is the body's compensatory mechanism to maintain cardiac output in response to decreased intravascular volume, while low blood pressure reflects inadequate perfusion due to decreased fluid levels. Bradycardia and shallow respirations are not typical findings in worsening dehydration, and clear lung sounds do not directly correlate with the severity of dehydration.