You are caring for a patient who has no cognitive functioning but only basic human functions such as opening the eyes and the sleep-wake cycle. What level of consciousness does this patient have?

Correct Answer: B

Rationale: A persistent vegetative state is characterized by the absence of cognitive functioning while basic human functions like the sleep-wake cycle are retained. In this state, the patient shows reflex movements and basic responses to stimuli but lacks awareness or higher mental functions. Choices A, C, and D are incorrect because: A) Obtunded refers to a decreased level of consciousness, not the absence of cognitive functioning. C) Locked-in syndrome is a condition where the patient is aware and awake but cannot move or communicate due to complete paralysis of nearly all voluntary muscles except for vertical eye movements and blinking. D) Brain death is the irreversible cessation of all brain activity, including the brainstem, leading to the loss of all functions of the brain.

Correct Answer: D

Rationale: Diabetes insipidus is caused by a disorder of the pituitary gland affecting ADH regulation. This disorder results in the decreased production or release of antidiuretic hormone (ADH), leading to the inability of the kidneys to concentrate urine properly. Choices A, B, and C are incorrect as they do not relate to the underlying cause of diabetes insipidus.

Correct Answer: D

Rationale: The correct answer is D because wound irrigation allows for the introduction of medications in solution form to the wound site. Choice A is incorrect because while wound irrigation can help with pain management indirectly by promoting healing, its primary purpose is not to reduce pain directly. Choice B is incorrect as wound irrigation primarily aims to cleanse the wound and remove contaminants rather than creating a 'clean' area to stop infection spread. Choice C is incorrect because wound irrigation does not involve pushing extravasated blood from a hematoma into nearby healthy tissue; its main goal is to cleanse the wound and promote healing.

Correct Answer: D

Rationale: The correct answer is D. An avulsion fracture occurs when a part of the bone is pulled away by a tendon or ligament. Choice A is incorrect because it describes an open fracture where the bone penetrates the skin. Choice B is incorrect as a pathological fracture results from an underlying disease weakening the bone, not physical trauma. Choice C is incorrect as a greenstick fracture involves the bone bending but not completely breaking.

Correct Answer: D

Rationale: The correct answer is D because adjuvant medications are often available over the counter without a prescription. Choices A, B, and C are incorrect. Choice A is incorrect because licensed practical nurses can administer adjuvant medications depending on their scope of practice. Choices B and C are incorrect because adjuvant medications are not classified as schedule 1 or schedule 2 narcotics.