Correct Answer: B

Rationale: The correct answer is B because withdrawal is a common psychological response in the dying process. The nurse should explain to the son that his mother's lack of response may be her way of preparing to leave life. This response validates the son's concerns while providing reassurance. Choice A is incorrect because cutting back visits may not address the underlying issue of the mother's withdrawal. Choice C is incorrect because stimulating the mother may not be beneficial or appropriate in this situation. Choice D is incorrect because not all patients experience a lack of awareness at the end of life, and assuming so may not be helpful in this context.

Correct Answer: C

Rationale: Rationale: 1. Intermittent Mandatory Ventilation (IMV) allows the patient to breathe spontaneously between the preset mechanical breaths. 2. It provides a set number of breaths per minute while allowing the patient to initiate additional breaths at their own tidal volume. 3. IMV is a partial ventilatory support mode, providing a balance between controlled and spontaneous breathing. 4. Assist/Control Ventilation (A) provides full support with every breath initiated by the patient or the ventilator. 5. Controlled Ventilation (B) does not allow for spontaneous breaths by the patient. 6. Positive End-Expiratory Pressure (D) is a separate mode focusing on maintaining positive pressure at the end of expiration, not providing breaths.

Correct Answer: D

Rationale: The correct answer is D: Initiate CPR and call a code. In this scenario, the patient is critically ill with ventricular tachycardia, a life-threatening arrhythmia. Since there is no "do not resuscitate" order, the appropriate nursing action is to initiate CPR immediately to attempt to restore the patient's cardiac function and circulation. Calling a code will ensure that a team of healthcare providers can respond promptly with necessary interventions. Options A and B involve unnecessary delays in potentially life-saving interventions. Option C is incorrect as withholding intubation can compromise the patient's airway and oxygenation. Thus, option D is the most appropriate action to prioritize the patient's safety and well-being in this critical situation.

Correct Answer: D

Rationale: Ultrafiltration is the correct answer because it involves the removal of plasma water and low-molecular weight particles by using a pressure or osmotic gradient. During ultrafiltration, the pressure gradient pushes the fluid through a semipermeable membrane, separating the substances based on their molecular size. This process allows for the selective removal of unwanted substances while retaining essential components. Dialysis (choice A) involves the removal of waste products from the blood, but it does not specifically target plasma water and low-molecular weight particles. Diffusion (choice B) is the passive movement of particles from an area of higher concentration to an area of lower concentration and is not specific to the removal of plasma water. Clearance (choice C) refers to the rate at which a substance is removed from the blood and does not involve the mechanism of pressure or osmotic gradient utilized in ultrafiltration.

Correct Answer: A

Rationale: Step 1: Symptoms of weight loss, racing heart rate, and difficulty sleeping are common in hyperthyroidism. Step 2: Presence of moist skin, fine hair, prominent eyes, lid retraction, and staring expression are classic signs of Grave's disease, a type of hyperthyroidism. Step 3: Grave's disease is an autoimmune disorder where the thyroid gland is overactive, leading to excessive production of thyroid hormones. Step 4: Excess thyroid hormones increase metabolic rate, causing weight loss, racing heart rate, and insomnia. Step 5: Therefore, the findings described in the question are consistent with Grave's disease.