The nurse is caring for a postoperative patient on the medical-surgical floor. Which activity will the nurse encourage to prevent venous stasis and the formation of thrombus?

Correct Answer: C

Rationale: Correct Answer: C (Leg exercises) Rationale: 1. Leg exercises promote muscle contractions, aiding in venous return. 2. Movement prevents stasis and thrombus formation. 3. Diaphragmatic breathing, incentive spirometry, and coughing are important postoperative activities but do not directly prevent venous stasis like leg exercises do.

Correct Answer: B

Rationale: The correct answer is B: Wrap the finger in gauze (moistened with normal saline), and seal the finger in a plastic bag before placing it on ice. This method helps preserve the amputated part by keeping it moist and cool, which can improve the chances of successful reattachment. Here's a step-by-step rationale: 1. Moistening the gauze with normal saline helps prevent the tissue from drying out, maintaining its viability. 2. Sealing the finger in a plastic bag helps protect it from contamination and further damage during transport. 3. Placing the sealed finger on ice helps keep it cool, which slows down metabolic processes and reduces tissue damage. 4. Avoiding direct contact of the finger with ice prevents frostbite and tissue damage from extreme cold. In summary, option B is the best choice as it optimally preserves the amputated finger for potential reattachment. Option A does not maintain moisture, leading to tissue damage. Option C's use of water

Correct Answer: B

Rationale: The correct answer is B: Multiplex mode. In multiplex mode, voice and telemetry signals are combined and transmitted simultaneously on a single communication channel. This mode allows for efficient use of bandwidth by transmitting multiple types of data concurrently. Trunk system mode (A) involves multiple channels for different users, not for voice and telemetry together. Duplex mode (C) allows for two-way communication but not necessarily simultaneous voice and telemetry. Simplex mode (D) only allows communication in one direction at a time, not suitable for transmitting voice and telemetry simultaneously.

Correct Answer: C

Rationale: Step-by-step rationale for answer C: An early sign of a possible aortic dissection is a blood pressure difference of 20 mmHg or more in the upper extremities due to impaired blood flow. This discrepancy occurs because the dissection can obstruct blood flow to one of the brachial arteries, leading to a difference in blood pressure readings between the arms. This sign is a result of the aortic dissection affecting the arterial blood supply to the upper extremities. Summary of incorrect choices: A: A narrowing pulse pressure and tachycardia - These symptoms are more commonly associated with conditions like shock or dehydration, not specifically indicative of aortic dissection. B: A sudden rise in systolic blood pressure and fall in diastolic blood pressure - While changes in blood pressure can occur in aortic dissection, the specific pattern described here is not a typical early sign. D: A reddish-blue discoloration of the skin above the shoulders - Skin discolor

Correct Answer: A

Rationale: The correct answer is A because autonomic nervous system involvement in a spinal cord injury often results in bradycardia, hypotension, and a loss of sweating or shivering ability. This is due to disruption of sympathetic and parasympathetic pathways. Choice B is incorrect because hypertension and warm, dry skin are not typical signs of autonomic involvement in spinal cord injury. Choice C is incorrect because tachycardia and hypertension are more commonly seen with sympathetic overactivity, not autonomic involvement in spinal cord injury. Choice D is incorrect because tachycardia, hypotension, diaphoresis, and cool, clammy skin are more indicative of shock rather than specific autonomic involvement in spinal cord injury.