A nurse in the emergency room is caring for a client who presents with manifestations that indicate a myocardial infarction. Which of the following prescriptions should the nurse take first?

Choice A Reason: This is incorrect because the client's best motor response is 5, which means he can localize pain, not follow commands.

Choice B Reason: This is incorrect because the client's eye opening response is 3, which means he opens his eyes to pain, not to speech.

Choice C Reason: This is correct because the client's GCS score is 13, which indicates a severe impairment of consciousness. The GCS is a tool used to assess the level of consciousness of a person who has a head injury. The GCS score ranges from 3 to 15, with lower scores indicating lower levels of consciousness. A GCS score of 8 or less indicates coma. The client's GCS score is 3 + 5 + 5 = 13, which is above the coma threshold, but still indicates a severe impairment of consciousness. The other choices are not consistent with the client's GCS score.

Choice D Reason: This is incorrect because the client's best verbal response is 5, which means he can orient himself to person, place, and time, not that he is unable to make vocal sounds.

Choice A: Cold and numb sensation distal to the fistula site is a possible indication of venous insufficiency. Venous insufficiency is a condition in which the veins have difficulty returning blood from the limbs to the heart, resulting in blood pooling and reduced perfusion. A new arteriovenous fistula can cause increased blood flow through the artery and decreased blood flow through the vein, leading to venous insufficiency. This can manifest as coldness, numbness, tingling, or cyanosis in the fingers or hand below the fistula site.

Choice B: A raised red rash around the fistula site is not a possible indication of venous insufficiency. A raised red rash around the fistula site can indicate an allergic reaction, an infection, or an inflammation of the skin or subcutaneous tissue. The nurse should assess the rash for size, shape, color, texture, temperature, and drainage, and report any signs of infection or inflammation, such as fever, pus, or swelling.

Choice C: Pain in the right arm proximal to the fistula site is not a possible indication of venous insufficiency. Pain in the right arm proximal to the fistula site can indicate arterial insufficiency, which is a condition in which the arteries have difficulty delivering oxygen-rich blood to the tissues, resulting in ischemia and necrosis. Arterial insufficiency can be caused by atherosclerosis, thrombosis, embolism, or vasospasm. The nurse should assess the pain for location, intensity, duration, frequency, and quality, and report any signs of ischemia or necrosis, such as pallor, coolness, weak pulses, or ulceration.

Choice D: Foul-smelling drainage from the fistula site is not a possible indication of venous insufficiency. Foul-smelling drainage from the fistula site can indicate an infection of the fistula or surrounding tissue. The nurse should assess the drainage for color, odor, amount, and consistency, and report any signs of infection or sepsis, such as fever, chills, malaise, or hypotension.