The nurse has given nutritional instructions to a patient with acquired immune deficiency syndrome (AIDS) who has recurrent diarrhea. Which statement by the patient requires further instructions?

A. Having the primary provider prescribe a CT:
Prescribing a CT scan is not the initial action for assessing nonpalpable pedal pulses. CT scans are typically used for imaging purposes and are not the primary diagnostic tool for assessing peripheral pulses.

B. Apply a tourniquet for 3 to 5 minutes and then reassess:
While applying a tourniquet may increase the visibility of pulses in some cases, it is not the recommended method for assessing pedal pulses, especially if they are nonpalpable. Tourniquet use carries risks, such as tissue damage or ischemia, and is not a standard practice for assessing pulses.

C. Elevate the extremity and attempt to palpate the pulses:
Elevating the extremity may improve blood flow and make pulses easier to palpate, but if the pulses are nonpalpable, simply elevating the extremity may not be sufficient for assessment. Additionally, palpation alone may not accurately detect pulses in some cases.

D. Use the doppler ultrasound to detect pedal pulses:
This is the most appropriate action. Doppler ultrasound is a non-invasive diagnostic tool commonly used to assess peripheral pulses, especially when they are nonpalpable. It uses sound waves to detect blood flow and can provide accurate information about the presence and strength of pedal pulses. Using a doppler ultrasound can help confirm the status of pedal pulses and guide further management.

A. "Warfarin takes several days to work, so the heparin will be used until the warfarin reaches a therapeutic level":
This response is correct because warfarin, an oral anticoagulant, takes several days to reach its full therapeutic effect due to its mechanism of action on vitamin K-dependent clotting factors. Therefore, heparin, which has an immediate onset of action, is used concurrently to prevent new clot formation until warfarin reaches therapeutic levels. Once warfarin reaches its therapeutic range, heparin is typically discontinued.

B. "The heparin increases the effects of the warfarin and decreases the length of your hospital stay":
This statement is incorrect. While heparin and warfarin both act as anticoagulants, they have different mechanisms of action. Heparin works rapidly by inhibiting thrombin, while warfarin acts more slowly by inhibiting vitamin K-dependent clotting factors. The concurrent use of heparin and warfarin is not to increase the effects of warfarin but rather to bridge the gap until warfarin reaches therapeutic levels.

C. "I will call the provider to discontinue the heparin":
Discontinuing heparin without a clear order from the provider could be inappropriate and potentially dangerous. Abrupt discontinuation of heparin before warfarin reaches therapeutic levels could increase the risk of thrombus formation or embolization. The decision to discontinue heparin should be made by the provider based on the patient's individual clinical status and response to therapy.

D. "Both medications work together to dissolve the clots":
While both heparin and warfarin are anticoagulants used to prevent further clot formation and propagation, they do not directly dissolve existing clots. Instead, they prevent the formation of new clots and allow the body's natural fibrinolytic system to gradually break down existing clots. Therefore, this statement is not entirely accurate in describing the mechanism of action of these medications.