Author Question: An older patient is scheduled for a CT scan with and without contrast dye. What should be done prior ... (Read 58 times)

APUS57 · **on:** Jun 25, 2018

An older patient is scheduled for a CT scan with and without contrast dye. What should be done prior to this CT scan?

1. Monitor renal function.
2. Assess for level of responsiveness.
3. Assess vital signs.
4. Keep the patient NPO.

Question 2

The nurse is explaining cardiac reserve to a patient recovering from a myocardial infarction. Which example should the nurse use to explain this term?

1. getting on a treadmill and gradually increasing the pace of walking
2. breathing in through the nose and out the mouth while sitting quietly
3. sitting in a chair to cool down after completing an exercise routine
4. at the end of systole, approximately 50 mL of blood remaining in the ventricles

xiaomengxian · **Reply #1 on:** Jun 25, 2018

Answer to Question 1

Correct Answer: 1
Common nephrotoxins associated with acute tubular necrosis include radiologic contrast media. The risk for acute tubular necrosis is higher when nephrotoxic drugs are given to older patients. Monitoring responsiveness and vital signs are important, but do not address the specific risks of this examination. The specific location of the body for the CT scan is not indicated, therefore, it is not known if the patient would need to be kept NPO prior to the test.

Answer to Question 2

Correct Answer: 1
The heart's ability to respond to the body's changing need for cardiac output is called cardiac reserve. Increasing the pace of walking would place demand on the heart to increase blood flow. The other actions do not place demand on the heart and therefore do not illustrate cardiac reserve.