The sensitivity part of a culture and sensitivity test is for the purpose of:

Determining which medications are ineffective against the causative organism.

Testing anti-infective medications to see which ones are most effective against the causative organism.

Growing colonies of the causative organism on a culture medium.

Identifying the causative organism of the infection.

Answer and Explanation

The Correct Answer is B

A. Determining which medications are ineffective against the causative organism: The test determines both effective and ineffective antibiotics, but the focus is on identifying the most effective ones.

B. Testing anti-infective medications to see which ones are most effective against the causative organism. Sensitivity testing determines which antibiotics are most effective against the specific organism, guiding treatment.

C. Growing colonies of the causative organism on a culture medium: This is part of the culture process, not sensitivity testing.

D. Identifying the causative organism of the infection: This is also part of the culture process, not the sensitivity component.

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Correct Answer is A

Explanation

A. After 30 seconds. The dipstick test typically requires timing for a set period of time, usually 30 seconds, to ensure the chemical reactions on the dipstick have had enough time to develop. The nurse should refer to the test manufacturer’s instructions for the exact timing.

B. Immediately. Starting the timer immediately may not be the best practice, as most urine dipstick tests require a set amount of time to allow the chemicals to react and change color. Immediate timing may lead to inaccurate results.

C. After 10 seconds. While 10 seconds may be necessary for some tests, it is not the standard for all urine dipstick tests. The nurse must refer to the manufacturer's guidelines for the specific test being used.

D. After 5 seconds. Starting after 5 seconds is typically too short of a time to allow the dipstick test to react fully. As with other timing options, the proper duration for accurate results must be followed based on the manufacturer's instructions.

A. "You will not be able to talk to the technician during the procedure." B. "Your exposure to radiation will be minimal." C. "Unlike an x-ray, the MRI allows you to move around a bit." D. "You'll have to remove metal objects such as watches and body jewelry."

Correct Answer is D

Explanation

A. "You will not be able to talk to the technician during the procedure.": Most MRIs allow communication via intercom.

B. "Your exposure to radiation will be minimal.": MRI does not use ionizing radiation, unlike CT scans or X-rays.

C. "Unlike an x-ray, the MRI allows you to move around a bit.": Movement during MRI imaging can result in blurred images.

D. "You'll have to remove metal objects such as watches and body jewelry." MRI uses strong magnetic fields, so all metal objects must be removed to avoid injury or interference with imaging.

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The sensitivity part of a culture and sensitivity test is for the purpose of:

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Naxlex Comprehensive Predictor Exams

A patient in the outpatient clinic has provided a urine sample. To perform a urine dipstick test accurately, the nurse wets the dipstick and starts timing:

Correct Answer is A

Explanation

A nurse is preparing a client for magnetic resonance imaging (MRI). Which of the following statements should the nurse include when reinforcing teaching?

Correct Answer is D

Explanation

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