A client weighing 198 lbs is prescribed Dopamine hydrochloride IV at 2 mcg/kg/minute to promote renal perfusion.

The pharmacy provides a pre-mixed bag of dopamine containing 400 mg in 250 mL dextrose 5% in water (D5W). An IV pump that provides a precision infusion rate to a tenth of a mL is available.

How many mL/hour should the IV pump be set to deliver? (Enter numeric value only. If rounding is required, round to the nearest tenth.)

Answer and Explanation

The Correct Answer is ["6.8"]

Step 1: Convert the client’s weight from lbs to kg. 1 kg is approximately 2.2 lbs. So, 198 lbs ÷

2.2 = 90 kg (rounded to the nearest whole number).

Step 2: Calculate the total mcg of Dopamine needed per minute. The prescription is for 2 mcg/kg/minute. So, 90 kg × 2 mcg/kg/minute = 180 mcg/minute.

Step 3: Convert the total mcg of Dopamine in the bag to mcg/mL. The bag contains 400 mg of Dopamine in 250 mL. 1 mg is equal to 1000 mcg. So, 400 mg × 1000 = 400,000 mcg. Therefore, the concentration is 400,000 mcg ÷ 250 mL = 1600 mcg/mL.

Step 4: Calculate the mL of Dopamine needed per minute. So, 180 mcg/minute ÷ 1600 mcg/mL

= 0.1125 mL/minute.

Step 5: Convert mL/minute to mL/hour. There are 60 minutes in an hour. So, 0.1125 mL/minute × 60 = 6.75 mL/hour. The IV pump should be set to deliver 6.8 mL/hour (rounded to the nearest tenth).

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Correct Answer is ["1.8"]

Explanation

The client weighs 132 pounds. To convert pounds to kilograms, divide the weight in pounds by

2.2. So, the client’s weight in kilograms is: Step 1: 132 pounds ÷ 2.2 = 60 kg The prescription for dantrolene is 1.5 mg/kg. To find out how many milligrams the client should receive, multiply the client’s weight in kilograms by the dosage in mg/kg: Step 2: 60 kg × 1.5 mg/kg = 90 mg The vial is reconstituted to yield a concentration of 50 mg/mL. To find out how many mL the nurse should administer, divide the total dosage in milligrams by the concentration in mg/mL: Step 3: 90 mg ÷ 50 mg/mL = 1.8 mL So, the nurse should administer 1.8 mL of dantrolene.

A. Absence of coarse crackles. B. Increase in breath sounds. C. Absence of fine crackles. D. Increase in respiratory rate.

Correct Answer is B

Explanation

Choice A rationale
The absence of coarse crackles is not necessarily an indication that chest physiotherapy (CPT) has been effective for a client with chronic obstructive pulmonary disease (COPD). Coarse crackles are often heard in conditions where there is fluid in the airways, such as pneumonia or heart failure. While their absence might indicate that there is no fluid in the airways, it does not necessarily mean that secretions have been effectively mobilized.
Choice B rationale
An increase in breath sounds is a good indication that chest physiotherapy (CPT) has been effective for a client with COPD3. CPT is a group of therapies designed to improve respiratory efficiency, promote expansion of the lungs, strengthen respiratory muscles, and eliminate secretions from the respiratory system. When these secretions are effectively mobilized and removed, breath sounds can become clearer and more easily heard.
Choice C rationale

The absence of fine crackles is not necessarily an indication that CPT has been effective for a client with COPD. Fine crackles are often heard in conditions where there is fluid in the airways or alveoli, such as pneumonia or heart failure. While their absence might indicate that there is no fluid in the airways or alveoli, it does not necessarily mean that secretions have been effectively mobilized.
Choice D rationale
An increase in respiratory rate is not necessarily an indication that CPT has been effective for a client with COPD. In fact, an increased respiratory rate could indicate respiratory distress, which could suggest that the therapy has not been effective or that the client’s condition has worsened.

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Naxlex Comprehensive Predictor Exams

Correct Answer is ["1.8"]

Explanation

A client with chronic obstructive pulmonary disease (COPD) receives a prescription for chest physiotherapy (CPT) to help mobilize secretions. Following the therapy, which finding indicates to the nurse that the intervention was effective?

Correct Answer is B

Explanation

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