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Answer :
Final answer:
We calculate the total dose needed in micrograms per minute and then establish the concentration of dopamine in the bag in micrograms per ml. By dividing the dose by concentration per ml, we achieve the volume in ml required per minute. Since we are using a microset, we then convert this to drips per minute, arriving at 530 drips per minute.
Explanation:
To calculate the drips per minute, we first need to convert the patient's weight from pounds to kilograms, since our dosage is in micrograms per kilogram per minute. The patient's weight is approximately 85 kilograms (187 Lbs ≈ 85 kg). Next, we multiply this by the prescribed dosage of dopamine, which is 10 micrograms per kilogram per minute. This gives us a total of 850 micrograms per minute.
As the premixed bag contains 800 mg of dopamine (which equals 800,000 micrograms), we then need to work out how many micrograms per milliliter this is. Dividing 800,000 by the volume of the bag (500 ml), we find that there are 1,600 micrograms of dopamine per milliliter.
To find out how much volume we need to deliver the desired dose, we divide the needed dose (850 micrograms) by the concentration per milliliter, and get approximately 0.53 ml/min. Finally, as we're using a micro drip set where each drip equals 0.001 ml (or 1 mcg), we multiply 0.53 by 1000 to get the number of drips per minute. Hence we have 530 drips per minute.
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