What is the dose for a 170-lb patient?

Question

An intramuscular medication is given at 5.00 mg/kg of body weight. Express using 2 significant figures using conversion factors.

Answer 1

Using two significant figures, 1 kg = 2.2 lbs

Converting 170 lbs to kg:  170 lb x 1 kg/2.2 lbs = 77.3 kg

Calculating dose:  77.3 kg x 5.00 mg/kg = 386.5 mg

Rounding to 2 significant figures:  Dose = 390 mg

 

Answer 2

1 Pound = 0.45359237 Kilogram

(170 lb)(0.45359237 kg/lb) = 77.1107029 kg

 

(77.1107029 kg)(5 mg/kg) = 385.5535145 mg

 

385.55 mg

Answer 3

To determine the dose of intramuscular medication for a patient weighing 170 lbs, follow these steps:

1. Convert the Patient's Weight to Kilograms

1. Conversion Factor: 1 lb = 0.453592 kg
2. Calculation:
3. Weight in kg=170 lbs×0.453592 kg/lbWeight in kg=170 lbs×0.453592 kg/lbWeight in kg≈77.11 kgWeight in kg≈77.11 kg

2. Calculate the Dose in Milligrams

1. Medication Dose: 5.00 mg/kg
2. Calculation:
3. Dose (mg)=Weight in kg×Dose (mg/kg)Dose (mg)=Weight in kg×Dose (mg/kg)Dose (mg)=77.11 kg×5.00 mg/kgDose (mg)=77.11 kg×5.00 mg/kgDose (mg)≈385.55 mgDose (mg)≈385.55 mg

3. Express the Dose Using 2 Significant Figures

1. Rounded Dose:
2. Dose (mg)≈390 mgDose (mg)≈390 mg

Final Dose:

For a 170-lb patient, the dose of the intramuscular medication is approximately 390 mg.