Clinical Calculations With Applications to General And Specialty Areas 7th Edition by Joyce - Sally M. - Test Bank

OTHER

Body Surface Area by Square Root

1. Order: cyclophosphamide 500 mg/m² in 500 mL of normal saline solution (NSS) over 90 minutes

Patient height and weight: 5 ft 10 in, 142 lb

Drug available: cyclophosphamide 100 mg dilute with 5 mL of sterile water; yields 20 mg/mL

a. What is the patient’s body surface area (BSA) (m²)?

b. What is the total dose?

c. How many milliliters should you prepare?

ANS:

a. 

b. 500 mg/m² × 1.78 m² = 890 mg

c. FE: 890 mg/100 mg × 5 mL = 44.5 mL  

OR 

2. Order: cisplatin 50 mg/m² in 500 mL of NSS intravenously over 90 minutes

Patient height and weight: 5 ft 6 in, 160 lb

Drug available: cisplatin 100 mg/100 mL

a. What is the patient’s BSA (m²)?

b. What is the total dose?

c. How many milliliters should you prepare?

ANS:

a. 

b.50 mg × 1.83 m² = 91.5 mg

c.  FE: 91.5 mg/100 mg × 100 mL = 91.5 mL or 92 mL  

OR 

For Questions 3 through 18, use the square root method and/or nomogram. Note discrepancies between methods.

3. Give dacarbazine 250 mg/m²/day × 5 days.

Patient height: 5 ft 10 in

Patient weight: 173 lb

What is the daily dose with:

a. square root method?

b. nomogram?

ANS:

a.