Comparison of methods for calculating human body surface area in cancer patients

Objective To extend the method for calculating human body surface area in cancer patients with different BMI ranges.Methods The actual body weight and the height of cancer patients were measured at admission,the second day and before chemotherapy to get the average value.The subjects were divided into magersucht group,normal quality group,overweight group and obesity group according to BMI(≤18.6kg/m2,18.6-23.9kg/m2,24-27.9kg/m2 and ≥28kg/m2).Ideal body weight,ideal surface area and actual surface area were formulated and analyzed.Results The actual body surface area and ideal body surface area were 1.590m2 and 1.584 m2 in normal quality group(P0.05).The actual body surface area and ideal body surface area were 1.523m2 and 1.641m2,1.724m2 and 1.590m2,1.813m2 and 1.570m2 in magersucht group,overweight group and obesity group(P0.05).Conclusion There are significant differences between actual body surface area and ideal body surface area of patients according to BMI classification.The ideal body surface area based on ideal body weight could get more precise drug dose and avoid otiose therapeutic risk.