Clinipocket
لدعم القرار السريري فقط. تحقق دائماً من البروتوكولات المعتمدة في مؤسستك.

مؤشر كتلة الجسم ومساحة سطح الجسم

حساب مؤشر كتلة الجسم ومساحة سطح الجسم بمعادلتي موستيلر ودو بوا.

نظرة سريرية عامة

BMI and body surface area is a structured clinical decision-support tool. They describe body size for screening and for protocols explicitly validated against BSA. It standardizes calculation and communication, but its output remains an estimate that must be interpreted with the complete history, examination, laboratory method, imaging, serial trend, and institutional protocol. Enter contemporaneous data and verify units before relying on the result.

The displayed category reflects cohorts and conventional thresholds rather than a diagnosis or mandatory treatment instruction. Document inputs with the result, reassess when the patient changes, and prioritize time-critical stabilization over score completion. Discordance between the calculated estimate and clinical concern should prompt review of measurements, assumptions, competing diagnoses, and specialist advice.

دواعي الاستخدام

  • Adult nutritional/body-size screening
  • Body surface area context for therapies that explicitly use BSA

القيود والسلامة

BMI is not a direct body-fat measure, while BSA-based medication dosing requires independent dose caps and protocol checks. Performance varies with population, prevalence, disease stage, treatment era, and local laboratory reference intervals. Avoid extrapolation to groups excluded from validation, and do not use a low score to dismiss concerning symptoms or a high score to prove a diagnosis.

Clinical decisions should incorporate contraindications, comorbidities, patient preferences, and current regional guidance. Pregnancy, childhood, older age, critical illness, altered physiology, and organ failure often require population-specific interpretation. Clinipocket stores no entered patient values; record clinically relevant results in the approved medical record.

  • BMI does not distinguish fat from muscle or describe fat distribution
  • Pregnancy, edema, amputation, athletes, and children require adapted interpretation

المعادلة

BMI = kg/m². Mosteller BSA = √[(height cm × weight kg)/3600]. Du Bois BSA = 0.007184 × height^0.725 × weight^0.425

تفسير النتائج

  • BMI <18.5 — Underweight: Possible nutritional risk. Assess nutrition and underlying causes.
  • 18.5–24.9 — Reference range: Metabolic risk still varies. Assess waist, fitness, and comorbidity.
  • 25–29.9 — Overweight: Risk depends on ethnicity and distribution. Contextual cardiometabolic assessment.
  • ≥30 — Obesity range: Higher population cardiometabolic risk. Person-centered evaluation and management.

المراجع

  1. Mosteller RD. Simplified calculation of body-surface area.
  2. Du Bois D, Du Bois EF. A formula to estimate surface area.

الأسئلة الشائعة

Should BMI cutoffs differ in Asian populations?

Some guidelines use lower action thresholds; follow the applicable regional standard.

Which BSA formula is preferred?

Mosteller is widely used for simplicity, but use the formula specified by the treatment protocol.

Can BSA automatically determine chemotherapy dose?

No. Verify regimen, organ function, dose caps, toxicity, and oncology protocol.