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Ideal & Adjusted Body Weight

Devine ideal body weight; adjusted body weight (ABW) for dosing in obesity; Janmahasatian lean body weight.

IBW (kg) = 50 [M] or 45.5 [F] + 2.3 × inches over 60 · ABW = IBW + 0.4 × (actual − IBW)
IBW
65.9kg
Adjusted BW
75.6kg
Lean BW
62.2kg

General dosing tips: succinylcholine → TBW; rocuronium → IBW; propofol induction → LBW, maintenance → TBW; remifentanil → IBW; opioids → titrate.

References & Further Reading

  1. 1
    Journal

    Devine BJ. Gentamicin therapy. Drug Intell Clin Pharm. 1974;8:650-655.

  2. 2
    Journal

    Janmahasatian S, Duffull SB, Ash S, Ward LC, Byrne NM, Green B. Quantification of lean bodyweight. Clin Pharmacokinet. 2005;44(10):1051-1065.

Citations are provided to direct further study. Always check the most current edition of guidelines and society recommendations — the information in this chapter is a teaching summary, not primary source material.