Ideal and dosing weight methods compared
This comparison describes how the methods differ; it does not declare one universally better — the choice depends on the patient and clinical context.
| Ideal body weight | Adjusted body weight | Lean body weight | PBW / tidal volume | |
|---|---|---|---|---|
| Method | Devine, Robinson, Miller and Hamwi equations | Adjusted body weight with correction factor 0.4 | Janmahasatian lean body weight (2005) | ARDS Network (2000) |
| Inputs | Sex، Height | Sex، Height، Weight | Sex، Height، Weight | Sex، Height |
| Population | Adults with a height of 152 cm (60 in) or more. | Adults whose actual weight is above ideal body weight; height 152 cm or more. | Adults aged 18 and over. | Adults receiving mechanical ventilation. |
| Key limitations | These equations estimate a reference weight; they are not a weight-loss target. They ignore age, body frame and muscle mass. | The correct dosing weight is drug-specific; check the product information or local protocol. Intended for adults; children need an age- and drug-appropriate dosing method. | An estimate; body composition scans measure it directly. Developed in adults; not for children. | Ventilator settings are a clinical decision; this tool only performs the arithmetic. |
| Reference | Devine BJ. Gentamicin therapy (1974) | Traynor AM, Nafziger AN, Bertino JS Jr. Aminoglycoside dosing weight correction factors for patients of various body sizes (1995) | Janmahasatian S, Duffull SB, Ash S, Ward LC, Byrne NM, Green B. Quantification of lean bodyweight (2005) | Acute Respiratory Distress Syndrome Network. Ventilation with lower tidal volumes as compared with traditional tidal volumes for acute lung injury and the acute respiratory distress syndrome (2000) |
| Version | 2.1.0 | 1.0.1 | 1.0.0 | 1.0.1 |