Accurate Weight Measurement for Obese Patients: Methods & Best Practices

Weighing a patient who is obese and too large for a scale:

Accurate weighing of obese individuals helps evaluate their current status, monitor weight trends, and guide treatment decisions. Here are two common methods used to weigh obese patients who exceed the capacity of a traditional scale:

1. Bed Scale or Wheelchair Scale:

- If available, use a bariatric bed scale with a higher weight capacity. These scales are designed to accommodate individuals with higher weights.

- Alternatively, a wheelchair scale can be used. The patient sits on the scale while in their wheelchair, and the scale measures their combined weight. The weight of the wheelchair must be subtracted to obtain the patient's weight.

2. Estimation Using Girth Measurements:

- This method uses body measurements to estimate an individual's weight. It is commonly known as the "Garrow formula."

- Measure the patient's waist and hip circumference using a measuring tape. Ensure the tape is placed horizontally around the narrowest part of the waist and the widest part of the hips.

- For men: Estimated weight (kg) = (Waist circumference in cm) x (Hip circumference in cm) / 288

- For women: Estimated weight (kg) = (Waist circumference in cm) x (Hip circumference in cm) / 265

Remember that these methods may provide an estimated weight rather than a precise measurement. Consult with a healthcare professional to determine the most appropriate method for weighing an obese patient.