Bedridden Patient Height Calculator

How to calculate Bedridden Patient Height Calculator?

The calculator estimates a patient’s standing height from surrogate measurements (knee height or arm span) using linear prediction equations tailored to the chosen method.

Knee height (gender-specific): Height_cm = intercept_gender + slope_gender × knee_height_cm Arm span: Height_cm ≈ arm_span_cm

Using the Bedridden Patient Height Calculator calculator: an example

Example values: male patient, age 78, knee height measured as 50 cm.

Step-by-step calculation:

1. Select method: Knee height.
2. Measure knee height: 50 cm.
3. Apply the example equation (assumed for demonstration): Height_cm = 60 + 2.0 × 50 = 160 cm.
4. Optionally convert to inches: 160 ÷ 2.54 ≈ 63.0 in (round as needed).

Frequently Asked Questions

Which method is more accurate?

Both methods are useful. Knee height with gender-specific equations is often preferred when arm span may be affected by contractures or limb deformities.

How should I measure knee height for a bedridden patient?

Measure from the sole of the foot to the anterior surface of the femoral condyle (top of the knee) with the knee at approximately 90 degrees; if supine, stabilize the limb and use a rigid ruler or caliper.

Do age and gender affect the estimate?