Understanding the Schnur Sliding Scale
The Schnur Sliding Scale helps estimate a tissue removal threshold for reduction mammaplasty review. It connects body surface area with a gram value per breast. Many reviewers use that value as one part of a medical necessity file. The scale is not a diagnosis. It is also not a promise of approval. It is a structured reference that supports clearer planning.
Why Body Surface Area Matters
Body surface area, or BSA, adjusts height and weight into one body size measure. Taller or heavier patients usually have a higher BSA. The Schnur table then assigns a higher gram threshold. This calculator lets you choose common BSA methods. Mosteller is widely used because it is simple. Du Bois and Haycock are included for comparison. Different formulas can move the final BSA slightly.
How the Result Should Be Read
The result shows BSA, the matching table point, and the required grams per breast. It also compares the planned left and right removal amounts. A positive surplus means the planned amount is above the selected threshold. A shortfall means the plan is below it. The average value helps review symmetry, but each side should still be checked.
Advanced Options
The calculator can round up to the next table point. This is a conservative method. It can also use interpolation between two points. Interpolation gives a smoother estimate, but policies may prefer exact table values. The extended table option includes extrapolated values above the original range. Use that setting only when a reviewer accepts extended values.
Practical Use
Enter accurate height and weight. Then add the expected grams for each breast. Review the notes before saving. Export a CSV for records. Export a PDF for a simple summary. Share results with a qualified clinician or insurance reviewer. Final decisions depend on symptoms, documentation, photographs when requested, policy language, and professional judgment.
Important Limits
The scale does not measure pain, posture, skin changes, or failed conservative care. Those details often matter in real claims. Policies may also ask for mammography, office notes, duration of symptoms, and surgeon estimates. Treat this tool as a calculation aid. Do not treat it as medical advice. Use current policy wording before filing any formal request.