Caton-Deschamps Index (Patellar Height)
Caton-Deschamps index of patellar height (Caton 1982): index = A / B, where A = distance from the inferior patellar articular surface to the anterosuperior tibial plateau and B = patellar articular surface length (mm),…
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Distance A
- 18 mm
- Length B
- 12 mm
Result: Caton-Deschamps 1.5 — patella alta.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Thresholds
- normal ~0.6-1.2; < 0.6 patella baja (infera); > 1.2 patella alta.
What you enter
- Distance A (inferior articular surface to tibial plateau, mm)
- Length B (patellar articular surface, mm)
How this is calculated
- Formula
- index = A / B, A = inferior patellar articular surface to anterosuperior tibial plateau, B = patellar articular surface length (mm).
Caton J, Deschamps G, Chambat P, Lerat JL, Dejour H. Patella infera. Apropos of 128 cases. Rev Chir Orthop Reparatrice Appar Mot. 1982;68(5):317-325. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.