You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Insal-Salvati index is used for ? and explain in detail?
Ans. is 'b' i.e., Patella Two radiological indices are commonly used for determining the position of patella - Insall-Salvati index It is the ratio of patellar tendon length to patella length. Normally it is 1-0. An index of 1.2 or more is seen in patella alta (high riding patella). An index of 0.8 or less is seen in patella baja (low lying patella). Blackbume-Peel lindex It is the ratio of (i) the distance of tibial plateau to inferior aicular surface of patella (numerator), to (ii) length of aicular surface of patella (denominator). Normally it is 0.8. An index of 1 or more is seen in patella alta.