cranial index
A measurement ratio used to classify skull shape by comparing maximum width to maximum length.
Full Definition
The cranial index, also known as the cephalic index, is a standardized measurement used to quantify skull shape by calculating the ratio of maximum cranial width to maximum cranial length, multiplied by 100. Values between 75-80 indicate mesocephaly (normal), below 75 indicates dolichocephaly (long head), and above 80 indicates brachycephaly (broad head). This measurement is crucial in craniofacial surgery for diagnosing craniosynostosis, planning surgical interventions, and monitoring postoperative outcomes. The index helps surgeons determine the severity of skull deformities and guide treatment decisions.
Usage
Usage note: Express as a whole number, not as a decimal or percentage.
In Context
- "The patient's cranial index of 68 confirmed severe dolichocephaly requiring surgical correction." — preoperative assessment
- "Postoperative measurements showed improvement in cranial index from 68 to 76." — surgical outcome report