bi-ischial diameter

例句：

1. 1.The patient's bi-ischial diameter was measured to be 25 cm.
   患者的双侧直径为25厘米。
2. 2.The surgeon performed a bi-ischial incision for the procedure.
   外科医生为了手术进行了双侧切口。
3. 3. The measurement of the bi-ischial diameter is crucial for the diagnosis of osteoarthritis.
   双侧直径的测量对于诊断骨关节炎至关重要。