A 10-mm size Cephalomedullary Nails can be used in Geriatric
The need for reoperation of geriatric intertrochanteric hip fractures treated with 10-mm cephalomedullary nails versus those treated with nails bigger than 10 mm was investigated in a study. All patients aged 60 and up with cephalomedullary fixation for an intertrochanteric femur fracture were included.

--There were no significant differences in reoperation rates when the 10-mm cohort was compared with an aggregate cohort of all nails larger than 10 mm.
--This result was true for both all-cause reoperation and noninfectious reoperation.
--There was no difference between cohorts in regards to age, gender, or fracture pattern.

Finally, in patients aged 60 and older with intertrochanteric femur fractures, a 10-mm cephalomedullary nail can be utilized instead of a larger diameter fixation while maintaining a comparable rate of reoperation.

Source: https://journals.lww.com/jorthotrauma/Abstract/2021/06000/Does_Size_Matter_for_Cephalomedullary_Nails_in.8.aspx