Synthes The Titanium Femoral Nail System, Technique Manual

Page: 26 / 78

Note:
There is no need to calculate bolt
or screw length; the calibrated
drill bit provides a direct measure-
ment. However, since drill bit
position directly represents locking
bolt or locking screw position in
bone, the locking bolt or locking
screw will be too long if the drill
bit is overinserted, or if the drill
sleeve is not pressed down to the
lateral cortex.
To minimize measuring errors,
use the ‘pause and consider’
method: Temporarily stop the drill
when the bit hits the far cortex.
Press the drill sleeve to the lateral
cortex, continue drilling until the
bit just penetrates the far cortex,
and read the direct locking bolt
or locking screw length at the
back of the drill sleeve.
To use the depth gauge,
remove the drill sleeve,
measure through the
protection sleeve using
standard depth gauge
technique, and
add 2 –4 mm
to the reading to ensure thread
engagement of the far cortex.
Insert the locking bolt or
locking screw through the
protection sleeve using the
screwdriver.
Repeat the procedure for a
second proximal locking bolt
or locking screw.
Insert the locking bolt or
locking screw
25
ST
ANDARD
LOCKING