7
►
Retract and hold locking sleeve
8
against the spring pressure.
►
Push the S
4
C handle FW067R/FW165R onto the shaft of the S
4
C
tapper
A
.
►
Release locking sleeve
8
, see Fig. 6.
Check that the S
4
C handle is engaged.
Fig. 6
Mounting the reference star unit (“pre-calibrated”) and S
4
C han-
dle onto the S
4
C tapper
►
Prior to each use, check and/or validate the instrument with the
Brainlab instrument calibration matrix version 4, see Brainlab user
manual.
►
To tap the thread, hold the reference star unit
B
at the planned inden-
tations with one hand, and with the other hand screw in S
4
C handle
C
slowly and steadily under control with the Brainlab navigation system,
until the required depth is reached.
►
Use the scale behind the retractable sleeve of the S
4
C tapper to read
the depth during the tapping process, see Fig. 7.
Fig. 7
Tapper with readable thread depth
Position S
4
C screw under navigation and temporarily fix
it in place
►
To position S
4
C screws
∅
3.5 mm and
∅
4 mm with navigation, use
S
4
C navigated screwdriver
D
.
►
For mounting the reflective Brainlab marker spheres
4
onto the refer-
ence star unit ML
E
, see Brainlab user manual.
►
Push the reference star unit ML
E
onto the shaft
10
of the S
4
C
screwdriver
D
. Ensure that the star unit is securely fitted onto the shaft
of the S
4
C screwdriver.
Note
The star unit can be rotated on the shaft of the S
4
C screwdriver.
►
Retract and hold locking sleeve
8
against the spring pressure.
►
Push the S
4
C handle FW067R/FW165R onto the shaft of the S
4
C screw-
driver
D
.
►
Release locking sleeve
8
, see Fig. 8.
Check that the S
4
C handle is engaged.
Fig. 8
Mounting the reference star unit (“calibration with ICM 4”) and
S
4
C handle (FW067R or FW165R) onto the S
4
C screwdriver
Note
The S
4
C screwdriver is fitted with a self-retaining function to prevent the
S
4
C screw from falling out when it is passed to the surgeon.
►
Retract and hold the holding sleeve
12
on the S
4
C screwdriver
D
, see
Fig. 9.
►
Insert the tip of the S
4
C screwdriver
D
fully into the hexagon of the
screw
11
.
WARNING
Risk of injury to the patient!
►
Before use, ensure that the selected instrument
has been correctly assembled.
►
Ensure that the arrow on the underside of the
reference star unit (pre-calibrated) is pointing
to the tip of the tool.
4
9 8
7
B
A
C
B
A
DANGER
Risk of injury to the patient!
►
Use S
4
C screwdriver only with reference star
unit ML for manual calibration.
►
If you change screws, perform the calibration
again.
4
E
D
8
10
C
E
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