B. Braun Aesculap S4 Cervical, Instructions For Use/Technical Description

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5
en
2.3.1 Preparing holes for S
4
C screws with navigation
WARNING
Risk of injury to patients due to incorrect navigation!
►
Observe the combination specifications
►
To center the screw holes in the cortical bone layer for the self-tapping
S
4
C screws
Ø
3.5 mm with navigation, use the S
4
C navigated drill guide
Ø
3.5 mm F only together with S
4
C centering tool for S
4
C navigated drill
guide P .
To center the screw holes for the self-tapping S
4
C screws
Ø
4.0 mm with
navigation, use the S
4
C navigated drill guide
Ø
4.0 mm G only together
with S
4
C centering tool for S
4
C navigated drill guide Q .
S
4
C navigated drill guide G and centering tool Q have a purple marking on
the shaft for the self-tapping S4C screws
Ø
4.0 mm, see Fig. 1.
Fig. 1 Purple markings on S
4
C navigated drill guide and centering tool
To center the screw holes in the cortical layer without navigation, see
instructions for use of S
4
Cervical instruments (TA011984).
WARNING
Risk of damage to the spinal cord, nerve roots, adjacent intervertebral
space or soft tissue when inserting the centering tool without drill
guide!
►
Use the centering tool only with drill guide FW664R/FW665R.
CAUTION
Restriction of the function of the centering tool or inaccurate reading
of the depth gage!
►
Do not repoint the centering tool.
►
Replace blunt centering tools.
►
For mounting the reflective Brainlab marker spheres 4 onto Aesculap
star unit H , see Brainlab user manual.
►
Retract and hold locking sleeve 1 of the Aesculap star unit H against
the spring pressure in the direction of the arrow.
►
Push the Aesculap star unit H onto adapter 2 of the S
4
C drill guide F / G .
When doing so, ensure that the pin of the adapter 3 engages in the
recess on the star unit.
►
Release locking sleeve 1 .
Fig. 2 Mounting the Aesculap star unit on S
4
C drill guide
FW664R/FW665R
►
Prior to each use, check and/or validate the instrument with the
Brainlab instrument calibration matrix version 4, see Brainlab user
manual. When doing so, ensure that the centering tool for navigated
drill guide
P / Q is removed.
►
To ensure that the camera has an unrestricted view of the reflective
marker spheres, loosen knob
6 on the S
4
C handle of the S
4
C drill guide
F / G and rotate Aesculap star unit H to the desired position, see Fig. 2.
►
Once the desired position is reached, tighten knob 6 again.
►
Adjust the center punch depth by turning the depth stop 5 on the S
4
C
drill guide F / G . The maximum depth is 6 mm.
►
Insert S
4
C centering tool P / Q into S
4
C drill guide F / G .
►
Check the pre-set center punch depth with a caliper (e.g. AA845R).
►
To open the cortical bone, press S
4
C centering tool to the preset depth
under control with the Brainlab navigation system.
2.3.2 Drilling holes for the S
4
C screws
DANGER
Risk of injury from an incorrectly placed hole or a hole that is too
deep!
►
Do not sharpen the drill, as this would cause imprecise or incorrect
readings on the depth gauge.
►
Replace blunt drills with new ones.
The drill is applied with a S
4
C drill guide and drilled in either manually with
the drill handle (FJ839R) or with a motor system with the Aesculap Intra-
handpiece (e.g. GD450R/GD456R).
Assembling the drill and drill handle (for manual drilling only)
DANGER
Risk of damage to the spinal cord, nerve roots, adjacent intervertebral
space or soft tissue through incorrect drilling!
►
Use only the correct S
4
C drill guides to drill holes. Insert drill only
with the correct drill guide.
►
Before drilling, the pre-set drill length must be checked with a cal-
iper (e.g. AA845R, Caspar instrument for anterior cervical fusion).
Q G
1
4
F/G
H
5
6
P/Q
2
3