
3
Safe handling and preparation
CAUTION
Federal law restricts this device to sale by, or on
order of a physician!
The S4Spondylolisthesis reduction instrument requires
the surgeon to have practical experience with spine
stabilization systems and a good biomechanical
knowledge of the unstable spine. The decision as to
whether, and to what extent reduction is required is
dependent on the indication and is the responsibility of
the treating surgeon. In order to ensure safe reduction,
the force may only be applied in small doses and the
spread may not exceed the height of the physiological
disc space.
The S4Spondylolisthesis reduction instrument should
be used exclusively with implants of the Aesculap
S4Spinal System. For specific information about
S4implants and instruments, please contact your Aes-
culap Service Agency or Aesculap directly.
►Ensure that the product and its accessories are
operated and used only by persons with the requi-
site training, knowledge, or experience.
►Read, follow, and keep the instructions for use.
►Use the product only in accordance with its
intended use, see Intended use.
►Clean the new product after removing its transport
packaging and prior to its initial sterilization (auto-
matic).
►Store any new or unused products in a dry, clean,
and safe place.
►Prior to each use, inspect the product for loose,
bent, broken, cracked, worn, or fractured compo-
nents.
►Do not use the product if it is damaged or defec-
tive. Set aside the product if it is damaged.
►Replace any damaged components immediately
with original spare parts.
Safe operation
Screw placement
Note
Screw placement is critical. It is recommended to place
the screws parallel in the saggital plane and to make
sure the screws are not too laterally deviated.
►Within the limits of the patient's anatomy, place
the screws in the cephalad vertebral body parallel
to its superior endplate and as parallel to each
other as possible.
►Place the caudal vertebra screws so that they are
parallel to the cephalad vertebra screws in both
planes (contrary to the standard convergent man-
ner).
Placement of screws in this way allows for optimal
operation of the reduction instrument and provides
for easier rod placement.
WARNING
Trauma to the spinal columns
and nerve roots due to incor-
rect application!
►Monitor under image
intensifier control and/or
monitor spinal cord.
►Avoid over-distraction or
overreduction.
►Avoid over-tightening the
repositioning device to the
pedicular screws.
WARNING
Risk of injury and/or malfunc-
tion!
►Always carry out a func-
tion check prior to using
the product.