Integra MAYFIELD A1059 Instruction Manual page 7

WARNING:
Never resharpen skull pins. Dull or bent
pins should be replaced.
NOTE:
When using MAYFIELD Disposable or Reusable Skull
Pins, follow instructions supplied with the product.
2. Fixation to Patient
WARNING:
Failure to properly position patient and
to fully tighten and secure all adjustable
portions of this or any similar device may result in
skull pin slippage and serious patient injury, such as
scalp laceration, skull fracture or even death.
WARNING:
MAYFIELD Skull Clamp fixation devices
are not recommended for use on children
under five (5) years of age and extreme caution
should be exercised in pediatric cases because of
the thin skull.
WARNING:
The skull clamp must be applied along
the centerline of the patient's head with
pins entering the skull perpendicularly. See Table 1.
Failure to properly position the skull clamp on the
patient's head could result in patient injury such as
scalp laceration due to skull pin slippage. Failure to
properly position patient and to fully tighten and
secure all adjustable portions of this or any similar
device may result in skull pin slippage and serious
patient injury, such as scalp laceration, skull fracture
or even death.
a. Position the patient so that the two pins on the
rocker arm of the skull clamp are equidistant
from the centerline of the head (see Figure 2).
CAUTION:
Avoid the areas of the frontal sinus,
temporal fossa, major blood vessels,
nerves, previously restored or abnormally thin bone.
b. Pull the plunger out and slide the two halves of
skull clamp apart to adjust to proper width.
c. Place the clamp in the desired position, normally
perpendicular to the floor for supine or prone
patient positions and parallel to the floor for
sitting patient positions (see fig. 6).
d. The rocker arm is locked in place by rotating the
index knob clockwise 60 degrees until the arrow
on the index knob is aligned with the arrow on
the aluminum arm. The rocker arm is now fully
locked (See Service Note 2).
e. Seat the skull pins securely into the cranial table.
Skull pins should enter the scalp at a 90 degree
angle, perpendicular to the head.
NOTE:
The single pin holder and torque screw give the
surgeon a visual readout of 20/40/60/80 pounds of
clamping force (see fig. 3).
f. Clamping force is increased by turning the
torque screw clockwise (See Service Note 3).
Turn the torque screw to the desired graduation,
then back off one quarter turn.
NOTE:
A minimum of 60 lbs. of pressure must be applied
to the skull clamp. An additional pressure range
reaching 80 lbs. is available if desired.
WARNING:
Pressure in excess of 80 lbs. is NOT
RECOMMENDED.
3. Mounting of the Skull Clamp
a. Insert threaded screw of small sunburst fitting
on the swivel adaptor into the threaded hole of
the MAYFIELD Base Unit's Transitional Member.
b. Turn the mounting knob clockwise and tighten.
c. Insert torque screw of the large sunburst ratchet
on the swivel adaptor into the threaded hole on
the skull clamp.
d. Turn the torque screw clockwise and tighten.
Make certain to securely attach the base unit to the
operating room table.
WARNING:
Failure to properly position patient and
to fully tighten and secure all adjustable
portions of this or any similar device may result in
skull pin slippage and serious patient injury, such as
scalp laceration, skull fracture or even death.