Integra MAYFIELD A3059 Manuel D'instructions page 13

6. Increase Skull Clamp force by advancing the Torque Screw to a desired setting, indicated on
the visual readout, then back off one quarter turn.
Note: The Torque Screw provides the surgeon with a visual display of the clamping force applied. Each
scribed line indicates a 20 lbs. (89 N) increment of force. Refer to Table 2 below:
Torque Screw
Line Indicator
1
2
3
4
Table 2 Torque Screw Line Indicator/Clamping Force
Note: To achieve independent fixation for adults, it is recommended that a minimum of 60 lbs. (267 N) of
force be applied by the Skull Clamp. An additional force range reaching 80 lbs. (356 N) is available if desired.
7. Once the force is applied to the clamp and the patient is positioned for surgery, the Index
Locking Knob should be turned to the locked position shown in Figure 4.
Never exceed 80 lbs. (356 N) of force.
Over-tightening the Index Locking Knob can result in damage to the skull clamp.
Clamping Force
20 lbs. (89 N)
40 lbs. ( 178 N)
60 lbs. (267 N)
80 lbs. (356 N)
CAUTION!
CAUTION!
Figure 7 Standard Torque Screw
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