Brainlab RT/RS Hardware User's Manual page 55

IMMOBILIZATION HARDWARE
How to Affix the Stereotactic Headring
Steps
Warnings: Fixation Accuracy
Position the headring so that the localizer does not disturb the patient's nose.
If the patient moves when fixed to the headring and applies force to the device, the fixation
is no longer accurate.
Hardware User Guide Rev. 4.9 RT / RS Stereotactic Hardware
1. Position the headring onto the (sitting) patient using the velcro strap.
2. Loosen the locking screws of the posts to enable adjustment.
Remove the headring temporarily to prepare the pin sites.
3.
NOTE:The surgeon is responsible for maintaining appropriate care of the pin sites.
They should be shaved and cleaned using a disinfectant.
Local anesthesia may be applied after replacing the headring at its final position.
4.
NOTE:Generally, local anesthesia is applied through the threaded holes of the posts.
This insures that the projected pin entry sites are properly anesthetized.
5. Cover the tips of the pins with an antibacterial or iodine-enriched ointment.
6. Insert the pins into the posts pointed downward, toward the skin.
7. Verify that the headring position is correct.
8. Carefully tighten the pins until they penetrate the bone.
Tighten the fixation pins crosswise, one after the other, and not more than one revolu-
tion at a time (see Figure 26 for pin tightening order) to avoid lateral forces to the other
pins.
9.
NOTE:Only use torque wrenches delivered with the headring to tighten the fixation
pins with a reproducible and measurable force. This prevents the user from applying
too much torque to the fixation pins.
10. Remove the velcro strap.
③
② ④
Figure 26
①
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