OBJECTIVE The aim of this prospective study was to detect risk factors for visual impairment or changes in vision following spinal fusion surgery. METHODS A total of 68 patients aged 18-65 years, scheduled for posterior spinal fusion surgery, were included. Ophthalmic examinations were performed by an ophthalmologist on the day before surgery and repeated… (More)
Lack of an intermediary piece that should have been placed between the pin and spring resulted in skull penetration due to a rapid waste in the spring's compensatory capacity. Checking integrity of internal pieces should be performed regularly. Designing intermediary piece and spring as a single piece might increase safety.