Info

a Patients with multiple sclerosis excluded. From ref. 21, copyright 1995 W. B. Saunders.

a Patients with multiple sclerosis excluded. From ref. 21, copyright 1995 W. B. Saunders.

self-limiting and resolved within months. Although corneal anesthesia can cause keratitis and blindness, this complication is rare. Blindness from loss of corneal sensation may be prevented by the use of soft contact lenses, early oph-thalmologic treatment, eye care, and tarsorrhaphy when necessary.

Motor Paresis

The use of electrical stimulation as a localizing technique may prevent injury to the motor division of the trigeminal nerve. Motor weakness, which occurred in 16% of patients treated with RFL, was reduced with stimulation tests and manipulation of electrode placement (18). The motor division rootlets are located rostral and medial to the sensory roots and cross under the ganglion (22). When stimulation testing results in masseter contraction, the electrode should be repositioned. Lateral rotation of the electrode reduces the occurrence of motor deficits. Motor losses are usually partial and recover over time.

Table 3

Percentage of Patients Suffering Complications After Percutaneous Radiofrequency Rhizotomy: Comparison of Curved vs Straight Electrode

% of patients

Table 3

Percentage of Patients Suffering Complications After Percutaneous Radiofrequency Rhizotomy: Comparison of Curved vs Straight Electrode

% of patients

Complication

Curved electrode (n = 500)

Straight electrode (n = 700)

Dysesthesia

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