Credit for the conception of percutaneous cordotomy belongs to N[ullan and his associates of Chicago. 2 However, their technique utilizes a radioactive-tipped needle, and, since isotopic needles are not generally available, the method cannot be used by all neurosurgeons. It is important that a method be available which could be applicable in any neurosurgical unit, since the percutaneous approach is the most acceptable procedure yet to be developed. It is simple to perform, it is well tolerated by the patient, and it may be offered to those in all states of health, including patients who otherwise could not or should not be subjected to a major operative procedure. This report describes a modification of the Mullan technique which utilizes standard equipment, available commercially or easily built, and portable instrumentation. It appears to approach the practical ideal for generalized use.
The semiautomated hand-held device MED results were lower than that of the conventional panel method and may prolong the treatment course by 2-3 treatments. The hand-held tester is a fast and reproducible method, and may allow more phototherapy units, limited by staff and time, to do MED testing.
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