Phenol neurolysis for severe chronic nonmalignant pain: is the old also obsolete?
OBJECTIVE
Our purpose was to reassess the effectiveness of phenol 4% in aqueous solution for neurolysis in patients with severe chronic nonmalignant pain syndromes who did not achieve adequate pain control (visual analog scale [VAS] <or=3) with conventional pain treatment.


METHODS
Forty-two patients with severe nonmalignant pain persisting for 6 months or longer were followed for more than 6 months after phenol neurolysis in this prospective observational study. All patients had previously received narcotic drugs, with or without nonsteroidal anti-inflammatory agents or adjuvants, without adequate pain relief. An aqueous solution of phenol 4% was used for chemical neurolysis. A fluoroscopically guided technique was used for chemical lumbar sympathectomy, medial branch destruction, and sacroiliac injections. Anatomic-landmarks technique was used for intercostal neurolysis, greater occipital nerve destruction, genitofemoral neuroablation, and paracoccygeal infiltration.


RESULTS
Good pain relief (VAS <or=3) was achieved in 35 patients after neurolysis with phenol, and the mean VAS decreased from 8.74 +/- 1.08 (range 7-10) before treatment to 1.93 +/- 2.41 after treatment (P<0.0001). The mean VAS for assessment of the quality of pain relief after phenol neurolysis was 8.4 +/- 2.39, ranging from 0 (no relief at all) to 10 (complete relief ). No major complications were seen.


CONCLUSIONS
The use of phenol 4% in aqueous solution is an effective and safe technique for neurolysis. Because of the potential risk of flaccid paralysis, this technique should be used in selected cases, far removed from motor nerves and the spinal cord.
Weksler
Natan
N
Division of Anesthesiology and Critical Care Medicine, Soroka Medical Center, Faculty of Health Sciences, Ben Gurion University of the Negev, Beer Sheva, Israel. weksler@bgumail.bgu.ac.il
Klein
Moti
M
Gurevitch
Boris
B
Rozentsveig
Vsevolod
V
Rudich
Zvia
Z
Brill
Silviu
S
Lottan
Michael
M
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002908:Chronic Disease; D003287:Contrast Media; D005260:Female; D005471:Fluoroscopy; D005500:Follow-Up Studies; D006801:Humans; D007479:Iopamidol; D008297:Male; D008875:Middle Aged; D010146:Pain / Q000175:diagnosis; D059408:Pain Management; D010147:Pain Measurement; D019800:Phenol; D011446:Prospective Studies; D013565:Sympatholytics
D003287:Contrast Media; D013565:Sympatholytics; D019800:Phenol; D007479:Iopamidol