Iatrogenic sciatic nerve injury in eighteen dogs and nine cats (1997-2006).
OBJECTIVE
To report clinical features associated with iatrogenic peripheral nerve injury in dogs and cats admitted (1997-2006) to a referral teaching hospital.


METHODS
Retrospective study.


METHODS
Dogs (n=18), 9 cats.


METHODS
Patients had acute signs of monoparesis attributable to sciatic nerve dysfunction that developed after treatment. Neurologic examination and electrodiagnostic testing were performed. Surgical therapy was used for nerve entrapment and delayed reconstructive surgery used in other cases.


RESULTS
Of 27 nerve injuries, 25 resulted from surgery (18 with treatment of pelvic injuries). Iliosacral luxation repair resulted in tibial (4 cats) and peroneal (3 dogs) nerve dysfunction. Other causes were intramedullary pinning of femoral fractures (3), other orthopedic surgery (cemented hip prosthesis [2] and tibial plateau-leveling osteotomy [1]), and perineal herniorrhaphy [1]. Nerve injury occurred after intramuscular injection (1 cat, 1 dog). Immediate surgical treatment was removal of intramedullary nails, extruded cement, or entrapping suture. Delayed nerve transplantation was performed in 2 dogs. Within 1 year, 13 patients recovered completely, clinical improvement occurred in 7, and there was no improvement in 7. Five of the 7 dogs that did not recover had acetabular or ilium fracture.


CONCLUSIONS
Iatrogenic sciatic nerve injury occurred most commonly during treatment of pelvic orthopedic diseases and had a poor prognosis. Clinical variation in sciatic nerve dysfunction in dogs and cats can be explained by species anatomic differences.


CONCLUSIONS
Iatrogenic sciatic nerve injury leads to severely debilitating locomotor dysfunction with an uncertain prognosis for full-functional recovery.
Forterre
Franck
F
Small Animal Clinic, Department of Surgery and Neurology, University of Berne, Berne, Switzerland. frank.forterre@kkh.unibe.ch
Tomek
Ales
A
Rytz
Ulrich
U
Brunnberg
Leo
L
Jaggy
Andre
A
Spreng
David
D
D000818:Animals; D002371:Cat Diseases / Q000209:etiology* / Q000601:surgery; D002415:Cats; D004283:Dog Diseases / Q000209:etiology* / Q000601:surgery; D004285:Dogs; D005260:Female; D007049:Iatrogenic Disease / Q000662:veterinary*; D008297:Male; D009408:Nerve Compression Syndromes / Q000209:etiology / Q000601:surgery / Q000662:veterinary*; D009460:Neurologic Examination / Q000662:veterinary; D010388:Pelvis; D011379:Prognosis; D012189:Retrospective Studies; D012584:Sciatic Nerve / Q000293:injuries* / Q000601:surgery; D020426:Sciatic Neuropathy / Q000209:etiology / Q000601:surgery / Q000662:veterinary*; D016896:Treatment Outcome