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Visual evoked potentials and visual acuity after transurethral resection of the prostate
Author(s) -
Mantha S.,
Rao S. M.,
Singh A. K.,
Mohandas S.,
Prakas Rao B. Surya,
Joshi N.
Publication year - 1991
Publication title -
anaesthesia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.839
H-Index - 117
eISSN - 1365-2044
pISSN - 0003-2409
DOI - 10.1111/j.1365-2044.1991.tb11694.x
Subject(s) - medicine , visual acuity , ophthalmology , prostate , visual evoked potentials , evoked potential , therapeutic irrigation , snellen chart , anesthesia , surgery , audiology , cancer
Summary Changes in visual evoked potentials, visual acuity, blood ammonia levels and serum electrolytes (Na + and K + ) after transurethral resection of the prostate using glycine as an irrigating fluid performed under subarachnoid block were studied in 12 patients, in the pre‐operative and immediate postoperative periods. Visual evoked potentials (p 100 latency), recorded by shift of a checkerboard pattern, increased significantly from a pre‐operative value of mean (SEM) 101.18 (1.63) msec in the right eye, and 102.5 (1.47) msec in the left eye to 108.91 (1.8) msec (p < 0.01) and 108.08 (2.53) msec (p < 0.01) respectively in the postoperative phase. There were no changes in visual acuity as assessed by a Snellen's chart, blood ammonia levels and serum electrolyte concentrations. The amount of glycine used intra‐operatively for irrigation ranged from 3 to 31 litres.