This study aims to evaluate the possible effect of melatonin on prevention of cognitive dysfunction in the postoperative period of elderly patients undergoing transurethral resection of the prostate (TURP) under spinal anesthesia
TURP is the most common surgical procedure performed on male patients over 60 years of age to treat benign prostatic hyperplasia. One of the concerns, since it compromises the quality of life, is postoperative cognitive dysfunction. It can be due to TURP Syndrome or to other causes, like changing the routine and circadian rhythm for patients with more susceptibility. The investigators postulate that melatonin premedication and use during the perioperative period could avoid cognitive impairment in patients undergoing TURP surgery that didn't develop major complications, like TURP Syndrome. Since anesthestic technic could also influence the outcome of POCD, only patients undergoing spinal anesthesia were included in the study,
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
QUADRUPLE
Enrollment
104
melatonin 10 mg per os in the preoperative night and the immediate postoperative night and the first and second postoperative nights.
placebo taken per os in the preoperative night and the immediate postoperative night and the first and second postoperative nights
Hospital das Clinicas
São Paulo, São Paulo, Brazil
RECRUITINGearly postoperative cognitive dysfunction
a full battery of neuropsychological tests including FOME (Fuld Object memory evaluation test), Stroops colours world test, Trail making test and Wais-III were applied in the preoperative day and compared to the 30-postoperative day evaluation. A z score decline higher than 0,5 in two different domains defines an early postoperative cognitive dysfunction
Time frame: 30 days
late postoperative cognitive dysfunction
neuropsychological testings (WAIS - III, Trail Making Test, Stroop Colours Word Test and Fuld Object Memory Evaluation Test) were applied after 6 months of the surgery and the z score is compared to the preoperative evaluation- a z score decline higher than 0,5 in two different domains can define a late postoperative cognitive dysfunction
Time frame: 180 days
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