Blood loss and postoperative complications associated with transurethral resection of the prostate after pretreatment with dutasteride
ABSTRACT To determine whether pretreatment with dutasteride, a dual 5alpha-reductase inhibitor (5ARI), reduces surgical blood loss or postoperative complications in patients with benign prostatic hyperplasia (BPH) who undergo transurethral resection of the prostate (TURP).
This double-blind, randomized, placebo-controlled, multicentre study comprised 214 patients with BPH. Placebo was compared with dutasteride 0.5 mg/day 2 weeks before and after TURP, or 4 weeks before and 2 weeks after TURP. Surgical blood loss was measured using a haemoglobin photometer (HemoCue AB, Angelholm, Sweden) and postoperative adverse events were recorded. Microvessel density (MVD) was calculated by immunostaining and light microscopy of the prostatic chips.
Although dutasteride reduced serum dihydrotestosterone (DHT) by 86-89% in 2-4 weeks, and intraprostatic DHT was approximately 10 times lower than in the placebo group, the (adjusted) mean haemoglobin (Hb) loss during surgery was 2.15-2.55 g Hb/g resectate with no significant difference in blood loss between the groups either during or after TURP. Clot retention occurred in 6-11% and urinary incontinence in 14-15% of patients during the 14 weeks after TURP, with no difference between the groups. The MVD at TURP was also similar for all groups.
There were no significant reductions in blood loss during or after TURP or complications afterward with dutasteride compared with placebo, despite significant suppression of intraprostatic DHT. Blood loss and transfusion rates in the placebo group were lower than those previously reported in studies where there was a beneficial effect of a 5ARI, relative to placebo, on bleeding during TURP.
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ABSTRACT: To evaluate the efficacy and safety of bipolar transurethral resection of the prostate (TURP) in patients with a large prostate (>90 g), as a significant recent modification of TURP is the incorporation of bipolar technology, which uses the same technique as monopolar TURP but with normal saline as the irrigant.Patients and methodsForty patients with a prostate of >90 g and who were considered at risk for monopolar TURP were treated by bipolar TURP. The operative duration, resection time, resected tissue weight, resection rate, resection ratio, amount of irrigation fluid used, the decrease in intraoperative haemoglobin level, haematocrit and serum sodium levels, and the blood loss were recorded. The follow-up data were analysed.ResultsThe mean (SD) operative duration was 116.3 (25.52) min, the resection time was 106.5 (25.69) min, the resected volume was 78.9 (20.58) g, the decrease in haemoglobin levels was 1.67 (0.46) g/dL, the mean serum sodium decline was 2.60 (0.68) mmol/L, and the blood loss was 532 (101.2) mL. The blood loss/g of resected tissue was 6.85 (0.70) mL. The mean (SD) postoperative bladder irrigation time was 2.0 (0.32) days, the catheterisation time was 3.25 (0.55) days and the postoperative hospital stay was 3.25 (0.55) days.Conclusion Bipolar technology makes it possible to use TURP to treat patients with very large prostates and who are at risk when treated by the standard monopolar technology, with a satisfactory safety profile and with favourable efficacy.11/2014; 12(4). DOI:10.1016/j.aju.2014.10.003
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ABSTRACT: Finasteride is an antiandrogen that inhibits 5-α-reductase, an enzyme that converts testosterone to dihydrotestosterone. Finasteride significantly reduces intraoperative bleeding when 10 mg/d is administered for 60 days before transurethral resection of the prostate. Our double-blind, randomized, placebo-controlled study evaluated 200 patients with benign prostatic hyperplasia who underwent transurethral resection of the prostate. We compared a placebo group (n = 100) with a group (n = 100) administered 5 mg of finasteride twice a day for 8 weeks. We intended to demonstrate the mechanisms and effects of finasteride compared with those of vascular endothelial growth factor, and to evaluate CD34, an immunohistochemical marker of blood vessel density in the prostate. Our results indicated a lower average microvascular density and vascular endothelial growth factor index for hypertrophic prostate in the finasteride group than in the placebo group.Current Prostate Reports 08/2008; 6(3):123-127. DOI:10.1007/s11918-008-0019-x
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ABSTRACT: An experimental study to investigate the critical flow of refrigerants through short tube orifices has been performed by measuring the mass flowrates and pressure profiles along the short tube orifice. Eight critical flow models have been examined and their results compared with the experimental data for HCFC22 and HFC134a. These models include four homogeneous equilibrium models, two homogeneous frozen models, and two non-homogeneous equilibrium models. The data indicate that the flow was choked when downstream pressures were lower than the saturation pressure corresponding to the upstream temperature. The observed flows through short tube orifices included a lack of equilibrium due to short time of expansion and homogeneous mist flow at the exit plane. These flow trends would be more consistent with the basic assumptions of the homogeneous frozen models. Based on the comparison of the existing critical flow models and experimental data, the homogeneous frozen models showed the best agreement with the measured data except for exit qualities below 0.06.International Journal of Refrigeration 01/1995; 18:447-455. DOI:10.1016/0140-7007(95)93785-I · 1.70 Impact Factor