A short-term evaluation of the safety and the efficacy of bipolar transurethral resection of the prostate in patients with a large prostate (>90 g)

Peer review under responsibility of Arab Association of Urology.

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✰ This journal is partially supported by Karl Storz GmbH. That support had no influence on the peer-review of this paper, which was entirely independent of Karl Storz.

Figures & data

Figure 1 Cutting and vaporising bipolar loops.

Figure 2 26-F continuous-flow resectoscope, working element, cutting and vaporising loop electrodes, and bipolar cord.

Table 1 Baseline data and values immediately after TURP.

Variable	Mean (SD, range)
Baseline
Prostate size (g)	124.4 (34.5, 95–220)
IPSS	27.0 (3.78, 22–33)
Qmax (mL/s)	6.20 (2.07, 3.5–9.2)
PVR (mL)	195.7 (119.2, 50–350)
PSA (ng/dL)	4.66 (2.27, 0.7–8.8)
Haemoglobin (g/dL)	14.20 (0.64, 13.2–15.8
Haematocrit (%)	41.59 (2.15, 39.1–46.9
Serum Na+ (mmol/L)	139.05 (3.36, 134–145)
Immediately after TURP
Haemoglobin (g/dL)	12.53 (0.72, 11.1–14.2)
Haematocrit (%)	36.91 (2.04, 34.2–41.4)
Serum Na+ (mmol/L)	136.45 (3.63, 131–143)
Decline in:
haemoglobin (g/dL)	1.67 (0.46, 1.2–2.8)
haematocrit (%)	4.68 (1.15, 3.3–7.5)
serum Na+ (mmol/L)	2.60 (0.68, 2–4)
Calculated blood loss (mL)	532.0 (101.2, 417–777)
Blood loss rate (mL/min)	5.06 (0.59, 4.1–6.3)
Blood loss/g resected tissue (mL/g)	6.85 (0.70, 5.24–8.04)
Bladder irrigation time (days)	2.0 (0.32)
Catheterisation time (days)	3.25 (0.55)
Hospital stay (days)	3.25 (0.55)

Table 2 Univariate analysis comparing variables before, and at 1 month and 1 year after TURP, using the Wilcoxon test.

Time	IPSS	PVR (mL)	Qmax (mL/s)
Before	27.0 (3.78)	6.2 (2.07)	195.7 (119.2)
1 month	8.2 (1.6)	41.5 (23.0)	18 (1.6)
P	<0.001	<0.001	<0.001
1 year	6.3 (1.4)	31 (18)	19 (1.9)
P	<0.001	<0.001	<0.001

Table 3 A comparison of the results before and after TURP in the present study and other similar studies.

Variable	Present	[13]	[14]	[15]	[16]
No. of patients	40	4	35	17	86
Preoperative
Prostate size (g)	124.4 (34.5)	207.4	82.4 (18.0)	117.9 (18.6)	115.2
IPSS	27.0 (3.78)	31	–	22.5 (5.9)	21.8
Qmax (mL/s)	6.20 (2.07)	–	4.37 (1.18)	5.6 (4.9)	7.1
PVR (mL)	195.7 (119.2)	505	–	–	161.2
Postoperative
IPSS	8.2 (1.6)	2.75	6.5	8.9 (4.9)	11.6
Qmax (mL/s)	18.1 (1.64)	–	19.9 (3.9)	15.9 (4.7)	15.1