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  • Title: A comparison of the effect of 1.5% glycine and 5% glucose irrigants on plasma serum physiology and the incidence of transurethral resection syndrome during prostate resection.
    Author: Collins JW, Macdermott S, Bradbrook RA, Keeley FX, Timoney AG.
    Journal: BJU Int; 2005 Aug; 96(3):368-72. PubMed ID: 16042732.
    Abstract:
    OBJECTIVE: To examine changes in the pathophysiology and frequency of the transurethral resection (TUR) syndrome with two irrigation fluids, as variable amounts of irrigation fluid are absorbed during TUR of the prostate (TURP), and although polar solutes are required to prevent an effect on diathermy, the solutes may have effects when absorbed. PATIENTS AND METHODS: Between December 2001 and March 2003, 250 patients were included in a prospective randomized trial comparing glycine 1.5% with 5% glucose irrigation fluids. We measured blood loss, fluid absorption, temperature change, biochemistry including a glycine assay, and peri-operative symptoms. Blood samples were taken immediately before and immediately, 5 and 24 h after TURP. Irrigating fluid absorption during TURP was measured with 1% ethanol as a marker and breath ethanol measurements. Operative details were recorded, including the type of anaesthesia (with or with no sedation), resection time and weight of resected tissue. Peri-operative symptoms were documented prospectively. TUR syndrome was defined as a serum sodium level of < or = 125 mmol/L with two or more associated symptoms or signs of TUR syndrome. RESULTS: Five (2%) patients had TUR syndrome; all five were irrigated with glycine, although this difference was not statistically significant (P = 0.06). Of the five men, three had hypotension, four were tired, one was nauseous, two had parasthesia, two had 'uneasiness', one had blurred vision and two were confused; none had chest pain. There was a large variation between the groups in the level of glycine assayed immediately after TURP; a high glycine level was associated with the TUR syndrome (P = 0.01). There was no difference between the groups in levels of sodium, potassium, urea, creatinine, osmolality, calcium, haematocrit, albumin serum levels or peri-operative blood loss (defined as a change from before to after TURP in haemoglobin level, accounting for transfusions). CONCLUSIONS: An increase in serum glycine was associated with TUR syndrome; there were large variations in the amounts of glycine absorbed, reaching levels many times the upper limit of normal. In other studies, glycine was reportedly toxic, and that the levels recorded were many times the upper limit of normal may have both immediate and long-term effects.
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