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  • Title: [Distribution of irrigating fluid to intracellular and extracellular fluid space during transurethral prostatectomy I--Estimation of irrigating fluid absorbed by measuring serum osmolality].
    Author: Miyao H, Tanaka K, Kotake Y, Kawazoe T, Fujioka T.
    Journal: Masui; 1996 Jun; 45(6):681-8. PubMed ID: 8752769.
    Abstract:
    Twenty-three patients undergoing transurethral resection of the prostate (TURP) under spinal anesthesia were studied. The irrigating fluid widely used in Japan is a hypo-osmolar solution with 3% sorbitol (Uromatic S, 170 mOsm.kgH2O-1, Baxter). The blood loss and the distribution of the irrigating fluid absorbed were computed from serum osmolality, blood urea nitrogen, and hematocrit using the equation we had formulated. The blood loss, the total fluid absorbed (ABS), and the volumes distributed to intracellular space (delta ICF) and extracellular space (delta ECF) were 419 +/- 677 ml, 1,582 +/- 1,446 ml, 384 +/- 348 ml and 778 +/- 1,279 ml (mean+/-SD), respectively. The correlation coefficient of delta OSM (difference between pre- and post-surgical serum osmolality) vs ABS and that of delta OSM vs delta ICF were high (0.98, 0.98) but that of delta Na (difference between pre- and postsurgical serum sodium) vs ABS was low (0.56). The linear regression equations of ABS vs delta OSM and delta ICF vs delta OSM were ABS (L) = 0.362 x delta OSM and delta ICF (L) = 0.088 x delta OSM, respectively. These equations means that one mOsm.kgH2O-1 reduction of the serum osmolality is the result of 362 ml of irrigating fluid absorbed, 88 ml of which shifting into the intracellular space.
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