Are There Acid Base Changes During Transurethral Resection of the Prostrate (TURP)?
STEFAN SCHEINGRABER, LARS HEITMANN, WERNER WEBER AND UDILO FINSTERER Clinic of Anesthesiology, Ludwig Maxmilians University, Klinikum Grosshadern, Munich, Germany Anesth. Analg., 90: 946-950, 2000 Acid base status during transurethral resection of the prostate (TURP) has been virtually neglected. In this study, the acid base status was measured and interpreted according to the Stewart approach, which focuses more on the influence of serum electrolyte concentrations on acid base changes than does the conventional Henderson-Hasselbalch approach. The following variables were ascertained in 20 patients undergoing TURP: PaO2, Paco2, pHa, actual bicarbonate, standard base excess, serum concentration of sodium, potassium, chloride, lactate, and total protein. A study group (n = 11) and a control group (n = 9) were constructed, depending on the maximal amount of fluid absorption estimated using ethanol concentration monitoring in the expired gas. Those in the study group developed a mild acido
