An intravesicoprostatic hydrostatic pressure less than 10 mm. Hg maintains normal anatomy and physiology of the muscular and vascular prostatic structures. An increase in hydrostatic intravesicoprostatic pressure to more than 10mm. Hg produces a distortion in the musculature of the prostate, especially at the true capsule, opening the cut vessels and making possible the absorption of the irrigant free of electrolytes (transurethral resection syndrome). A low hydrostatic intravesicoprostatic pressure permits the compression of cut vessels by the inflow hydraulic pressure of 90 cm. water, achieving hydraulic hemostasis during transurethral resection of the prostate. Less electrocoagulation is necessary, resulting in more rapid patient recovery.
Serratia marcescens, long considered a non-pathogen, is now found to be responsible for outbreaks of nosocomial infections. An outbreak of Serratia infection at 2 institutions is reported, in which 253 cultures of Serratia were grown and 115 patients were involved. The 3 most important conditions that preceded isolation of Serratia were the use of indwelling urethral catheters, antibiotic therapy and operation. All infections were acquired in the hospital. An epidemiological survey showed that the organism is present in the environment, even in the absence of active infection.
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