RESUMEN
The choice of antimicrobial agents for treatment of prostatitis should be based on two factors: in vitro sensitivity of isolated pathogens and potential intraprostatic penetration of the molecule. Unfortunately, only a few antibiotic agents penetrate prostatic fluid which is the primary site of infection. Lomefloxacin, a once-daily difluoroquinolone, could play a central role in the therapy of prostatitis because it has sufficient liposolubility, low ionization (pKa), low protein binding, small molecular size, long serum elimination half-life and it can pass from interstital fluid across prostatic cells into the lumen. This study was carried out on 12 patients (mean age 65 years) with normal hepatic and renal function, divided into two groups of 6 subjects each. Lomefloxacin was administered for perioperative antisepsis at the dose of 400 mg orally once a day for 4 days. Serum and tissue were sampled in the two groups of patients 4 h (Group A) and 8 h (Group B) respectively after the last drug administration. Tissue penetration was higher than serum, with a T/S >2 in the prostatic capsule and seminal blister, and a T/S >1.6 in the adenomatous tissue, in both groups of patients. In addition, the prostatic tissue concentrations exceeded the MIC for the main pathogens usually involved in urogenital infections. Therefore, because of its pharmacokineitic and pharmacodynamic characteristics, lomefloxacin is proposed as an efficacious therapeutic option, even for the treatment of chronic prostatitis.
Asunto(s)
Antiinfecciosos/farmacocinética , Antiinfecciosos/uso terapéutico , Fluoroquinolonas , Próstata/metabolismo , Prostatitis/metabolismo , Quinolonas/farmacocinética , Anciano , Antiinfecciosos/administración & dosificación , Antiinfecciosos/sangre , Humanos , Masculino , Persona de Mediana Edad , Próstata/efectos de los fármacos , Prostatitis/sangre , Prostatitis/tratamiento farmacológico , Quinolonas/administración & dosificación , Quinolonas/sangre , Vesículas Seminales/metabolismoRESUMEN
The morphology of the mucosa of orthotopic ileal bladders in place for 3 months to 4 years was studied in biopsies obtained at random from 12 patients. A mucosal flattening, a reorganization of the lining epithelium and a disappearance of the fenestrated areas of blood capillaries were found. Enterocytes progressively stratified and acquired poorly differentiated features, along with loss of microvilli, reduction of the apical fuzzy glycocalyx and enlargement of intercellular spaces. Goblet cells at short-term evaluation were actively involved in mucous synthesis and secretion. Metabolic acidosis was slight both in short-term postoperative periods-under alkaline therapy- and in long-term postoperative periods-when therapy was suspended. It can be concluded that, firstly, urine contact determines in such reservoirs a condition of acute irritation and, secondly, environmental changes induce the ileal mucosa to develop a new phenotype probably better suited to a protective rather than absorptive function.
Asunto(s)
Íleon/trasplante , Íleon/ultraestructura , Mucosa Intestinal/trasplante , Mucosa Intestinal/ultraestructura , Trasplante Heterotópico/patología , Vejiga Urinaria/trasplante , Vejiga Urinaria/ultraestructura , Anciano , Humanos , Íleon/patología , Mucosa Intestinal/patología , Masculino , Persona de Mediana Edad , Periodo Posoperatorio , Cirugía Plástica , Vejiga Urinaria/patologíaRESUMEN
Since January 1985, orthotopic ileal bladder substitution after radical cystectomy was performed in 64 male patients. The Camey I procedure was performed in 35 patients (group 1) and the Studer procedure in 29 (group 2). Clinical, metabolic and urodynamic evaluation was performed at regular intervals with a mean follow-up of 27 months for group 1 and 13.6 months for group 2. Patients with a Camey I bladder reconstruction presented smaller capacity and higher intraluminal pressure resulting in shorter voiding intervals and a practically uniform presence of enuresis, as opposed to those reconstructed with the Studer procedure. The incidence of ureteral reflux was also higher in group 1. Metabolic studies in both groups revealed a slight metabolic acidosis which was treated with oral alkalinization. It is concluded that detubularization of the terminal ileum creates a more favorable low-pressure reservoir.