RESUMEN
A rinomanometria anterior ativa foi considerado o método de escolha para avaliaçäo da permeabilidade nasal em crianças e adolescentes que apresentavam obstruçäo nasal e foram submetidos a algum tipo de cirurgia para sua correçäo. Desta maneira, pode ser realizado, uma comparaçäo objetiva entre os resultados pré e pós-operatórios
Asunto(s)
Niño , Adolescente , Humanos , Masculino , Femenino , Manometría/instrumentación , Cavidad Nasal , Ventilación Pulmonar/fisiología , Obstrucción Nasal/cirugía , Oximetazolina/farmacología , Periodo Posoperatorio , Respiración/fisiologíaRESUMEN
Prolonged exposure to noradrenaline (NA) brings about an increase in the release of prostaglandin (PG)-like material from rat aortic strip. The release is greater with oxymetazoline while methoxamine decreases it. These effects are blocked by yohimbine and prazosin respectively. Pretreatment with 6-OHDA or reserpine diminishes the release of PG-like material. Barium chloride, a non-specific spasmogen, does not affect the release significantly. It appears therefore that the source of PG-like material is presynaptic and that its release mechanism is linked to an alpha 2 (alpha 2) adrenoceptor. It is proposed that this release of PG-like material contributes to the development of desensitisation in vascular tissue.