RESUMO
METHODS: We performed Echo color Doppler examinations on 100 glaucomatous patients (197 eyes). Ophthalmic artery and central retinal artery were particularly considered. The study included eyes in every level and type of glaucoma, and in various types of treatment (topical therapy, Argon laser trabeculoplasty, Argon/YAG/surgical iridectomy, trabeculectomy). The parameters we considered were: ocular tension, anterior chamber angle, optic disc excavation, visual field, refraction and vascular risk factors. We measured the flow values of the ophthalmic artery and of the central retinal artery, i.e. maximal systolic velocity, diastolic velocity and vascular resistance index. RESULTS: We observed that if we divide the value of ocular tension by the systolic velocity and multiply the result by the resistance index, we obtain a number which may be considered as a prognostic factor of evolutive risk. We compared our cases with a population free from glaucomatous and cardiovascular problems.
Assuntos
Glaucoma/diagnóstico por imagem , Artéria Oftálmica , Nervo Óptico/irrigação sanguínea , Artéria Retiniana , Ultrassonografia Doppler em Cores/normas , Adulto , Velocidade do Fluxo Sanguíneo , Estudos de Casos e Controles , Glaucoma/fisiopatologia , Glaucoma/terapia , Humanos , Pessoa de Meia-Idade , Prognóstico , Fatores de Risco , Sístole , Resistência Vascular , Campos VisuaisRESUMO
The authors discuss modern views on altitude acclimatization and acute mountain sickness (A.M.S.). They particularly consider recent observations of high altitude retinal hemorrhages (H.A.R.H.). They report some subjects they personally examined and suggest the probable factors involved in the pathogenesis of the disorder.
Assuntos
Doença da Altitude/complicações , Hipóxia/complicações , Hemorragia Retiniana/etiologia , Doença Aguda , Adaptação Fisiológica , Adulto , Doença da Altitude/fisiopatologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Pressão Parcial , Retina/fisiopatologia , Hemorragia Retiniana/fisiopatologiaRESUMO
Perfusion althesin, pentazocin and an association of halothane was used in more than 500 eye operations. A number of parameters (left humerus arterial pressure, heart rate, CVP, IOT) were measured and assesed statistically in 21 selected patients and a pathogenetic interpretation of observed bulbar hypotonia attempted. The important bulbar hypotonizing action brought on by this anaesthetic procedure, and the favourable course of surgery with the technique are confirmed.
