ABSTRACT
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.
Subject(s)
Glaucoma/diagnostic imaging , Ophthalmic Artery , Optic Nerve/blood supply , Retinal Artery , Ultrasonography, Doppler, Color/standards , Adult , Blood Flow Velocity , Case-Control Studies , Glaucoma/physiopathology , Glaucoma/therapy , Humans , Middle Aged , Prognosis , Risk Factors , Systole , Vascular Resistance , Visual FieldsABSTRACT
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.
Subject(s)
Altitude Sickness/complications , Hypoxia/complications , Retinal Hemorrhage/etiology , Acute Disease , Adaptation, Physiological , Adult , Altitude Sickness/physiopathology , Female , Humans , Male , Middle Aged , Partial Pressure , Retina/physiopathology , Retinal Hemorrhage/physiopathologyABSTRACT
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.
