Duplexsonographische Untersuchungen zur retinalen Durchblutung nach Inhalation verschiedener Atemgasgemische
Beteiligte Einrichtungen
Abstract
BACKGROUND: Hyperoxic-hypercapnic inhalation is a therapeutic option in vascular disorders of the retina. The effect of hyperoxic and/or hypercapnic inhalation on the perfusion of the retina was examined.
METHODS: Twenty-five young adults between 18 and 35 years were investigated in a prospective study. They inhaled one of three different mixtures of breathing gases: (1) 100% O2, (2) Carbogen 240 (95% O2 and 5% CO2), (3) 92% O2 with 8% CO2 and were examined by color Doppler imaging of the CRA and OA before and after inhalation. The resistance index (RI) was calculated.
RESULTS: The majority of the subjects showed an Increase in the RI in both ophthalmic vessels after inhalation of pure O2, a decrease after breathing in 92% O2 and 8% CO2 and it remained almost constant with inhalation of 95% O2 and 5% CO2.
CONCLUSIONS: Inhalation of 92% O2 and 8% CO2 is a possibility for decreasing the peripheral resistance of OA and CRA. No change in blood flow was observed with Carbogen 240.
Bibliografische Daten
Titel in Übersetzung | Duplex ultrasound examinations of retinal circulation after inhalation of various mixed respiratory gases |
---|---|
Originalsprache | Deutsch |
ISSN | 0941-293X |
DOIs | |
Status | Veröffentlicht - 04.1998 |
PubMed | 9623258 |
---|