Canadian journal of ophthalmology. Journal canadien d'ophtalmologie · 2014
Effects of sub-Tenon's anaesthesia on ocular hemodynamics.
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Coşkun Mesut, Dağlioğlu Mutlu Cihan, Davran Ramazan, Ilhan Nilüfer, Ilhan Ozgür, Ayhan Tuzcu Esra, Ayintap Emre, Keskin Uğurcan, Oksüz Huseyin
Аннотация
OBJECTIVE: To research the effects of sub-Tenon's anaesthesia (STA) on ocular hemodynamics in patients with cataract using colour Doppler imaging (CDI).
DESIGN: Prospective clinical study.
PARTICIPANTS: Thirty-four eyes of 34 patients with age-related cataract.
METHODS: Peak systolic velocity (PSV), end-diastolic velocity (EDV), and resistive index (RI) values of the ophthalmic artery (OA), central retinal artery, and central retinal vein were measured by CDI before and immediately after performing sub-Tenon block using 2 mL of 2% lidocaine with adrenaline (1:200 000).
RESULTS: Both PSV and EDV values were significantly decreased after sub-Tenon injection in all the studied vessels of the patients. However, no important changes were observed in the RI values of the vessels.
CONCLUSIONS: STA markedly reduced ocular blood flow. The reduction may be more acceptable compared with other retrobulbar block methods. Sub-Tenon block should be performed carefully to senile patients with cataract with vascular occlusive disorder.
DESIGN: Prospective clinical study.
PARTICIPANTS: Thirty-four eyes of 34 patients with age-related cataract.
METHODS: Peak systolic velocity (PSV), end-diastolic velocity (EDV), and resistive index (RI) values of the ophthalmic artery (OA), central retinal artery, and central retinal vein were measured by CDI before and immediately after performing sub-Tenon block using 2 mL of 2% lidocaine with adrenaline (1:200 000).
RESULTS: Both PSV and EDV values were significantly decreased after sub-Tenon injection in all the studied vessels of the patients. However, no important changes were observed in the RI values of the vessels.
CONCLUSIONS: STA markedly reduced ocular blood flow. The reduction may be more acceptable compared with other retrobulbar block methods. Sub-Tenon block should be performed carefully to senile patients with cataract with vascular occlusive disorder.