Retrobulbar ocular blood flow changes after orbital decompression in XXXX measured by color Doppler imaging.

@entity6875 @entity1 @entity432
PURPOSE: To evaluate if decompression surgery produces changes in retrobulbar blood flow parameters in @entity6875 ( @entity6875 ). METHODS: Retrobulbar blood vessels of 26 eyes (14 @entity1 ) that underwent orbital bone decompression between June 2009 and May 2010 were measured prospectively using color Doppler ultrasound before and after surgery. The disease was inactive in all @entity1 enrolled according to the European Group on Graves' Orbitopathy. @entity1 were classified with mild, moderate-to-severe, or sight-threatening disease. All @entity1 underwent a full ophthalmic examination including intraocular pressure and Hertel measurement. An age-matched control group included 20 eyes of 20 healthy volunteers. RESULTS: The resistance indexes (RIs) in the central retinal artery (CRA) and @entity432 ( @entity432 ) were significantly higher in @entity1 with @entity6875 preoperatively than in the control group (P < 0.001, P = 0.001 respectively). After decompression surgery, a significant decrease in RIs occurred in the CRA (5%) and @entity432 (6%) (P = 0.002, P < 0.001 respectively). Proptosis was decreased a median of 6 mm (range, 4-7). Three-wall decompression surgery resulted in a significantly greater reduction in exophthalmos (median 7 mm) compared with two-wall surgery (median 5 mm) and one-wall surgery (2.5 mm). Although no significant correlation was found, the RIs decreased more with major reductions in exophthalmos. CONCLUSIONS: In inactive moderate-to-severe @entity6875 , the RIs of the CRA and @entity432 are higher than in normal subjects. The authors hypothesized that increased RIs of inactive @entity6875 may be due to orbital extrinsic compression of vascular structures because decompression surgery leads to decreases in the RIs of both the CRA and @entity432 .
