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Visual Field Preservation in Surgery of Occipital Arteriovenous Malformations: A Prospective Study
First author：Xianzeng Tong
Corresponding author：Jizong Zhao
essential_information
- Person in charge：Xianzeng Tong
- Data Sources： OTHERS
- Number of papers：OTHERS20190889
- Published time：2015-07-03
2015-07-03
Published articles
Journal：World Neurosurgery
Publication type: Clinical Article
IF(IF): 2.104
PMID: Full text Download
Background And Purpose
Method
Forty-six consecutive patients with occipital AVMs were randomized in our study. DTI of the optic radiation was displayed during neuronavigation surgery in 24 patients. The other 22 patients were treated surgically without neuronavigation. Modified Rankin Scale (mRS) scores and visual fields were evaluated preoperatively, immediately after surgery, and at the last follow-up.
Conclusion
A history of hemorrhage is an independent risk factor for VFDs associated with occipital AVMs. Although not showing superiority in postoperative mRS, functional MRI navigation-guided surgery may help to radically resect occipital AVMs and preserve patient visual fields. A 5-mm distance from the optic radiation may be a suitable safety margin for visual field preservation.
Main results
The patients' baseline characteristics and AVM features were statistically similar between the 2 surgical groups. The postoperative obliteration rate was 100%. The postoperative mRS scores did not differ between the 2 groups (P > 0.05). Preexisting VFDs were more common (P = 0.00004) in patients who bled than in those with unruptured AVMs. The application of DTI-incorporated neuronavigation reduced the frequency and severity of postoperative VFDs (P = 0.013 and 0.001, respectively). Visual fields were more likely to be preserved in patients with an AVM >5 mm from the optic radiation (P = 0.025).