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Abstract Few studies have discussed the disease nature and treatment outcomes for bilateral cavernous sinus dural arteriovenous fistula (CSDAVF). This study aimed to investigate the clinical features and treatment outcomes of bilateral CSDAVF. Embase, Medline, and Cochrane library were searched for studies that specified the outcomes of bilateral CSDAVF from inception to April 2022. The classification, clinical presentation, angiographic feature, surgical approach, and treatment outcomes were collected. Meta-analysis was performed using the random effects model. Eight studies reporting 97 patients were included. The clinical presentation was mainly orbital (n = 80), cavernous (n = 52) and cerebral (n = 5) symptoms. The most approached surgical route was inferior petrosal sinus (n = 80), followed by superior orbital vein (n = 10), and alternative approach (n = 7). Clinical symptoms of 88% of the patients (95% CI 80–93%, I2 = 0%) were cured, and 82% (95% CI 70–90%, I2 = 7%) had angiographic complete obliteration of fistulas during follow up. The overall complication rate was 18% (95% CI 11–27%, I2 = 0%). Therefore, endovascular treatment is an effective treatment for bilateral CSDAVF regarding clinical or angiographic outcomes. However, detailed evaluation of preoperative images and comprehensive surgical planning of the approach route are mandatory owing to complexity of the lesions.

According to the problem that a large number of residual coal left in the goaf of the resources integration mine because of the early extensive mining, which was easy to cause spontaneous combustion of coal. Taking No. 4+9 coal seam of Beizu Coal Mine as a study subject, the combustion situation of fire area was researched through indicator gas experiment, and the high-temperature area of the roadway roof face was divided through infrared detection technique. The result showed that, CO C2H4 and C2H6 could be taken as the indicator gas for spontaneous combustion in No. 4+9 coal seam of Beizu Coal Mine, the temperature in fire area was 80~110 ⋅C, and there was a tendency that the fire area enlarged from north to south. The research result provided reference for drilling detection and plugging and so on. [ABSTRACT FROM AUTHOR]