Xiaoling Huang1, Jiao Zhang2, Hong Yang1, Tinghe Yu3. 1. Department of Ultrasonography, The First Affiliated Hospital, Chongqing Medical University, Chongqing, 400016, China. 2. Institute of Ultrasound Engineering in Medicine, Chongqing Medical University, Chongqing, 400016, China. 3. Institute of Life Science, Chongqing Medical University, Chongqing, 400016, China. yutinghe@hotmail.com.
Abstract
PURPOSE: Operations for large acoustic neuromas were difficult. The aim of this pilot study was to determine whether intraoperative ultrasonography (IOUS) was a useful adjunct to the microsurgery. METHODS: Fifteen patients with large acoustic neuromas underwent surgical interventions. IOUS was applied in seven cases, and the other eight cases served as controls. IOUS was performed to monitor the surgery, and the intraoperative data were compared with postoperative CT/MRI scans. RESULTS: All tumors could be identified in ultrasonic images. Lesions appeared as solid (2/7) or mixed patterns (5/7) with clear boundaries. A larger tumor volume was seen in the IOUS group but without statistical significance (29.05 ± 15.47 vs. 21.82 ± 14.78 cm(3), P = 0.3718). The use of IOUS did not prolong the operation time (404.29 ± 111.18 vs. 420.00 ± 114.24 min, P = 0.7921) and did not increase the rate of intracranial infections (28.57 vs. 25.00%, P = 1.000). The residual tumor detected with IOUS immediately after the operation was consistent with the data from postoperative CT/MRI scans in all cases. CONCLUSION: IOUS can be used to monitor surgery in real time as a technique to assist microsurgical procedures for large acoustic neuromas with trouble.
PURPOSE: Operations for large acoustic neuromas were difficult. The aim of this pilot study was to determine whether intraoperative ultrasonography (IOUS) was a useful adjunct to the microsurgery. METHODS: Fifteen patients with large acoustic neuromas underwent surgical interventions. IOUS was applied in seven cases, and the other eight cases served as controls. IOUS was performed to monitor the surgery, and the intraoperative data were compared with postoperative CT/MRI scans. RESULTS: All tumors could be identified in ultrasonic images. Lesions appeared as solid (2/7) or mixed patterns (5/7) with clear boundaries. A larger tumor volume was seen in the IOUS group but without statistical significance (29.05 ± 15.47 vs. 21.82 ± 14.78 cm(3), P = 0.3718). The use of IOUS did not prolong the operation time (404.29 ± 111.18 vs. 420.00 ± 114.24 min, P = 0.7921) and did not increase the rate of intracranial infections (28.57 vs. 25.00%, P = 1.000). The residual tumor detected with IOUS immediately after the operation was consistent with the data from postoperative CT/MRI scans in all cases. CONCLUSION: IOUS can be used to monitor surgery in real time as a technique to assist microsurgical procedures for large acoustic neuromas with trouble.
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