Abstract
Overlooked bullae have been reported to contribute to the higher incidence of recurrence of pneumothorax following video-assisted thoracic surgery (VATS). In this study, we investigated whether high frequency jet ventilation (HFJV) + positive end-expiratory pressure (PEEP) prevented overlooking of bullae by blowing up the bullae and inflating the lungs moderately during VATS for spontaneous pneumothorax patients. A total of 31 patients with spontaneous pneumothorax who underwent VATS were enrolled in this study. We examined the number, size, and location of bullae with and without HFJV+PEEP during VATS. More bullae were found with HFJV + PEEP than without HFJV + PEEP in 15 of the 31 patients. Significantly more bullae smaller than 2 cm in diameter were detected with HFJV + PEEP than without HFJV + PEEP. In the patients with 1 - 3 bullae, the detection rate was significantly higher with HFJV + PEEP than without HFJV + PEEP. All bullae confirmed with VATS were detected only in one case (3.2 %) on preoperative chest X-ray, and in two cases (6.5 %) on chest CT. The recurrence rate of pneumothorax following VATS with HFJV + PEEP was 3.3 % (1/31). Our results suggested that VATS combined with HFJV and PEEP might prevent the overlooking of bullae and reduce the postoperative recurrence of spontaneous pneumothorax.
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