Discussion
BTV, throat
PNEUMOPERITONEUM
In this study, both VCV and PCV-VG ventilation modes inhibited BTV in patients during laparoscopic surgery for gynecological oncology, and the degree of inhibition increased with increasing pneumoperitoneum time. The degree of BTV inhibition was not significantly different between the two groups at 1 h after pneumoperitoneum. However, the degree of BTV inhibition was significantly less in the PCV-VG group than in VCV group at 2 h after pneumoperitoneum. In addition, VT was similar for both modes indicating that PCV-VG could deliver a preset ventilation volume to the patients. To the best of our knowledge, this is the first study to evaluate the effect of PCV-VG mode on BTV in patients during laparoscopic surgery.Similarly, an animal study of Piccin VS comparing the effects of four mechanical ventilation strategies (normal volume ventilation, low volume ventilation, high volume ventilation, and high-pressure ventilation) on the mucociliary system [Jung Min Lee et al. [Although mechanical ventilation is widely used in intubated patients with various medical and surgical conditions, its direct effect on BTV in patients undergoing anesthesia is unknown. In this study, fiberscope was used to locate, map, and measure BTV. This method compares with the radioactive aerosol inhalation lung scanning method, nasal saccharin transport time test, and other methods for determining and evaluating BTV. Besides, it is a relatively accurate and non-invasive measurement method [However, this study has some limitations. First, the movement trajectory of methylene blue dye on the airway surface of most patients under general anesthesia was not an absolute straight line but showed an irregular curve. This indicates that although the total swing direction of the airway surface cilia is toward the direction of throat, each swing does not always go in a straight line [