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Fig. 1 | BMC Anesthesiology

Fig. 1

From: Pressure-controlled ventilation-volume guaranteed mode improves bronchial mucus transport velocity in patients during laparoscopic surgery for gynecological oncology: a randomized controlled study

Fig. 1

Method for measuring bronchial mucus transport velocity (BTV). a An epidural catheter is inserted through a biopsy hole. b The catheter extends from the distal end of the biopsy hole. c Epidural catheter reaches the junction of the left upper bronchial opening and left lower bronchial opening. d Inject methylene blue dye. e Mark the zero point. f Methylene blue motion trajectory. g The catheter moves to the near edge of the dye's trajectory. h Mark the mark point. i Measure the distance between the mark point and the zero position

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BMC Anesthesiology

ISSN: 1471-2253

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