Open AccessBronchospirometry and Separate Measurement of Occlusion Pressure Before and After Lung Resection Using a Double-Lumen Endotracheal Tube
Author(s) -
Kunio Sugimori,
Tetsuo Kôchi,
Takashi Nishino,
Kenji Hiraga,
Tadanobu Mizuguchi
Publication year - 1993
Publication title -
anesthesia and analgesia/anesthesia and analgesia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.404
H-Index - 201
eISSN - 1526-7598
pISSN - 0003-2999
DOI - 10.1213/00000539-199304000-00027
Subject(s) - medicine , enflurane , tidal volume , anesthesia , ventilation (architecture) , airway , endotracheal tube , lung , lung volumes , respiratory system , intubation , halothane , mechanical engineering , engineering
To assess the distribution of ventilation to each lung, we measured ventilation and maximum negative airway pressure during occluded inspiratory effort (Pmax) of the individual lungs in eight male patients immediately before and after right upper lobectomy using a double-lumen endotracheal tube at a constant depth of enflurane anesthesia (end-tidal concentration 1.7%). Compared with the breathing pattern observed immediately before surgery, minute ventilation, Pmax, and respiratory frequency significantly increased immediately after the surgery, whereas tidal volume was unchanged. Bronchospirometry revealed that tidal volumes on the nonoperated side significantly increased after the operation. In contrast, tidal volumes on the operated side significantly decreased after the operation and were associated with significantly smaller Pmax obtained from unilateral airway than those of the nonoperated side postoperatively. These results indicate that there are considerable differences in ventilatory function between the lungs on the operated side and nonoperated side. The lung on the nonoperated side can partially compensate for the impaired ventilatory function on the operated side.