The purpose of this study is to determine whether the double-lumen endotracheal tube or the standard single-lumen tracheal tube, with an Arndt® blocker, is superior in providing one lung ventilation during thoracic surgery.
The purpose of the study is to compare a double lumen tube versus the standard single-lumen tracheal tube, with an Arndt® blocker, in the morbidly obese patient who requires one-lung ventilation during surgery. The objects is to determine which device is best for intubation and is most effective in terms of optimal positioning of the device, of lung collapse, and quality of lung isolation.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
50
University of Iowa
Iowa City, Iowa, United States
Time Taken for Endotracheal Tube Placement Procedure.
For each group, the time in minutes required for the anesthesiologist to successfully place the endotracheal tube. Intubation time was recorded as the time from when the tracheal tube passed the vocal cords until the anesthetist concluded that the DLT (Arm 1) or the single-lumen tube with the Arndt blocker (Arm 2) was correctly placed and optimal position was confirmed with the fiberoptic bronchoscope.
Time frame: This measurement occurred after the patient was in the operating room and the randomization group was determined. This measurement began and ended during the intubation procedure.
Number of Participants in Which the Tube Was Successfully Positioned at First Attempt
Number of participants in each group in which the tube was successfully positioned at first attempt
Time frame: This data measure was occurred during surgery.
Effectiveness of Lung Collapse
For each group, the number of participants in which lung collapse was evaluated as: (i) good-complete collapse without surgical interference, (ii) fair-total collapse, but with residual air, and (iii) poor-no or partial collapse, lung inflated and interfering with the surgical exposure.
Time frame: This measure occured during surgery just after intubation.
Time Required to Collapse the Lung
For each group, the mean time for lung isolation/collapse was measured from the institution of one-lung ventilation to the time of total lung collapse.
Time frame: This measurement occurred during surgery.
Number of Participants With Successful Reinflation
In each group, the number of Participants in which successful lung reinflation occurred.
Time frame: This occurred during surgery.
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Mean Intraoperative Oxygenation During One-lung Ventilation
For each group, the mean intraoperative oxygenation (arterial partial pressure of oxygen measured by arterial blood gases) were taken during two-lung ventilation (baseline) and after 30 min of one-lung ventilation.
Time frame: This measure occured during surgery.