To measure the distance between the upper edge of the thyroid cartilage to the upper edge of the sternum add the distance from the upper edge of the sternum to the carina was calculated according to the chest CT scans as a guide to the placement of Uniblocker without the aid of FOB.
In previous study, the investigators found Chest computed tomography (CT) image can accurately predicting the optimal insertion depth of Uniblocker,however in some hospital the CT scan performed for the preoperative surgical evaluation without the vocal cords slices. If a more extensive CT scan was needed for obtaining a more reliable image of the vocal cords,the additional exposure dose would be a major disadvantage of the method.So the investigators measure the distance between the upper edge of the thyroid cartilage to the upper edge of the sternum add the distance from the upper edge of the sternum to the carina calculated according to the chest CT scans as a guide to the placement of Uniblocker without the aid of FOB.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
OTHER
Masking
TRIPLE
Enrollment
90
To measure the distance between the upper edge of the thyroid cartilage to the upper edge of the sternum add the distance from the upper edge of the sternum to the carina calculated according to the chest CT scans as a guide to the placement of Uniblocker without the aid of Fiberoptic bronchoscope.
Calculate the depth of intubation according to the formula of 0.1977\* patient's height - 4.2423
The intubation of Uniblocker under the guidance of Fiberoptic bronchoscope
The first hospital of Qinhuangdao
Qinhuangdao, Hebei, China
RECRUITINGThe intubation time
The intubation time defined as the time from the anesthesiologist inserted the video laryngoscope between the teeth of patients until Uniblocker at the optimal position and this was done using a stopwatch.
Time frame: 1 year
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