FEV6Forced Expiratory Volume in 6
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Percentage of predicted value of FEV6 (FEV6%) and FEV1/FEV6 also had an increasing trend with the increase of distance, but the regression analysis showed no statistical significance [Figure 1]b and [Figure 1]c.
We used FEV6, which has been demonstrated to be an alternative parameter of forced vital capacity (FVC),[sup][16] combined with FEV1, to evaluate airflow obstruction.
This study is designed to compare open cholecystectomy with laparoscopic cholecystectomy using latest variables of pulmonary functions like FEV6 and FEV1/FEV6 as parameters.
As there was no study found in the literature which compared FEV6, therefore to calculate the sample size, another study comparing FEV1/FVC (Forced Vital Capacity) was selected12.
It electronically measures PEF, FEV1, FEV6 and FEV1/FEV6 ratio and its results are accurate and comparable with standard spirometry 10 .
Quantitative data which includes age, FEV1, FEV6, FEV1/FEV6 ratio and BMI is presented as Mean SD.
After operation a significant reduction in the FEV1, FEV6 and FEV1/FEV6 occurred after both open and laparoscopic cholecystectomy.