It is necessary to measure the chest wall thickness (CWT) and determine the appropriate catheter length taking the differences of habitus in race and region into consideration.
Also timing the end of expiration to measure the chest circumference was challenging.
The teaching sessions were videotaped and resuscitation quality was scored using a checklist while we measured the chest compression parameters with a manikin.
We previously found that optoelectronic plethysmography can be used to measure the chest wall volume and its compartments: rib cage and abdomen [ 1].
This application measures the chest compression rate and gives audiovisual feedback, improving the performance of chest compression by helping the user to achieve the correct chest compression rate [ 71].
We did not measure the chest-wall mechanics or the recruitable lung, so we could not address this possibility as a cause of low PF ratio.
Chest girth was assessed at full expiration, measuring the upper chest on the level of junction between the deltopectoral groove and tip of anterior axillary fold.
The size of the pneumothorax (i.e. the volume of air in the pleural space) can be determined with a reasonable degree of accuracy by measuring the distance between the chest wall and the lung.
Conclusion: Both PPL measured into the chest tube, PES measured by the Gaeltec probe or by the feeding tube are reproducible methods.
EVLW measured by the chest radiograph only modestly predicted EVLWI as measured by the transpulmonary thermodilution technique.
