The findings of this study show that there was reasonable agreement between physiological dead space calculated using CO 2SMO plus and its software programme Analysis Plus! and the DB method. Information regarding dead space ventilation is important because it can be used for both disease progression and prognostication. After correction for compressed gas, agreement between the two measured tidal volumes improved, particularly in those patients ventilated with 400–650 ml breaths.Ĭalculating dead space using a DB is impractical in busy intensive care units. There was poor agreement between expired tidal volume measured by the ventilator and the CO 2SMO monitor. The calculated value of \( P_ \) measured by VCAP and corrected and uncorrected values measured in expired collected gas. Single-breath CO 2 waveform areas under the curve were computed automatically by software to calculate physiological dead space. In total, 168 paired readings were taken. Dead space was calculated simultaneously using VCAP (CO 2SMO) and the Bohr–Enghoff equation. Prospective observational study of 48 mechanically ventilated adults ICU patients. Few studies have been conducted to directly compare dead space measured by VCAP and the DB method in critically unwell adults. Volumetric capnography (VCAP) offers a relatively simple solution to calculating dead space. These factors make this method impractical in the critical care setting. Physiological dead space should be a routine measurement in ventilated patients but measuring dead space using the Douglas bag (DB) method is cumbersome and requires corrections for compressed ventilator gas.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |