In patients without lung disease, ventilated either mechanically or spontaneously via a tracheal tube, the arterial to end-tidal carbon dioxide gradient values were 0. The objective of our study was to show that monitoring of ETCO 2 provides a clinically useful and effective method for assessing ventilation.
Russell and Graybeal, reported that in mechanically ventilated neurointensive care patients, there is significant variability in the relationship between PaCO 2 and ETCO 2 In another study that was conducted by Russsell et al. They concluded that ETCO 2 may not provide a statistically stable estimation of PaCO 2 in mechanically ventilated neurosurgical patients undergoing craniotomies In a recent report, Warner et al.
The results of another study indicated that hypercapnia may be underestimated when ETCO 2 is substituted for PaCO 2 in patients breathing spontaneously via a cuffed oropharyngeal airway Belpomme et al. In a study that was conducted on hyperventilated neurosurgical patients, the values of ETCO 2 showed a moderately acceptable correlation with PaCO 2 measurements.
However, changes in end-tidal carbon dioxide values failed to correlate with simultaneous changes in arterial carbon dioxide tension measures Palmon et al.
The results of their study do not support routine monitoring of end-tidal CO 2 during short transport times in adult patients requiring mechanical ventilation. Kavanagh et al. In conclusion, end-tidal CO 2 measurement provides an accurate estimation of PaCO 2 in mechanically ventilated patients. ETCO 2 monitoring in adult ventilated patients may be a useful tool in their management.
A comparison of mean differences between PaCO 2 and ETCO 2 in three different modes of ventilation did not show any statistical significance. Additional studies in relation to the efficiency of CO 2 monitoring during various phases of mechanical ventilation are recommended. The authors wish to acknowledge Deputy of Research of Kashan University of Medical Sciences for its financial support in this study as a part of a MD thesis grant No Arch Trauma Res.
DOI: Financial Disclosure: None declared. National Center for Biotechnology Information , U. Journal List Arch Trauma Res v. Published online Aug Author information Article notes Copyright and License information Disclaimer.
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This article has been cited by other articles in PMC. Abstract Background: Patients undergone mechanical ventilation need rapid and reliable evaluation of their respiratory status. Objectives: The aim of the present trial was to study the relationship between end-tidal CO 2 tensions with PaCO 2 measurements in mechanically ventilated patients. Materials and Methods: End-tidal carbon dioxide levels were recorded at the time of arterial blood gas sampling. Results: A total of arterial blood gases were obtained from 87 patients mean age, Conclusions: End-tidal CO 2 measurement provides an accurate estimation of PaCO 2 in mechanically ventilated patients.
Background End-tidal CO 2 monitors are used to estimate arterial CO 2 pressure PaCO 2 , but appropriate use of this noninvasive method of assessing blood gases in ventilated patients remains unclear. Objectives The aim of the present trial was to study the relationship between end-tidal CO 2 tensions with PaCO 2 measurements in mechanically ventilated patients. Results A total of arterial blood gases were obtained from the 87 patients. Received 22 Nov Revised 26 Jan Accepted 10 Feb Published 02 Mar Abstract Objective.
Introduction End-tidal carbon dioxide ETCO 2 is clinically used as a positive indicator of endotracheal intubation, an alert in the event of disconnection, and an estimation of arterial CO 2 tension PaCO 2. Table 1. Figure 1. Comparison of arterial to end-tidal partial pressure gradient of carbon dioxide among groups according to age. There is a significant difference between the two groups.
The arterial to end-tidal partial pressure gradient of carbon dioxide tends to increase with increasing age, and there is a significant difference between Group A and Groups F and G.
Figure 2. Relationship between arterial to end-tidal partial pressure gradient of carbon dioxide and age. A poor positive correlation is found between the arterial to end-tidal partial pressure gradient of carbon dioxide and age ,.
References K. Bhavani-Shankar, H. Moseley, A. Kumar, and Y. Takki, U. Aromaa, and A. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website.
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