Comparison of Auto-PEEP Levels Measured by End-expiratory Port Occlusion Method and Trapped Lung Volume.
- Author:
Jang Won SOHN
1
;
Chae Man LIM
;
Younsuck KOH
Author Information
1. Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Korea.
- Publication Type:Original Article
- Keywords:
Static auto-PEEP;
Compliance;
Trapped lung volume
- MeSH:
Compliance;
Humans;
Lung*;
Positive-Pressure Respiration, Intrinsic*;
Respiration, Artificial;
Respiratory Mechanics
- From:The Korean Journal of Critical Care Medicine
2005;20(2):131-135
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
BACKGROUND: There are several METHODS: for auto-PEEP measurement during mechanical ventilation. The end-expiratory port occlusion (EEPO) method is simple and easy. Theoretically, auto- PEEP level can be also calculated by using trapped lung volume and static compliance. However, the relationship between measured auto-PEEP by EEPO method and the calculated auto-PEEP has not been studied. The purpose of this study is to observe the relationship between the measured and the calculated auto-PEEP. METHODS: 15 patients with auto-PEEP during mechanical ventilation were included. Auto-PEEP was measured by EEPO method, and calculated by using a formula; trapped lung volume/static compliance. All of the patients were paralyzed during the study. If the measured auto-PEEP is higher than calculated auto-PEEP, this patient was included in `high group'; in the opposite case, `low group'. We compared respiratory mechanics between these two groups. RESULTS: Measured auto-PEEP was 9.60+/-2.82 cmH2O, and calculated auto-PEEP was 9.78+/-2.90 cmH2O. There was statistically significant relationship between measured and calculated auto-PEEP (r=0.81, p<0.01). There was no difference on respiratory mechanics between `high group' and `low group'. CONCLUSIONS: The auto-PEEP obtained by calculation with trapped lung volume and static compliance showed a good correlation with that of using EEPO method in the paralyzed patients.
