Measurement of Auto-PEEP in Anesthetized Patients Using a Laser-Flex Endotracheal Tube with Changes in Respiratory Rates and Tidal Volume.
10.4097/kjae.2001.40.4.476
- Author:
Kyu Sam HWANG
1
;
Eun Ha SUK
;
Su Keoung LEE
;
Hyun Sook HWANG
;
Eun Joo OH
;
Pyung Hwan PARK
Author Information
1. Department of Anesthesiology, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea.
- Publication Type:Original Article
- Keywords:
Equipment: endotracheal tube;
Lung: auto-PEEP;
Surgery: laser
- MeSH:
Humans;
Positive-Pressure Respiration, Intrinsic*;
Respiratory Rate*;
Tidal Volume*;
Ventilators, Mechanical
- From:Korean Journal of Anesthesiology
2001;40(4):476-482
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
BACKGROUND: The aim of the present study was to detect and quantify auto-positive end-expiratory pressure (auto-PEEP) in anesthetized patients using a Laser-Flex endotracheal tube (Mallincrodt, ID, 6.0 mm), by comparing the effects of changes in tidal volume and respiratory rate. METHODS: All patients (n = 30) undergoing elective surgery were anesthetized, paralyzed and intubated with a ID 8.0 mm endotracheal tube (n = 10, control), ID 6.0 mm endotracheal tube (n = 10, group S), or ID 6.0 mm Laser-Flex endotracheal tube (n = 10, group L), respectively. After anesthetic induction, ventilator settings using a Siemens Servo 900C were changed for a tidal volume of 8, 10 ml/kg, respiratory rates of 10, 12 or 14 breaths/min. Peak airway pressure was measured and auto-PEEP was quantified using an end-expiratory occlusion method. Data recorded on the Bicore CP-100 pulmonary monitor was transfered to a PC and analyzed by processing software (ANADAT). RESULTS: In group S and L, peak airway pressure and auto-PEEP were higher than control group and increased during an increase in tidal volume (P < 0.05). But they were increased significantly during an increase of respiratory rate, only when the tidal volume was 10 ml/kg (P < 0.05). CONCLUSIONS: There was an increase of auto-PEEP in anesthetized patients using a Laser-Flex endotracheal tube during incremental changes of tidal volume and respiratory rates.
