Intratracheal pressure monitoring during synchronized intermittent mandatory ventilation and pressure controlled-inverse ratio ventilation.
Crit Care Med
; 25(2): 227-30, 1997 Feb.
Article
em En
| MEDLINE
| ID: mdl-9034255
ABSTRACT
OBJECTIVES:
To directly measure airway pressures proximal and distal to endotracheal tubes during conventional synchronized intermittent mandatory ventilation (SIMV) and pressure controlled-inverse ratio ventilation (PC-IRV), and to compare them with these values measured by the ventilator.DESIGN:
Prospective, nonrandomized study.SETTING:
Surgical intensive care unit at a trauma center. PATIENTS Group 1 Eight intubated adult patients connected to mechanical ventilators in the SIMV mode were studied. All patients required mechanical ventilation following traumatic injuries. Group 2 Five intubated adult patients with adult respiratory distress syndrome connected to mechanical ventilators were studied.INTERVENTIONS:
A small polyethylene catheter was threaded through each endotracheal tube such that it could be positioned to measure pressures proximal and distal to the tubes. MEASUREMENTS AND MAINRESULTS:
During SIMV, a significant pressure gradient exists across endotracheal tubes. In addition, although initiation of PC-IRV did lead to a lower peak airway pressure measured proximally, intratracheal peak airway pressure was unchanged.CONCLUSIONS:
A pressure gradient exists during inspiration from the ventilator to the trachea in mechanically ventilated patients. Tracheal pressures cannot be predicted from proximal airway pressure monitors because of marked variation in endotracheal tube resistance in vivo. Initiation of PC-IRV does not result in a decrease in peak airway pressure when measured intratracheally.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Respiração Artificial
Tipo de estudo:
Observational_studies
/
Risk_factors_studies
Limite:
Adult
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Crit Care Med
Ano de publicação:
1997
Tipo de documento:
Article
País de afiliação:
Estados Unidos