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High Tidal Volume Induces Inflammation In Normal Lungs

NCT00935896 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 20

Last updated 2009-07-09

No results posted yet for this study

Summary

Objective: To compare the effects of a protective versus a conventional ventilatory strategy, on systemic and in lung production of tumor necrosis factor-alpha (TNF-alpha) and interleukin-8 (IL-8) in patients without lung disease.

Hypothesis: High tidal volumes induce inflammation in patients without lung disease Design: Prospective control-randomized study. Patients and Setting: Twenty patients without lung disease and submitted to mechanical ventilation admitted to one trauma and one general adult intensive care unit of two different university hospitals.

Interventions: Patients were randomized to receive mechanical ventilation either with tidal volume (VT) of 10-12 ml/kg predicted body weight (high VT group) or with VT of 5-7 ml/kg predicted body weight (low VT group) with an O2 inspiratory fraction (FIO2) enough to keep arterial oxygen saturation \> 90% with positive end-expiratory pressure (PEEP) of 5 cmH2O during 12 hours after admission to the study.

Conditions

  • Mechanically Ventilated Patients
  • Normal Lungs

Interventions

PROCEDURE

Low tidal volume

twenty patients were randomly (opaque sealed envelopes) assigned to receive mechanical ventilation in volume-controlled mode either with VT of 10-12 ml/kg predicted body weight (high VT group, n=10) or with VT of 5-7 ml/kg predicted body weight (low VT group, n=10) with an inspiratory fraction of oxygen (FIO2) set at the minimal level at which an arterial oxygen saturation of \> 90% and minimal PEEP (4-5cmH2O). The predicted body weight of male patients was calculated as equal to 50+0.91(centimeters of height-152.4); that of female patients was calculated as equal to 45.5+0.91(centimeters of height-152.4).

PROCEDURE

Low tidal volume

Immediately after ICU admission, once all inclusion and exclusion criteria were met and consent obtained, twenty patients (16 men, 4 women, median age of 49 yrs) were randomly (opaque sealed envelopes) assigned to receive mechanical ventilation in volume-controlled mode either with VT of 10-12 ml/kg predicted body weight (high VT group, n=10) or with VT of 5-7 ml/kg predicted body weight (low VT group, n=10) with an inspiratory fraction of oxygen (FIO2) set at the minimal level at which an arterial oxygen saturation of \> 90% and minimal PEEP (4-5cmH2O). The predicted body weight of male patients was calculated as equal to 50+0.91(centimeters of height-152.4); that of female patients was calculated as equal to 45.5+0.91(centimeters of height-152.4)

OTHER

low tidal volume

tidal volume of 5-7 ml/kg predicted body weight

Sponsors & Collaborators

  • Programa de Pós-Graduação em Clínica Médica

    collaborator UNKNOWN

  • Faculdade de Medicina

    collaborator AMBIG

  • Federal University of Rio Grande do Sul

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
SUPPORTIVE_CARE
Masking
NONE

Eligibility

Min Age
16 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Countries

  • Brazil

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT00935896 on ClinicalTrials.gov