Endotracheal tube intraluminal volume loss among mechanically ventilated patients

Crit Care Med. 2004 Jan;32(1):120-5. doi: 10.1097/01.CCM.0000104205.96219.D6.

Abstract

Objective: To measure endotracheal tube intraluminal volume loss among mechanically ventilated patients.

Design: Prospective observational study.

Setting: Medical intensive care unit (19 beds) of an urban university-affiliated teaching hospital.

Patients: A total of 101 patients with acute respiratory failure requiring >24 hrs of mechanical ventilation.

Interventions: None.

Measurements and main results: Acoustic reflectometry was employed to measure the intraluminal volume of 13-cm endotracheal tube segments. The endotracheal tube segment volumes were statistically smaller among endotracheal tubes used in patients compared with unused endotracheal tubes (5.4 +/- 0.7 vs. 6.0 +/- 0.6 mL, p <.001). The average percentage difference in endotracheal tube segment volumes, between the unused endotracheal tubes and the endotracheal tubes used in patients, was 9.8% (range, 0-45.5%). The percentage difference in the endotracheal tube segment volumes increased significantly with increasing duration of tracheal intubation (r2 =.766, p <.001). The minimum diameter of the endotracheal tube segments was also statistically smaller among endotracheal tubes used in patients compared with the unused endotracheal tubes (7.5 +/- 0.4 vs. 6.7 +/- 1.2 mm, p <.001).

Conclusions: Endotracheal tube intraluminal volume loss is common among patients with acute respiratory failure requiring mechanical ventilation and increases with prolonged tracheal intubation.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biofilms
  • Cohort Studies
  • Critical Illness / therapy
  • Device Removal
  • Equipment Failure
  • Equipment Safety
  • Female
  • Follow-Up Studies
  • Hospitals, Teaching
  • Humans
  • Intensive Care Units
  • Intubation, Intratracheal / instrumentation*
  • Intubation, Intratracheal / methods
  • Male
  • Probability
  • Prospective Studies
  • Respiration, Artificial / instrumentation*
  • Respiration, Artificial / methods
  • Respiratory Distress Syndrome, Adult / diagnosis
  • Respiratory Distress Syndrome, Adult / therapy*
  • Risk Assessment
  • Treatment Outcome
  • Ventilators, Mechanical / adverse effects*