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External negative pressure ventilation techniques

M Schiavina1, A Fabiani, G Gunella

  • 1Fisiopatologia Respiratoria, Policlinico S Orsola, Bologna, Italy.

Monaldi Archives for Chest Disease = Archivio Monaldi Per Le Malattie Del Torace
|December 1, 1994
PubMed
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Negative pressure ventilation (NPV) effectively treats respiratory failure from restrictive conditions. However, its long-term use in chronic airflow obstruction is less promising due to potential coordination issues and apneas.

Area of Science:

  • Pulmonary Medicine
  • Respiratory Therapy
  • Biomedical Engineering

Background:

  • External ventilation, including negative pressure ventilation (NPV), has been used for respiratory failure since the early 1900s.
  • NPV is beneficial for respiratory failure due to neuromusculoskeletal restrictive impairments.
  • Its application in chronic airflow obstruction (CAO) requires careful consideration.

Purpose of the Study:

  • To review the efficacy and limitations of long-term negative pressure ventilation.
  • To discuss various NPV devices and their functionalities.
  • To highlight the goals and potential complications of NPV.

Main Methods:

  • Discussion of historical and current negative pressure ventilators (iron lung, pneumo-wrap, cuirass).

Related Experiment Videos

  • Analysis of ventilator requirements, including controlled ventilation and adaptable patterns.
  • Review of physiological effects, particularly on hemodynamics.

    • Main Results:

    • NPV is effective for acute-on-chronic respiratory failure in CAO but less promising for long-term management.
    • Ventilators require adjustable patterns to synchronize with patient effort.
    • NPV generally has no adverse hemodynamic effects but can cause obstructive apneas during sleep.

    Conclusions:

    • NPV is a valuable tool for specific respiratory failure types, especially restrictive conditions.
    • Careful patient selection and ventilator settings are crucial for optimal outcomes.
    • Potential for sleep-related obstructive apneas necessitates monitoring and management strategies.