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Related Concept Videos

Mechanical Ventilation I: Indication and Settings01:29

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Mechanical ventilation is a life-saving technique for managing acute respiratory failure and other respiratory complications. The process involves using a machine known as a ventilator to supply oxygen to the lungs and assist in removing carbon dioxide. It serves as a bridge to long-term mechanical ventilation or a temporary measure until ventilatory support is discontinued. The ventilator can maintain this function for a prolonged period, providing critical support for patients until they can...
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Ventilators are essential medical equipment used to aid patients with respiratory difficulties. Their primary function is to assist or replace spontaneous breathing by providing mechanical ventilation. There are two general classes of mechanical ventilators: negative-pressure and positive-pressure ventilators.
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Mechanical Ventilation III: Noninvasive Ventilation01:23

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Noninvasive positive-pressure ventilation (NIPPV), continuous positive airway pressure (CPAP), and bilevel positive airway pressure (BiPAP) are essential methods in respiratory care. These ventilation techniques offer unique benefits for patients with various respiratory conditions, providing adequate support without requiring intubation. Let's explore how each method is crucial in improving patient outcomes and enhancing respiratory therapy.
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Ventilatory Modes01:14

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Backrest Elevation and Tissue Interface Pressure by Anatomical Location During Mechanical Ventilation.

Mary Jo Grap1, Cindy L Munro2, Paul A Wetzel2

  • 1Mary Jo Grap is an emeritus professor and Ruth S. Burk is affiliate faculty, Adult Health and Nursing Systems Department, School of Nursing, Paul A. Wetzel is an associate professor and Anathea Pepperl is an assistant professor, Biomedical Engineering Department, School of Engineering, and Valentina Lucas is a nurse practitioner, Department of Surgery, Virginia Commonwealth University, Richmond, Virginia. Cindy L. Munro is a professor and associate dean, Research and Innovation, College of Nursing, University of South Florida, Tampa, Florida. Christine M. Schubert is an associate professor, Department of Mathematics and Statistics, Air Force Institute of Technology, Wright-Patterson Air Force Base, Dayton, Ohio. mjgrap@vcu.edu.

American Journal of Critical Care : an Official Publication, American Association of Critical-Care Nurses
|May 3, 2016
PubMed
Summary

Elevating the head of the bed for patients on mechanical ventilation affects skin pressure, with higher elevations potentially increasing pressure on certain body areas. Individual patient factors like BMI and movement influence pressure ulcer and pneumonia risks.

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Area of Science:

  • Critical Care Medicine
  • Biomedical Engineering
  • Nursing Research

Background:

  • Head-of-bed elevation recommendations differ: <30° for pressure ulcer prevention, >30° for ventilator-associated pneumonia risk reduction.
  • Interface pressure varies with backrest angle and body location (sacrum, heels).

Purpose of the Study:

  • To quantify the relationship between backrest elevation, anatomical location, and skin pressure intensity in mechanically ventilated patients.

Main Methods:

  • Longitudinal study of 133 adult intensive care unit patients receiving mechanical ventilation.
  • Continuous measurement of backrest elevation and skin pressure for 72 hours using inclinometers and pressure mapping.
  • Mean tissue interface pressure assessed at 7 anatomical areas (scapula, trochanter, sacrum, heels).

Main Results:

  • Each 1° increase in backrest elevation reduced mean interface pressure by 0.09–0.42 mm Hg.
  • Increased body mass index correlated with higher trochanter pressure (0.22–0.24 mm Hg per unit increase).
  • Knee angle and patient mobility were significant covariates.

Conclusions:

  • Individual factors (BMI, movement) are crucial for pressure ulcer and ventilator-associated pneumonia risk.
  • Tailored positioning strategies are needed to optimize patient outcomes.