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Related Concept Videos

Assessment of Ventilation I: Respiratory Rate01:20

Assessment of Ventilation I: Respiratory Rate

Assessment of Ventilation
A Ventilation assessment is critical for monitoring a patient's health status. Respiration, one of the most accessible vital signs, provides insights into the function of numerous body systems and can indicate serious health issues, such as brainstem injuries from head trauma.
Critical Guidelines for Assessing Ventilation:
Respiratory Volumes and Capacities01:22

Respiratory Volumes and Capacities

The respiratory system is responsible for the intake of oxygen and the expulsion of carbon dioxide from the body. Respiratory volumes describe the volume of air in the lungs at different phases of the respiratory cycle. Tidal volume is the air breathed in and out during normal, quiet breathing. Inspiratory reserve volume is the air that can be forcefully inspired beyond the tidal volume. In contrast, expiratory reserve volume refers to the air that can be expelled from the lungs after a normal...
Assessment of Ventilation II: Respiratory Depth and Rhythm01:29

Assessment of Ventilation II: Respiratory Depth and Rhythm

Respiratory Depth
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:
Physiological Control of Respiration01:23

Physiological Control of Respiration

Introduction
Breathing, a seemingly passive process, is regulated by the respiratory center in the brainstem. This center coordinates the involuntary control of respirations, which means it occurs without conscious effort, ensuring a smooth and uninterrupted pattern.
Regulation of Ventilation
The body maintains ventilation by monitoring levels of carbon dioxide (CO2), oxygen (O2), and hydrogen ion concentration (pH) in the arterial blood. Among these factors, the level of CO2 plays a crucial...
Mechanical Ventilation I: Indication and Settings01:29

Mechanical Ventilation I: Indication and Settings

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...
Respiratory Volumes01:15

Respiratory Volumes

Respiratory volumes are crucial metrics, meticulously measured to quantify the air exchanged in and out of the lungs during various phases of the breathing cycle. These precise measurements are vital for assessing lung function, diagnosing respiratory conditions, and monitoring overall respiratory health. Each parameter provides specific insights into the mechanics of breathing and the functional capacity of the lungs.
Tidal Volume (TV) Tidal volume (TV) is the air inhaled or exhaled in a...

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Phase-Resolved Functional Lung MRI for Pulmonary Ventilation and Perfusion (V/Q) Assessment
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Ventilation - how often are we correct?

D Dennis1, W Jacob, P V van Heerden

  • 1Intensive Care Unit, Sir Charles Gairdner Hospital, Perth, Western Australia, Australia. Diane.Dennis@health.wa.gov.au

Anaesthesia and Intensive Care
|July 21, 2012
PubMed
Summary
This summary is machine-generated.

Intensive care clinicians often use lower tidal volumes (Vt) for mechanical ventilation. This study found that while prescribed volumes were often correct, actual delivered volumes require constant monitoring for safe patient care.

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Area of Science:

  • Critical Care Medicine
  • Respiratory Therapy
  • Pulmonary Physiology

Background:

  • Traditional mechanical ventilation utilized tidal volumes (Vt) of 10-15 ml/kg.
  • Current practice often employs lower Vt (6-8 ml/kg) as a conservative strategy.
  • Bedside estimation of Vt is common among clinicians.

Purpose of the Study:

  • To assess the accuracy of tidal volume (Vt) determination by intensive care clinicians during mechanical ventilation.
  • To evaluate the delivered Vt in mechanically ventilated patients using a conservative approach.

Main Methods:

  • Observational study in a 23-bed level 3 intensive care unit.
  • 55 observations of synchronized intermittent mandatory ventilation with autoflow mode.
  • Primary outcome: delivered Vt at the time of observation.

Main Results:

  • 33 (60%) observations recorded volumes between 6-8 ml/kg.
  • Actual delivered volumes were accurate in all but two patients.
  • 13% ICU mortality in patients receiving higher than anticipated Vts (n=15).

Conclusions:

  • Lower tidal volumes are generally achieved, supporting a protective ventilation strategy.
  • Constant monitoring of delivered Vt is crucial, not just dialled settings.
  • Ensuring accurate delivered Vt is vital for patient outcomes in mechanical ventilation.