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Related Concept Videos

Mechanical Ventilation II: Invasive Ventilation01:23

Mechanical Ventilation II: Invasive Ventilation

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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.
Negative-Pressure Ventilators
Negative-pressure ventilators create a vacuum around the chest or body to draw air into the lungs, simulating breathing. This method does not require an...
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Assessment of Ventilation I: Respiratory Rate01:20

Assessment of Ventilation I: Respiratory Rate

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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:
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Mechanical Ventilation I: Indication and Settings01:29

Mechanical Ventilation I: Indication and Settings

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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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Physical Assessment of the Respiratory Tract II: Inspection01:27

Physical Assessment of the Respiratory Tract II: Inspection

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Physical assessment of the respiratory tract through inspection is a crucial step in understanding the patient's respiratory health. It provides insights into the functioning of the respiratory system, the musculoskeletal structure, and even the patient's nutritional status. This comprehensive approach involves observing several vital aspects: chest configuration, breathing patterns, respiratory rates, skin color, and use of accessory muscles.
Chest Configuration
The chest configuration...
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Assessment of Ventilation II: Respiratory Depth and Rhythm01:29

Assessment of Ventilation II: Respiratory Depth and Rhythm

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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:
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Radiological Investigation II: MRI and Ventilation Perfusion Scan01:30

Radiological Investigation II: MRI and Ventilation Perfusion Scan

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Description
Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
MRI
MRI uses magnetic fields and radiofrequency signals to distinguish between normal and abnormal tissues. This technology provides a more detailed diagnostic image than CT scans, enabling it to characterize pulmonary nodules, stage bronchogenic carcinoma, and evaluate inflammatory activity in...
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Monitoring Lung Function with Electrical Impedance Tomography in the Intensive Care Unit
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Electrical Impedance Tomography-based Ventilation Patterns in Patients after Major Surgery.

Hirofumi Iwata1, Takeshi Yoshida1, Taiki Hoshino1

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Postoperative patients exhibit distinct lung ventilation patterns. Inhomogeneous patterns, identified by electrical impedance tomography (EIT), are linked to increased pulmonary complications and longer intensive care unit stays.

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Area of Science:

  • Critical Care Medicine
  • Respiratory Physiology
  • Medical Imaging

Background:

  • General anesthesia and mechanical ventilation can disrupt lung aeration distribution.
  • Understanding postoperative ventilation patterns is crucial for predicting clinical outcomes.

Purpose of the Study:

  • To identify distinct ventilation patterns in postoperative patients using electrical impedance tomography (EIT).
  • To assess the association between these ventilation patterns and postoperative pulmonary complications (PPCs) and other clinical outcomes.

Main Methods:

  • Prospective enrollment of 128 high-risk adult postoperative patients receiving mechanical ventilation.
  • Utilized EIT to classify ventilation patterns into three phenotypes: ventral predominance, homogeneous, and dorsal predominance.
  • Monitored PPCs, time to wean from mechanical ventilation and oxygen, and ICU length of stay.

Main Results:

  • Three ventilation phenotypes were identified: homogeneous (41%), ventral predominance (32%), and dorsal predominance (27%).
  • Higher PPC scores were observed in patients with ventral or dorsal predominance compared to homogeneous patterns.
  • Inhomogeneous patterns (ventral/dorsal predominance) were associated with longer mechanical ventilation weaning times, oxygen use duration, and ICU stays.

Conclusions:

  • Inhomogeneous lung ventilation patterns detected by EIT upon ICU admission correlate with increased PPCs.
  • These patterns also predict delayed weaning from mechanical ventilation and oxygen support.
  • EIT-derived ventilation phenotypes offer valuable prognostic information for postoperative patients.