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Related Concept Videos

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...
Ventilatory Modes01:14

Ventilatory Modes

Mechanical ventilators are life-saving devices that support or replace spontaneous breathing. They deliver breaths to patients through varying methods known as ventilator modes. Understanding these modes is critical for healthcare providers managing patients with respiratory failure.
There are three ventilatory modes: full support, partial support, and spontaneous. These are described below.
Full Support Modes
Full support modes include controlled mechanical ventilation, continuous mandatory...
Mechanical Ventilation II: Invasive Ventilation01:23

Mechanical Ventilation II: Invasive Ventilation

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...
Mechanical Ventilation III: Noninvasive Ventilation01:23

Mechanical Ventilation III: Noninvasive Ventilation

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.
Noninvasive Positive-Pressure Ventilation (NIPPV)
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:
Factors Affecting Pulmonary Ventilation01:19

Factors Affecting Pulmonary Ventilation

Besides the pressure difference between the external environment and the lungs, the airflow rate and ease of pulmonary ventilation are also influenced by three other factors: surface tension of the fluid in the alveoli, compliance of the lungs, and airway resistance.
Alveolar Surface Tension
The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...

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Combining Volumetric Capnography And Barometric Plethysmography To Measure The Lung Structure-function Relationship
08:25

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Ventilation parameters used to guide cardiopulmonary function during mechanical ventilation.

Jin-Won Huh1, Younsuck Koh

  • 1Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.

Current Opinion in Critical Care
|April 9, 2013
PubMed
Summary

New bedside tools estimate cardiopulmonary function during positive pressure ventilation (PPV). These include pressure changes, pulse pressure variation, capnometry, lung ultrasound, functional residual capacity (FRC), and electric impedance tomography (EIT).

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Area of Science:

  • Critical Care Medicine
  • Respiratory Physiology
  • Cardiopulmonary Monitoring

Background:

  • Positive pressure ventilation (PPV) requires accurate assessment of cardiopulmonary function.
  • Traditional methods may not fully capture dynamic physiological changes during ventilation.
  • Novel non-invasive parameters are emerging for bedside use.

Purpose of the Study:

  • To review newly introduced bedside ventilation parameters.
  • To describe their role in estimating cardiopulmonary function during PPV.
  • To highlight their potential in managing respiratory failure.

Main Methods:

  • Review of recent literature on ventilation parameters.
  • Description of parameters like PEEP-induced CVP changes and pulse pressure variation.
  • Inclusion of capnometry, lung ultrasound, FRC measurement, and EIT.

Main Results:

  • PPV causes measurable pressure changes (e.g., right atrial pressure).
  • Pulse pressure variation and PEEP-induced CVP changes predict fluid responsiveness, even with low tidal volumes.
  • Capnometry aids in monitoring perfusion and cardiac output; ultrasound and EIT offer lung/diaphragm assessment.

Conclusions:

  • Lung ultrasound utility is growing.
  • FRC measurement and EIT require further clinical validation, especially in severe hypoxic respiratory failure.
  • Development of an integrated alarm index using non-invasive parameters is needed for preemptive management.