Related Experiment Video
Updated: Jul 18, 2026
12:09
Ex Vivo Porcine Experimental Model for Studying and Teaching Lung Mechanics
Published on: April 19, 2024
Pressure-controlled versus volume-controlled one-lung ventilation for MIDCAB.
C Heimberg1, M Winterhalter, M Strüber
1Department of Anaesthesiology, Hanover Medical School, Hannover, Germany. heimberg.claus@mh-hannover.de
The Thoracic and Cardiovascular Surgeon
|December 8, 2006
Summary
Pressure-controlled ventilation improves oxygen levels during one-lung ventilation in cardiovascular surgery patients. This method reduces airway pressure and enhances gas exchange compared to volume-controlled ventilation.
Area of Science:
- Anesthesiology
- Cardiothoracic Surgery
- Critical Care Medicine
Background:
- One-lung ventilation (OLV) presents challenges like hypoxemia and increased airway pressures.
- Previous research focused on patients with pulmonary disease, leaving a gap in understanding for cardiovascular patients.
Purpose of the Study:
- To compare pressure-controlled ventilation (PCV) versus volume-controlled ventilation (VCV) during OLV in patients undergoing thoracotomy for cardiovascular disease.
- To assess the impact of ventilation strategy on gas exchange and hemodynamic parameters.
Main Methods:
- Fifty patients undergoing thoracotomy were randomized to either PCV or VCV during OLV.
- Ventilation parameters, pulmonary function, and systemic/pulmonary hemodynamics were recorded and compared between groups.
Main Results:
- VCV resulted in significantly higher peak airway pressure, dead space ventilation, and arterial carbon dioxide levels.
- PCV group demonstrated a lower alveolar-arterial oxygen tension difference and higher arterial oxygen partial pressure, particularly noted in intensive care unit patients.
Conclusions:
- Pressure-controlled ventilation may be a superior strategy for improving gas exchange during one-lung ventilation in cardiovascular surgery.
- PCV may facilitate alveolar recruitment and enhance oxygenation in this patient population.
Related Concept Videos
01:23Mechanical 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...
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...
01:14Ventilatory 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...
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...
01:29Mechanical 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...
01:23Mechanical 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)
Noninvasive Positive-Pressure Ventilation (NIPPV)
01:23Physiological 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...
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...
01:22Cardiopulmonary Resuscitation II: ACLS Airway Management
Airway management is a key skill in emergency and critical care settings, as maintaining a clear airway is essential for adequate oxygenation and ventilation.Head Tilt-Chin Lift TechniqueThe head tilt-chin lift maneuver is an essential technique primarily used in patients without suspected cervical spine injuries. To perform this maneuver, one hand is placed on the patient’s forehead, and gentle pressure is applied backward to tilt the head. The fingertips of the other hand are positioned under...