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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.
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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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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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Once the aorta traverses the diaphragmatic plane at the aortic hiatus, it is known as the abdominal aorta. This anatomical structure is positioned leftward of the spinal column, encased within a cocoon of adipose tissue behind the peritoneal cavity. It terminates at the L4 vertebra, where it splits into the common iliac arteries. Prior to this bifurcation, the abdominal aorta gives rise to several vital branches.
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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.
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Pulmonary ventilation is a vital process that ensures the exchange of oxygen and carbon dioxide in the lungs. It refers to the movement of air into and out of the lungs, enabling the body to obtain oxygen and remove waste carbon dioxide. In this article, we will explore the intricacies of pulmonary ventilation, including its underlying principles, mechanisms, and the interplay of pressures within the respiratory system.
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A Mechanical Intermittent Abdominal Pressure Ventilator.

John R Bach1, Mark Radbourne, Nikhil Potpally

  • 1From the Department of Physical Medicine and Rehabilitation, Rutgers New Jersey Medical School, Newark, New Jersey (JRB, NP); Minneapolis, Minnesota (MR); and Department of Rehabilitation and Human Performance, Icahn School of Medicine at Mount Sinai, New York, New York (MC).

American Journal of Physical Medicine & Rehabilitation
|February 8, 2019
PubMed
Summary

A new mechanically driven intermittent abdominal pressure ventilator was developed to assist patients requiring ventilatory support. This device effectively normalized breathing and relieved shortness of breath for a postpolio survivor.

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Area of Science:

  • Biomedical Engineering
  • Respiratory Medicine
  • Rehabilitation Technology

Background:

  • Intermittent abdominal pressure ventilators were historically used for daytime ventilatory support.
  • A shift to invasive mechanical ventilation occurred in the late 1960s.
  • Current portable ventilators lack the power to adequately operate existing abdominal pressure ventilators.

Purpose of the Study:

  • To describe a novel mechanically driven intermittent abdominal pressure ventilator.
  • To evaluate its efficacy in a patient requiring ventilatory support.

Main Methods:

  • A new mechanically driven intermittent abdominal pressure ventilator was developed using a 1-pound motor.
  • The device delivered abdominal compression of nearly 2 inches in 1.05 to 1.13 seconds.
  • Its performance was assessed in a 72-year-old postpolio survivor over a 9-month period.

Main Results:

  • The ventilator normalized alveolar ventilation by increasing tidal volumes by over 300 ml (from 200-320 ml).
  • It normalized respiratory rate and relieved dyspnea.
  • Normal oxyhemoglobin saturation levels were maintained during daytime hours.

Conclusions:

  • The new mechanically driven intermittent abdominal pressure ventilator offers a viable alternative for patients needing non-invasive ventilatory support.
  • It successfully provided continuous daytime ventilatory assistance for a postpolio patient.
  • This technology addresses limitations of current portable ventilatory devices.