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Related Concept Videos

Overview of Systemic and Pulmonary Circulation01:15

Overview of Systemic and Pulmonary Circulation

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The systemic and pulmonary circuits are crucial components of the circulatory system, working together to transport blood between the heart, lungs, and the rest of the body. The process begins with pulmonary circulation, where deoxygenated blood is pumped from the right ventricle to the lungs via the pulmonary trunk and arteries. Upon reaching the lungs, the blood becomes oxygenated and returns to the heart, specifically to the left atrium, via the pulmonary veins.
The oxygenated blood is sent...
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Mechanical Systems01:22

Mechanical Systems

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Mechanical systems are analogous to to electrical networks where springs and masses play similar roles to inductors and capacitors, respectively. A viscous damper in mechanical systems functions similarly to a resistor in electrical networks, dissipating energy. The forces acting on a mass in such systems include an applied force in the direction of motion, counteracted by forces from the spring, a viscous damper, and the mass's acceleration. This interplay of forces is mathematically...
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Ventilatory Modes01:14

Ventilatory Modes

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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...
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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.
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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Mechanical Ventilation III: Noninvasive Ventilation01:23

Mechanical Ventilation III: Noninvasive Ventilation

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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.
Noninvasive Positive-Pressure Ventilation...
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Anatomy of the Circulatory System02:03

Anatomy of the Circulatory System

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The human circulatory system consists of blood, blood vessels that carry blood away from the heart, around the body, and back to the heart, and the heart itself, which acts as a central pump. The systemic circuit supplies blood to the whole body, the coronary circuit supplies blood to the heart, and the pulmonary circuit supplies blood flow between the heart and lungs.
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Use of Two Intracorporeal Ventricular Assist Devices As a Total Artificial Heart
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Mechanical circulatory support systems: evolution, the systems and outlook.

Roland Hetzer1, Mariano Francisco Del Maria Javier1, Michael Dandel1

  • 1Department of Cardiothoracic and Vascular Surgery, Cardio Centrum Berlin, Berlin, Germany.

Cardiovascular Diagnosis and Therapy
|March 12, 2021
PubMed
Summary
This summary is machine-generated.

Mechanical circulatory support devices, like ventricular assist devices (VADs), offer reliable solutions for heart failure due to donor organ shortages. Ongoing technological advancements aim to improve VAD safety, efficacy, and patient outcomes.

Keywords:
Continuous flow ventricular assist device (continuous flow VAD)extracorporeal ventricular assist device (extracorporeal VAD)pulsatile pumpsthromboembolismtotal artificial heart (TAH)

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Area of Science:

  • Biomedical Engineering
  • Cardiology
  • Surgical Innovation

Background:

  • Shortage of donor organs drives development of mechanical circulatory support.
  • Mechanical devices provide temporary or permanent circulatory support for heart failure.
  • Previous devices faced challenges like thromboembolism and pump complications.

Purpose of the Study:

  • To review the evolution and current status of mechanical circulatory support devices.
  • To highlight the role of these devices in managing advanced heart failure.
  • To discuss future directions in device development for improved patient outcomes.

Main Methods:

  • Review of advancements in surgery, medicine, and biomedical engineering.
  • Analysis of historical and current mechanical circulatory support systems.
  • Discussion of technological trends and challenges in the field.

Main Results:

  • Several mechanical circulatory support systems have evolved for short and long-term use.
  • Modern devices demonstrate durability and reliability.
  • Ongoing research focuses on miniaturization, improved energy supply, and reduced complications.

Conclusions:

  • Mechanical circulatory support, particularly ventricular assist devices (VADs), is crucial for severe heart failure.
  • Technological progress is key to overcoming current limitations.
  • VADs are expected to become a primary surgical option for heart failure treatment.