Video Experimental Relacionado
Updated: Apr 14, 2026
07:02
Utilizing the Modified T-Maze to Assess Functional Memory Outcomes After Cardiac Arrest
Published on: January 5, 2018
12.7K
Respiración durante el enterramiento de la nieve utilizando una bolsa de aire artificial
C K Grissom1, M I Radwin, C H Harmston
1Pulmonary Division, LDS Hospital, University of Utah, Salt Lake City 84143, USA. ldcgriss@ihc.com
JAMA
|May 12, 2000
Resumen
Un nuevo dispositivo para la supervivencia en el entierro de avalanchas extiende significativamente el tiempo de respiración mediante la gestión de los niveles de dióxido de carbono (CO2). Este sistema de bolsillo de aire artificial mejora la oxigenación en comparación con los métodos estándar, ofreciendo esperanza para las víctimas de avalanchas.
Área de la Ciencia:
- La investigación de seguridad de avalanchas de investigación de seguridad.
- Fisiología de las vías respiratorias.
- Desarrollo del desarrollo de equipos de supervivencia.
Sus antecedentes:
- La asfixia es una de las principales causas de muerte en los entierros de avalanchas.
- Un nuevo dispositivo tiene como objetivo mejorar la supervivencia mediante la gestión de dióxido de carbono expirado (CO2) dentro de una bolsa de aire artificial.
Objetivo del estudio:
- Para comparar la duración de la oxigenación y la ventilación durante el enterramiento de la nieve con y sin un dispositivo de bolsa de aire artificial que desvía el CO2.
Principales métodos:
- Un estudio de campo involucró a 8 voluntarios enterrados en la nieve, midiendo los parámetros respiratorios con y sin el dispositivo.
- La duración del entierro se limitó por solicitud del sujeto, SpO2 caída por debajo del 84%, o 60 minutos.
Principales resultados:
- El dispositivo extendió el tiempo de entierro a una media de 58 minutos frente a 10 minutos sin él (P = .001).
- La saturación de oxígeno (SpO2) se mantuvo adecuada durante más tiempo con el dispositivo, y los niveles de dióxido de carbono (ETCO2, PICO2) fueron más bajos en comparación con los controles.
Conclusiones:
- El dispositivo prolonga significativamente la oxigenación adecuada durante el enterramiento de la nieve, a pesar de inducir hipercapnia.
- Se necesitan más investigaciones para confirmar si este dispositivo mejora las tasas de supervivencia en avalanchas.
Videos de Conceptos Relacionados
01:14Ventilatory Modes
2.2K
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...
2.2K
01:27Air-entraining Agents
364
Air-entraining agents improve the durability and workability of concrete in climates with frequent freezing and thawing. These agents prevent cracks by introducing small air bubbles into the mix, creating spaces accommodating water expansion when temperatures drop. The air-entraining agents lower the surface tension of water, forming stable, small air bubbles. This method is more effective than having accidental large voids, as the intentional, smaller, and evenly distributed air voids improve...
364
01:28Effects of Air-entrainment in Concrete
509
Air entrainment in concrete significantly enhances the material's durability, especially in environments subjected to freeze-thaw cycles. Introducing small air bubbles into the concrete mix acts as internal voids that accommodate the expansion of water when it freezes, thereby alleviating internal stress and preventing structural cracks. This function is crucial in climates with significant freezing and thawing, as it protects the concrete from repeated stresses that could lead to premature...
509
01:21Cardiopulmonary Resuscitation I: Adult
1.1K
Cardiopulmonary resuscitation, or CPR, is a life-saving emergency procedure performed when a person's heart has stopped beating or they are no longer breathing. The foundation of CPR is Basic Life Support (BLS), which focuses on the early recognition of cardiac arrest, the immediate start of high-quality chest compressions, and the timely use of an automated external defibrillator (AED).Assessing Responsiveness and Checking the Carotid PulseWhen approaching an unresponsive person, first ensure...
1.1K
01:22Cardiopulmonary Resuscitation II: ACLS Airway Management
1.1K
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...
1.1K
01:30Cardiopulmonary Resuscitation V: Advanced Airway Management Techniques
871
Airway management is essential in emergency and surgical medicine, ensuring ventilation and oxygenation in patients who cannot maintain their own airway. Clinicians use a range of techniques and devices to secure the airway, depending on the patient’s condition and the clinical context. Key methods include endotracheal intubation, rapid sequence intubation (RSI), supraglottic airway devices, and advanced visualization aids. In cases where these approaches fail, surgical airway...
871