Prolonged Exhalation

Prolonged exhalation is a breathing technique in which expiration lasts longer than inspiration, helping regulate airflow and breathing effort. By slowing the release of air, often through gently narrowed lips, the technique creates mild positive pressure in the airways and can support more complete exhalation while reducing dynamic air trapping. Clinically, respiratory therapists may teach prolonged exhalation to patients with obstructive lung conditions or breathing-related distress, alongside other airway-clearance and breathing strategies. It can improve control of dyspnea, promote more efficient ventilation, and provide a simple, noninvasive tool for respiratory rehabilitation and patient self-management.

Prolonged Exhalation - Related Videos

Research

JoVE Journal - Medicine

Fast and Accurate Exhaled Breath Ammonia Measurement

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Cited by 16 •

2014

Ammonia is an important physiologic metabolite relevant to various disease and wellness states. It is also a difficult molecule to measure in breath, which demands particular precautions be taken to obtain accurate results. Not all factors influencing ammonia are known, but progress can be difficult without accounting for these factors.

Education

JoVE Core - Anatomy and Physiology

Pulmonary Cycle: Exhalation

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2024

In terms of human respiration, the act of expelling air, known as exhalation (or expiration), operates on the principle of pressure gradients. During expiration, the pressure within the lungs exceeds that of the surrounding atmosphere. Under normal conditions, quiet breathing involves passive exhalation and is free of muscular contractions. This is because the exhalation process is driven by the natural elastic recoil of the lungs and chest wall, both of which have an inherent tendency to...

Synaptic Modulation in Drosophila After Exposure to Prolonged Light

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2025

This video demonstrates the rearing of Drosophila melanogaster under specific light conditions to study the role of Bruchpilot proteins in neurotransmitter release and the resulting modulation of synaptic activity.

Measuring Neural Activity in a Mouse Brain Slice after Prolonged Incubation

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2025

This video demonstrates a technique for measuring neuronal activity in mouse brain slices using calcium imaging and electrophysiological recordings. By perfusing the tissue with potassium ions and recording intracellular calcium changes through high-speed digital imaging, this method reveals real-time neuronal responses.

Investigating Prolonged Depolarizing Afterpotential (PDA) in Drosophila Photoreceptors

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2025

This video demonstrates an experimental protocol to investigate the prolonged depolarizing afterpotential (PDA) in white-eyed Drosophila. The fly's eye is exposed to intense blue light pulses to convert the photopigment rhodopsin to metarhodopsin, initiating a signaling cascade that opens positive ion channels and causes membrane depolarization. Because blue light prevents the reconversion of metarhodopsin to rhodopsin, the continuous influx of positive ions results in sustained depolarization,...

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