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Related Concept Videos

Nose and Nasal Cavity01:24

Nose and Nasal Cavity

The nose is composed of an observable exterior segment (external nose) and an internal segment within the skull known as the nasal cavity (internal nose). The external nose, visible on the face, consists of a framework of bone and hyaline cartilage enveloped in skin and muscle and lined with a mucous membrane. This structure is supported by the frontal bone, nasal bones, and maxillary bone and is supplemented by a cartilaginous framework comprising the septal nasal cartilage, lateral nasal...
Pressure Relationships in Thoracic Cavity01:24

Pressure Relationships in Thoracic Cavity

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Pneumothorax is a medical condition defined by the buildup of air in the pleural space between the lungs and the chest wall. This accumulation of air can lead to partial or complete lung collapse, resulting in a range of clinical manifestations. Understanding the clinical presentation and effective management strategies is crucial for healthcare professionals in providing timely and appropriate care to individuals with pneumothorax.
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Related Experiment Video

Updated: Jun 22, 2026

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Thoracic pressure and nasal patency.

V Singh

    Journal of Applied Physiology (Bethesda, Md. : 1985)
    |January 1, 1987
    PubMed
    Summary
    This summary is machine-generated.

    Hemithorax compression alters nasal airflow, reducing patency on the same side and increasing it on the opposite. This suggests autonomic nerve involvement in nasal congestion changes.

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    Area of Science:

    • Physiology
    • Otorhinolaryngology
    • Autonomic Nervous System

    Background:

    • Nasal airflow dynamics are crucial for respiratory function.
    • The influence of thoracic pressure on nasal patency is not fully understood.
    • Autonomic nervous system regulation of nasal mucosa is complex.

    Purpose of the Study:

    • To investigate the effect of hemithorax compression on nasal airflow.
    • To explore the relationship between thoracic pressure and nasal patency.
    • To assess potential autonomic nervous system mediation in these changes.

    Main Methods:

    • Simultaneous measurement of nasal flow rate in both nostrils during expiration using flowmeters.
    • Testing in 10 healthy subjects in various postures.
    • Evaluation in two patients with neurological conditions (Horner's syndrome, facial palsy).

    Main Results:

    • Compression of the hemithorax reduced ipsilateral nostril patency but increased contralateral patency.
    • In Horner's syndrome, the affected nostril remained blocked despite contralateral compression.
    • In facial palsy, the affected nostril remained patent despite ipsilateral compression.

    Conclusions:

    • Hemithorax compression significantly impacts nasal airflow dynamics.
    • Findings suggest a role for autonomic nerves in mediating nasal mucosal congestion changes.
    • The study highlights the intricate connection between thoracic mechanics and nasal patency.