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Epistaxis01:30

Epistaxis

Epistaxis, or nosebleeds, occurs when small, swollen blood vessels in the nasal mucous membrane rupture. Typically, the anterior septum is the primary site of occurrence.
Etiology
Possible causes of this condition include high blood pressure, trauma, low humidity, upper respiratory tract infections, allergies, foreign bodies, nasal inhalation of corticosteroids or illicit drugs, excessive use of decongestant nasal sprays, facial or nasal surgery, anatomic malformation, tumors, or systemic...
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...
Anatomy of Respiratory System I: Upper Respiratory Tract01:29

Anatomy of Respiratory System I: Upper Respiratory Tract

The upper respiratory tract plays a vital role in the respiratory system, comprising several structures that facilitate air intake and prepare air for the lungs. It also serves as the first line of defense against pathogens and particles. This tract includes the nose and nasal cavity, the oral cavity, the paranasal sinuses, and the pharynx, each with specific functions and features.
Nose and nasal cavity
The nose and nasal cavity represent the main external openings of the respiratory tract.
Single Nucleotide Polymorphisms-SNPs01:05

Single Nucleotide Polymorphisms-SNPs

A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
Suctioning the Nasopharyngeal Airway01:29

Suctioning the Nasopharyngeal Airway

Nasopharyngeal suctioning is a procedure to remove secretions from the upper part of the respiratory tract that the patient cannot clear independently. It helps maintain airway patency and prevents complications such as aspiration pneumonia.
Equipment Required

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Related Experiment Video

Updated: Jun 20, 2026

Nasal Brushing Sampling and Processing Using Digital High Speed Ciliary Videomicroscopy – Adaptation for the COVID-19 Pandemic
09:03

Nasal Brushing Sampling and Processing Using Digital High Speed Ciliary Videomicroscopy – Adaptation for the COVID-19 Pandemic

Published on: November 7, 2020

Nasal polyps: an update.

Gerald McGarry1, Louise Melia

  • 1Glasgow Royal Infirmary, Glasgow.

British Journal of Hospital Medicine (London, England : 2005)
|September 15, 2009
PubMed
Summary
This summary is machine-generated.

Nasal polyps are a chronic condition causing recurrent symptoms despite treatment, often necessitating long-term medication and surgery due to unknown causes. Further research is needed to understand and manage this persistent respiratory issue.

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Culture and Imaging of Human Nasal Epithelial Organoids
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Culture and Imaging of Human Nasal Epithelial Organoids

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Last Updated: Jun 20, 2026

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Culture and Imaging of Human Nasal Epithelial Organoids
13:20

Culture and Imaging of Human Nasal Epithelial Organoids

Published on: December 17, 2021

Area of Science:

  • Otolaryngology
  • Respiratory Medicine

Background:

  • Nasal polyps present a significant clinical challenge due to their chronic, relapsing nature.
  • Current treatments offer symptomatic relief but do not resolve the underlying pathology.
  • The etiology of nasal polyps remains largely unknown, hindering definitive therapeutic strategies.

Purpose of the Study:

  • To explore the unknown causes of nasal polyps.
  • To identify potential targets for improved therapeutic interventions.

Main Methods:

  • This study reviews existing literature on nasal polyp pathogenesis.
  • Epidemiological data and clinical observations are analyzed.

Main Results:

  • The recurrent and remitting course of nasal polyps is confirmed.
  • The unknown etiology is highlighted as a critical knowledge gap.

Conclusions:

  • Nasal polyps represent a complex condition requiring long-term management.
  • Understanding the unknown causes of nasal polyps is crucial for developing novel treatments.