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Related Concept Videos

Upper Respiratory Drugs: Decongestants01:27

Upper Respiratory Drugs: Decongestants

Decongestants are a class of medications used primarily to alleviate nasal congestion, a common symptom resulting from allergies, colds, sinusitis, and other upper respiratory tract infections. These drugs work by activating α-adrenergic receptors, constricting small blood vessels in the nasal membranes. This action results in the opening of clogged nasal passages, thereby facilitating sinus drainage and relieving congestion.
Most decongestants are readily available over-the-counter in various...
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...
Increased Intracranial Pressure l: Introduction01:14

Increased Intracranial Pressure l: Introduction

Intracranial hypertension is a sustained elevation of intracranial pressure (ICP) above 22 mm Hg. In supine adults, normal ICP is ~7–15 mm Hg.The rigid, nonexpandable cranium contains three components—brain tissue, blood, and cerebrospinal fluid (CSF)—that total ~1,700 mL in a typical adult: 1,400 mL brain (~80%), 150 mL blood (~10%), and 150 mL CSF (~10%). According to the Monro–Kellie doctrine, total intracranial volume is effectively fixed. When one component expands, CSF and venous blood...
Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...
Acute Pharyngitis01:30

Acute Pharyngitis

Introduction
Acute pharyngitis is the inflammation of the back of the throat (pharynx), commonly resulting in a sore throat. It is a frequently encountered condition that prompts individuals to seek medical advice.
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Acute pharyngitis can be categorized based on its underlying cause:
Drugs Used in Upper Respiratory Disorders: Overview01:16

Drugs Used in Upper Respiratory Disorders: Overview

Upper respiratory tract disorders, including viral infections and allergic rhinitis, cause significant discomfort and disrupt daily life. Managing these conditions involves a variety of drugs, such as antihistamines, intranasal steroids, decongestants, antitussives, expectorants, and mucolytics. Specific examples of drugs in each category are provided.
Antihistamines (e.g., Benadryl) block histamines from binding. Histamines are chemicals released during an allergic reaction in the body. As a...

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Related Experiment Video

Updated: Jun 22, 2026

3D-Neuronavigation In Vivo Through a Patient's Brain During a Spontaneous Migraine Headache
10:39

3D-Neuronavigation In Vivo Through a Patient's Brain During a Spontaneous Migraine Headache

Published on: June 2, 2014

Up front about frontal headaches and sinusitis.

M A Thornton1, C Brown

  • 1mthornton@rcsi.ie

Irish Medical Journal
|June 26, 2009
PubMed
Summary
This summary is machine-generated.

Frontal headaches are often misdiagnosed as rhinosinusitis due to over-reliance on CT scans. Accurate diagnosis requires considering a broader range of symptoms beyond facial pain and sinus imaging findings.

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Last Updated: Jun 22, 2026

3D-Neuronavigation In Vivo Through a Patient's Brain During a Spontaneous Migraine Headache
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Area of Science:

  • Otolaryngology
  • Neurology
  • Radiology

Background:

  • Frontal headaches are common but frequently misdiagnosed as rhinosinusitis.
  • Over-reliance on sinus CT imaging contributes to misdiagnosis of frontal headaches and facial pain.

Observation:

  • Reviewed 3 patients with frontal headaches misattributed to rhinosinusitis.
  • Patients presented with isolated frontal headaches, normal nasal exams, and abnormal sinus CT findings.
  • Medical therapy failed, and repeat CT imaging normalized in these cases.

Findings:

  • Facial pain/headache and sinus opacification on CT do not meet diagnostic criteria for acute or chronic rhinosinusitis.
  • Diagnosis of rhinosinusitis requires comprehensive evaluation of symptomatology, CT, and endoscopic findings.

Implications:

  • Incorrect diagnosis of rhinosinusitis can lead to unnecessary surgical interventions.
  • Repeat CT imaging and neurology consultation are crucial for accurate diagnosis in unclear cases.
  • Emphasizes the need for careful clinical correlation alongside imaging in diagnosing frontal headaches.