Paranasal Sinuses
Paranasal Sinuses - Related Videos
08:46
Nose, Sinuses, Oral Cavity and Pharynx Exam
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2023
Source: Richard Glickman-Simon, MD, Assistant Professor, Department of Public Health and Community Medicine, Tufts University School of Medicine, MA This video provides an overview of sinus, nose, and throat examinations. The demonstration begins with a brief overview of the anatomy of the region. The upper third of the nose is bony, and the bottom two-thirds are cartilaginous. Air entering the nares passes through the nasal vestibules and into the narrow passageway between the nasal septum...
06:43
Quantitative Analysis and Characterization of Atherosclerotic Lesions in the Murine Aortic Sinus
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Cited by 51 •
2013
We describe procedures to quantify and characterize atherosclerotic lesions in mouse models using precision sectioning of the aortic sinus and ascending aorta combined with histochemical and immunohistochemical analysis.
07:34
Establishment of a Modified Ferric Chloride-Induced Superior Sagittal Sinus Thrombosis
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2025
This study presents a protocol for establishing a reproducible, minimally invasive rat model of superior sagittal sinus thrombosis induced by ferric chloride, utilizing a silk-suture method in combination with laser speckle contrast imaging and high-resolution ultrasound for evaluation.
08:44
Formation of Human Prostate Epithelium Using Tissue Recombination of Rodent Urogenital Sinus Mesenchyme and Human Stem Cells
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Cited by 10 •
2013
To unravel the earliest molecular mechanisms underlying prostate cancer initiation, novel and innovative human model systems and approaches are desperately needed. The potential of pre-prostatic urogenital sinus mesenchyme (UGSM) to induce pluripotent stem cell populations to form human prostate epithelium is a powerful experimental tool in prostate research.
01:16
ECG Interpretation of Arrhythmias I: Sinus Arrhythmias
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2025
Arrhythmias are disturbances in the heart's rhythm that lead to abnormal heartbeats. These irregularities can originate from different parts of the heart and are classified based on their origin and nature. Types of Arrhythmias Sinus Node Arrhythmias Sinus Bradycardia: Originating from the sinoatrial (SA) node, sinus bradycardia involves slower impulses, resulting in a heart rate of less than 60 beats per minute (bpm). Causes include sleep, vagal stimulation, beta-blockers, hypothyroidism, and...
FAQs
Coordinated ciliary movement provides the active clearance mechanism in the paranasal sinuses. Their mucosal lining produces mucus, and cilia transport those secretions through narrow drainage openings into the nasal passages. Together, these processes help preserve communication between the sinus spaces and nasal cavity while supporting ventilation and clearing mucus.
The drainage openings are clinically important because their narrow caliber makes the passageway central to ventilation and secretion transport. When a pathway becomes obstructed, mucus movement and ventilation can be disrupted, linking local structural abnormalities with mucosal disease. Assessing these openings therefore helps clinicians evaluate suspected sinusitis or other sinus disorders.
Ventilation and clearance are interdependent rather than separate functions. Mucus must be produced by the mucosa, then moved by cilia through the drainage openings so that secretions can reach the nasal passages. If anatomy or mucosal condition interferes with that sequence, clinicians may investigate obstruction, mucosal disease, or sinusitis as possible explanations for impaired sinus function.
Physical examination and computed tomography contribute complementary clinical information, although they do not provide identical assessments. Examination provides a direct clinical evaluation, while imaging can display sinus-related anatomy and abnormalities. Together, these approaches support assessment for sinusitis, mucosal disease, obstruction, and structural abnormalities, helping clinicians determine how findings should guide further management.
Evaluation becomes especially relevant when clinicians need to distinguish among sinusitis, mucosal disease, obstruction, and structural abnormalities. The decision to assess the paranasal sinuses is therefore tied to a diagnostic question rather than anatomy alone. Physical examination and computed tomography can characterize the suspected problem and provide information needed for subsequent medical or procedural planning.
Anatomical knowledge is essential when persistent or complicated disease requires more than routine medical assessment. Drainage pathways and structural relationships provide the framework for planning endoscopic procedures or surgery, while imaging can identify relevant abnormalities for surgical planning. In this context, sinus evaluation connects clinical findings with a targeted treatment approach and supports procedural decision-making.