Pan sinusitis is the term used to indicate inflammation of all the paranasal sinuses</li></ul>drtbalu<br />
Acute sinusitis<br /><ul><li>Acute inflammation of mucosa lining paranasal sinuses of less than 4 weeks duration
Infection is said to be closed if the inflammatory exudate cannot escape from the sinus because of blocked ostium or viscous secretion
Infection is said to be open if the exudate escapes from the sinuses due to normal functioning mucociliary clearence mechanism</li></li></ul><li>Pathophysiology<br /><ul><li>Acute sinusitis is caused when the normal defence mechanisms like lysozymes and mucociliary clearance mechanism is breached due to viral infection.
After the defences are breached, secondary bacterial infection follows.</li></li></ul><li>Aetiology<br /><ul><li>Infections
Ear fullness / ear pain</li></li></ul><li>Clinical types<br /><ul><li>Acute catarrhal type – Earliest stage. There is oedema, mucous secretion, presence of leukocytes. There is no destruction of mucous membrane lining the sinuses.
Acute suppurative type – Inflammation is very severe. Large number of leukocytes seen. Pus could be seen accumulating due to suppuration. The mucous membrane may be necrotic and polypoidal</li></li></ul><li>Symptoms<br /><ul><li>General symptoms – Malaise, headache, mild fever, facial pain, sorethroat and periorbital oedema.
Local symptoms – Nasal block, loss of vocal resonance, reduction in sense of smell, nasal discharge, post nasal drip, cough, pain over sinus area</li></li></ul><li>Features of pain<br /><ul><li>Antral pain – Occurs along the infraorbital margins, and is referred to upper teeth
Ethmoidal pain – Over bridge of nose, and inner canthus of eye. May be referred to parietal eminence