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Asthma characterized by

Inflammation,mucosal secretions ,increased secretions

Extrinsic asthma


Intrinsic asthma

Asthma diagnosed when NO extrinsic factor can be identified. Result of factors such as emotional stress, exercise or fatigue.

Extrinsic releases

Mast cells that releAse chemical mediators such as eosinophils, leukotrinesbhistamines

The chemical mediators cause

Smooth muscle constriction brnchospasm dilation of blood vessels and tissue swelling AKA edema

Late response

Has longer duration but starts later

Age group most intrinsic pt

40 plus

Intrinsic brought n by

Infection,exercise cold air occupation exposure drugs

Manifestations of asthma

Increase RR,hr,BP,cardiac output insp and exp accessory muscle se ,increase AP diameter, intcostal retractions cough sputum


Decreased tactile and vocal fremitus, hyperresonnance

Chest xray signs

Flat diaphragms increased intercostal spacebradiolucency

Severe persistent asthma treated with

Corticosteroids and long acting B2 adrenergics

Rescue inhalers are


Status asthmatics may get treated with

Mechanical ventilation because ot dosent respond to meds

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