asthma Flashcards
asthma
Can be defined as a chronic inflammatory disorder characterized by increased responsiveness of the bronchi to various innocuous stimuli, manifested by widespread and variable airway narrowing that varies in severity
asthma signs
Patients have episodes of cough,
wheezing, chest tightness and or
dyspnoea, which are often worse at night
or early in the morning
major characteristics of asthma
Narrowing of the airways
hypersecretion of mucus
recruitment of inflammatory cells
Non-specific airway hyper-responsiveness
Narrowing of the airways
Narrowing of the airways and impeded
airflow, commonly reversible
spontaneously or following treatment
hypersecretion of mucus
hypersecretion of mucus, which
can lead to blockage of airways with mucus
plugscan limit airflow
recruitment of inflammatory cells
(eosinophils, mast cells, neutrophils, T
lymphocytes) to the airways
Non-specific airway hyper-responsiveness
to a range of normally innocuous stimuli
including cold, irritants and pollutants
Asthma and allergies
are closely linked. Asthma is more common in families with
allergies or asthma, but not everyone with asthma has allergies.
Classification of asthma
extrinsic
inric
•Extrinsic
– identifiable external cause. Commonly occurs as a result of allergic response with development of IgE antibodies to specific antigens. Tends to start in childhood.
•Intrinsic
no external cause can be
identified. Generally appears in
adults.
examples of extrinsic
excerise pets stress anger pollution pollen smoke dust
Asthma: Diagnosis
Accurate patient history Patient assessment •Spirometry to assess for the presence of airflow obstruction •Serial peak expiratory flow
DRUG THERAPY
Short acting b2 agonist (SABA) Salbutamol Long acting b2 agonist (LABA) Salmeterol Inhaled Corticosteroids (ICS) Fluticasone Mast cell stabilizers (cromone) Sodium cromoglycate
Nursing Management asthma
Assessment of respiratory function and detailed history (if patient not in
acute distress)
Care priorities
Education/patient teaching
• Asthma action plan
• Drug therapy and correct use of inhalers
• Peak flow meter