Bronchodilators
Albuterol (Proventil)
short-acting beta 2 agonist (SABA) : rapid but short-term relief; causes bronchodilation by relaxing bronchiolar smooth muscles .
Inhaler
Albuterol : use
primary - fast acting rescue drug to be used either during an asthma attack or just before engaging in activity that usually triggers an attack
Albuterol: nursing interventions
Anti-Inflammatory Agents
Fluticasone (Flovent)
inhaled corticosteroid; disrupts all known production pathways of inflammatory mediators.
MDI or DPI inhalers
Flovent : use
The main purpose is to prevent an asthma attack caused by inflammation or allergies.
Flovent: nursing interventions
Prednisone ( Deltasone)
oral corticosteroid; not recommended unless asthma symptoms cannot be controlled with any other therapy; rescue drug .
Prednisone side effects:
Prednisone: nursing interventions
Ipratropium (Atrovent)
cholinergic antagonist : both rescue and prevent asthma; used in place of SABA by patients who cannot tolerate side effects of beta 2 agonists: tachycardia, nausea, nervousness.
Mouth dryness - drink 4 L of fluid daily
Asthma and exercise
regular exercise (aerobic ) recommended: assist in maintaining cardiac health, enhancing skeletal muscle strength and promoting ventilation and perfusion.
Asthma and oxygen therapy
delivered by mask, NC, or endotracheal tube;
Heliox ( 50 % helium + 50 % of oxygen) can help improve oxygen delivery to the alveoli.
Status Asthmaticus
severe, life-threatening acute episode of airway obstruction that intensifies once it begins.
S/S: extremely labored breathing and wheezing - if not reversed - pneumothorax and cardiac or respiratory arrest !!!
TX: IV fluids, systemic bronchodilators, steroids ( decrease inflammation), epinephrine, oxygen.
Asthma S/s:
FVC
forced vital capacity : volume of air exhaled from full inhalation to full exhalation.
FEV1
forced expiratory volume in the first second
PEF
peak expiratory flow : fastest airflow rate reached at any time during exhalation
Asthma - inflammation
obstructs lumen (inside) ;can be caused by allergens attaching to antibodies which are
attached to mast cells and basophils (WBC)
-can also be cause by general inflammatory triggers not related to allergic responses.
Inflammation triggers:
cold air dry air fine airborne particles microorganisms aspirin (increase in leukotrienes)
Asthma - airway hyperresponsiveness
twitchy airways; obstructs airways ( outside) constricting bronchial muscles
Airway hyperresponsiveness triggers
exercise
upper respiratory illness
inflammation
unknown
Asthma labs: