Asthma Flashcards
in what resp disorder is there a change in volume of air the lung can hold?
restrictive disorders
what is obstructive resp disorders?
asthma & copd
- lead to a decrease in airflow
- *no change in volume of air the lungs can hold
when are most cases of asthma diagnosed?
<10 years of age
what is the definition of asthma?
a chronic inflammatory disorder
what are the symptoms of asthma?
non-specific
-cough (may/may not be productive)
what does the inflammation in asthma cause?
recurrent episodes of coughing (particularly at night or early in the morning), wheezing, breathlessness, and chest tightness
do asthma symptoms come and go and what are they dependent on?
symptoms come and go and are dependent on environment (i.e. cats)
-COPD sx’s are always there
patients with asthma symptoms need to be referred to what?
spirometry
what is the hallmark feature of asthma?
Airflow obstruction that is at least partially <b>reversible</b>
what does spirometry show in asthma? (what is FEV1?)
FEV1 of >200ml <b>and</b>
≥12% increase from baseline measure after SABA (e.g., albuterol)
what risk factors do people with have?
atopic conditions (i.e. eczema, allergic rhinitis, etc.)
IgE is the antibody
what are inhaled allergens?
-pollen, cockroaches, animal dander, dust mites, damp rooms (mold)
<b>IgE antibodies - specific to the type of allergen</b>
what are inhaled irritants?
-perfumes, tobacco smoke, cleaning agents, airborne chemicals, wood burning stoves
universal triggers NOT associated w/IgE
what are the preferred agents to use for inflammatory/immune response of asthma?
inhaled corticosteroids
what are the monoclonal antibody medications for asthma?
Xolair (omalizumab), Cinqair (reslizumab), Nucala (mepolizumab)
what is the mechanism of Cinquair (reslizumab) and Nucala (mepolizumab)?
block IL-5 and prevent the activation of eosinophils
what is the mechanism of Xolair (omalizumab)?
specifically binds to IgE and reduces serum IgE to <5% to what it was at baseline and prevents cascade from occurring
are the monoclonal antibodies first or last line meds for asthma?
LAST LINE
-for patients that are not responding to their inhaled corticosteroids, using bronchodilator frequently, having frequent flare ups and have allergic asthma worst of the worst patients
what is the indication for Xolair (omalizumab)?
- 6+ years
- mod-severe asthma not controlled on ICS
- skin test or perennial allergies (animal dander, cockroaches, indoor molds, dust mites)
what is the indication for Cinqair (reslizumab)?
18+ years w/severe asthma esoinophilic phenotype
what is the indication for Nucala (mepolizumab)?
12+ years severe asthma w/an eosinophilic phenotype
patients with asthma should be referred for what testing?
allergy testing
how do you reduce exposure to animal dander?
- Keep animal(s) out of the bedroom
- Seal (filter) air ducts leading to bedroom
- HEPA Filters
how do you reduce exposure to dust mites?
<b>-Reduce humidity to <50% - dust mites can’t survive if it’s too dry</b>
- Remove carpets if possible
- Wash bedding weekly (≥130oF)
- Encase mattress, pillow, and box springs in an allergen impermeable cover
how do you reduce exposure to cockroaches?
- Use poison bait or traps
- Do not leave food or garbage exposed
how do you reduce exposure to pollens & outdoor molds?
- Use air conditioning
- Stay indoors when pollen counts are high
how do you reduce exposure to indoor molds?
- Fix all water leaks
- Clean moldy surface
- Reduce humidity to <50%
what are common asthma triggers/exacerbating factors?
- GERD
- Rhinitis (use inhaled intranasal steroids)
- Exercise
- Sulfites
- Beta-blockers (including eye drops)
according to the EPR 3, if you have intermittent asthma, what txt do you need?
Intermittent asthma – not very symptomatic (have occasional issue and need albuterol; exercise induced asthma)
<b>-don’t need to use controller therapy (only use bronchodilators)</b>
according to the EPR 3, if you have persistent asthma, what txt MUST you use?
MUST use controller therapy (preferred therapy is inhaled corticosteroid)
what 2 domains are assessed when staging severity?
impairment & risk
what is the impairment domain when staging severity?
- Frequency & intensity of symptoms
- Functional limitations
- Effect on quality of life
what is the risk domain when staging severity?
- Future exacerbations
- Loss of pulmonary function
- Risk of adverse effects from medication
what are the 2 treatment goals of asthma?
- reduce impairment
- reduce risk
what is the rule of 2 for treatment of asthma?
<b>Factors that suggest asthma is not controlled:</b>
-Using SABA >2 days/week, or waking up >2x/month, or using >2 canisters of SABA/year
what txt goals are for reducing impairment of asthma?
- Prevent asthma symptoms
- Require infrequent use (<2 days a week) of inhaled SABA
- Maintain (near normal pulmonary function
- Maintain normal activity levels
- Meet the patient’s expectations with asthma care
what txt goals are for reducing risk of asthma?
- Prevent recurrent asthma exacerbations
- Prevent loss of lung function
- Provide optimal pharmacotherapy
what do peak flow meters measure?
- Measures how well lungs are able to expel air (Peak expiratory flow rate or PEFR – L/min)
- Not as sensitive as a spirometer, but pts can use it to measure their <i>lung fxn at home</i>
-pts set their personal best over 2-3 week period & record their highest value
what reading do pts record when using a peak flow meter?
their HIGHEST reading (not the avg.)
what the clinical utility of the peak flow meters?
- Early indicator for loss of control
- May help patients identify triggers
- Determine how well regimen is working
- May help indicate when to seek emergency care
after a personal best with the peak flow meter is established, what is the use?
- Use at least every morning upon awakening
- Use before taking any asthma medication
- May use after taking a rescue medication to determine impact
- Use as directed by PCP*** (i.e. action plan)
what are the 3 zones for asthma action plans?
80-100% of Personal Best = Green zone
50-80% of Personal Best = Yellow zone
<50% of Personal Best = Red zone
what does the green zone indicate?
80-100% of Personal Best
- Continue with regular activities
- Follow your maintenance medication plan (no changes)
what does the yellow zone indicate?
50-80% of Personal Best
- May require medication adjustment
- Contact health care provider
what does the red zone indicate?
<50% of Personal Best
-Emergency – Dial 911
Contact Health Care Provider -> <b>going to the hospital!!</b>
if peak flow reading increases 20% or more after using a SABA, what should you consider?
adjusting controller therapy
how frequently should you follow up for asthma?
- Every 2-6 weeks while gaining control
- Every 1-6 months once controlled
- At 3 month intervals if a reduction in therapy is anticipated
what do you assess at <u>every</u> follow-up visit for asthma?
-Asthma control
-Medication technique
-Asthma action plan
<b>-Medication adherence</b>
-Patient related concerns
what are the top 3 risk factors for death to refer a pt for?
- Prior severe exacerbation (Intubation or ICU Admission)
- 2+ Hospitalizations or 3+ ED visits past year
- > 2 canisters of SABA per month
when do you consider an asthma specialist?
-Hospitalized
-Difficulties achieving or maintaining control
(Step 4 care+ is required;
Step 3 care+ for kids 0-4 years)
-If immunotherapy is considered
-If additional testing is indicated
-If >2 oral steroid bursts in past year
what are the criteria for stepping down a pts therapy?
- Must be “well controlled” for at least 3 months
- Reduction should be gradual (i.e. decrease ICS by 25-50%)
- Must monitor closely (e.g. 2-6 weeks)
- Consider history of prior exacerbations
- Remember use the least amount of medication needed for control
what should you provide to all asthma patients?
asthma action plans
-Tells patient what to do if they are starting to lose control
what is in an asthma action plan?
- Daily management
- Controller medication
- Environmental control measures - Managing worsening asthma
- How to adjust medication
- When to see medical care
what are the 2 asthma medication regimens?
maintenance and rescue
what is the maintenance regimen for asthma?
<b>control inflammation to some extent</b>
- inhaled corticosteroids
- long acting B2-agonsts
- long acting anticholinergics
- leukotriene antagonists
- theophylline
what 2 medication categories in the asthma maintenance regimen, don’t target inflammation but are in combo products?
Long acting B2-agonists (help w/bronchodilation but not inflammation)
Long acting anticholinergics (help w/bronchodilation but not inflammation)
what is the rescue regimen for asthma?
<b>quick acting agents to get out of bronchoconstricted state</b>
-Short acting B2-agonists
-***Short acting anticholinergics
(NOT approved or recommended for rescue in asthma)
what do MDIs have that DPIs don’t have?
a propellant (HFA) that helps push medicine out
what are the advantages of MDIs?
- Less time (<1 min)
- Small/portable
- No drug preparation
- Mechanical ventilation
what are the disadvantages of MDIs?
<b>-Technique/timing essential</b>
- Freon effect (< w/HFA)
- Requires breath hold
- Oropharyngeal deposition
what are the advantages of DPIs?
-Less time (<1 min)
<b>-Less technique/timing</b>
-Small/portable
-Usually less money than MDI counterpart
what are the disadvantages of DPIs?
- Some dose preparation
- Requires breath hold
- Requires fast inhalation
- Oropharyngeal deposition
- No mechanical ventilation
what are the advantages of nebulizers?
- Minimal technique/timing
- No breath hold required
- Mechanical ventilation
what are the disadvantages of nebulizers?
- More expensive
- Drug preparation required
- Admin time (5-15min)
- Bulky and less portable
- Requires power source
- Must clean regularly
what is important when using an MDI?
how the pt holds it
-must hold in an “L” position (mouth piece down)
exhaling completely
breathing in deeply and slowly for 3-5 secs while depressing canister
who are valve holding chambers good for?
for pts w/problems coordinating and inhaling easier for patients
what do the valve holding chambers do?
Valves hold the medication in there, so gives you a little extra time to inhale
(vs spacers, just gives you space and doesn’t hold anything)
<b>valves are better</b>
are MDIs & DPIs compatible with valve holding chambers & spacers?
only MDIs are
if a kid uses a facemask, what should the parents make sure to do?
make sure kids wash around their mouth b/c it will lead to atrophy of skin around mouth
what is it about valve holding chambers (VHC)?
- Requires less coordination to use
- Improves drug deposition into lungs
- Decreases oropharyngeal deposition
- Consider a face mask in child < 4 years old
- Use one actuation per inhalation!!!!!
what should every patient with asthma have?
a SABA
what is quick relief medication for asthma?
a SABA
what is the mechanism for SABAs?
increases adenyl cyclase -> increases cAMP which activates PKA -> Ca++ leaves the cell -> smooth muscle relaxes
when do pts use SABAs?
-Acute symptoms and exacerbations
<b>-Treatment of choice for exercise induced asthma</b>
what medication is the treatment of choice for exercise induced asthma?
SABAs
what is recommended for cleaning of SABAs?
Weekly cleaning is recommended