PHAR 721 Flashcards
Chronic Bronchitis occurs in patients with _________________? What time period defines chronic bronchitis?
COPD
Lasts longer than 3 months in each of 2 consecutive years
What is acute bronchitis?
A self-limiting cough that persists more than 5 days. Involves bronchi inflammation and is usually viral.
Also one of the most common reasons for a primary care visit (14 million cases annually)
What are the 2 causes of acute bronchitis, with examples from each?
Viruses (over 90 percent)
>influenza A and B
>parainfluenza
>rhinovirus
Bacterial
>Chlamydia pneumonia
Signs/symptoms of Acute Bronchitis
Cough (productive, persists more than 5 days and lasts 1-3 weeks)
Associated with prior upper respiratory infection, so make sure to get full PMI.
Wheezing, of Bronchi.
What signs/symptoms AREN’T typically associated with Acute Bronchitis?
Fever over 100, systemic symptoms, consolidation or crackles (aka rales)
How is acute bronchitis treated?
Symptoms are treated:
>cough suppressants at night (dextromethorphan)
>expectorants (Guaifenisen, although not much evidence)
>beta-2 agonists if wheezing (helps with bronchodilation)
>high-dose inhaled corticosteroids in emergency
Alternative therapies include echinacea for cold “prevention”, pelargonium and honey
How prevalent is the flu?
65.5/100,000 hospitalized in 2014-15 flu season, with highest rates occurring in those over 65. 141 pediatric deaths in same season.
How does flu present?
Influenza like illness (fever over 100, cough and/or sore throat without a known cause)
Describe the 2014-15 influenza virus
Influenza A: 83.5% (99.6% H3N2, 0.29% H1N1)
Influenza B: 16.5%
How many influenza viruses does the CDC characterize?
355 influenza viruses, characterized antigenically or genetically
High Risk Groups for Flu
Those over 65 or under 5, pregnant women, those with medical conditions (asthma, diabetes, heart disease, stroke, HIV or AIDS, cancer)
How the flu is spread and how long it lasts
Large particle respiratory droplets can fly 1-2 meters and contaminate surfaces (hard, non-poris with high humidity are the most habitable for virus).
Viral shedding occurs 1 day before symptoms and can last from 5 to 10 days after symptoms onset.
Incubation is 1-4 days, with 2 being the average.
Duration is typically 3-7 days, although cough and malaise may persist for 2 weeks.
What are the flu FACTS?
Fever, Aches, Chills, Tiredness, Sudden Onset
Flu Symptoms
Fever, nonproductive cough, myalgia, malaise (ill feeling), headache, sore throat, rhinitis is possible
Describe the different methods of flu diagnosis
Rapid influenza diagnostic test (takes less than 30 minutes, is 90% specific and 50-70% sensitive)
Viral cell culture (takes anywhere from 1 to 10 days)
Immunofluorescence (antibody stain) (takes 1-4 hours)
RT-PCR (1-6 hours)
What do we primarily use for flu diagnosis? What’s the downside?
Nasopharygeal swab
Unpleasant and false-positive
Flu complications
Pneumonia, bronchitis, sinus infection, ear infections, worsening of chronic conditions
Flu treatment options
Neuraminidase inhibitors (start within 48 hours)
What are 3 of the common neuraminidase inhibitors used?
Oseltamivir (Tamiflu) - 75 mg po bid for 5 days
Zanamivir (Relenza) - 10mg inhaled bid for 5 days
Peramivir (Rapivab) - 600mg IV as a single dose
Flu Prevention
Seasonal vaccine is best.
Other measures: >avoid ill people >frequently wash hands >avoid touching eyes, nose and mouth >cover nose and mouth when sneezing or coughing
Types of pneumonia (based on how illness is acquired)
Hospital acquired (HAP) - highly resistant Community acquired (CAP) Nonhospitalized patient with extensive healthcare contact (HCAP)
Describe CAP (Community acquired) Risk Factors
Chronic lung disease, cigarette smoking, dementia, stroke or brain injury, immune deficiency, heart disease, diabetes or cirrhosis, recent surgery
Symptoms and Signs of CAP
Cough (rust colored, mucopurulent), fever, chills, dyspnea, lung exam yields crackles or consolidation.
Others include chest pain, malaise, headache, confusion
Define crackles or consolidation (at they pertain to the lungs)
Crackles are a result of fluid in the lungs
Consolidation is result of large fluid presence preventing air movement
What 2 systems are used for CAP prognosis?
Pneumonia Severity Index (PSI) - predictive tool
CURB-65 (1 point given for each component)
>confusion
>urea (blood urea nitrogen above 7mmol/L)
>respiratory rate over 30
>BP (systolic under 90 and diastolic under 60)
>over 65 years of age
What do the results of a CURB-65 mean?
0-1 outpatient; 2 hospital; 3 or greater ICU
CAP causes
Bacteria are most common (streptococcus, mycoplasma and chlamydia [pneumoniae])
Viruses can include influenza, parainfluenza, respiratory syncytial virus
CAP treatment
Antibiotics for 5 days (macrolides common; fluoroquinolones and beta lactam/macrolide combos for those with comorbidities)
CAP Prevention
Vaccinations for at risk groups:
>those at or over 65 yo (PCV13 and PPSV23)
>Children under 5 receive PCV7 as routine vaccines
>those high risk from 6-64
What is the peak month for CAP
FEB
How likely is fever with acute bronchitis, flu and pneumonia?
Unlikely
Yes
Likely
How likely is cough with acute bronchitis, flu and pneumonia?
More than 5 days and mucopurulent
Common
Mucopurulent or rust colored
How likely are other symptoms with acute bronchitis, flu and pneumonia?
Uncommon
Myalgia, malaise
Chills, dyspnea
Typical cause of acute bronchitis, flu and pneumonia?
often viral
viral
often bacterial
Prevention of acute bronchitis, flu and pneumonia?
Hygiene
Vaccine/hygiene
Vaccine
Treatment of acute bronchitis, flu and pneumonia?
Symptomatic based
Antivirals/symptomatic
Antibiotics
Define asthma
A chronic inflammatory condition of the lungs that results in bronchoconstriction, excess mucus production, periodic symptoms of shortness of breath
Asthma prevalence
7.3% of population (1 in 13 Americans), 3,630 deaths per year in US, most common chronic disease of children (around 50 percent markedly improve or are symptom free as adults)
Describe child onset for asthma
More likely to be allergic based
Possible genetic predisposition to IgE mediated response to aeroallergens
Describe adult onset for asthma
More often non-allergic
Often negative family history and negative skin tests to common allergies
Possibly due to environmental exposure
Possible causes of asthma
Genetic factors (although no single genetic abnormality known causes asthma)
Environmental (hygiene, tobacco, sibling/daycare effect)
Asthma symptoms and triggers
Symptoms - coughing, wheezing, chest tightness, shortness of breath
Triggers - allergens, irritants, medicine, sulfites in foods and drinks, upper respiratory infections, physical activity, emotions
Anticholinergics target ____________
cGMP
Beta-agonists target ________
cAMP
Leukotrienes target ___________________
The leukotrienes that results from the lypoxygenase pathway
Leukotrienes are potent _________________
broncho-constrictors
Symptoms, short-acting beta agonist use and night time awakenings due to dyspnea with intermittent asthma
less than or equal to 2 days
less than or equal to 2 days
less than or equal to 2 days/month
Symptoms, short-acting beta agonist use and night time awakenings due to dyspnea with mild-persistent asthma
over 2 days a week
over 2 days a week
3-4 time a month
Symptoms, short-acting beta agonist use and night time awakenings due to dyspnea with moderate-persistent asthma
daily
daily
1-3 time weekly
Symptoms, short-acting beta agonist use and night time awakenings due to dyspnea with sever-persistent asthma
throughout day
several times per day
over 4 times a week
Objective asthma information can be obtained using these 3 methods
Peak flow meter (helps create asthma action plan), spirometry (lung volume, FEV1/FVC ratio, response to bronchodilation after albuterol administration) and lung sounds
Pharmaceutical options for Asthma
Rescue drugs:
Short acting beta adrenergic agonists (SABA)
Inhaled anticholinergics
Controller drugs:
Inhaled corticosteroids
Non-steroid controllers (mast cell stabilizers, leukotriene modifiers)
Therapy relievers or controllers:
Long-acting bronchodilators aka inhaled beta agonists (salmeterol, formoterol) - typically combined with inhaled corticosteroid
Additional therapy options include phosphodiesterase inhibitors, theophylline, allergy desensitization drugs
How to decide to “step-up” or “step-down” in asthma step treatment
step up if needed (first check adherence, environmental control and comorbid conditions)
Step down if possible (and asthma is well controlled for AT LEAST 3 months)
Step 6 for Asthma Therapy
High-dose ICS + LABA and oral corticosteroid
Consider omalizumab for patients with allergies
Step 5 for Asthma Therapy
High dose ICS + LABA
Consider omalizumab for those with allergies
Step 4 for Asthma Therapy
Medium dose ICS + LABA (LTRA, Theophylline or Zileuton would be good alternatives for LABA)
Step 3 for Asthma Therapy
Low dose ICS + LABA or Medium dose ICS
Step 2 Asthma Therapy
Low dose ICS (Cromolyn, LTRA, Nedocomil or Theophylline are fine alternatives)
Step 1 Asthma Therapy
SABA PRN
Risk factors for death from asthma
Hospitalizations (2 or more for asthma in past year, 3 or more ED visits for asthma in past year, hospitalization or ER visit for asthma in past month)
Using over 2 canisters of SABA in 1 month
Difficulty perceiving asthma symptoms or severity
Lack of asthma plan, sensitive to alternate medications
How to manage exercise-induced asthma
SABA (prevention in more than 80% of patients)
LABA, LTRA and cromolyn or nedocromil
Define COPD
A commonly preventable and somewhat treatable disease characterized by persistent airflow limitation and obstruction, usually progressive and associated with enhanced chronic inflammatory responses in the airways and lungs to noxious particles or gases.
Risk factors for COPD
smoking is number 1 risk factor.
Exposure to particles, gender and age, genes (antitrypsin-1-deficiency), and chronic asthma and reoccurring upper respiratory tract infections
Emphysema characteristics
“PINK PUFFER”
Alveolar problem, increase CO2 retention, minimal cyanosis, pursed-lip breathin, dyspnea, increased respiratory rate, hyperresonance on chest percussion, orthopneic, barrel chest, exertional dyspnea, prolonged expiratory time, speaks in short jerky sentences, anxious, use of accessory muscles to breath, thin
Chronic Bronchitis Characteristics
“BLUE BLOATERS”
Color dusky to cyanotic, recurrent cough with sputum production, hypoxia, hypercapnia, acidosis, edematous, increased respiratory rate, exertional dyspnea, increase incidence in heavy smokers, digital clubbing, cardiac enlargement, use of accessory muscles to breath
Goals of COPD treatment
Subjective - get patient to feel good since you can’t reverse disease
Objective: FEV1/FVC, mMRC, CAT; history of exacerbation or previous hospitalizations, lung sounds
Pharmacological principles and COPD
Medications may reduce or eliminate symptoms, increase exercise capacity, reduce exacerbation and improve quality of life (don’t really change lung volume though)
Current medications don’t slow or stop long term decline in lung function or prolong survival
Bronchodilation is primary approach
Once therapy added, it is rarely stopped
Low Risk, Less Symptoms Assessment Values of COPD
Spirometric Classification (GOLD 1-2)
Exacerbations per year (1 or less)
CAT (under 10)
mMRC (0-1)
Low risk, more symptoms Assessment Values of COPD
Spirometric Classification (GOLD 1-2)
Exacerbations per year (1 or less)
CAT (10 or more)
mMRC (2 or more)