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Pharm - LRI
Lower respiratory tract infections
126
Pharmacology
Graduate
03/05/2010

Additional Pharmacology Flashcards

 


 

Cards

Term
What are the 3 kinds of bronchitis?
Definition
Acute, Chronic, and bronchiolitis
Term
T/F
Bronchitis is generally considered a viral etiology.
Definition
True
Term
T/F
Pneumonia is generally considered a bacterial infection.
Definition
True
Term
Name 3 Lower resp. tract infections other than bronchitis and pneumonia.
Definition
SARS, ARDS, H1N1
Term
What is the clinical presentation of acute bronchitis?
Definition
cough, sore throat, malaise, headache, coryza, and fever less than 39 (102.2)
Term
What might the physical findings be in a patient with acute bronchitis?
Definition
ronchi and coarse, moist bilateral rales; CXR is normal with no infiltrates and no exudates
Term
When should a diagnosis of acute bronchitis be made?
Definition
When there is no clinical or radiological evidence of pneumonia and acute asthma or an exacerbation of COPD has been ruled out
Term
How long does acute bronchitis last?
Definition
< 3 weeks
Term
T/F
There is no role for inhaled bronchodilator therapy in acute bronchitis.
Definition
True
Term
How do you diagnose whooping cough?
Definition
nature of the cough and immunization record
Term
What is the treatment for whooping cough?
Definition
Erythromycin (EES) 30-50 mg/kg/day as 3 divided doses x 10 days
Term
How soon should treatment be started with whooping cough?
Definition
macrolide should be started within the first 2 weeks
Term
How long should a patient with whooping cough be isolated?
Definition
first 5 days of treatment
Term
Name 3 primary bacterial agents that can cause acute bronchitis in rare cases.
Definition
Mycoplasma pneumoniae, Chlamydia pneumoniae, Bordetella pertussis
Term
Name 3 causes of secondary bacterial infection in acute bronchitis.
Definition
Streptococcus ssp., Staphylococcus spp., Hemophilis spp.
Term
T/F
Dyspnea, cyanosis, and severe airway obstruction are typical of bronchitis.
Definition
False
Term
When are cultures used to diagnose acute bronchitis?
Definition
they are only used for diagnosis in prolonged or severe cases because bacterial etiology is more likely at that point
Term
What is the treatment for acute bronchitis?
Definition
symptomatic and supportive care - fluids and bed rest, antipyretics, vaporizer to lessen respiratory secretions (especially in infants < 1 year)
Term
Where is acetominophen metabolized?
Definition
liver
Term
Where is ibuprofen metabolized?
Definition
kidneys
Term
What effects does acetominophen have?
Definition
antipyretic and analgesic
NO anti-inflammatory effects
Term
What is the maximum dosage of acetominophen for an adult?
Definition
short term 4g/day
long term 3g/day
Term
How do you dose ibuprofen and acetominophen together?
Definition
Take 1 every 3 hours, alternating.
Term
Why is aspirin not often recommended?
Definition
GI effects
Term
What is Reye's syndrome?
Definition
a rare, potentially fatal childhood disease
Term
Why is aspirin not used in children?
Definition
studies have found a link between the use of aspirin during a viral illness and Reye's syndrome
Term
What characterizes Reye's syndrome?
Definition
severe increase of intracranial pressure and an abnormal accumulation of fat in the liver; first symptom is uncontrollable vomiting and nausea; swelling in the brain may cause seizures and the child may stop breathing
Term
How do you treat Reye's syndrome?
Definition
drugs to control the swelling in the brain and IV fluids to restore normal blood chemistry; ventilator to aid in breathing
Term
What % of cases of Reye's syndrome used to be fatal?
Definition
60%
Term
Name 3 cough suppressants used to treat acute bronchitis.
Definition
dextromethorphan, codeine, and hydrocodone
Term
How does dextromethophan work?
Definition
Penetrates the CNS to act on the brainstem to inhibit the cough center; inhibits glutamenergic synaptic transmission of inputs from sensory receptors in the airway as a result of facilitation of serotonergic mechanism
Term
T/F
Expectorants are recommended for acute bronchitis.
Definition
False - not necessarily
Term
What is guafenesin?
Definition
an expectorant
Term
What do expectorants do to ease symptoms?
Definition
promote drainage of mucus from the lungs by thinning the mucus and lubricating the irritated respiratory tract
Term
What is the dosing for guafenesin (Mucinex)?
Definition
1200 mg PO q12 hour
Term
How might you avoid prescribing an antibiotic for acute bronchitis without making the patient uncomfortable?
Definition
dx of chest cold instead of acute bronchitis
Term
T/F
When a medication has dextromethorphan added it says DM.
Definition
True
Term
What is benzonatate (Tessalon)?
Definition
an antitussive
Term
How do you dose benzonatate?
Definition
100 mg perles bid-tid
Walmart $4 prescription
Term
Why is antiviral therapy not typically used for acute bronchitis?
Definition
because of the inability of clinical trials to prove the efficacy of these meds for acute bronchitis
Term
What criteria are used to diagnose chronic bronchitis?
Definition
cough and sputum expectoration occurring on most days for at least 3 months of the year and for at least 2 consecutive years without the presence of other pulmonary or cardiac causes
Term
What is usually in the history of chronic bronchitis?
Definition
history of smoke or chemical exposure - respiratory irritants
Term
How many COPD patients are there in the US?
Definition
16 million
Term
What 2 diseases make up COPD?
Definition
chronic bronchitis and emphysema
Term
What are the 3 subgroup classifications of chronic bronchitis?
Definition
1. simple chronic bronchitis with no evidence of COPD on pulm. function testing
2. chronic bronchitis with COPD FEV1 > 50%
3. chronic bronchitis with COPD FEV1 < 50%
Term
T/F
If you have chronic bronchitis, you have COPD.
Definition
False
Term
How do we treat chronic bronchitis?
Definition
depends on classification 1, 2, or 3
symptomatic and supportive care, maybe antibiotics
Term
What 3 things can help us classify chronic bronchitis?
Definition
obesity - based on BMI
clubbing of the digits
CXR - barrel chest, depressed diaphragm
Term
What might the clinical presentation be for a patient with chronic bronchitis?
Definition
cough - rhonchi, rales, wheezing
decreased breath sounds
mild fever (< 39 or 102.2)
sore throat, malaise, headache
Term
What are the 2 main treatment goals for chronic bronchitis?
Definition
1. reduce the severity of chronic symptoms
2. decrease the number of acute exacerbations
Term
How can we reduce the severity of chronic bronchitis?
Definition
stop smoking
avoidance of bronchial irritants
pulmonary therapy program (exercise, breathing techniques, postural draining techniques)
Term
Name 2 bronchodilators.
Definition
albuterol and pirbuterol
Term
How do you dose bronchodilators?
Definition
2 puffs prn up to QID - if more than 1 is used, still QID TOTAL
Term
How do you treat acute exacerbations of chronic bronchitis?
Definition
bronchodilators or use an updraft machine
Term
How do you dose duoneb (albuterol + ipratripium) updraft solution?
Definition
QID
Term
What medications are used with an updraft machine?
Definition
albuterol inhalation solution, ipratropium bromide, duoneb (both together), levabuterol
Term
T/F
Abuterol is a short acting beta agonist.
Definition
True
Term
T/F
While using beta agonists, it is important to avoid concomitant beta-blocker therapy.
Definition
True
Term
Why does albuterol have little effect on adrenergic receptors of the heart?
Definition
It is a selective better blocker, blocking beta2 receptors which relaxes the airway smooth muscle but not blocking beta1 receptors of the heart
Term
What is a leading indicator of mortaity in asthma patients and indicates further evaluation in COPD patients?
Definition
the use of more than one inhaler per month of albuterol
Term
How does ipratropium bromide act as a bronchodilator?
Definition
it blocks the action of Ach at parasympathetic sites in bronchial smooth muscle
Term
What is the DOC bronchodilator for COPD patients? How is it dosed?
Definition
albuterol + ipratropium bromide
2 puffs prn QID
Term
What is antibiotic therapy for acute exacerbations of chronic bronchitis based on?
Definition
subgroup classification and severity of symptoms
Term
What is the antibiotic therapy for simple chronic bronchitis with mild symptoms?
Definition
no antibiotics, just symptomatic and supportive care
Term
What is the antibiotic therapy for simple chronic bronchitis with intense symptoms? Give dosage
Definition
symptomatic and supportive care and antibiotics
azithromycin, 3 pack 500 mg po QD x 3 days
doxycycline
trimethoprim/sulfamethoxazole 800/160 mg po bid x 10 days
Term
How does trimethoprim/sulfamethoxazole work?
Definition
prevents bacterial proteins and nucleic acids from being synthesized
Term
What is the antibiotic therapy for chronic bronchitis with COPD and mild symptoms?
Definition
azithromycin, doxycycline, co-trimaxazole (bactrim DS)
Term
What is the antibiotic therapy for chronic bronchitis with COPD and severe symptoms?
Definition
levofloxacin, 750 mg QD x 7 days
clarithromycin 500 mg ii tabs QD x 7 days
Term
What is the antibiotic therapy for chronic bronchitis with severe COPD and mild symptoms?
Definition
levofloxacin
amoxicillin-clavulanate 1000/62.5 mg 2 tabs po q12h x 10 days
Term
What is the antibiotic therapy for chronic bronchitis with severe COPD and severe symptoms?
Definition
consider hospitalization for IV abx as for pneumonia - run cultures
ceftriaxone 1 g IM with levofloxacin or Augmentin and follow up in 24 h.
Term
What % of patients will have resolution of their cough after smoking cessation?
Definition
90%
Term
Is long-term antibiotic prophylaxis indicated for chronic bronchitis?
Definition
No.
Term
What is bronchiolitis?
Definition
acute viral infection of the lower respiratory tract affecting infants
Term
What age is the peak incidence of bronchioloitis?
Definition
2-10 months
Term
T/F
Bronchiolitis is unusual after age 2.
Definition
True
Term
What time of year do most cases of bronchiolitis occur?
Definition
winter and continues into spring
Term
T/F
Viral bronchiolitis can be life threatening.
Definition
True
Term
How many deaths occur from bronchiolitis n the US each year?
Definition
500
Term
What 3 viruses account for most cases of bronchiolitis?
Definition
RSV, hMPV, and PIVs
Term
What % of cases of bronchiolitis are caused by RSV?
Definition
80%
Term
What % of bronchiolitis cases are caused by human metapneumovirus?
Definition
4-7%
Term
What % of bronchiolitis cases are caused by parainfluenza viruses?
Definition
7-10%
(includes adenoviruses, influenza, rhinovirus, enterovirus, and herpes simplex)
Term
What % of children between 6-12 months have antibodies to hMPV?
Definition
25%
Term
At what age do 100% of patients show evidence of past infection with hMPV?
Definition
age 10
Term
What is the clinical presentation of bronchiolitis?
Definition
prodrome - irritability, restlessness, mild fever (lasts 2-7 days)
dehydration - cough prevents fluid intake; emesis, diarrhea, fever
tachypnea (40- 80 RR)
labored breathing, retractions of the chest wall, nasal flaring, and grunting
Term
T/F
Cyanosis is unusual in bronchiolitis.
Definition
True
Term
T/F
Hypoxemia is uncommon with bronchiolitis.
Definition
False - it is common
Term
When is hypercarbia seen in bronchiolitis?
Definition
Only in the most severe cases
Term
When are bronchodilators used in the treatment of bronchiolitis and why?
Definition
only for bronchospasm with clear therapeutic benefit because they may be detrimental to patients
Term
T/F
Corticosteroids/leukotriene modifiers are not currently recommended in the treatment of bronchiolitis.
Definition
True - but they are used in 60% of patients
Term
T/F
Antibiotics should not be used for bronchiolitis.
Definition
True - unless coexistant bacterial infection is known to exist.
Term
What is the most important measure in preventing RSV infection?
Definition
hand washing - alcohol based rubs are preferred
Term
T/F
Breast-feeding reduces the risk of infection with RSV.
Definition
True
Term
What treatment regimen helps reduce rate of hospital admission in bronchiolitis patients?
Definition
epinephrine nebulizer treatment
dexamethasone shot then oral treatment for 5 days
Term
What is palivizumab?
Definition
a monoclonal antibody to RSV that has been shown to reduce the risk of severe infection in high risk patients - premies, infants with chronic lung disease, and infants with congenital heart defects
Term
How is palivizumab given?
Definition
injection once a month for several months (max 3-5 doses)
Term
What % of palvizumab is not human?
Definition
5% - murine (mouse)
Term
T/F
There have been resistant RSV strains isolated from clinical samples.
Definition
False
Term
What is the most common cause of death from infection in the US?
Definition
pneumonia
Term
How many pneumonia cases are there annually in the US?
Definition
4 million
Term
What are the 3 ways in which microorganisms access the lungs?
Definition
1. inhaled aerosolized particles
2. through the blood stream from an extrapulmonary site of infection in sepsis
3. aspiration of oropharyngeal contents
Term
T/F
Lung infection with viruses predisposes the lungs to infection.
Definition
True
Term
What is the clinical presentation of pneumonia?
Definition
abrupt onset of fever, chills, dyspnea
productive cough - rust-colored sputum or hemoptysis
pleuritic chest pain
tachypnea
tachycardia
PE: inspiratory crackles, diminished breath sounds over the area of infection, dullness to percussion, increased tactile fremitus
Term
What will show on the CXR of a patient with pneumonia?
Definition
dense infiltrate in 1 lobe or segment of the lung
Term
What will show on the lab studies of a patient with pneumonia?
Definition
Hypoxemia
CBC - leukocytosis with left shift
blood cultures usually negative
sputum cultures may show the pathogen
Term
What is the most common cause of CAP?
Definition
Streptococcus pneumoniaee
Term
Why is urinary antigen detection for the C polysaccharide from the pneumococcal cell wall used to determine if someone has Strep. pneumoniae?
Definition
because it remains positive for weeks after initial symptoms and can be used after abx are begun
Term
How do you determine if someone has severe CAP?
Definition
One major criteria or 2 minor criteria
Term
What are the major criteria for determining severe CAP?
Definition
serum p < 7.3
systolic pressure < 90 mm Hg
Term
What are the minor criteria for determining severe CAP?
Definition
respirations > 30
BUN > 30
altered mental status
age > 80 years
multi-lobular/bilateral infiltrates on CXR
Pa02 < 54 mm Hg
Term
What are 3 parts of supportive therapy upon hospitalization?
Definition
1. respiratory function - O2, ventilation
2. Circulatory collapse - rehydration, nutritional support
3. Control of fever
Term
What is the outpatient abx therapy for adults with CAP?
Definition
levofloxacin 750 mg QD x 10 days
gemifloxacin 320 mg po QD x 7 days
clarithromycin 500 mg ii tabs QD x 10 days
Term
What is the outpatient abx therapy for pediatrics with CAP?
Definition
clarithromycin
amoxicillin/clavulanate
ceftriaxone
Term
What is empyema and how is it treated?
Definition
pus in the pleural space and it should be drained with an image guided catheter
Term
When should you follow up with pneumonia patients?
Definition
24-72 hours
Term
What are the 2 pneumonia vaccines and when are they used?
Definition
Pneumovax 23 - used in those with weakened immune systems and those over 65
Prevnar - covers 80% of pneumococcal infections in peds population

Also, yearly flu vaccine helps prevent pneumonia cases caused by flu
Term
What are 3 atypical pathogens that may cause pneumonia?
Definition
Mycoplasma penumoniae, Chlamydia pneumoniae, and Legionella pneumoniae
Term
How is Legionella pneumoniae spread?
Definition
spray from stagnant water
no person to person spread
has 14% mortality rate
Term
What is the clinical presentation of atypical pneumoniae?
Definition
headache, sore throat, cough, low grade fever, and scant infiltrates on a CXR (diffuse alveolar pattern)
Term
How do you treat atypical pneumonia?
Definition
levofloxacin
clarithromycin 500 mg ii tabs QD x 10 days
doxycycline
Term
How should nursing home acquired pneumonia be treated outpatient?
Definition
levofloxacin or moxifloxicin

OR

amoxicillin/clavulanate or cefuroxime or cefpodoxime AND azithromycin
Term
How should nursing home acquired pneumonia be treated inpatient?
Definition
3 medications IV

1. antipseudomonal - cephalosporin (cefepime), cabapenem (imipemem/cilastatin), B-lactam (piperacillin-tazobactam)
2. antipsudomonal - fluoroquinolone (levofloxacin), aminoglycoside (tobramycin)
3. Anti-MRSA - vancomycin or linezolid
Term
What is SARS?
Definition
severe acute respiratory syndrome
caused by a coronavirus
Term
What is ARDS?
Definition
acute respiratory distress syndrome
Term
What is the prophylactic treatment for SARS?
Definition
hand washing with povidone-iodine products and isodine gargle
Term
T/F
No pharmacological treatment has proven effective against ARDS.
Definition
True
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