331 test 3 Flashcards
what disease are considered obstructive lung diseases
Asthma, COPD, chronic bronchitis, and emphysema
upper respiratory infection symptom relief
expectorants, antitussives, nasal decongestants, and anti-histamines
upper respiratory infection symptoms
excessive mucus production and nasal congestion
Empiric therapy
based on symptoms practitioner is making an educated guess with their knowledge and experiences
when histamine attaches to H1 receptors
upper respiratory: Smooth muscle of airway Increased vasodilation Increased vascular permeability Constriction of the bronchioles in airway
histamine does what to parietal cells
directly stimulate parietal cells to increaseacidsecretion
when histamine attaches to H2 receptors
stomach (increases gastric secretions) and heart (increases HR)
histamine is a true
neurohormone
Pepsid targets
H2 receptors
histamine is released in response to
antigen exposure
what are found in the heart and known to release histamine
mast cells
excessive histamine release can lead to
anaphylaxis
histamine inflammatory responses
urticaria, angioedema, pruritus and fever
urticaria
hives
how does histamine produce both hives and agiokedema
dilating the small blood vessels in the skin causing fluid to leak
constant itching can be associated with
high temperatures
vasodilation and increased permeability =
increased body secretions and leads to hypotension and edema
anaphylactic shock
lung constriction, increased body secretions, vasodilation everywhere except in the bronchioles which constrict, increased capillary permeability
Palliative
relieving pain without dealing with the cause of the condition (treating symptoms)
Antiemeticdrugs are
types of chemicals that help ease symptoms of nausea or vomiting. – typically for motion sickness
contraindications of antihistamines
include narrow-angle glaucoma, cardiac disease, kidney disease, hypertension, bronchial asthma, chronic obstructive pulmonary disease, peptic ulcer disease, seizure disorders, benign prostatic hyperplasia, and pregnancy.
why do you want to give antihistamines as early as possible
as early as possible because it will not push already bound histamine off receptors. it competes for receptor sites
when are antihistamines indicated
allergies, vertigo (anti-emetic), insomnia, cough
what do antihistamines do
have anti-emetic effects - ease nausea, sedation, has anticholinergic effects of drying secretion, causes bronchodilator and prevents vasodilation
Diphenhydramine
Benadryl
where does diphenhydramine work
peripherally and centrally
what does diphenhydramine do
antihistamine, anticholinergic, sedative, and anti-emetic
anticholinergic
blocks the neurotransmitter acetylcholine (parasympathetic) in the central and the peripheral nervous system
why treat Parkinson’s with diphenhydramine
its anticholinergic effects help relax the patient
what can diphenhydramine do to older adults
cause hangover effect which puts them at risk for falls
decongestants
shrink engorged mucosa and constrict nasal arterioles
expectorants
decrease the viscosity (thickness) of sputum and increase cough and spit to overall decrease cough in the end
antitussives
cough suppressant
two types of antitussives
opioid (watch for respiratory depression) and non-opioid (might feel numbness in throat of mouth
three types of nasal decongestants
adrenergics (sympathomimetics), which are the largest group; anticholinergics (parasympatholytics), which are somewhat less commonly used; and selected topical corticosteroids (intranasal steroids)
example of decongestant
fluticasone (Flonase)
example of antitussive
codeine (opioid) and benzonatate (Tesselon)
example of expectorant
guaifenesin (mucinex)
different categories of pneumonia
- CAP - community-acquired pneumonia – out in the community anywhere
- HCAP - healthcare-associated pneumonia – pt has extensive interactions with healthcare community – constant contact with healthcare workers
- HAP - Hospital-acquired pneumonia – show signs within 48 hrs of admission into hospital
- VAP - Ventilator-associated pneumonia – pt in ICU who require ventilator support (happens in 9-27% of people on ventilators) – proper oral care of patients can decrease risk immensely
Bacteremia
presence of bacteria in blood
most common nosocomial infection
UTI
risk factors of pneumonia
Immunosuppression
Sedentary – especially in elderly and post op
Underlying chronic heart or lung disease
Atelectasis
complete or partial collapse of the entire lung or area (lobe) of the lung
different things you can see in a chest x ray of the lungs
consolidation, interstitial, nodule, mass, atelectasis
malaise
A general sense of being unwell, often accompanied by fatigue, diffuse pain, or lack of interest in activities.
objective findings with pneumonia
tachycardia, fever, cyanosis, dullness to percussion, inspiratory crackles, and elevated WBC
CXR
chest xray
ABX
antibiotics
if pt presents with pneumonia what type of antibiotics would you start them on?
broad spectrum until blood/sputum cultures come back and pathogen is identified
what do you need to watch out for in a person with pneumonia
bacteremia and sepsis
what needs to be ordered for a person with pneumonia
Chest xray, antibiotics, blood/sputum culture, and supportive therapy
supportive therapy
treat symptoms and prevent organ hypoxia
hypoxia
decreased oxygenation of tissue - An absence of enough oxygen in the tissues to sustain bodily functions.
what can hypoxia lead to
anaerobic metabolism which will increase lactivist acid levels
what does sepsis present as
systemic inflammatory response, vasodilation which leads to low BP, and increased vascular permeability which leads to edema
SIRS
systemic inflammatory response syndrome
pulmonary vascular disorder
disorders that occlude vessels, increase pulmonary vascular resistance, and destroy vascular bed
pulmonary embolism
occlusion of vascular bed in lungs usually from a DVT but can be from foreign body or fat
Pulmonary embolism can be either
embolus with/without infarction
infarction
tissue death due to inadequate blood supply to the affected area
what you need to know during a pulmonary embolism
Extent of Blood flow obstruction
Size of vessel
Why is it there
What is the clot doing
obstruction leads to
pulmonary vasoconstriction which causes pulmonary hypertension
pulmonary embolism with infarction
if its there long enough has the ability to cause tissue death, and the fibrinolytic system does not have the ability to dissolve clot
pulmonary embolism without infarction
embolism still there, fibrinolytic system can still dissolve clot, but getting circulation from other area – such as bronchiole arteries
how can you test for a PE
D-Dimer, BNP, CT scan
D- Dimer
test for pulmonary embolism. less than 250 – if high then we have thrombus (blood clot) formation
BNP
looks at right ventricular pressure
CT scan
help visualize a pulmonary embolism
high V/Q ratio
alveoli are ventilated but not perfused. = dead space
normal V/Q ratio
0.8, 4 (ventilation) / 5 (perfusion) = 0.8
high V/Q ration numbers
V/Q > 0.8, about 4 (ventilation) / 3 (perfusion) = 1.3 - dead space - pulmonary embolus
V/Q low
V/Q < 0.8. 2 (ventilation) / 5 (perfusion) = 0.5 perfusion without ventilation = shunt - atelectasis, asthma, pulmonary edema &PNA
what is the V/Q ration during a pulmonary embolism
high
risk factors of PE
genetics, venous stasis, hyper-coagulability, oral contraceptives
hypoxemia
decreased oxygenation of arterial blood - A low level of oxygen in the blood, inadequate exchange
what can PE cause
SOB, tachypnea, hypoxemia, tachycardia
pulmonary embolism prevention
bed exercises, early ambulation, pneumatic calf compression, prophylactic low-dose anticoagulation
what medication can you give for anticoagulation
low dose lovinox
steps to massive PE
starts with venous stasis, vessel injury, or hyper coagulability which leads to thrombus formation-dislodgment of portion of thrombus- occlusion of part of pulmonary circulation - hypoxic vasoconstriction, decrease surfactant, release of inflammatory substance, pulmonary edema, and atelectasis - signs and symptoms
PAH
pulmonary artery hypertension
cor pulmonale
Right ventricular enlargement. can be hypertrophy, dilation, or both
hypertrophy
the wall itself is enlarged
dilated
stretched chamber
idiopathic pulmonary artery hypertension
endothelial dysfunction due to increase production of vasoconstrictors and decrease production of vasodilators
why does pulmonary artery hypertension occur
increase pressure from LHF, chronic lung disease or hypoxia, chronic thromboembolism
what happens during pulmonary artery hypertension
hypoxic pulmonary artery vasoconstriction and increased pulmonary artery pressure
why does cor pulmonale occur
pulmonary artery hypertension and chronic pressure overload
what happens with cor pulmonale
pulmonic valve murmur and increase systemic venous pressure which causes JVD, hepatosplenomegaly, peripheral edema
how does PAH manifest
fatigue, chest discomfort, tachypnea, and dyspnea
most common post/op pulmonary problems
atelectasis, PNA, pulmonary edema, and PE
hypercapnia
inadequate alveolar ventilation
what can you do to prevent clots on post op patients
early ambulation
acute respiratory “failure”
inadequate gas exchange will be a little acidic with over 50 mm Hg CO2 and less than 60 mmHg of O2
acute respiratory “failure” can either be
hypercapnia or hypoxemia
hypercapnia acute respiratory “failure”
inadequate alveolar ventilation - use ventilator support
hypoxemia acute respiratory “failure”
inadequate exchange - use supplemental oxygen
ventilation
gas/air into and out of the lungs
respiration
exchange of CO2 and O2 during cellular metabolism
what do you need to oxygenate
both adequate ventilation and pefusion
tidal volume
amount of air coming in and going out should be 400-800 ml
is dyspnea subjective or objective
subjective
dyspnea
air hunger and labored breathing
dyspnea turns into objective when you see
pulmonary, cardiac, pain, psychogenic effects
psychogenic
anxiety or disorder
DOE
dyspnea on exertion
orthopnea
Discomfort when breathing while lying down flat
cough
protective reflex can be chronic or acute
acute cough
2-3 weeks
chronic cough
4-6 weeks - chronic bronchitis or lung cancer
kussmauls breathing
when you are trying to compensate when you are metabolic acidosis. increase rate, increase volume, no pause
gasping or agonal breathing
irregular quick inspiration, expiratory pause, severe cerebral hypoxia
cheyne-strokes
when you are dying. alternating deep, shallow, apnea- associated with decrease blood flow to brainstem
apnea
cessation of breath
labored breathing
can either by obstructive or restrictive
large airway labored breathing
decrease rate, increase volume, increase effort, prolonged inspiration and expiration, stridor or audible wheeze
small airway labored breathing
increased rate, decrease volume, increase effort, prolonged expiration and wheezing
hypoventilation
inadequate alveolar ventilation
potential causes of hypoventilation
respiratory depression, neuromuscular disease, trauma or pain, physiological dead space
hypercapnia
air sacs not ventilating properly leads to CO₂ retention, more CO2 production than CO2 removal
hypoventilation can lead to
hypercapnia, respiratory acidosis which can lead to hypoxemia and Altered level of consciousness
neuromuscular disease
conditions that impair the functioning of the muscles. can impact ability to ventilate
physiological dead space
where ventilation should be occurring but its not and example is pulmonary embolism
hyperventilation
excessive alveolar ventilation - blowing off too much CO2- leads to hypocapnia
potential causes of hyperventilation
pain, anxiety, head injury
hypocapnia
more CO2 removal than CO2 production
what can hypocapnia lead to
respiratory alkalosis
hypoventilation and hyperventilation is all based off
metabolic demand
deoxy hemoglobin
desaturated hemoglobin
lack of cyanosis
does not mean oxygenation is normal
O2 sat =
% of Hgb binding sites carrying oxygen
PaO2=
oxygen content of blood
O2 Sat of 90%=
PaO2 of 60 mmHg
clubbing
nail bed hypertrophy due to chronic hypoxemia
cyanosis
desaturated hemoglobin can show peripheral (finger tips) or central (face/mouth)
special circumstance of cyanosis
anemia, carbon monoxide, polycythemia
anemia
not enough Hgb - they will be pale
carbon monoxide cyanosis
Hgb saturated with wrong gas - will have a cherry hue
polycythemia
too many RBC- increased blood viscosity (increase risk of clot) and decreased tissue perfusion
hypoxemic manifestations
cyanosis, confusion, tachycardia, edema, decreased urinary output
FiO2
fraction of inspired air = 21%
if you have hypoxemia that you have
pulmonary issue
mechanism of oxygenation
oxygen delivery to alveoli and diffusion of oxygen from alveoli to blood
how is oxygen delivered to alveoli
inspired air and adequate ventilation
diffusion of oxygen from alveoli to blood
includes V/Q - alveolar ventilation and alveolar perfusion
what do the V and Q stand for in V/Q ratio and what does V/Q overall stand for
V=air entering alveoli (alveolar ventilation)
Q= blood reaching capillaries (alveolar perfusion)
V/Q = ventilation perfusion
widespread tissue dysfunction leads to
organ infarction