Respiratory Medicine Flashcards
How do we localize respiratory signs?
Upper vs. Lower
Classify the following as upper or lower respiratory: Nasal Discharge.
Upper
Classify the following as upper or lower respiratory: Sneezing/reverse sneezing.
Upper
Classify the following as upper or lower respiratory: Increased effort on inspiration
Upper
NOTE: INSPIRATION is upper, EXPIRATION is lower
Classify the following as upper or lower respiratory: Audible sounds (stertor, stridor, snoring).
Upper
Classify the following as upper or lower respiratory: Open-mouth breathing.
Upper
Classify the following as upper or lower respiratory: Pawing at face.
Upper
What does pawing at the face indicate usually?
FB in the airway
Classify the following as upper or lower respiratory: Cough.
Lower
What is the hallmark sign of lower respiratory disease?
Coughing
What must you also keep in mind when you see coughing?
Heart disease
Classify the following as upper or lower respiratory: Respiratory distress.
Lower
Classify the following as upper or lower respiratory: Increased effort on expiration.
Lower
What is almost always the cause of nasal discharge?
Nasal cavity disease.
Name 4 types of discharge.
Serous
Mucopurulent
Mucoid
Hemorrhagic
What often accompanies nasal discharge?
Sneezing
What are two key aspects of the physical exam?
Signalment and history
What are two ways we can examine nasal airflow?
Glass slide
Wisp of cotton
What are two things you should NORMALLY be able to do in a physical exam that you might not in nasal cavity disease?
Ocular retropulsion
Depress the soft palate
Where does sneezing localize disease to?
Nasal cavity
Is a reverse sneeze a problem?
No
What is stertor?
Gurgling or snoring
What is stridor?
High-pitched noise or whine usually on expiraion
When can you hear expiratory stridor?
Intrathoracic tracheal collapse (laryngeal paralysis)
What is the hallmark of trachea/lung disease or cardiac failure?
Cough
What are 3 triggers of coughing?
Inflammatory products
Excessive secretions
Airway collapse
How are coughs classified?
Dry, non-productive
Wet, productive
What is your next step with a non-cardiogenic cough?
Chest RADs
If you take chest RADs for a cough and they’re normal, what must you consider?
Tracheal disorders
If you take chest RADs for a cough and they’re abnormal, what does that tell you?
Lower airway and pulmonary parenchyma disease
What is important to remember about the term dyspnea?
It is a human term. In vet med, we should use “respiratory distress”.
What is tachypnea?
Increased RR
Is tachypnea always bad?
No
What is panting?
In dog, dispels heat. In cats can mean respiratory distress or stress.
What is orthopnea?
Upright position with elbows abducted
THINK PLEURAL DISEASE
What is respiratory distress most often associated with?
Lower airway disease
When does tachypnea become respiratory distress?
When it is causing distress
What is respiratory distress all about?
The O2.
What are 5 causes of respiratory distress?
Insufficient O2 in inspired air Insufficient ventilation Insufficient circulation Insufficient RBC Abnormal Hb
What does cyanosis indicate?
Severe hypoexemia
What are 5 things you should do in your physical exam to determine site of respiratory signs?
Listen Observe respiratory pattern Check for nasal airflow (if upper airway obstruction) Tracheal palpation Auscult lungs
What does increased INSPIRATORY effort indicate?
Upper airway obstruction
What does increased EXPIRATORY effort indicate?
Lower airway obstruction
Describe normal bronchial sounds.
Loudest over hilus
During expiration
Sounds like wind blowing
Describe normal vesicular sounds.
Best on inspiration
At periphery of chest
Sounds like rustling leaves
Describe normal bronchovesicular sounds.
Mixture of bronchial and vesicular, but mostly expiratory
Increase in intensity at central airway
What causes “crackles” in the lungs?
Airways snapping open (closed due to fluid in or around them)
What causes wheezes?
Airflow through a narrow opening
When are wheezes best heard?
Expiration
If you hear a loud snap over the hilus at the end of expiration, what should you be thinking?
Collapse of intrathoracic trachea, carina or mainstem bronchi
What do “goose honks” indicate?
Tracheal collapse
What causes a creaking/grating sound?
Pleural friction rubs
What is the most important diagnostic test for signs of respiratory system disease?
Imaging
What MUST you do before imaging?
Stabilize patient
Is a minimum database required for all respiratory cases?
No
What 2 things can sometimes be more important than the minimum database?
Fecal
HWT
What has become the standard for evaluating the nasal cavity?
CT/MRI
What are 3 indications for a nasal flush?
FB suspected
Cleanse airways prior to rhinoscopy
Obtain samples for cytology
What is the difference between a rhinoscopy and a bronchoscopy?
Rhinoscopy is just the nasal cavity
Bronchoscopy looks at lower respiratory tract
What landmark do you NEVER pass when performing a blind core biopsy?
Medial canthus of the eye
What must you be careful not to hit when performing a blind core biopsy?
Cribiform plate
When is bronchoscopy contraindicated?
In sever respiratory compromise UNLESS therapeutic (removing FB)
When is a Bronchoalveolar lavage (BAL) indicated?
Lung dz involving small airway, alveoli or interstitium
What can be done to retrieve material from within lungs for sampling?
BAL
On what patients can you perform a transtracheal wash and aspirate?
Medium-larger breed dogs
On what patients can you perform an endotracheal or transoral wash and aspirate?
Cats and tiny dogs
What are 2 indications for a transthoracic lung aspiration?
Intrathoracic mass (in contact with thoracic wall) Diffuse disease
What is a contraindication to a transthoracic lung aspiration?
An abscess
What are 3 possible complications of a transthoracic lung aspiration?
Hemothorax
Pneumothorax
Potentially pyothorax later
What are 2 reasons for placing a chest tube?
Treatment of pyothorax
Management of pneumothorax
What is coupage?
Banging on the chest
What is the purpose of coupage?
To break up mucous
If you see nasal discharge and depigmentation, what should you think of?
Aspergillosis
What are the top 5 things on your differential list for nasal discharge?
FB Rhinitis Dental dz Neoplasia Trauma
What 5 things do we expect to see with a nasal FB?
Acute onset Acute sneezing Gagging/reverse sneezing Pawing Discharge (serous -> mucopurulent after time)
What is rhinitis?
Inflammation of the nasal cavity
What 2 pathogens are responsible for 90% of feline upper resp. cases?
Feline herpesvirus
Feline calicivirus
What 4 pathogens are responsible for 10% of feline upper resp. cases?
Chlamydophyla felis
Mycoplasma
Coronavirus
Bordatella
What is a key sign of feline herpesvirus?
Corneal ulcers/ulcerative keratitis
What are 2 key signs of feline calicivirus?
Oral ulcers (and on nose) Pneumonia
What causes limping kitten syndrome?
Feline calicivirus
What is a key sign of Chlmydophyla?
Conjunctivitis with chemosis (conjunctival edema)
Which virus is shed with stress?
Herpesvirus
Which 2 viruses can be shed with or without stress?
Calici
Chlamdyophyla
How is feline herpes transmitted?
Direct contact
Fomites (US!!)
Why do we treat cats with herpesvirus with systemic abx?
Secondary infections
What are 3 sequelae to herpesvirus?
Chronic rhinitis (turbinate damage = "snuffler") Chronic conjunctivitis Fibrosis of lacrimal ducts = epiphora (overflow of tears)
What does oral lysine do?
Reduces herpes virus replication
What are the 2 oral antivirals we use?
Famciclovir
Acyclovir
What are 2 other treatments for herpes cats that fall under “supportive care”?
Abx for secondary infection
Fluids (keeps animal hydrated and mucus is less sticky)
How can the herpes vaccine be administered?
Parenteral
Intranasal
Which herpes vaccine formulation is best in outbreaks?
Intranasal
Intranasal is not blocked by maternal abs like parenteral is
Which herpes vaccine formulation may prevent the carrier state?
Intranasal
What is important to remember about calicivirus?
Has a high mutation rate and no cross protection from vaccines
What 2 ways is calicivirus transmitted?
Via direct contact or fomites
T/F: Calicivirus is easily killed with routine disinfectants.
False. It is resistant and has a longer survival time in the environment
What are the 2 distinct calicivirus syndromes?
Limping Kitten Syndrome
Virulent Hemorrhagic Systemic Syndrome
What 3 signs do we see with limping kitten syndrome?
Lameness
Ulcers on paws
Sore joints
Does the normal calicivirus vaccine strain protect against Virulent Hemorrhagic Systemic Syndrome?
No
What is the main treatment for Calicivirus?
Mostly supportive
What 4 sequelae can you see from calicivirus?
Chronic rhinitis
Sinusitis
Conjunctivitis
Carrier state
What is the hallmark sign of Chlamydophila felis?
Conjunctivitis with chemosis
What 2 ways can you dx Chlamydophila felis?
Conjuctival smear (see intracytoplasmic inclusions) PCR: conjunctivia, nares or oropharynx
How do you treat Chlamydophila felis?
Topical tetracycline or erythromycin
If systemic: oral doxy or azithromycin
NOTE: Remember to give water with doxy to prevent esophageal stricture.
Why isn’t chlamydophila felis vaccine core?
More reactive than other antigens
What are the 6 basics for treating upper respiratory dx in cats?
Warm and hydrated Remove crusts Humidify Topical decongestants Systemic abx Topical opthalmics
What topical decongestant is preferred when treating a cat with upper respiratory dz?
Phenylephrine
What would you always consider as secondary with nasal discharge?
Bacterial rhinitis
What are the 2 big signs of nasal aspergillosis?
Nasal ulceration and depigmentation
If you suspect aspergillosis, what is the best sample to collect?
Plaques, though can be done on discharge if owner can’t afford rhinoscopy to retrieve plaques
How is aspergillosis treated?
Often referred.
Debride, then infuse 1% clotrimazole or 2% enilconazole over 1hr
What is a contraindication to treatment for aspergillosis?
Damaged cribiform plate
Most common cause of fungal rhinitis in dogs is?
Aspergillosis
Mots common cause of fungal rhinitis in cats is?
Cryptococcosis (sometimes dogs too)
What dog is most susceptible to fungal rhinitis?
Dolichocephalics
What signs do you see with Cryptococcosis in cats?
Chorioretinitis
How can you dx Cryptococcosis in cats (2 ways)?
Organisms often in nasal discharge
Serum titers reliable (Ag test, not Ab)
How do you treat Cryptococcosis?
Conazoles systematically
What are the 2 key signs of nasal mites?
Sneezing
Reverse sneezing
How do you treat nasal mites?
Ivermectin
Do you see nasal mites if the dog is on Heartworm preventative?
Nope
What is lymphoplasmacytic rhinitis?
Lymphoplasmacytic infiltration of nasal mucosa
What dogs are often affected with lymphoplasmacytic rhinitis?
Dolichocephalics
Is it likely lymphoplasmacytic rhinitis if you see destruction of nasal septum, frontal sinus or cribiform plate?
No
What would lymphoplasmacytic rhinitis look like on rhinoscopy?
Red, edematous mucosa that bleeds easily and turbinate atrophy
How do you treat lymphoplasmacytic rhinitis?
Nothing effective, avoid all smoke
Maroptiant used off label as an antiinflammatory
What are two major signs you see with nasal neoplasia?
Loss of airflow (d/t mass effect)
Facial deformity
What else can look like nasal neoplasia?
Fungal rhinitis
What 3 ways can you diagnose nasal cancer?
Nasal discharge cytology (sometimes you get lucky)
FNA of ipsilateral l.n. (sometimes you get lucky)
Rhinoscopy (not always available)
What is the last resort for diagnosing nasal cancer?
Rhinotomy
What is the treatment of choice for nasal cancer?
Radiation (survival to 12-16mos with debulking)
What is the cause of death with nasal cancer?
Airway obstruction
Why is chemotherapy not commonly used for nasal cancer?
Only effective on LSA
What 2 nasal cancers have the better prognosis?
Adenocarcinomas
Sarcomas
NOTE: after radiation
What 2 nasal cancers have the worse prognosis?
Undifferentiated carcinomas
Squamous cell carcinomas
T/F: Cats live longer than dogs with radiation.
True… Of course they do.
What is the typical signalment of a dog with nasal neoplasia?
Older (>8yrs), long nosed breeds predisposed
T/F: Most nasal neoplasias are malignant.
True
What are the 2 most common types of nasal neoplasia in dogs?
Adenocarcinoma
Squamous Cell Carcinoma
What are the 2 most common types of nasal neoplasia in cats?
Lymphoma
Adenocarcinoma
What is ciliary dyskinesia?
Immotile ciliary
How does a dog get ciliary dyskinesia?
Autosomal recessive gene
What is affected by ciliary dyskinesia?
Nasal cavity, trachea and lower airways
Describe the classic presentation of ciliary dyskinesis.
Young
Purebreed
Recurrent respiratory tract infection/signs**
What is Kartagner’s Syndrome?
Bronchiectasis, situs inversus and chronic rhinosinusitis
Bronchiectasis = abnormal widening of the bronchi or their branches, causing a risk of infection
Situs inversus = inverted position of chest and abdominal organ
How do you diagnose ciliary dyskinesis?
Biopsy and TEM
What do you do to treat ciliary dyskinesis?
Nothing
What is the most common sign of tracheal and bronchial disease?
Cough
What are the top 4 signs you see with tracheal and bronchial disease?
Cough (#1)
Wheezing
Inspiratory sounds
Retch/gag
What is kennel cough?
A complex caused by both bacteria and viruses.
Can be one or multiple organisms
What 4 organisms most commonly cause kennel cough?
Parainfluenza
Canine adenovirus 2
Mycoplasma
Bordatella
What severity of signs do you see with kennel cough caused by Parainfluenza?
Mild
What severity of signs do you see with kennel cough caused by Canine adenovirus 2?
Mild
What severity of signs do you see with kennel cough caused by Mycoplasma?
Mild to severe
What severity of signs do you see with kennel cough caused by Bordatella?
Mild to severe
How is kennel cough spread?
Respiratory secretions and fomites
VERY CONTAGIOUS!!
Describe “uncomplicated kennel cough”.
Happy dog with dry cough on tracheal palpation, serous oculonasal discharge, gagging/retching.
Upper resp. only.
Describe “complicated kennel cough”.
Sick dog with moist cough, mucopurulent oculonasal discharge, can progress to bronchopneumonia.
Upper and lower resp.
When do clinical signs of kennel cough develop?
4-10 days post exposure
If you have the complicated form of kennel cough, what else might you want to look at besides history and clinical signs?
Hemogram
Thoracic RADs
TTW cytology and culture
How do you treat uncomplicated kennel cough?
Restrict exercise
Doxycycline (if Bordatella suspected)
Cough suppressants
How quickly does uncomplicated kennel cough usually resolve?
Within 2 weeks
How do you treat complicated kennel cough?
Restrict exercise
Systemic Abx (2weeks)
Nebulization with Gentamycin to decrease cough (patient will be hospitalized)
Cough supressants (UNLESS BACTERIAL PNEUMONIA PRESENT)
Brochodilators (Theophylline
NOTE: Penicillin not a good choice d/t poor levels in respiratory secretions
NOTES: Avoid or decrease bronchodilator dose by 30% if using quinolone Abx
What is a general rule about the use of cough supressants?
DO NOT USE in a productive cough
What is the prognosis of kennel cough?
Good to excellent
What are 4 ways to prevent kennel cough?
Parenteral vaccine (CAV and Parainfluenza)
Intranasal and oral vaccine (Parainfluenza and Bordatella)
Sanitation (Bleach diluted 1:32)
Ventilation in kennels
What is canine influenza related to?
Equine flu
How is canine influenza transmitted?
Direct contact with respiratory secretions/fomites
What percentage of dogs with influenza have signs?
80%
What is your window to get samples for a PCR to confirm canine influenza?
Within 72 hours of onset
Describe mild/uncomplicated canine influenza.
Looks like mild/uncomplicated kennel cough.
Describe severe/complicated canine influenza.
High fever
Hemorrhagic pneumonia (coughing up blood)
Rapid onset, can be fatal in hours
What is the mortality rate of severe/complicated canine influenza?
5-8%
How do you treat canine influenza?
Supportive care
Systemic Abx if severe
How do you prevent canine influenza?
Vaccine available, but not core!
Isolate sick and exposed dogs.
Change clothes and wash hands between patients
What age of dog do you typically see Oslerus osleri in?
Younger dogs
What 3 signs do Oslerus osleri commonly cause?
Cough
Wheezing
Dyspnea
How can you diagnose Oslerus osleri?
Tracheal mass on xray
Mass seen with broncoscopy
Brushings/biopsy of mass
Fecal exam
What 2 drugs can you use to treat Oslerus osleri?
Ivermectin
Fenbendazole
What is the typical signalment for collapsing tracheas?
Middle age to older, small or toy breed dogs, often obese
What is tracheal collapse?
Reduction in chondrocytes allows cartilage to weaken so tracheal rings collapse -> causes irritation, edema and inflammation -> rings loose firmness and collapse
What is the typical sign of collapsing trachea?
Goose honk cough
What types of things might exacerbate a collapsing trachea?
Excitement, exercise, eating
What else do dogs with a collapsing trachea seem to have commonly?
Hepatomegaly
Theory: O2 deprivation results in liver disease. Liver function improves with the placement of a stent.
What 3 ways can you dx a collapsing trachea?
Thoracic/cervical RADs
Fluoroscopy
Bronchoscopy
What is the BEST dx tool for a collapsing trachea?
Bronchoscopy
What 5 steps should you take in the case of an acute severe collapsing trachea?
Clam patient/owner Cough suppressant Corticosteroid O2 Be prepared to intubate
What are 4 things the owner can do to help their chronic collapsing trachea dog?
Weight loss
Avoid neck collars
Avoid excitement
Avoid smoke, dust, pollen, carpet cleaner
What 3 things can we use to treat the chronic collapsing trachea dog?
Cough suppressants
Short course, low dose corticosteroids
Abx for secondary infection
What is another name for chronic canine bronchitis?
Chronic obstructive pulmonary disease
What is the result of chronic canine bronchitis?
a daily cough >2mos duration
What is chronic canine bronchitis?
Inflammation of bronchial walls -> thickened walls -> increased mucus blocking small air ways
What are 3 long term sequelae of chronic canine bronchitis?
Emphysema
Bronchiectasis
Pneumonia
T/F: Chronic canine bronchitis is similar to asthma in people or cats.
FALSE!!!!
What is the signalment of a chronic canine bronchitis dog?
Same as for collapsing trachea.
Small breed, middle to old age, obese small breed.
What might you also find on physical exam of a dog with chronic canine bronchitis (2 things)?
Concurrent tacheal collapse
Mitral insufficiency
How do you diagnose chronic canine bronchitis (3 ways)?
Chest RADs
Bronchoscopy
Bronchial cytology and culture
Why does it help to keep a dog with chronic canine bronchitis hydrated?
Aids mucociliary clearance
What can you give a dog with chronic canine bronchitis to reduce inflammation?
Prednisolone
What is the signalment for a cat with idiopathic feline bronchitis.
Any age, but commonly young to middle age
SIAMESE predisposed
What are the 2 major signs of idiopathic feline bronchitis?
Chronic or intermittent cough
Acute respiratory distress (911!!!!)
What is another name for idiopathic feline bronchitis?
Feline asthma
What 3 things might you note with feline asthma on auscultation?
Wheezes
Crackles
Increased inspiratory effort
Compare the sounds heard on auscultation of an asthma cat and a cat with pleural effusion.
Asthma will hear more bronchovesicular sounds.
Pleural effusion will result in muffled sounds.
What is the temprament of a cat with asthma.
Usually an otherwise happy cat.
Contrast: Pleural effusion cats are sick kitties
What is the first step in working up a cough/wheeze in a cat (3 things)?
RADs if cat is stable
CBC
Fecal exam
What 2 things are in the second step of a work up for a cat that has a cough/wheeze?
TTW/Bronchoscopy
Cytology/culture
What percentage of cats with asthma have normal RADs?
23%
What is the most common radiographic sign you will see in an asthmatic cat?
Bronchial pattern
What are 4 other things you might see on RADs of an asthmatic cat (besides bronchial pattern)?
Interstitial and patchy alveolar opacities
Hyperinflation of lungs (REALLY black lungs)
10% have collapse of right middle lung lobe
Flattening of diaphragm
What will you see on cytology of an asthma case?
Increased eos or neuts and mized inflammation
What will you see on cytology of a coughing/wheezing cat with an infection etiology?
Degenerate neuts +/- intracellular bacteria
If culture is positive in a coughing/wheezing cat, is it likely asthma?
No, but should consider secondary infection
What 4 things do you do to manage the acute bronchoconstricted or severe respiratory distress cat?
No stress
O2
Terbutaline (might make cat “spacey”) or Albuterol via MDI
Dex
What 4 things do you do to manage the chronic intermittent coughing or wheezing cat?
Prednisolone
No more smoke in the house, avoid other irritants
Metered dose inhaler once signs are under control with oral steroids
What are 3 advantages of an MDI?
Less systemic corticosteroid effects
Easier to treat
Possibly higher drug concentration to the lungs
What are 3 disadvantages of an MDI?
Increased risk of dental dz (immune compromise in the mouth)
Re-emergence of latent herpes virus
Local dermatitis (irritating to lips)
What are 2 other possible long-term treatments?
Oral bronchodilators
Antibiotics
What 2 oral bronchodilators would you use?
Oral theophylline
Terbutaline
What are the 3 major indications for a bronchodilator in a cat?
When large quantities of glucocorticoid needed
Adverse to glucocorticoid
Owner can’t use MDI
What is the prognosis for long term medically treated feline asthma?
Good
What is the prognosis for untreated feline asthma?
Permanent changes
- Bronchitis with fibrosis
- Emphysema
What is the typical signalment for chronic bronchitis in cats?
Typically older cats
What are 2 major characteristics of chronic bronchitis?
Neutrophili inflammation
Excessive mucus production
What do the clinical signs of chronic bronchitis look like?
Feline asthma
What is the focus of management in chronic bronchitis?
Control of inflammation with glucocorticoids
What are 5 major signs of lung disease?
Difficulty on expiration Cough Exercise intolerance Abnormal lung sounds Abnormal posture
What posture would you see in lung disease?
Orthopnea
What is pneumonia?
Inflammatory disorder of lung parenchyma
What are 5 causes of pneumonia?
Bacterial Aspiration Viral Fungal Parasitic
What is the most common cause of pneumonia in dogs?
Bacteria
Describe the cough in a pneumonia case.
Soft and ineffectual
What 3 systemic signs you expect with a pneumonia case?
Fever
Lethargy
Poor appetite
What age group typically gets PRIMARY bacterial pneumonia?
Yonger dogs
What age group typically gets SECONDARY bacterial pneumonia?
Older dogs
What are the 2 main causes for primary bacterial pneumonia?
Bordatella
Pasturella
What are the top 5 causes for secondary pneumonia?
Aspiration FB Neoplasia Viral or fungal infection Bronchitis
What is an important thing to remember if a dog was recently sedated or anesthetized and has pneumonia?
Likely more resistant because of “hospital bugs”
What are 2 good ways to dx bacterial pneumonia?
Thoracic RADs
Hemogram
What 2 things do you expect to see on thoracic RADs of a bacterial pneumonia suspect?
Interstitial pattern
Alveolar pattern
What 2 things do you expect to find on a hemogram of a bacterial pneumonia suspect?
Neutrophilic leukocytosis with left shift
Monocytosis IF chronic
What can bacterial pneumonia result in?
Sepsis -> ALI (acute lung injury) -> ARDS (acute respiratory distress syndrome) (death)
What 3 general things can you do to treat bacterial pneumonia?
Abx
Nebulization
Supportive care
What sort of Abx would you look to to treat bacterial pneumonia?
Broad-specturum (4 quadrant = G+, G-, aerobe, anaerobe)
How long should you treat a bacterial pneumonia case with Abx?
4-8 WEEKS
What dose nebulization help do?
Mobilizes airway secretions
What is often added to saline in a nebulizer to treat G-?
Gentamicin
What 4 things would you considder as supportive care for a bacterial pneumonia case?
Fluids
O2
Coupage
+/- Bronchodilators
What respiratory signs will you see with a mycotic pneumonia?
Similar to bacterial pneumonia (cough, exercise intolerance)
What 3 things can you use to diagnose mycotic pneumonia?
Cytology/Histology
Urine
Serum antigens
What do you see in serum of bacterial pneumonia vs. mycotic pneumonia?
Bacterial: Degenerate neuts with bacteria
Mycotic: eos, monos, plasma cells, happy neuts
What 3 things might you use to treat mycotic pneumonia?
Itraconazole
Amphotericin B
Ketoconazole
How might geographic location help with determining fungal organism.
Certain fungi are common to certain areas
What else might you see in the case of a mycotic pneumonia caused by histoplasmosis?
GI signs
What cytology will help you determine causative agent in mycotic pneumonia?
L.N. Draining lesions TTW/BAL Endotracheal wash Lung aspirate
What fungi is detected by serum ANTIGEN titer?
Cryptococcus
What 3 fungi are detected by urine ANTIGEN?
Blasto
Histo
Valley fever
How long do you treat mycotic pneumonia?
4-12+ MONTHS
Which conazole is good to use in mycotic pneumonia cases with CNS signs?
Fluconazole
What do you need to monitor when treating with Amphotericin B and why?
Monitor BUN and Creatinine because nephrotoxic
What do you expect in the first week of treating mycotic pneumonia?
Increase chance of worsening of respiratory signs
How effective is treatment on Blasto and Crypto?
80%
What is the prognosis of localized Histo vs. disseminated Histo?
Disseminated = guarded Localized = better
What is the recovery rate of Coccidio?
60%
BUT meds often needed for 6-12 months+ (sometimes lifetime)
What are the 2 causes of parasitic pneumonia?
Aleurostrongylus abstrusus (cat) Paragonimus kellicoti (dog/cat)
What would you see on chest RADs in a cat with Aleurostrongylus abstrusus?
Diffuse, nodular densities usually in caudal lobes
How do you diagnose Aleurostrongylus abstrusus?
Larvae in fecal exam
How do you treat Aleurostrongylus abstrusus (2 meds)?
Fenbendazole
Ivermectin
What is a possible complication of Paragonimus kellicoti?
Cysts rupture = Pneumothorax
What might you see on chest RADs with Paragonimus kellicoti?
May see air-filled sacs
What is idiopathic pulmonary fibrosis?
Chronic fibrosis of lung interstitium
How is idiopathic pulmonary fibrosis characterized (2 things)?
Infiltration of fibroblasts
Collagen deposition
What is the typical signalment for idiopathic pulmonary fibrosis?
Terriers
Middle age to older
Some cats
What is the history of idiopathic pulmonary fibrosis?
Slow onset exercise intolerance
What is the most noticeable clinical sign of idiopathic pulmonary fibrosis?
Respiratory distress and tachypnea
What is the hallmark finding on a dog with idiopathic pulmonary fibrosis?
Inspiratory crackles
What woudl you find on a blood gas of a dog with idiopathic pulmonary fibrosis?
Hypoexemia if severe
What can you use to help eliminate other Ddx when you suspect idiopathic pulmonary fibrosis?
TTW/BAL
Will find non-degenerate neuts, lymphocytes
Epithelial dysplasia
What is the definitive dx for idiopathic pulmonary fibrosis?
Lung biopsy
How can you treat idiopathic pulmonary fibrosis?
Corticosteroids + bronchodilators
What is the prognosis for a dog with idiopathic pulmonary fibrosis?
Guarded d/t progressive respiratory failure
What are the 2 types of primary pulmonary neoplasia?
Adenocarcinoma
Squamous Cell Carcinoma
What are the 4 types of metastatic pulmonary neoplasia?
Adenocarcinoma
Osterosarcoma/Chondrosarcoma
Hamangiosarcoma; oral/digital melanoma
SCC
What type of cancer is most common in the lungs?
Metastatic
What are 3 types of multicentric pulmonary neoplasia you might see?
Lymphoma
Malignant histiocytosis
Mastocytoma
Why are mets so common to find in the lung?
The lung acts as a filter for these cells
What is the signalment for pulmonary neoplasia?
Usually older animal
What respiratory signs do you see with pulmonary neoplasia?
Cough
Laboured breathing
Increased RR
Hemoptysis (coughing up blood)
What would you expect to hear in the lungs if you suspect pulmonary neoplasia?
Crackles
Wheezes
Muffled
What non-respiratory signs might you expect to see (5 things)?
Weight loss Inappetence Lameness (Hypertrophic osteopathy) Dysphagia/regurg Head/neck edema
Why might you see lameness in a case of pulmonary neoplasia?
HOP (hypertrophic osteopathy)
How do you gain a tentative diagnosis of pulmonary neoplasia?
Thoracic RADs
THREE VIEWS!!!!!
Where do you gain a histological or cytological sample?
Bronchoscopy (and BAL)
FNA
NOTE: BAL may not show anything because don’t often exfoliate cells
What is the treatment for a primary pulmonary neoplasia?
Surgery if it’s a single nodule
What is the treatment for mets in the lungs?
Treat primary mass
Can use chemotherapy in lymphoma
What is the prognosis for pulmonary neoplasia?
Guarded to poor
T/F: Malignant pulmonary neoplasia better than benign?
False
T/F: Primary pulmonary neoplasia better than mets?
True
T/F: SCC better than adenocarcinoma in the lungs?
False
T/F: Small pulmonary neoplasia better than large?
True
T/F: Tumors in one lung better than entire lung?
True
T/F: No l.n. involvement better than l.n. involvement?
True
What is pulmonary edema?
Accumulation of fluid in alveoli or pulmonary interstitium
What do you need to determine in pulmonary edema?
Cardiogenic or non-cardiogenic
If you have pulmonary edema, where will you hear crackles?
Perihilar area
What are 4 general mechanisms of non-cardiogenic pulmonary edema?
Vascular overload/increased hydrostatic pressure
Decreased oncotic pressure (PLE and PLN)
Increased alveolar-capillary membrane permeability***
Lymphatic obstruction
What are 3 pulmonary causes for increased alveolar-capillary membrane permeability?
Aspiration
Upper airway obstruction
Smoke
What are 5 non-pulmonary causes for increased alveolar-capillary membrane permeability?
Sepsis Electric shock CNS dz Pancreatitis DIC
What 2 things can pulmonary edema progress to?
Acute Lung Injury (ALI)
Acute Respiratory Distress Syndrome (ARDS) -> Respiratory failure
What would you hear on thoracic auscultation with non-cardiogenic pulmonary edema?
Crackles
What would you see on thoracic RADs with non-cardiogenic pulmonary edema?
Perihilar infiltrate Alveolar pattern (bilateral) Caudodorsal lung fields are affected
How do you treat non-cardiogenic pulmonary edema (3 things)
Aggressive control of primary dz
Cage rest with O2
Supportive care (sedation to relax, cautious fluid therapy, Positive Pressure ventilation in severe cases)
What is the prognosis for non-cardiogenic pulmonary edema?
Guarded if d/t permeability edema
Better if d.t fluid overload and if renal fxn is intact
What is the cause of ALI?
Pulmonary inflammation and edema
NOTE: NOT a dx, but a clinical description
What is ARDS?
Severe form of ALI
What is the difference between ALI and ARDS?
Degree of hypoxemia
What are ARDS/ALI most commonly a sequela of (3 things)?
Sepsis
Shock
Bacterial pneumonia
How soon after the inciting incident might you see clinical signs of ARDS/ALI?
1-4days
What are the clinical signs of ARDS/ALI?
Progressive hypoxemia
Respiratory distress
Cyanosis
Is ALI/ARDS primary?
No, will be secondary to something else.
How do you treat ALI/ARDS?
Aggressive supportive therapy
24-7 care
Positive pressure ventilation
What is the prognosis for ALI/ARDS?
Mortality close to 100%… so not good.
What 2 clues might you see to tip you off to pulmonary contusions?
Bloody nose
Bloody mouth
What are clinical signs of pulmonary contusions?
Various degrees of respiratory distress
What might you see pulmonary contusions concurrent with?
Blunt force trauma (eg. HBC)
What is important to remember with pulmonary contusions?
Changes may take 2-12 hours to show up.
MUST MONITOR for 24-48hrs
What is eosinophilic bronchopneumopathy?
Inflammation of lungs caused by hypersensitivity to unknown antigen.
What breed is predisposed to eosinophilic bronchopneumopathy?
Siberian huskies
What age do we typically see eosinophilic bronchopneumopathy in?
Young to middle age dogs
What do we typically see clinically with eosinophilic bronchopneumopathy?
Harsh cough
Lack of response to Abx also common
When it comes to treatment of eosinophilic bronchopneumopathy, what do we need to consider if planning on giving steroids?
If patient has bacterial or fungal infection, will make infection WORSE
What might you see on the hemogram in a patient with eosinophilic bronchopneumopathy?
1/2 the cases have increased WBCs (neuts or eos)
What 2 other tests should be done if you see eosinophilic bronchopneumopathy?
Heartworm
Fecal
If you perform a TTW, BAL or endotracheal wash on a patient with eosinophilic bronchopneumopathy, what cell type will predominate?
Eosinophils (20-25%)
How do you treat eosinophilic bronchopneumopathy?
Find and treat the underlying cause
Can give corticosteroids BUT…
BE CAREFUL TO LOOK FOR PROTOZOAL, BACTERIAL OR FUNGAL INFECTIONS FIRST
How long is treatment for eosinophilic bronchopneumopathy?
Often need long term because of replases
What is the treatment for pulmonary thromboembolism (6 things)?
O2 Keep calm Tx underlying dzz Bronchodilators Pred if IMHA or HW Low dose heparin if DIC or hypercoagulable
What is the prognosis for pulmonary thromboembolism?
Poor to grave