Term
When is serologic testing used in diagnosing respiratory disease? |
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Definition
Primarily with fungal infections |
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Term
What are the common fungal infections that cause respiratory disease? |
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Definition
Cryptococcus neoformans
Blastomyces spp
Histoplasma spp
Aspergilus spp |
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Term
When would you use a nasal cavity culture? |
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Definition
You shouldn't - they are often not helpful diagnostically
there can be laboratory contaminants - only pure samples cultures are relevant |
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Term
Where does nasal secretions originate from? |
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Definition
Epithelium
Submucosal glands
anterior nasal glands |
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Term
In which direction do normal nasal secretions flow? |
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Definition
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Term
What is the most common nasal tumor? |
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Definition
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Term
What are the common clinical presentations of allergic rhinitis? |
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Definition
sneezing - periodic
seasonality
normal TPR
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Term
What are the causes of viral rhinitis?
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Definition
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Term
What would be a differential when you notice nasaland/or facial deformities? |
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Definition
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Term
What is the treatment for naso-pharyngeal polyps? |
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Definition
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Term
What are some problems with surgically removing naso-pharyngeal polyps? |
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Definition
HORNERS syndrome - which usually resolves in a few weeks |
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Term
All patients with bacterial rhinitis have a primary, chronic inflammatory disease involing the nasal passages.
True or false? |
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Definition
TRUE
things like foreign bodies, aspiration pneumonia
without resolving the underlying problem they will not ever truely clear up |
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Term
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Definition
It is a flat, pale, poorly staining red blood cell
associated with chronic blood loss/iron deficiency anemia |
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Term
Why may animals that are chronically bleeding into pleural, peritoneum, or pericardial space not show anemia initially? |
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Definition
They can auto-transfuse - they reabsorb the RBC within 1-2 weeks |
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Term
Hemoglobinuria and hemoglobinemia will be found with which?
A) intravascular hemolysis
B) extravascular hemolysis
C) Both |
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Definition
Intravascular hemolysis
this is where port wine colored urine will be seen
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Term
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Definition
A RBC that has undergone partial phagocytosis leaking it without the normal central pallor that is seen in normal RBCs |
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Term
Which antibody is most associated in auto-agglutination ? |
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Definition
IgM
because it is a pentamer and will hold 5
this makes it easier to bundle together |
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Term
Direct coombs testing should be preformed:
A) when IMHA is suspected but auto-agglutination is negative
B) when IMHA is suspected and aut-agglutination is positive to confirm
C) With ALL CBCs |
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Definition
A)
If the animal is already positive for auto-agglutination
then there is no reason to run a coombs test
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Term
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Definition
Immune destruction of platelets in addition to IMHA
this decreases the prognosis |
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Term
Why may patients with IMHA have elevated levels of hepatic enzymes? |
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Definition
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Term
What changes may been seen in the serum biochemistry with IMHA? |
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Definition
Elevated globulins (immune response)
Elevated hepatic enzymes (hepatocyte ypoxia)
Cholestasis
Pre-renal azotemia
Rarey - acute renal failure (from ischemia, DIC, sepsis)
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Term
What type of reaction is IMHA? |
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Definition
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Term
In what breeds is IMHA commonly found? |
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Definition
COCKER SPANIEL
Poodle
Irish Setter
Old English Setter |
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Term
Which antibody activates complement more efficiency: IgG or IgM? |
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Definition
IgM
it is a pentamer so it can grab onto more |
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Term
What are some of the inherited causes of IMHA? |
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Definition
PK deficiency
Phosphofructokinase deficiency
Chondrodysplasia/anemia
Nonspherocytic hemolytic anemia |
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Term
What is neonatal isoerythrolysis? |
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Definition
This is where the mother (usually of kittens and foals) have antibody against the offsprings blood type.
This is a primary cause of IMHA |
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Term
How is primary IMHA definitively diagnosed? |
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Definition
It's not - Other causes of IMHA are ruled out - leaving primary as the reason |
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Term
What are the four principles of treating IMHA? |
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Definition
Provide supportive care (hydration, diuresis)
Treat tissue hypoxia (blood transfusion)
Prevent hemolysis with immunosuppressive therapy
(prednisone/prednisolone/dexamethasone)
Deter formation of thrombi
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Term
Immune suppression is a method of treating IMHA, but also can increase the risk of sepsis, so prophylactic antibiotics should be administered,
True or False? |
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Definition
FALSE
prophylactic antibiotics are not indicated |
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Term
Which of the following is the primary treatment for IMHA?
A) Broad spectrum antibiotics
B) Prednisone
C) Azathioprine
D) Splenectomy |
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Definition
Answer: B)
these are the immunosuppressive drug of choice, but if causing to many side effects, move on to Azatioprine, and if not responsive - splenectomy (last resort)
antibiotics are not indicated for IMHA until there is in infection
HOWEVER - it may be that there is more than one drug at a time used to treat this |
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Term
What is the dosage of aspirin in managment of thrombi in IMHA? |
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Definition
Ultra LOW dose - 0.5 mg/kg |
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Term
What is what of the main reasons for relapse of IMHA? |
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Definition
when treating - the drugs are not tapered off slowly enough and the animal ends up relapsing |
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Term
What are the most clinically important Canine blood groups? |
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Definition
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Term
What is the difference between typing of cat and dog blood? |
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Definition
Cats have naturally occuring alloantibodies and dogs do not. Dogs do NOT have to be typed before transfusion where cats it is a must (can be fatal)!!! |
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Term
Which of the following situations can be FATAL?
A) Giving type A blood to a type A cat
B) Giving type B blood to a type B cat
C) Giving type A blood to a type B cat
D) Giving type B blood to a type A cat |
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Definition
C) giving type A to a type B
Type A is the more common blood type by far
All cats should be typed PRIOR to any transfusion |
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Term
Why are greyhounds a good choice for a blood donor dog? |
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Definition
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Term
A compatible crossmatch will guarentee RBC survival before transfusion.
True or False? |
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Definition
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Term
Blood product should not be microwaved or re-chilled after thawing.
True or False? |
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Definition
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Term
Why should a transfusion be completed within 4 hours? |
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Definition
To prevent bacterial contamination |
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Term
Why should blood products be filtered before administration? |
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Definition
TO prevent thromboembolism
the pore size should be narrowed to 170-260 microns |
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Term
What significant factor predisposes animals for secondary bacterial infections of the nasal passage, sinuses, and middle ear? |
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Definition
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Term
Where is mucoid nasal discharge produced? |
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Definition
GOBLET cells in the epithelium of the nasal cavity |
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Term
What is the most likely differential for epistaxis? |
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Definition
serious, underlying coagulation or platelet abnormality |
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Term
What is the most common virus of the nasal cavity in cats? |
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Definition
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Term
Which of the following is NOT a common clinical sign of bacterial rhinitis?
A) nasal turbinate destruction
B) facial deformities
C) neurologic signs
D) severe weight loss
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Definition
Answer: A) nasal turbinate destruction
it very rarely occurs |
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Term
What bacteria is most commonly cultured from nasal discharge of cats? |
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Definition
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Term
What bacteria is most commonly cultured from nasal discharge of dogs?
|
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Definition
Escherichia coli
Bacillus
Neisseria
Staphylococcus
Streptococcus |
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Term
There is often normal bacterial flora in the nasal cavity, what would be indicitive of a significant culture? |
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Definition
Heavy growth of a single colony
Isolates obtained from caudal nasal cavity (surgical) |
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Term
What is the most important principle in treating bacterial rhinitis? |
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Definition
Treating the underlying/primary disease
*antimicrobial therapy will only result in temporary resolution of clinical signs* |
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Term
In cases of mild pleural effusions, tachypenia may be the only change in ventilation. What are the clinical signs of severe pleural effusions? |
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Definition
increased inspiratory effort
restrictive breathing
orthopnea (shortness of breath in recumbancy) |
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Term
Although the placement of a chest tube provides immediate relief of pneumothorax, what should be done once the patient is stable? |
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Definition
Thoracic radiographs
this will evaluate the extent of the pneumothorax, and pulmonary parechymal disease/damage |
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Term
What is the most common cause of pneumothorax in the cat and dog? |
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Definition
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Term
What is an open pneumothorax? |
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Definition
When the pleural cavity is open to air.
Will cause suction on inspiration |
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Term
What is a close penumothorax, and how are the formed? |
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Definition
This is when the thoracic wall remains intact.
These are caused when the thorax is compressed against a closed glottis resulting in tears in the lung parenchyma |
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Term
What is the cause of primary spontaneous pneumothorax? |
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Definition
Pulmonary collagen defect
it is uncommon in cats and dogs |
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Term
Which side of the thorax are secondary spontaneous pneumothorax more likely to occur? |
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Definition
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Term
What are some common clinical signs associated with pneumothorax? |
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Definition
Tachypnea
anxiety
cyanosis
pale mucous membranes
open mouth breathing |
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Term
What radiographic findings are associated with pneumothorax? |
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Definition
increased width of air-filled pleural space
partial lung lobe collapse
retraction of lobe margins from chest wall |
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Term
Are atelectatic long lobes are radiolucent or radiopaque? |
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Definition
Radiopaque - especially compared to the radiolucent air-filled normal lung |
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Term
Primary spontaneous pneumothorax has rare radiographic lesions that but when found they are definitive and no further diagnostic testing is required. What are those definitive lesions? |
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Definition
Bullae, cavitary lesions or BLEBS on the lungs |
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Term
How do small pulmonary lacerations incriminated in causing pneumothorax need to be treated? |
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Definition
They dont, they will often form a seal within 48 hours and the air in the pleural space will be reabsorbed |
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Term
At what magnitude of pneumothorax should thoracocentesis be considered?
Where should the needle be placed? |
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Definition
When more than 20-30% of the chest cavity is filled with air - thoracocentesis should be considered.
The needle should be placed between the 7th and 9th ribs and up 2/3 of the chest wall from the sternum |
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Term
What are the benefits of preforming a tube thoracostomy over a needle thoracocentesis? |
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Definition
tube thoracostomy:
allows for more frequent/constant evculation of pleural air
decreased risk of lung laceration
drain acts are foreign body = increased fibrin |
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Term
A tube thoracostomy drain acts as a foreign body, how is that useful in the treatment of pneumothorax? |
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Definition
Increases fibrin production allowing it to seal up better |
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Term
In cases of pneumothorax, when should exploratory thoracotomy be preformed? |
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Definition
If the pneumothorax persists for more than 48 hours, or if there is radiographic evidence of the source of air leakage |
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Term
What type of incision should be made when preforming an exploratory thoracotomy? |
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Definition
median sternotomy incision - allows examination of both hemithoraces |
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Term
How is tetracycline used to help treat pneumothorax? |
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Definition
powered tetracycline and saline mixture can be used in a hemithorax to cause pleurodesis. Tetracycline acts as a sclerosing agents that irritates causing the visceral and parietal pleura to adhere to one another = air evacuated from pleural space.
THIS IS PAINFUL becuase of low pH of solution |
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Term
When an animal with suspected pleural effusion is in severe distress, what is the diagnostic procedure to preform? |
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Definition
Thoracocentesis and emergency therapy (like oxygen supplementation)
Before testing! |
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Term
What is pleural fluid?
Where is it produced?
What is the normal volume and composition? |
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Definition
Pleural fluid is an ultrafiltrate of plasma
Secreted by meothelial cells
volume = 0.1-0.2 ml/kg
composed of less than 3,000 cells/ul |
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Term
When are clinical signs associated with pleural effusions evident? |
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Definition
Not until accumulations of pleural fluid has reached 60 ml/kg body weight. This is from the normal 0.1/0.2 ml/kg |
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Term
What can cause pleural effusions? |
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Definition
Chronic protein loss from renal disease
Lack of protein from severe hepatic disease
heart failure
neoplasia
septoc effusions
aseptic inflammatory effusion (FIP)
hemorrhagic - from trauma |
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Term
What radiographic findings will give a confirmed diagnosis of pleural effusions? |
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Definition
One or more of the following:
1) presence of interlobar fissure lines
2) rounding of lung margins
3) separation of lung lobe borders away from thoracic wall
4) scalloping of lung lobe margins dorsal to sternum
5) blurring of caridac silhouette
6) widening of mediastinum |
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Term
Which radiographic views are most helpful for recognizing small amounts of pleural fluid? |
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Definition
lateral recumbent and ventrodorsal views |
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Term
When preforming thoracocentesis, the needle should be introduced at the cranial or caudal border of the rib?
Why? |
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Definition
Cranial
to avoid intercostal vessels and nerves (which are caudal) |
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Term
When collecting samples from a thoracocentesis, which diagnostic tests should then be run? |
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Definition
cytology
physical and biochemical characterisitics
aerobic and anaerobic culture
fungal culture |
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Term
What is the cause of pure transudative pleural effusions? |
|
Definition
hypoalbuminemia
from decreased production:
- intestinal malabsorption/maldigestion
- malnutrition
- chronic liver disease
From increase loss
- glomerulonephropathies
- hemorrhage
- exudative inflammatory diseases
- protein losing enteropathies |
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Term
When there are hemorrhagic pleural effusions, the packed cell volume and cell counts of the fluid is:
A) higher than peripheral blood
B) similar to peripheral blood
C) lower than peripheral blood |
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Definition
Answer: B) similar to peripheral blood |
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Term
What is the characterisitic finding of inflammatory pleural effusions? |
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Definition
Presence of neutrophils
will be a cloudy fluid with varied coloration- high protein content, high specific gravity |
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Term
What are the most common isolates in cases of inflammatory pleural effusions in the dog and cat? |
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Definition
ANAEROBES
Felines:
- Bacteroides, Fusobacterium
Canines:
- Fusobacterium, Actinomyces, Nocardia, Streptococcus
**Aerobes are less common, but Pasteurella multocida is most common aerobe in cats and dogs** |
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Term
Why is it important to send both aerobic and anaerobic cultures when sampling pleural effusions? |
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Definition
Because in the cat and dog - ANAEROBIC isolates are more common |
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Term
What is the cause of obstructive pleural effusions? |
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Definition
increased hydrostatic pressye in blood vessels/lymph that drain to the pleural cavity.
compression from masses/neoplasia
systemic venous hypertension
*****Congestive heart failure *******
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Term
What is the most common cause of obstructive pleural effusions in the cat? |
|
Definition
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Term
What are chylous pleural effusions? |
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Definition
Modified tranudates or exudates - milky appearance
mostly lymphocytes and neutrophils |
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Term
What is essential regarding treatment of pleural effusions? |
|
Definition
Preventing fluid accumulation by INCREASING SERUM PROTEIN CONCENTRATION |
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Term
What are the most common causes of hemothorax? |
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Definition
Trauma
coagulation defects
neoplastic processes (eroding through major blood vessels)
*self-limiting unless coagulopathy*
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Term
The use of continuous water seal suction is considered the key to complete and rapid removal od infected pleural exudate.
True or False? |
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Definition
TRUE
And patients will not clinically improve until effective drainage is established |
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Term
What are the criteria for discontinuing drainage of a pleural effusion? |
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Definition
1) radiographic evidence showing complete evacuation of pleural fluid for 48 hours
2) negative gram stain
3) production of less than 50 ml(k9)/15 ml(feline) of non-purulent fluid in 24 hours |
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Term
Treatment of pyothorax is most successful when thoracocentesis and antibiotic therapy are administered.
True or False? |
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Definition
FALSE
Treatment of pyothorax include tube thoracostomy with water seal drainage and long-term antibiotic therapy.
Mortality of 40-80% is noted with thoracocentesis and abx alone |
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Term
How would diagnose a chylothorax? |
|
Definition
thoracocentesis and sample collection:
- ether clearance test (chylomicrons dissolve in ether and fluid becomes clear)
- measure and compare cholesterol and triglyceride levels of serum and pleural fluid |
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Term
What is the treatment for chylothorax? |
|
Definition
Medical managment:
- thoracocentesis
- dietary management (low fat and short/med chian triglyceride supplementation)
- benzopyrone drugs (Rutin - reduce effusions)
SURGICAL THERAPY:
- ligation of leaking thoracic ducts
- pleurodesis (poor ) |
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Term
What is the most common cause of neoplastic pleural effusions in the cat? |
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Definition
thymic lymphoma
mestheliomas
metastatic carcinomas
hemangiosarcomas |
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Term
When would a tonsillectomy be warranted in the dog? |
|
Definition
With chronic or recurrent tonsillitis that is unresponsive to antibiotic therapy or in cases where tonsillar enlargement results in upper airflow obstruction |
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Term
Bacterial culture should be preformed to determine the proper antibiotic use when treating tonsillitis.
True or False? |
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Definition
FALSE
tonsils will have organisms that would be found in health OR infection, so just start the animal on amoxicillin or another broad spectrum antibiotic |
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Term
What are the post-operative care instructions for a dog that has had a tonsillectomy? |
|
Definition
Monitor during recovery to watch for aspiration
no food for 24 hours
soft foods for 2 weeks
corticosteroids and broad spectrum abx for 7 days
(healing is complete within 10-14 days) |
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Term
Signs of respiratory distress originating from the extrathoracic trachea will result in inspiratory or expiratory signs? |
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Definition
Inspiratory distress signs |
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Term
Signs of respiratory distress originating from the intrathoracic trachea will result in inspiratory or expiratory signs?
|
|
Definition
Expiratory distress signs |
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|
Term
What parasite may cause a mass at the bifurcation of the trachea? |
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Definition
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Term
Tracheobronchial collapse is classified as:
A) Small airway disease
B) Large airway disease
C) Both small and large airway disease |
|
Definition
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Term
What is the most common signalment of a dog with tracheobronchial collapse? |
|
Definition
middle-aged or older
SMALL dogs (less than 10 kg)
BREED PREDILICTION:
Toy and mini poodles, chihuahuas, yorkies, pomeranians |
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Term
In tracheobronchial collapse which distinct change is noticed in the tracheal cartilage? |
|
Definition
loss of chondroitin sulfate, glycosaminoglycan, and calcium
may also have more fibrous-fribrocartilagenous tissue |
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Term
Chronic valvular disease predisposes to airway collapse.
True or false? |
|
Definition
TRUE
volume overload - upward displacement of the left mainstem bronchus |
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Term
What can be hear an ascultation of a dog with tracheobronchial collapse? |
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Definition
crackles, wheezes, and often a loud snapping sound at the end of expiration |
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|
Term
What would diagnose a dog with tracheobronchial collapse? |
|
Definition
Physical exam
Signalment
GOOD THORACIC XRAYS |
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|
Term
What is the treatment for tracheobronchial collapse? |
|
Definition
There is NO CURATIVE TREATMENT
Medical:
- weight reduction
- corticosteroids
- antitussives (hycodan, lomotil)
- treat for endocartitis if present
- bronchodilators (theophylline, aminophylline)
Surgical |
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