Shared Flashcard Set

Details

Internal Medicine
Respiratory & Hematology
107
Veterinary Medicine
Graduate
09/15/2011

Additional Veterinary Medicine Flashcards

 


 

Cards

Term
When is serologic testing used in diagnosing respiratory disease?
Definition
Primarily with fungal infections 
Term
What are the common fungal infections that cause respiratory disease?
Definition

Cryptococcus neoformans 

Blastomyces spp

Histoplasma spp

Aspergilus spp

Term
When would you use a nasal cavity culture?
Definition

You shouldn't - they are often not helpful diagnostically 

there can be laboratory contaminants - only pure samples cultures are relevant 

Term
Where does nasal secretions originate from?
Definition

Epithelium 

Submucosal glands 

anterior nasal glands 

Term
In which direction do normal nasal secretions flow?
Definition
Caudally 
Term
What is the most common nasal tumor?
Definition
Adenocarcinoma
Term
What are the common clinical presentations of allergic rhinitis?
Definition

sneezing - periodic 

seasonality 

normal TPR

 

Term

What are the causes of viral rhinitis?

 

Definition
Herpes and calicivirus 
Term
What would be a differential when you notice nasaland/or facial deformities?
Definition
Cryptococcus 
Term
What is the treatment for naso-pharyngeal polyps?
Definition

SURGERY

 

Term
What are some problems with surgically removing naso-pharyngeal polyps?
Definition
HORNERS syndrome - which usually resolves in a few weeks 
Term

All patients with bacterial rhinitis have a primary, chronic inflammatory disease involing the nasal passages.

True or false?

Definition

TRUE 

things like foreign bodies, aspiration pneumonia

without resolving the underlying problem they will not ever truely clear up 

Term
What is a leptocyte?
Definition

It is a flat, pale, poorly staining red blood cell

associated with chronic blood loss/iron deficiency anemia 

Term
Why may animals that are chronically bleeding into pleural, peritoneum, or pericardial space not show anemia initially? 
Definition
They can auto-transfuse - they reabsorb the RBC within 1-2 weeks 
Term

Hemoglobinuria and hemoglobinemia will be found with which?

A) intravascular hemolysis 

B) extravascular hemolysis 

C) Both 

Definition

Intravascular hemolysis 

this is where port wine colored urine will be seen 

 

Term
What is a spherocyte?
Definition
A RBC that has undergone partial phagocytosis leaking it without the normal central pallor that is seen in normal RBCs 
Term
Which antibody is most associated in auto-agglutination ?
Definition

IgM 

because it is a pentamer and will hold 5 

this makes it easier to bundle together 

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 

Definition

A) 

If the animal is already positive for auto-agglutination 

then there is no reason to run a coombs test 

 

Term
What is Evan's Syndrome?
Definition

Immune destruction of platelets in addition to IMHA 

this decreases the prognosis 

Term
Why may patients with IMHA have elevated levels of hepatic enzymes?
Definition
Hepatocyte hypoxia 
Term
What changes may been seen in the serum biochemistry with IMHA?
Definition

Elevated globulins (immune response) 

Elevated hepatic enzymes (hepatocyte ypoxia) 

Cholestasis 

Pre-renal azotemia 

Rarey - acute renal failure (from ischemia, DIC, sepsis) 

 

Term
What type of reaction is IMHA?
Definition
Type II hypersensitivity 
Term
In what breeds is IMHA commonly found?
Definition

COCKER SPANIEL

Poodle

Irish Setter 

Old English Setter 

Term
Which antibody activates complement more efficiency: IgG or IgM?
Definition

IgM 

it is a pentamer so it can grab onto more 

Term
What are some of the inherited causes of IMHA?
Definition

PK deficiency 

Phosphofructokinase deficiency 

Chondrodysplasia/anemia

Nonspherocytic hemolytic anemia 

Term
What is neonatal isoerythrolysis?
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 

Term
How is primary IMHA definitively diagnosed?
Definition
It's not - Other causes of IMHA are ruled out - leaving primary as the reason
Term
What are the four principles of treating IMHA?
Definition

Provide supportive care (hydration, diuresis) 

Treat tissue hypoxia (blood transfusion) 

Prevent hemolysis with immunosuppressive therapy 

(prednisone/prednisolone/dexamethasone)

Deter formation of thrombi 

 

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?

Definition

FALSE 

prophylactic antibiotics are not indicated 

Term

Which of the following is the primary treatment for IMHA?

A) Broad spectrum antibiotics 

B) Prednisone

C) Azathioprine 

D) Splenectomy 

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 

Term
What is the dosage of aspirin in managment of thrombi in IMHA?
Definition
Ultra LOW dose - 0.5 mg/kg 
Term
What is what of the main reasons for relapse of IMHA?
Definition
when treating - the drugs are not tapered off slowly enough and the animal ends up relapsing 
Term
What are the most clinically important Canine blood groups?
Definition
DEA 1.1 and 1.2 
Term
What is the difference between typing of cat and dog blood?
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)!!!
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

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 

Term
Why are greyhounds a good choice for a blood donor dog?
Definition
Most lack the DEA 1.1 
Term

A compatible crossmatch will guarentee RBC survival before transfusion.

True or False?

Definition
FALSE !
Term

Blood product should not be microwaved or re-chilled after thawing.

True or False?

Definition
TRUE 
Term
Why should a transfusion be completed within 4 hours?
Definition
To prevent bacterial contamination 
Term
Why should blood products be filtered before administration?
Definition

TO prevent thromboembolism 

the pore size should be narrowed to 170-260 microns

Term
What significant factor predisposes animals for secondary bacterial infections of the nasal passage, sinuses, and middle ear?
Definition
VIRAL URIs
Term
Where is mucoid nasal discharge produced?
Definition
GOBLET cells in the epithelium of the nasal cavity 
Term
What is the most likely differential for epistaxis?
Definition
serious, underlying coagulation or platelet abnormality 
Term
What is the most common virus of the nasal cavity in cats?
Definition
Herpesvirus 
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

 

Definition

Answer: A) nasal turbinate destruction 

it very rarely occurs 

Term
What bacteria is most commonly cultured from nasal discharge of cats?
Definition
Pasteurella spp.
Term

What bacteria is most commonly cultured from nasal discharge of dogs?

Definition

Escherichia coli

Bacillus 

Neisseria

Staphylococcus 

Streptococcus 

Term
There is often normal bacterial flora in the nasal cavity, what would be indicitive of a significant culture?
Definition

Heavy growth of a single colony

Isolates obtained from caudal nasal cavity (surgical)

Term
What is the most important principle in treating bacterial rhinitis?
Definition

Treating the underlying/primary disease 

*antimicrobial therapy will only result in temporary resolution of clinical signs*

Term
In cases of mild pleural effusions, tachypenia may be the only change in ventilation. What are the clinical signs of severe pleural effusions?
Definition

increased inspiratory effort

restrictive breathing

orthopnea (shortness of breath in recumbancy) 

Term
Although the placement of a chest tube provides immediate relief of pneumothorax, what should be done once the patient is stable?
Definition

Thoracic radiographs 

this will evaluate the extent of the pneumothorax, and pulmonary parechymal disease/damage

Term
What is the most common cause of pneumothorax in the cat and dog?
Definition
penetrating trauma
Term
What is an open pneumothorax?
Definition

When the pleural cavity is open to air.

Will cause suction on inspiration

Term
What is a close penumothorax, and how are the formed?
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

Term
What is the cause of primary spontaneous pneumothorax?
Definition

Pulmonary collagen defect 

it is uncommon in cats and dogs 

Term
Which side of the thorax are secondary spontaneous pneumothorax more likely to occur?
Definition
RIGHT side 
Term
What are some common clinical signs associated with pneumothorax?
Definition

Tachypnea

anxiety 

cyanosis 

pale mucous membranes 

open mouth breathing

Term
What radiographic findings are associated with pneumothorax?
Definition

increased width of air-filled pleural space

partial lung lobe collapse

retraction of lobe margins from chest wall

Term
Are atelectatic long lobes are radiolucent or radiopaque?
Definition
Radiopaque - especially compared to the radiolucent air-filled normal lung
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?
Definition
Bullae, cavitary lesions or BLEBS on the lungs 
Term
How do small pulmonary lacerations incriminated in causing pneumothorax need to be treated?
Definition
They dont, they will often form a seal within 48 hours and the air in the pleural space will be reabsorbed
Term

At what magnitude of pneumothorax should thoracocentesis be considered?

Where should the needle be placed?

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

Term
What are the benefits of preforming a tube thoracostomy over a needle thoracocentesis?
Definition

tube thoracostomy:

allows for more frequent/constant evculation of pleural air

decreased risk of lung laceration 

drain acts are foreign body = increased fibrin 

Term
A tube thoracostomy drain acts as a foreign body, how is that useful in the treatment of pneumothorax?
Definition
Increases fibrin production allowing it to seal up better 
Term
In cases of pneumothorax, when should exploratory thoracotomy be preformed?
Definition
If the pneumothorax persists for more than 48 hours, or if there is radiographic evidence of the source of air leakage
Term
What type of incision should be made when preforming an exploratory thoracotomy?
Definition
median sternotomy incision - allows examination of both hemithoraces
Term
How is tetracycline used to help treat pneumothorax?
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

Term
When an animal with suspected pleural effusion is in severe distress, what is the diagnostic procedure to preform?
Definition

Thoracocentesis and emergency therapy (like oxygen supplementation) 

Before testing! 

Term

What is pleural fluid?

Where is it produced?

What is the normal volume and composition?

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 

Term
When are clinical signs associated with pleural effusions evident?
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
Term
What can cause pleural effusions?
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

Term
What radiographic findings will give a confirmed diagnosis of pleural effusions?
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 

Term
Which radiographic views are most helpful for recognizing small amounts of pleural fluid?
Definition
lateral recumbent and ventrodorsal views
Term

When preforming thoracocentesis, the needle should be introduced at the cranial or caudal border of the rib?

Why?

Definition

Cranial 

to avoid intercostal vessels and nerves (which are caudal)

Term
When collecting samples from a thoracocentesis, which diagnostic tests should then be run?
Definition

cytology 

physical and biochemical characterisitics 

aerobic and anaerobic culture 

fungal culture

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

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 

Definition
Answer: B) similar to peripheral blood 
Term
What is the characterisitic finding of inflammatory pleural effusions?
Definition

Presence of neutrophils

will be a cloudy fluid with varied coloration- high protein content, high specific gravity 

Term
What are the most common isolates in cases of inflammatory pleural effusions in the dog and cat?
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**

Term
Why is it important to send both aerobic and anaerobic cultures when sampling pleural effusions?
Definition
Because in the cat and dog - ANAEROBIC isolates are more common
Term
What is the cause of obstructive pleural effusions?
Definition

increased hydrostatic pressye in blood vessels/lymph that drain to the pleural cavity.

compression from masses/neoplasia

systemic venous hypertension 

*****Congestive heart failure *******

 

Term
What is the most common cause of obstructive pleural effusions in the cat?
Definition

CARDIOMYOPATHY 

 

Term
What are chylous pleural effusions?
Definition

Modified tranudates or exudates - milky appearance 

mostly lymphocytes and neutrophils 

Term
What is essential regarding treatment of pleural effusions?
Definition
Preventing fluid accumulation by INCREASING SERUM PROTEIN CONCENTRATION
Term
What are the most common causes of hemothorax?
Definition

Trauma 

coagulation defects 

neoplastic processes (eroding through major blood vessels)

*self-limiting unless coagulopathy*

 

Term

The use of continuous water seal suction is considered the key to complete and rapid removal od infected pleural exudate.

True or False?

Definition

TRUE 

And patients will not clinically improve until effective drainage is established

Term
What are the criteria for discontinuing drainage of a pleural effusion?
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 

Term

Treatment of pyothorax is most successful when thoracocentesis and antibiotic therapy are administered.

True or False?

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

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 

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 ) 

Term
What is the most common cause of neoplastic pleural effusions in the cat?
Definition

thymic lymphoma 

mestheliomas

metastatic carcinomas

hemangiosarcomas

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 
Term

Bacterial culture should be preformed to determine the proper antibiotic use when treating tonsillitis.

True or False?

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 

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) 

Term
Signs of respiratory distress originating from the extrathoracic trachea will result in inspiratory or expiratory  signs?
Definition
Inspiratory distress signs 
Term

Signs of respiratory distress originating from the intrathoracic trachea will result in inspiratory or expiratory signs?

Definition
Expiratory distress signs 
Term
What parasite may cause a mass at the bifurcation of the trachea?
Definition
Filaroides osleri
Term

Tracheobronchial collapse is classified as:

A) Small airway disease 

B) Large airway disease 

C) Both small and large airway disease 

Definition
Answer: C) both 
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

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

Term

Chronic valvular disease predisposes to airway collapse.

True or false?

Definition

TRUE

volume overload - upward displacement of the left mainstem bronchus 

Term
What can be hear an ascultation of a dog with tracheobronchial collapse?
Definition
crackles, wheezes, and often a loud snapping sound at the end of expiration 
Term
What would diagnose a dog with tracheobronchial collapse?
Definition

Physical exam 

Signalment 

GOOD THORACIC XRAYS

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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