Anemia Flashcards
What is Anemia?
- any condition that results in a low O2 carrying capacity of blood
- NOT a diagnosis
- clinical sign of an underlying conditon
What are Clinical Signs associated with Anemia?
- low oxygenation
- lethargy
- exercise intolerant
- ADR
- inappetence => anorexia
- dehydration
- weight loss
- low blood (low RBCs)
- pale mucus membranes
- slow CRT
- increased heart rate
- fast, thready pulse
- low BP
- heart murmurs
Depending on the cause of Anemia, you may also see:
- jaundice/icterus
- extravascular hemolysis
- RBCs with abnormal surfaces
- Heinz bodies
- RBC parasites
- hemoglobinuria/ hemoglobinemia
- intravascular hemolysis
What is the Clinical Definition of Anemia?
Absolute decrease in total RBC count, PCV, HB concentration or all of the above
What does Anemia result from?
Decrease or inefficient rate of production of RBC or increased rate of destruction or loss of RBCs
What is Non-Regenerative Anemia?
- abnormal response
- NO blood loss
- lost senesent RBCs that aren’t being replaced
- no new RBCs are being made
- kidney receptors sense no Hypoxia => produce no Erythropoietin
What are the causes of Non-Regenerative Anemia?
- Kindeys
- Bone Marrow
Why are the Kidneys a cause in Non-Regenerative Anemia?
- receptors aren’t detecting hypoxia
- kidney failure: not making enough erythropoietin
Why is Bone Marrow a cause of Non-Regenerative Anemia?
not knowing to make new RBCs
What is Acute Hemmorhage?
- losses greater than 30% of total blood
- leads to shock and death
What are the clinical signs of Acute Hemmorhage?
- Pulse: rapid, weak
- BP: low, hypotension
- MM:: pale
- PCV: normal
- Blood Film: normocytic, normochromic
How long does it take for Reticulocytes to appear in blood?
72 hours
What are the causes of Acute Hemmorhage?
- Trauma
- External: HBC, dog fights
- Internal: surgical, blunt force, ruptured spleen
- Coagulation Disorders (Internal or External)
- rodenticide poisioning
- Large Bleeding Ulcers
- Bleeding Tumors
- mammary tumors (most common)
- splenic tumors
- Occult Bleeding
How does Chronic Hemmorhage show on RBC Indicies?
- hypochromic
- microcytic
- low MCV, MCHC
- blister cells (keratocytes)
What type of Anemia will Chronic Hemmorhage lead to ?
iron deficency anemia
What are the clinical signs for Chronic Hemmorhage?
- vague
- ADR
- lethargic and exercise intollerant
- inappetence / anorexia
- low water intake => dehydration
- weight loss
- HR: rapid
- BP: low
- Pulse: thready
- Heart murmur
- MM: pale
- CRT: slow
- cold extremities
What are the causes of Chronic Hemmorhages?
- Parasites
- Internal: hookworms (ancylostoma caninum), coccidia (isospora, Eimeria)
- External: fleas, ticks, lice (blood sucking)
- G.I Ulcers
- Neoplasms
- new tissue growth (tumors)
- IBD (inflammatory bowel disorder
- immune mediated/ allergies/ infections
- Overuse of blood donors (research anemia)
What are the 2 types of Hemolysis?
- Intravascular (vessels)
- Extravascular (spleen)
What are the Clinical Signs of Intravascular Hemolysis?
- hemoglobinemia
- hemoglobinuria
What are the clinical signs of Extravascular Hemolysis?
- jaundice
- icterus
- buildup of unconjugated Bilirubin. fat soluble
- splenomegaly
What clinical signs can also sometimes occur in Intravascular Hemolysis?
- jaundice
- icterus
What are the causes of Hemolysis?
- Immune mediated
- Heinz Body Anemia
- Microorganisms
- Drugs
- Water Intoxication
- Microangiopathic Hemolysis
- RBC Defects
What is IMHA?
immune mediated hemolytic anemia
What RBCs are seen in IMHA?
- spherocytes
- agglutination => hemolysis
What are the 2 causes of IMHA?
- primary
- secondary
What are the primary causes of IMHA?
-idiopathic
What are the secondary causes of IMHA?
- vaccine reactions
- drug therapy
- neoplasia
- infection
What is the “Hallmark” of IMHA?
spherocytes (spherocytosis)
What is the Coomb’s Test?
serum test used to detect auto antibodies
What are the ranges of IMHA?
mild -> moderate -> acute/severe
What is the Prognosis of IMHA?
- depends on severity of the disease
- also look at causes
What is the Mortality Rate of IMHA?
20-75%
What are the treatments for IMHA?
- steroids
- prednisolone
- cyclosporins
- fluid therapy
- blood transfusions
- heparin therapy
What are the problems of using sterioids to treat IMHA?
- may cause secondary infections
- supresses immunity
When is Heparin therapy used for IMHA?
when worried about pulmonary thromboembolism
What is Neonatal Isoeryhrolysis?
- cat drawing
- uncommon in dogs
- “fading kitten syndrome”
What is Fading Kitten Syndrome?
- bacteria, viral, fungal infections
- congenital malformations
- neonatal isoerythrolysis
What blood type are most cats?
type A
What is in Colostrum?
- antibodies
- nutrients
How many blood types are there in dogs?
19
What is the most common blood type in dogs?
DEA 1.1
What type of dogs have DEA 1.1?
- lab retievers
- golden retrievers
What type of dogs are good donors?
dogs with up ears
How do you determine Major Blood Type crossmatches?
- mix donor RBCs with recipent plasma
- look for hemolysis
How do you determine Minor Blood Type crossmatches?
- mix donor plasma with recipent RBCs
- observe for agglutination
What are the causes of Heinz Body Anemia?
- plants
- onions and garlic
- baby food
- drugs and toxins
- diseases in cats
What % of Heinz Bodies are cats born with?
5%
What type of Drugs and Toxins cause Heinz Bodies Anemia?
- acetaminophen (tylenol)
- propofol
- napthelene (moth balls)
- propylene glycol
- zinc and copper (pennies, vitamins, sunblock)
- benzocaine (topical anesthetic)
- crude oil (motor oil)
What cat diseases cause Heinz Bodies Anemia?
- hyper thyroidism
- diabetes mellitus
- lymphoma
What Microorganisms cause Hemolysis?
- protozoal blood parasites
- bacteria
- viruses
What Protozoal Blood Parasites cause Hemolysis?
- hemotropic microplasms
- babesia species
- cytauxzoon species
What type of Bacteria causes Hemolysis?
- ehrlichia canis
- leptospira species
- clostridium species
What type of Viruses cause Hemolysis?
- EIA (equine infectious anemia)
- FeLv
- FLV
What kind of Drugs cause Hemolysis?
- fenbendazole (panacur)
- heparin
What are the types of Water Intoxication that cause Hemolysis?
- psychogenic polydypsia
- fluid admin miscalculations
- water disease in cats
What is Microangiopathic Hemolysis?
turbulent / abnormal blood flow through vessels
What does Microangiopathic Hemolysis result from?
- heartworm disease (microfliaremia)
- hemangiosarcoma
- D.I.C (fibrin strands causing schistocytes)
What are the 2 types of RBC Defects?
- congenital (hereditary) membrane defects
- nutritional defiencies
What is an example of a Congenital Membrane Defect?
-congenital stomatocytosis