Hematology Flashcards
Best initial test for anemia?
CBC with peripheral smear
What are the other initial tests for anemia?
Reticulocyte count, haptoglobin, LDH, total bilirubin, TSH with T4, B12/folate, iron studies
What is the best initial diagnostic test for iron deficiency anemia?
Iron studies-
- Low ferritin
- High TIBC
- Low Fe
- Low Fe sat
- Elevated RDW
What is the best initial therapy for iron deficiency anemia?
ferrous sulfate orally
What is the presentation of patients with anemia of chronic disease?
patients with RA, ESRD, any chronic disease
What is the best initial diagnostic test for anemia of chronic disease?
Iron Studies-
- High ferritin
- Low TIBC
- Low Fe
- Normal/ Fe sat
What is the best initial therapy for anemia of chronic disease?
Correct underlying disease
How does sideroblastic anemia present?
alcoholism, isoniazid use, lead exposure
What is the best initial test for sideroblastic anemia?
Iron studies- shows high Fe
What is the most accurate test for sideroblastic anemia?
Prussian blue stain
What is the best initial therapy for sideroblastic anemia?
Remove the toxin exposure, possibly pyridoxine
How does Vitamin B12 deficiency present?
Macrocytic anemia, neurologic findings(peripheral neuropathy), smooth tongue
How does folate deficiency present?
Same as B12 deficiency without the neurologic problems
What is the best test for macrocytic anemias?
CBC with peripheral blood smear(look for hypersegmented (>5 segments) neutrophils)
What else should be ordered in the CCS portion for megaloblastic anemia?
Biliubin and LDH levels- elevated
Reticulocyte- low
What is the most accurate test for megaloblastic anemia?
Low B12(for B12 deficiency) and folate levels(for folate deficiency)
What is the next best test to confirm B12 deficiency etiology after finding a low B12 or elevated methylmalonic acid ?
Anti-parietal cell antibodies and anti-intrinsic factor antibodies
What is the treatment for B12 and folate deficiencies?
replacement
What is seen on the labs for hemolytic anemia with regards to the following?
Indirect bilirubin, reticulocyte count, LDH, haptoglobin
Indirect bilirubin- elevated
reticulocyte count- elevated
LDH- elevated
haptoglobin- decreased
In cases of hemolysis on the CCS exam, what should you order?
Peripheral smear, LDH, bilirubin level, reticulocyte count, haptoglobin
What must you do when there is a patient with sickle cell disease?
complete physical exam
What is the next best step when a diagnosis of sickle cell disease is made?
Give oxygen, hydration, and pain meds
If fever is present with sickle cell disease, what is the next step?
give ceftriaxone, levofloxacin, or moxifloxacin
fever is an emergency because they functionally have no spleen
When is exchange transfusion the answer for a patient with sickle cell disease?
- when having visual changes from retinal infarction
- pulmonary infarction leading to pleuritic pain
- priapism
- stroke
If a sickle cell patient has a sudden drop in Hct, what is the diagnosis?
Parvovirus B19 or folate deficiency
What is the diagnostic test for autoimmune hemolysis?
LDH, Indirect bilirubin, reticulocyte levels will be increased. haptoglobin will be decreased
What is the most accurate test for hemolysis?
Coombs test
What is the best initial therapy for hemolysis?
steroids; if case describes recurrent hemolysis, splenectomy is the most effective therapy
If severe hemolysis is unresponsive to repeated tranfusions and prednisone, what is the next step?
IV IgG
What history do patients with cold induced hemolysis have?
History of mycoplasma or EBV
What are the diagnostic tests for cold induced hemolysis?
Coombs positive. complement test positive
What is the treatment for cold induced hemolysis?
If no response to steroids, splenectomy, or IVIG…..
Treat with rituximab
How does G6PD Deficiency present?
sudden onset of hemolysis, X-linked, males, most commonly associated with ongoing infection, oxidizing drugs(sulfa, primaquine)
What is the best initial test for G6PDD?
Heinz body test, bite cells
What is the most accurate test for G6PDD?
G6PD level(only test after 2 months have passed from initial attack)
What is the treatment for G6PDD?
Avoid oxidant stress
How does hereditary spherocytosis present?
Recurrent hemolysis, splenomegaly, gallstones, increased MCHC
How do you diagnose hereditary spherocytosis?
osmotic fragility test(most accurate)
What is the treatment for hereditary spherocytosis?
splenectomy
What are HUS/TTP associated with?
E. coli 0157:H7 infection with HUS, ticlopidine is associated with TTP
What is the HUS triad?
ART
Autoimmune hemolysis (intravasular hemolysis)
Renal failure (Elevate BUN and creatinine)
Thrombocytopenia
What is the TTP pentad?
FAT RN Fever Autoimmune hemolysis Thrombocytopenia Renal Failure Neuro abnormalitites