Exam 2 (general info) Flashcards
What method is used to determine the Hb concentration?
cyanmet-Hb method
What are the 3 structures of Hb that can affect the function of Hb?
heme | iron | polypeptide
What is MCV?
(mean corpuscular volume) | indicates RBC SIZE patient has | fempto liter (fl) (10^-15)
What is MCH?
(mean corpuscular Hb) | indicates AMOUNT Hb per EACH RBC | pictogram (pg)
What is MCHC?
(mean corpuscular Hb concentration) | indicates AMOUNT Hb per VOLUME of RBC | in %
What are the first 5 things to look for while examining a patient’s blood? (to determine if something is wrong)
increased anisocytosis | increases poikilocytosis | increased reticulocytes | presence of inclusion bodies | Hb content
What is serum bilirubin?
breakdown product of Hb from lysed RBCs
What is an elevated level of serum bilirubin indicate?
increase RBC hemolysis
How can you determine the amount of bilirubin in urine and feces?
will be darker in color
What happens to the heme after RBC lysis?
degraded and excreted out as bilirubin by the liver and spleen
What indices help with determining the category of anemia a person has?
MCH, MCV, MCHC indices
What happens if a person’s immune system creates Abs against TCBII-F?
no TCBII-F »_space;> no B12 transported into BM from intestines »_space;> delay DNA synthesis »_space;> increases size of RBCs and WBCs
What is the occult blood test used for?
check feces for internal bleeding
From the occult blood test, what does dark oreo-cookie color blood in the stool indicate?
upper GI bleeding
From the occult test, what does bright red blood in the stool suggest?
lower GI bleeding
What is an increased number of reticulocytes indicate?
increased erythropoiesis
What is polychromasia?
pre-mature RBCs released early from BM (abnormal) | bluish color in RBC compared to normal pink
What are the 6 pieces of evidence detected in peripheral blood smear that indicates increased erythropoiesis?
anisocytosis | polychromasia | basophilic stippling | Howell-Jolly bodies | nucleated RBC | reticulocytosis
What are the 5 pieces of evidence detected in bone marrow that indicates increased erythropoiesis?
increased cellularity | decreased hemosiderin | low M:E | high C:F | high reticulocyte level
How to determine for impaired erythropoiesis in the BM and peripheral blood?
opposite of the findings of increased erythropoeisis
What is transferrin?
transports iron from intestines to BM or to other places
What is ferritin?
apoferritin + iron | in intestines | H2O soluble | not detectable in stained smear or light microscope
What is hemosiderin?
ferritin aggregates | H2O INsoluble | detectable in BM smear
What do low hemosiderin and ferritin levels indicate and why?
iron deficiency anemia | don’t have iron = no Hb synthesis
What is the only way to lose iron and why?
donating blood (or bleed out) | cannot excrete metals out of body
What are the 3 molecules involved in blood cells that are toxic by themselves?
bilirubin | iron | hemoglobin
What is jaundice?
elevated bilirubin causing yellow pigmentation on skin
What are the 2 types of jaundice?
physiological = w/in 24h after delivery (normal) | pathological = asap after delivery
Which cell types are most affected by jaundice?
nerve cells
Where does bilirubin come out of?
macrophages
What neutralizes bilirubin?
albumin (plethora of these proteins in plasma)
What are the characteristics of bilirubin-albumin?
pre-hepatic bilirubin | indirect reacting | H2O INsoluble | unconjugated
What are the characteristics of bilirubin-glucuronide?
post-hepatic bilirubin | direct reacting | H2O soluble | conjugated
What are the glucuronide causes of an increased level of bilirubin-albumin?
infection | hemolytic anemia | incompatible blood transfusion | increase old RBC lysis
Where does bilirubin-glucuronide go to?
intestines
What neutralizes Hb?
haptoglobin