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ClinChem2 test 2

Post review clincal chemistry practice test for DelTech Owens

What process gives the most accurate analysis of a lipemic sample? Direct ISE
In what form does most of the CO2 in the blood take? Bicarbonate Ion / HCO3
Bicarbonate leaves RBCs and enters the plasma. It is exchanged with what other electrolyte when this occurs? Chloride (chloride shift)
The primary cation in ECF is? sodium
If visible hemolysis is seen in a sample, which electrolyte will be most effected? potassium
Hyponatremia CANNOT be caused by ? hypomagnesemia
The main ICF cation is ? potassium
Hypokalemia CANNOT be caused by ? acidosis
Hyperkalemia CANNOT be caused by ? alkalosis
What is the biggest difference between direct ISE and indirect ISE? C/dilution
Hemolysis will not increase which electrolyte? sodium
T or F: Is chloride the major ECF anion? True
Which will increase the most in the serum if blood has hemolyzed? C/potassium and phosphate
T or F: Blood is drawn into a vaccutainer. (And may have hemolized.) This will decrease potassium? False
The membrane substance for the potassium ion electrode is ? Valinomycin
What is the anion gap formula? AG = (Na + K) – (Cl + HCO3)
What's the method of choice for measuring serum ionized calcium? B/ionselective electrode
Anticoag of choice for ABG testing is ? D/lithium heparin
What's the ratio of carbonic acid to bicarb? 1-20
Patient's ABG and stats are consistent with what diagnosis? pH-7.27 CO2-75 HCO3-37 Respiratory acidosis with compensation
Patient's ABG and stats are consistent with what diagnosis? ph-7.48 CO2-52 HCO3-38 Compensated metabolic alkalosis
In patients circulatory system, bicarb has left the RBCs and entered the plasma. It will be exchanged with ? C/chloride
In plasma, too much bicarb with no change in concentration of CO2 from normal will result in ? metabolic alkalosis
Which lab findings are consistent with diabetic ketoacidosis? Elevated blood sugar, low pH, ketone bodies present
Which is an acceptable sample for acid bad disturbance analysis? arterial blood kept on ice
Potentiometric measurement of hydrogen ion concentration uses what reference electrode? A/silver silver chloride
Which electrode is amperimetric? B/PO2
Lab results for ABG are compatible with which diagnosis? ph-7.23 CO2-79 HCO3-40 Respiratory acidosis
The most common cause of respiratory alkalosis is ? D/hyperventilation
Blood's normal pH range at 37C is ? 7.35-7.45
What is the H.H. equation? D - pH - pk + log (base/acid)
ABG specimen from 8:30 AM doesn't arrive in the lab until 11:00AM. What should you do? D/ask for new specimen
ER patient has metabolic alkalosis. What stats would be consistent with that diagnosis? D/high CO2, high HCo3
ABG was sent to the lab. What has been altered? A/p/h increase
In iron def. anemia, saturation of transferrin would be high, normal, or low? Low
In what form is iron stored in the blood? A/ferritin B/hemosiderin
An increased tranferrin saturation perc. would be expected in ? A/hemochromatosis C/iron poisoning
TIBC measures what? B/transferrin
Decreased serum iron and increased TIBC are associated with what? B/iron def anemia
Another patient's blood was drawn at 8:00am. The results are due to? D/time specimen was drawn
Most sensitive indicator of iron def is ? C/ferritin (but question was debated by the class)
Which statement is true of iron def? C/normal ferritin rules out iron def (question may get deleted from test)
Which step is NOT needed to determine iron levels? B/protein precipitation
The majority of iron in WHOLE blood is stored where? A/hemoglobin
Name 3 places where iron gets stored in the body. 1. liver 2. bone marrow 3. spleen
What is the normal range for bicarbonate/HCO3? 22-26 mEq/L and mmol/L
What is the normal range for PaCO2? 32-48 mmHg
Go here for a tutorial on how to diagnose ABGs in a way that doesn't even require you to know what you're doing. :) It actually makes understanding what ABGs are really about a lot simpler. Eventually, you won't even need to use this method.
Created by: IsaacJ



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