clinical chemistry Exam 1- HTC Questions & Answers 2023/2024
Blood received in the lab for blood gas analysis must meet which requirement? - ANSWER-on ice, no clots, no air bubbles
A specimen collected for plasma glucose analysis, sodium fluoride: - ANSWER-inhibits glycoysis
results 6 hour...
clinical chemistry Exam 1- HTC Questions & Answers 2023/2024
Blood received in the lab for blood gas analysis must meet which requirement? - ANSWER-on ice, no clots, no air bubbles
A specimen collected for plasma glucose analysis, sodium fluoride: - ANSWER-inhibits glycoysis
results 6 hours after meal: triglycerides 260mg Cholesterol 120mg - ANSWER-Cholesterol is normal >200 Triglycerides is high Should fast 10-14 hrs
blood collected in a serum separator tube on a patient who has been fasting since midnight. time collected was 7am. the lab test which should be recollected is? - ANSWER-triglycerides
Arterial blood that is collected in a heparinized syringe but exposed too room air would be most consistent with the changes of the following specimens.. - ANSWER-PO2 elevated
PCO2 decreased
pH elevated
Unless blood gas measurements are made immediately after sampling, in vitro glycolysis of the blood causes a .. - ANSWER-pH decrease
PCO2 increase
Calculate absorbance given the percent transmittance (%T) of a solution - ANSWER-2-log(%T)
method is susceptible to the solvent displacing effect that results in falsely decreased electrolyte values -
ANSWER-indirect ion-selective electrodes To detect barbituate abuse when analysis urine specimens all drug spots (including the standards) had migrated with the solvent front. The most probable cause would be.. - ANSWER-incorrect aqueous to nonaqueous solvent mixture
What is the proper ph for the buffered solution used to perform serum protein electrophoresis - ANSWER-8.6
The buffer pH most effective at allowing amphoyteric proteins to migrate toward the cathode in an electrophoretic system would be.. - ANSWER-4.5
Hydrogen ion concentration(pH) in blood is usually determined by means of which of the following electrodes - ANSWER-glass
An automated method for measuring chloride which generates silver ions in the reaction is? - ANSWER-
coulometry
coulometry is often used to measure - ANSWER-chloride in sweat
in a pH meter reference electrodes may include - ANSWER-silver-silver chloride
Most automated blood gas analyzers directly measure - ANSWER-ph,PCO2, and PO2
Blood PCO2 may be measured by - ANSWER-a self contained potentiometric electrode
valinomycin enhanced the selectivity of the electrode used to quantitate - ANSWER-potassium
which blood gas electrode is composed of silver/silver chord reference electrode and glass - ANSWER-
PCO2
which of the following calcium procedures utilizes lanthanum chord to eliminate interfering substances - ANSWER-atomic absorption spectrophotometry
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