Clinical Chemistry II Final Exam with correct answers 2024
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Course
Clinical Chemistry II Fina
Institution
Clinical Chemistry II Fina
A patient sample for uric acid gave an absorbance reading of 0.4; the 50 mg/dL standard used in the test gave an absorbance reading of 0.1. What is the concentration of uric acid in the patient's sample in grams per deciliter? correct answers 0.2
Nanograms is ___ grams. correct answers 10^-9
...
A patient sample for uric acid gave an absorbance reading of 0.4; the 50 mg/dL
standard used in the test gave an absorbance reading of 0.1. What is the concentration
of uric acid in the patient's sample in grams per deciliter? correct answers 0.2
Nanograms is ___ grams. correct answers 10^-9
How many grams of hydrated MgSO 4 ⋅ 5 H 20 (M.W.: MgSO 4 = 119, H 20 = 18) are
required to make a 10% solution of MgS0 4? correct answers 17.6 g/dL
Which activity can spread HIV or HBV from one person to another outside of the
laboratory? correct answers sexual contact
What one item must be remembered with handling a tube of blood? correct answers At
least a lab coat and gloves must be worn.
A solution contains 4.5 grams of BaCl 2 in 400 mL. What is the normality? (mw = 208)
correct answers 0.11
Ideally, the best type of centrifuge that separates blood cells and plasma for analysis in
the clinical laboratory is: correct answers A temperature-controlled centrifuge with
spinning buckets that holds 5-10 mL blood tubes
What is the molarity (M) of a 4% solution of sodium hydroxide (NaOH)? M.W: Na = 23,
O = 16, H = 1. correct answers 1.0 M
Which of the following has the highest incidence of infectious risk in the clinical
laboratory? correct answers Hepatitis
Face masks and protective eyewear are designed to offer protection from: correct
answers mucous membrane contact
Which of the following procedures is most basic and effective in preventing the spread
of infectious diseases in the hospital environment? correct answers washing hands
between each patient contact
3 mg/dL is equivalent to ______ grams per liter. correct answers 0.03
Universal Precautions should be observed when working with: correct answers all
patients
,Diurnal variation is a term that refers to: correct answers Time of day of specimen
collection
What is AIDS? correct answers a virus
Which of the following statements describes optimal conditions for transport, handling,
and storage of blood specimens for clinical chemistry testing? correct answers
Specimen brought to lab immediately, permitted to clot, serum separated and tested as
soon as possible
How many millimoles of NaCl are contained in 300 mL of a 4M solution? (mw = 58.5)
correct answers 1200
Which of the following statements is NOT TRUE of capillary blood? correct answers Is
more similar to venous than arterial blood for concentrations of analytes
The tech in chemistry mixes 1 mL of diluent with 1mL of sample to make his/her first
dilution, then he takes 1 mL of this dilution and mixes it with 1 mL of diluent to make his
second dilution. He takes 1 mL of the second dilution and mixes with 1 mL of diluent. He
now has a _______ dilution and he just did a _________ dilution. correct answers 1/8,
serial
You just pulled off the results of the CMP on Mr Doe and you notice on the printout that
the AST and ALT results are too high for the analyzer to read. Your next step is to do a
dilution on this sample and reload it in the analyzer. You decide on a 1 to 5 dilution, you
need at least 100 uL (minimum volume). Which one of these scenarios is correct?
correct answers You mix 50 uL of sample with 200 uL of diluent
Serum glucose determinations are done on samples from a control pool each day for 30
days. Quality control statistics are then calculated. The mean is 100 mg/dL and the
standard deviation is 4 mg/dL. These statistics are used to label a quality control chart
for the mean and +2 SD. Samples from the same control pool are then assayed each
day along with patient samples, and control results are plotted on the chart. Results for
the first 10 days are as follows: correct answers 92 and 108
Lean Six Sigma is a combination of strategies designed to: correct answers Promote
measurable improvement
Serum glucose determinations are done on samples from a control pool each day for 30
days. Quality control statistics are then calculated. The mean is 100 mg/dL and the
standard deviation is 4 mg/dL. These statistics are used to label a quality control chart
for the mean and +2 SD. Samples from the same control pool are then assayed each
day along with patient samples, and control results are plotted on the chart. Results for
the first 10 days are as follows:
Day
Result
, 1
96
2
97
3
95
4
107
5
106
6
107
7
89
8
103
9
106
10
105
On day 7, the control results are more than two standard deviations from the mean. The
first thing you would do is: correct answers Rerun the control with the same reagents
A process sigma represents the capability of a process to meet its criteria for
acceptability. This would not include: correct answers cost
The following formula is used to calculate ____________ and evaluates ___________
error.
Bias/S.E. of Mean correct answers t-test; systematic
When a test has excellent performance, one can expect: correct answers few errors to
occur
The majority of laboratory errors occur in the: correct answers preanalytic phase
A test's "negativity in the absence of the disease" is termed its: correct answers
Specificity
The Lean Six Sigma method of process improvement assumes that processes are
inherently dynamic. correct answers true
Violation of the 2-2S, 4-1S or 10x Westgard rules is a strong indication of
_______________________. correct answers systematic error
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