Mlt Chemistry Final Part.1

Front 1

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?

Back 1

0.2

Front 2

Which statement describe optimal conditions for transport, handling, and storage of blood specimens for clinical chemistry testing?

Back 2

Specimen brought to lab immediately, permitted to clot, serum separated and tested as soon as possible

Front 3

Diurnal variation is a term that refers to:

Back 3

Time of day of specimen collection

Front 4

Ideally, the best type of centrifuge that separates blood cells and plasma for analysis in the clinical laboratory is:

Back 4

A temperature-controlled centrifuge with spinning buckets that holds 5–10 mL blood tubes

Front 5

What one item must be remembered with handling a tube of blood?

Back 5

Gloves and labcoats

Front 6

When finished with lab exercises for the day, which order of events should be followed?

Back 6

Disinfect area, remove gloves, remove lab coat and wash hands

Front 7

Which activity can spread HIV or HBV from one person to another outside of the laboratory?

Back 7

Sexual contact

Front 8

Face masks and protective eyewear are designed to offer protection from:

Back 8

Mucus membrane contact

Front 9

Universal Precautions should be observed when working with:

Back 9

All patients

Front 10

Which has the highest incidence of infectious risk in the clinical laboratory?

Back 10

Hepatitis

Front 11

Which procedure is most basic and effective in preventing the spread of infectious diseases in the hospital environment?

Back 11

Washing hands between each patient

Front 12

A laboratory fire ignited by faulty wiring in a chemistry analyzer and partially fueled by surrounding paper products is classified as:

Back 12

Class A and C

Front 13

What does the most to minimize aerosol production during centrifugation?

Back 13

Use stoppered centrifuge tubes or a cover over the rotor

Front 14

True or false? A patient's blood urea nitrogen (BUN) was 50 mg/dL on Day 1, and the control serum for BUN was within 2 SD of the mean on that day. On Day 2, the same patient's BUN was 70 mg/dL; again, the control value was acceptable. Should the physician interpret this increase in the BUN as a real pathologic change in the patient? (The only control level available for this test has a mean value of 20 mg/dL and a standard deviation of 2 mg/dL.)

Back 14

False

Front 15

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:Using 95% confidence limits means that 95% of the control values would fall between:

Back 15

92-108

Front 16

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:The coefficient of variation for these statistics is:

Back 16

4%

Front 17

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 chaff 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:On day 4 above, the light source was changed in the spectrophotometer used for this procedure. How are the results seen in the quality control after that day called?

Back 17

A shift

Front 18

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:On day 7, the control results are more than two standard deviations from the mean. The first thing you would do is:

Back 18

rerun the control with the same reagent

Front 19

The coefficient of variation (CV) is:

Back 19

Standard deviation expressed as a % of average values use to calculate standerd standard deviation

Front 20

The component used to isolate a wavelength in a spectrophotometer is called a:

Back 20

Monochromator

Front 21

In a spectrophotometric determination, what is the formula for calculating the absorbance of a solution?

Back 21

Beer formula

Front 22

In the automated chemistry analyzer, data management is a function of:

Back 22

Post analytical phase

Front 23

The chemical reaction phase includes:

Back 23

Does not include measurement

Front 24

Would serum uric acid levels may be elevated in patients undergoing cancer chemotherapy?

Back 24

Ture

Front 25

Describe the correct collection and handling conditions for a blood ammonia measurement

Back 25

Draw heparin tube, keep on ice, test immediately