Calibration And Quality Control Flashcards
Define calibration
Establishes an initial point of measurement or data point. Think of scale that is zeroed. Think of refractometer who specific gravity is adjusted with the screw to read 0 when distilled water is used
What are calibration and quality control needed for
Together ensure the accuracy of results. Complement each other and both are necessary
Why is quality control necessary
It checks that the calibration is correct. This is the exam for the equipment.
How can you test a scale to make sure this reliably weighing your patient
Use a standard to verify, weight or concentration
What do calibration and quality control together determine
The accuracy of the method. Accuracy and precision equals reliability
What can you say if you analyze a sample And get the correct result
The instrument does demonstrates good accuracy
What can you say about an instrument if you repeat the same analysis on the same sample a few times and get results with little variation
It has good precision
When does something have good accuracy and good precision
Correct results and acceptable variation. The only good option
When can something have poor accuracy And good precision
Incorrect results but An acceptable degree of variation
When can something have good accuracy but poor precision
Correct results but unacceptable degree of variation
When does something have poor accuracy and poor precision
Incorrect results with unacceptable degree of variation
What are errors in scale measurements due to
Displacing, tare, surface, location on scale, care and maintenance
What is an otoscope used for
Observation of ear structures
What are the components of the otoscope
Handle, head, bulb, speculum
What is the ophthalmoscope used for
Observation of eye structures. Dilation of pupils.
