Clinical Laboratory Supplies Flashcards
The predominant practice of celcius on centigrade uses
celcius, farenheit, kelvin
reactions that are temperature dependent use some type of:
heating/cooling cell, heating /cooling block, water/icebath
kinds of thermometers
liquid-in-glass thermometers, electronic thermometer, digital thermometer
another SRM, has a known melting point and can also be used for thermometer verification
Gallium
has increased and is now routinely incorporated in many devices
electronic thermometer
the advantage of thermistor over the more traditional liquid-in-glass thermometers are?
size and millisecond response time
Glasswares used in clinical laboratory usually fall into one of the following categories
Kimax/Pyrex (borosilicate) Corex (aluminosilicate) high silica vycor (acid and alkali resistant) low actinic (amber colored) flint (soda lime)
the major types of resins frequently used in the clinical chemistry laboratory
polystyrene, polyethylene, polypropylene, tygon, teflon, polycarbonate, and polyvinyl chloride
is calibrated to hold one exact volume of liquid
volumetric flask
are designed to hold different volumes rather than one exact amount
erlenmeyer flask and griffins beakers
are glass or plastic utensils used to transfer liquids, they may be reusable or disposable
Pipets
Design
to contain
to deliver
drainage characteristics
blowout and self-draining
measuring or graduated
serologic mohr bacteriologic ball, kolmer or kahn micropipet
transfer
volumetric
ostwald-folin
pasteur pipets
automatic macropipets or micopipets
has a continuous etched ring or two small, close, continuous rings located near top of the pipet
blowout pipet
user allows the contents of the pipet to drain by gravity
self-draining
does not have graduations on the tip
mohr pipet
has graduation marks to the tip and is generally a blowout pipet
serologic pipet
these pipets are designed to dispense volume without further subdivisions
transfer pipets
bulblike enlargement in the pipet stem easily distinguishes
ostwald-folin and volumetric subgroups
is design to dispense or transfer aqueous solutions and is always self draining
volumetric pipets
do not have calibration marks and are used to transfer solutions or biologic fluids without consideration of a specific volume
pasteur pipets
the most routinely used pipet in todays clinical chemistry laboratory
automatic pipet
a pipet with a pipetting capability of less than 1mL is considered a
micropipet
a pipet that dispenses greater than 1mL is called
macropipet
relies on a piston for creating suction to draw the sample into a disposable tip that must be changed after each use
air-displacement pipet
automatic pipets that can be categorized
air displacement, positive-displacement and dispensers
operates by moving the piston in the pipet tip or barrel, much like a hypodermic syringe and the piston does not come in contact with the liquid
positive-displacement pipet
are automatic pipets that obtain the liquid from a common reservoir and dispense
dispensers
do not need to be recalibrated by the laboratory
Class A pipets
looks like a wide, long, graduated pipet with a stopcock at one end
buret
are sometimes used for transfer of small volumes
syringes
the compound and the associated water
hydrate
drying agents
dessicants
closed and sealed containers
dessicators
3 types of balances
precision, analytic, microbalances
standards used prior to 1993
Class S
provide the greatest precision and should be used for calibrating high-precision analytic balances in the weight range
Class 1 weights
is process in which centrifugal force is used to separate solid matter from a liquid suspension
centrifugation
