Clin Lab 1 Lab Equipment

What machine is used to separate substances of different densities that are in a solution by spinning really fast?

Centrifuge.

What is the most common centrifuge, and the one here at school?

Angled Centrifuge Head.

Which type of centrifuge contains specimen cups that hang vertically when its at rest and during centrifugation, the cups swing out to the horizontal position?

Swinging-Arm Centrifuge.

The solid portion of the sample after centrifugation is the ________, and the liquid portion is the _________.

Sediment, supernatant

What is the ability of a method to be accurate and precise?

Reliability.

Which centrifuge is used for centrifuging/spinning down smaller samples, and uses smaller, specialized blood and urine tubes designed for it?

Idexx StatSpin VT.

If a centrifuge is spun for too long of a time or too fast, what can happen?

It can cause the cells to rupture and alter their morphology.

If a sample is spun for too slow or too short of a time, what can happen?

It can cause the sample to not completely separate.

What should you ALWAYS do when loading a centrifuge?

Balance your load.

What can be used to balance out your centrifuge load?

Water-filled tubes.

What is mainly used to measure the specific gravity of urine or other fluids and the plasma protein?

Refractometer.

What should you clean a refractometer with?

Distilled water and lens paper.

What is used for manual blood counts with a counting chamber?

Hemacytometer.

What inverts blood tubes keeping them at an even distribution and prevents clotting?

Blood rocker.

Which type of hematology analyzer uses differential centrifugation and estimation of cellular elements by measurements of an expanded buffy coat layer in a specialized microhematocrit tube?

Quantitive Buffy Coat System.

What is one of the most commonly used stains?

Diff-Quik.

Most chemistry analyzers utilize the principles of __________ to quantify constituents found in the blood.

Photometry.

What refers to the procedures established to ensure that clinical testing is performed in compliance with accepted standards and that the process and results are properly documented?

Quality Control.

Which type of chemistry analyzer uses pre-measured reagent slides, pads, or cartridges?

Dry.

Which type of hematology analyzers uses laser beams to to determine the size and density of solid components?

Laser-Based.

How closely results agree with the true quantitive value of the constituent.

Accuracy.

Which type of hematology analyzer counts the cells by measuring their ability to alter electric resistance as they pass through?

Impedance.

What is the magnitude of random errors and the reproducibility of measurements?

Precision.

Which type of chemistry analyzer uses lyophilized reagents or prepared liquid reagents and rotor technology?

Wet.

What are some advantages to using a DRY chemistry analyzer?

It is easy to operate, has elimination of liquid reagents, and less interference from lipemic and hemolyzed samples.

Why is it important to keep stain bottles/jars tightly capped when not in use?

It will prevent contamination, prevent and pH changes, and prevent evaporation of the stains.