Chapter four - Key Terms

Aseptic

Free of pathogenic microorganisms that can cause disease.

Aseptic Technique

Practices that help maintain a clean environment to prevent infection and reduce sample contamination.

Bevel

The slanted tip of the needle.

Chlorhexidine

An antiseptic used as an alternative to alcohol.

Diaphoresis

Excessive perspiration (the process of sweating).

Flash

The moment when blood first appear in the hub of a needle after successful venipuncture.

Gauge

A measure of the diameter of the lumen of a needle.

Hemoconcentration

An increase in blood component concentration due to fluid loss.

Invert

Gentle rotation of a specimen by turning it upside down and then returning it to the upright position to mix the blood with an additive after collection.

Lumen

The hollow interior space of the needle.

Order of Draw

The proper sequence for blood tube collection, as defined by CLSI guidelines.

Requisition

A form sent to the laboratory that includes patient details, test ordered, and any special instructions.

Winged Infusion Set

A blood collection set that used small plastic “wings” for stabilization.