1 Foundations of Special Specimen Collection Free Online FlashCards

How should a patient be positively identified before specimen collection?

Match at least two patient-specific identifiers to the order and the patient’s identification band; never use a room or bed number.

What should you do when a collection requirement cannot be verified?

Pause collection and resolve the discrepancy before proceeding if the patient’s identity, order, preparation, or collection requirements cannot be verified.

What is the usual order of draw for venous tubes?

The usual venous sequence is blood cultures, sodium citrate, serum, heparin, EDTA, then fluoride/oxalate. Follow laboratory policy for unfamiliar or special tubes.

Why does the venous order of draw matter?

The order helps prevent additive carryover between tubes, which could affect test results.

How can contamination be minimized during blood culture collection?

Disinfect the site and bottle septum as directed, allow the antiseptic to dry, and avoid touching or repalpating the cleaned site unless using the approved sterile procedure.

When should blood cultures be collected relative to antimicrobial therapy?

Collect before antimicrobial therapy when feasible, but do not delay urgent treatment.

How should blood culture volume be chosen for pediatric patients?

Use the volume specified for the patient and culture system. Adult volumes must not be applied to infants or children; follow age-appropriate instructions.

Why must laboratory glucose specimens be processed as directed?

Blood cells continue to consume glucose after collection, so glucose may fall while the specimen remains in contact with them. Use the specified tube and processing instructions.

What must be documented for timed glucose testing?

Record the required interval, such as fasting, one-hour, or two-hour, on each specimen and collect it at the ordered time.

Why should a neonatal heel puncture not be excessively squeezed?

Avoid excessive squeezing or “milking,” which can damage cells or dilute the sample with tissue fluid.

How should a newborn dried-blood-spot card be handled after collection?

Let the spots dry completely, protect the card from contamination, and do not stack or package it while wet.

How should timed or serial specimens be labeled?

Label each specimen with its actual collection time or interval; do not infer timing from the order in which specimens were collected.