Flashcard: Sample Handling and Preservation Techniques — 18 carte

Photosensitive samples — protection?

Must be shielded from light during transport.

Transport incident recording — purpose?

Ensures traceability and quality control.

Dry ice transport — labeling?

Container must be labeled to indicate dry ice presence.

Primary container — position during transport?

Transported horizontally to minimize agitation.

Nitrogen liquid samples — handling?

Require proper containment and handling protocols.

Blood coagulation — before centrifugation?

Complete coagulation prevents fibrin contamination.

Hemolysis — caused by?

Thermal shock, difficult venipuncture, sample delay.

Light exposure — effect on hemolysis?

Does not cause hemolysis in serum samples.

First morning urine — concentration?

More concentrated, higher chemical and formed elements.

Urine osmolality — in morning sample?

Higher due to increased concentration.

Midstream urine — collection purpose?

Reduces contamination for accurate analysis.

Semen abstinence — recommended?

2 to 7 days, not just 24 hours.

Condom use — during semen collection?

Should be avoided to prevent contamination.

Full ejaculate — collection?

Entire ejaculate, including all fractions, must be collected.

Semen sample — temperature before lab?

Maintain at body temperature; do not refrigerate.

Porphyrins — measurement sensitivity?

Highly affected by light exposure.

Vitamin D — affected by?

Light exposure can alter measurement accuracy.

CSF preservation — temperature?

Store at 35±2 ºC or room temperature if delayed.