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.
Teste tes connaissances avec un QCM de 9 questions sur Sample Handling and Preservation Techniques.
1. Which practice is essential for maintaining the integrity of photosensitive samples during transport?
2. What is the effect of incomplete blood coagulation prior to centrifugation?
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