Module 3- Specimen Collection Flashcards
Errors made during the testing process
Analytical errors
Errors made in interpretation of analytical results
Post-analytical errors
Most important step in specimen collection
PROPER PATIENT IDENTIFICATION
type of blood specimen used in chemistry
Serum
Type of blood specimen used in hematology and can be used in absence of serum
Plasma
Type of blood specimen used for hematology and chemistry
Whole blood
Anticoagulant present in plasma
Fibrinogen
Medtechs are not allowed to perform this procedure
Arterial puncture
A procedure frequently done on pediatrics or geriatric
Skin puncture
Most common blood collection method done by medtechs
Venipuncture
Most common AP site for adults
Radial artery (45 degrees)
2nd alternative AP site for adults
Brachial artery (45 degrees)
Least AP site for adults
Femoral artery (90 degrees)
Most common AP site for newborns
Umbilical artery
Test for collateral circulation of radial artery
Allen’s test
Preferred skin puncture site in babies or children
Lateral plantar heel surface
Preferred skin puncture site for adults
Palmar surface of fingers (3rd and 4th)
Another preferred skin puncture site
Earlobes
Preferred site for venipuncture
Antecubital fossa region
Preferred vein for venipuncture
Median cubital
2nd preferred vein
Cephalic
Least preferred vein
Basilic
Needle used for infants
Butterfly needle
Anticoagulant for glucose testing
Sodium fluoride
Meaning of EDTA
Ethylene-diamine-tetraacetic acid
Anticoagulant for coagulation studies
Citrate
Anticoagulant for ph or blood gas analysis
Heparin
Two most common reason for hemoglobin pigments
- Traumatic tap
- Subarachnoid haemorrhage
Collection method for cerebrospinal fluid
Lumbar puncture
Collected anytime during the day
Random sample
Preferred for pregnancy testing
First voided specimen
Used when physician requires urine samples to be taken at specific intervals during the day
Timed specimen
For creatinine clearance test and many other hormone studies
24-hour urine specimen
Used for culture and bacterial growth; routine screening
Clean-catch midstream specimen
Obtained by inserting a sterile flexible tube into the bladder via the urethra to withdraw urine
Catheterized specimen
How many mL of pleural fluid is needed for a complete analysis
20-40 mL
Pleural fluid should be transported to the laboratory at what temperature?
Ambient temperature
Maximum acceptable time delay before the processing of pleural fluid is?
2 hours
Pleural fluid should be stored in the refrigerator if longer delay is expected at what temp?
4 deg. celsius
Pleural fluid is collected from the?
Lung cavity
Pericardial fluid is collected via
Pericardiocentesis or open surgical drainage
Green peritoneal fluid indicates?
Bile, pancreatitis, cholecystitis
Cloudy/turbid peritoneal fluid indicates?
Infection
Viscous fluid in the cavities of movable joints
Synovial fluid
Synovial fluid is collected via
Arthrocentesis
Fluid present in the amniotic sac surrounding the fetus
Amniotic fluid
Collection procedure for amniotic fluid
Amniocentesis
Yellow amniotic fluid indicates
Hemolytic disease of the newborn
Dark green amniotic fluid indicates
Meconium
Dark red brown amniotic fluid indicates
Fetal death
Inert substances contained in or near the bottom of certain tubes
Thixothropic gel separators
Most common antiglycolytic agent
Sodium fluoride
Sodium fluoride is often combined with
Potassium oxalate
_______ May be used for transport of cerebrospinal fluid to the laboratory
Pneumatic tube system
