SPECIMEN COLLECTION, HANDLING, AND STORAGE Flashcards
The first step in the laboratory investigation of
infectious diseases
SPECIMEN COLLECTION, HANDLING, AND
STORAGE
It is important that we know the different
temperatures we should maintain for the ____
of the samples in order to maintain the ___ of
the specimen.
viability; quality
An improperly collected, handled, and stored sample
may lead to
erroneous/ false negative/positive
results
An improperly collected, handled, and stored sample
may lead to erroneous/ false negative/positive
results:
○ Contamination due to poor collection technique
○ Poor specimen quality
○ Wrong timing
○ Insufficient quantity
○ Insufficient quantity
Analytes are collected during a particular time
of the day (diurnal rhythm). Also include
fasting specimens.
Wrong timing
For blood: should not be contaminated with
powder; should have no ____ in the sample
for it may cause hemodilution or
contamination.
IV fluid
For stool: should not be contaminated with_____ . These might kill the
trophozoites. Also, no tissue.
water or urine
Poor specimen quality example
● Clotted sample
● Hemolyzed sample
For urine samples of female patients
undergoing menstruation: the presence of
RBCs may confuse the MTs that the patient’s
kidneys are destroyed. Thus, the patient (px)
_______.
must declare ongoing menstruation
Below the mark in the container = short draw
or QNS. For microcontainer tubes, machines
in the laboratory will not accept the specimen
below ___ mark.
0.5
For urine samples: ____ of the container
should be filled
1⁄2 or 3⁄4
Seminal fluid must be transported at ____
degrees Celsius.
37
Sample for blood gas analysis must be
transported with __ at __ degrees Celsius.
with ice at 0 degrees Celsius
protozoan parasites commonly
associated with diarrheal illnesses.
Trophozoites
a diverse group of parasitic worms
that infect humans and other animals.
Helminths
