LABORATORY WORKFLOW AND LABORATORY SAFETY Flashcards

PPT based (49 cards)

1
Q

THREE PHASES OF TESTING PROCESS

A

Pre-analysis
Analysis
Post-analysis

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2
Q
  • Activities that take place before testing
  • Test ordering and sample collection
A
  • Pre-analysis
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3
Q
  • Activities that produce a result
  • Running a sample on an automated analyzer
A

Analysis

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4
Q
  • Patient reporting and result interpretation
A
  • Post-analysis
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4
Q

% of testing errors occur in pre analysis phase

A

32%-75%

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5
Q

factors in pre analysis phase

A
  • Pre-collection variables
  • Specimen collection
  • Specimen transport
  • Specimen processing
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6
Q

hormone that is high in the morning

A

cortisol

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7
Q

brugia and wuchereria samples are best to collect at what time

A

after 8 PM

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8
Q

time variation for blood parasites

A

8-12 hours interval for 2-3 days

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8
Q

peak hours of cortisol

A

4-6 AM

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9
Q

loaloa samples are best to collect at what time

A

midday

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9
Q

malaria samples are best to collect at what time

A

between chills

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9
Q

what will increase in diet after eating

A

glucose
triglycerides

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9
Q

what hormones will increase if you are stressed

A

ACTH
cortisol
catecholamines

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10
Q

what hormones will increase if prolonged use of tourniquet

A

serum enzymes
proteins
protein-bound substances

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10
Q

what hormones will increase if you sit upright

A

increases hydrostatic pressure which increases protein concentration

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10
Q

what hormones will increase if being in a supine to sitting postition

A

increases hemoglobin
hematocrit
RBC count

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10
Q

One of the most frequent errors

A

selecting the wrong lab test

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10
Q

made during emergency situations and should be
documented

A

Verbal requests

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11
Q

Additional tests requested on a specimen previously collected

12
Q

time of collection

A
  • ASAP collection
  • Stat collection: collected and analyzed immediately
  • Timed specimens: OD, TID, BID, Qn (e. g. Q12, Q8, Q6, Q4, Q1)
  • 2-hour postprandial
  • Glucose tolerance test
13
Q

BID

13
Q

OD

13
Q

Qn

A

Q3 = every 3 hours

14
TIB
thrice a day (every 8hrs)
15
reflect the lowest level of drugs in the blood
Trough specimens; Collected 30 minutes before another dose is due
16
reflect the highest level of drugs in the blood
Peak specimens
16
Intramuscular
30 minutes- 1 hour after injection
16
Intravenous
15-30 minutes after injection/infusion
16
Oral
1 hour after drug is ingested
16
REASONS FOR SPECIMEN REJECTION
* Hemolysis/lipemia * Clots present in an anticoagulated specimen * Non-fasting specimen when test requires fasting * Improper blood collection tube * Short draws, wrong volume * Improper transport conditions (e.g., no ice for blood gases) * Discrepancies between requisition and specimen label * Unlabeled or mislabeled specimen * Contaminated specimen/leaking container
16
T/F: Excessively high peak levels could lead to toxicity and/or side effects
T
16
must be avoided to minimize hemolysis
Excessive agitation
16
Samples must be protected from light
bilirubin testing
17
Ideally, all measurements should be performed within
45 minutes to 1 hour after collection
18
preferred for most biochemical determination
Plasma or serum
19
is the specimen of choice due to its simplicity in collection and handling and no interference from anticoagulants
Serum
19
Serum or plasma must be stored at ... if analysis is to be delayed for longer than ...
4 to 6 degrees C; 4hrs
20
uses centrifugal force to separate phases of suspension by different densities
centrifuge
21
* Also known as panic or alert value * Requires rapid communication with a healthcare provider who can provide necessary medical interventions
Critical values
22
Careful planning and compliance with the laws minimize undesired outcomes
LAB SAFETY
23
Accidents are often caused by
* Inexperience * Ignoring known risks * Pressure to do more * Carelessness * Fatigue * Mental preoccupation
24
Exposure occurs from ingestion, inoculation, tactile contamination, or inhalation of infectious material
BIOLOGICAL HAZARDS
25
Safety features built into the overall design of the product
Engineering controls
25
Employers must develop a program to address work-related problems that include cumulative trauma disorders
ERGONOMIC HAZARDS
26
Barriers that physically separate the user from a hazard
Personal protective equipment
26
Evaluation of hazards by manufacturers
CHEMICAL HAZARDS
27
LABORATORY HAZARD PREVENTION STRATEGIES
Work practice controls Engineering controls Personal protective equipment
28
General procedures/policies that mandate measures to reduce or eliminate exposure to hazard
Work practice controls