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Medical Lab Assistant > Specimen preparation > Flashcards

Specimen preparation Flashcards

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USMLE® Step 1 flashcards
1
Q

Software Management in the lab which maintains patient information and specimen testing data

A

Laboratory Information System( LIS)

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2
Q

Unlabeled specimens (Accept/Reject)

A

Reject except for invasive collections like CSF or other bodily fluids can be processed with signed waiver from the collector that assumes responsibility

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3
Q

Mislabeled specimen (spelling)

A

Resolved by a phone call to ordering location to verify except for Transfusion medicine (Sample is rejected)

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4
Q

If sample is mislabeled with another patient information and demographics do not match requisition (Reject/Accept)

A

Rejected

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5
Q

Incorrect preservative

A

Reject

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6
Q

Contaminated specimen

A

Reject

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7
Q

Incorrect blood tube

A

Consult lab protocol

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8
Q

Inappropriate volume of Na Cit tubes

A

Reject

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9
Q

Hemolyzed blood

A

Discretion of the medical lab tech just attach comment results but not rejected

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10
Q

Lipemic specimen

A

Technologist will ultracentrifuge to spin out fat particles

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11
Q

Icteric blood high levels of bilirubin (yellow/green to bright yellow)

A

Add comments and result

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12
Q

Necessary to separate plasma or serum from the cells of blood for testing

A

Centrifugation

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13
Q

Speed setting (RPM/RCF)

A

RPM revolutions per minute RCF is relative centrifugal force

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14
Q

SST clotting time before centrifuge?

A

Gold- 30 mins

Red- 30-60 mins

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15
Q

If clotting is incomplete it will result in?

A

Strands of fibrin in serum sample

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16
Q

Centrifuge Serum and plasma tubes for how long and RCF?

A

10 minutes at 1000-1300 RCF

17
Q

Deliver unspun Na CIt tubes to coagulation bench and centrifuge for how long and RCF?

A

15 minutes at 1500

18
Q

Whole blood (EDTA) lav should it be centrifuged or not?

A

NO hand delivered to hematology bench

19
Q

How many times potassium in RBC than in serum?

A

25 times more potassium . Separation should occur within 2 hrs, delay will result in high K level and low sugar

20
Q

Clots or fibrin strands on PST post-centrifugation indicates

A

Specimen was not mixed properly after collection

21
Q

SST post-centrifugation leads to Free RBC and or fibrin strands is due to?

A

Centrifuging specimen before adequate clotting. Transfer serum to aliquot tube and re-spin

22
Q

Common technique to share serum or plasma among different benches or test

A

Aliquoting specimens

23
Q

Aliquoting specimen technique involves labeling tube Before or After aliquoting?

A

before aliquoting

24
Q

Obtain label of aliquoting from the requisition or primary tube?

A

From the primary tube always

25
Q

The aliquot tubes are placed in the front row or at the back of primary specimen tubes?

A

Aliquots are behind /back row

26
Q

C&S samples for urine needs which type of container?

A

Sterile container with lids for microbiology

27
Q

This urine specimen is collected any time without prior patient preparation

A

Random Specimen

28
Q

Used for routine microbiological culture and sensitivity test for urine collection

A

Midstream Clean catch specimen MSU

29
Q

Most concentrated specimen voided suitable for testing cytology

A

First morning specimen

30
Q

A timed urine collection using a lab provided collection container and should be kept in the fridge

A

24-Hour or timed specimen

31
Q

If preservatives will be added to the collection container by lab personnel, this needs to be done PRIOR or AFTER collection

A

Prior to start of collection

32
Q

What are the 4 Lab professional role in a 24-hour urine collection ?

A

Prepare container for collection
Explain collection procedure
Receive and accession the specimen
Process the specimen for testing

33
Q

Pediatric urine specimen (Sterile/not sterile) collection

A

Not Sterile from the bag transferred to a collection cup and sent to lab

Medical Lab Assistant (6 decks)

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