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clinical chemistry > Specimen collection and considerations > Flashcards

Specimen collection and considerations Flashcards

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1
Q

most common way to collect blood

a. venipuncture
b. ETS
c. syringe
d. butterfly set

A

venipuncture

most common way to collect blood

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2
Q

often hard to palpitate

a. median cubital vein
b. cephalic vein
c. basilic vein

A

cephalic vein

  • 2nd choice vein
  • often hard to palpate than mcv
  • fairly anchored
  • often the only vein felt in OBESE patients
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3
Q

only vein felt on obese patients

a. median cubital vein
b. cephalic vein
c. basilic vein

A

cephalic vein

  • 2nd choice vein
  • often hard to palpate than mcv
  • fairly anchored
  • often the only vein felt in OBESE patients
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4
Q

which of the ff vein is increased risk of puncturing a median cutaneous nerve branch or the branchial artery

a. median cubital vein
b. cephalic vein
c. basilic vein

A

basilic vein

  • last choice
  • not well anchored and ROLLS easily
  • increased risk of puncturing a median cutaneous nerve branch or the branchial artery
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5
Q

non fasting serum is cloudy due to _______

a. carbohydrates
b. lipids
c. enzymes
d. nota

A

non fasting serum is cloudy due to LIPIDS

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6
Q

serum separated from clotted blood by centrifugation( approx. __________ at RCF of 1000 to 2000g)

a. 20 secs
b. 5 mins
c. 10 mins
d. 30 mins

A

serum separated from clotted blood by centrifugation( approx. 10 minutes at RCF of 1000 to 2000g)

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7
Q

stat and other tests requiring a fat turn around time (TOT) are often collected in tubes containing __________ because they can be centrifuged immediately to obtain plasma

a. EDTA
b. Heparin
c. Sodium citrate
d. clot activator

A

stat and other tests requiring a fat turn around time (TOT) are often collected in tubes containing HEPATIN ANTICOAGULANT because they can be centrifuged immediately to obtain plasma

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8
Q

what type of blood specimen doesn’t contain fibrinogen

a. whole blood
b. serum
c. plasma

A

serum
- no clotting factor specially fibrinogen

plasma
- contains fibrinogen ( SERUM DOES NOT BECAUSE IT WAS USED IN CLOT FORMATION)

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9
Q

what method in venipuncture is the preferred method

a. ETS
b. syringe
c. butterfly set

A

ETS / evacuated tube system

  • preferred method because blood is collected directly from the vein into a tube
    minimizing the risk of specimen contamination and exposure to the blood
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10
Q

what method in venipuncture is used on small, fragile or damaged vein

a. ETS
b. syringe
c. butterfly set

A

needle and syringe

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11
Q

what gauge is most commonly used in phlebotomy

a. 18 gauge
b. 21 gauge
c. 23 gauge
d. 16 gauge

A

23 gauge

  • most commonly used
  • butterfly system

21 gauge
- standard for routine venipuncture

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12
Q

what is the standard gauge in venipuncture

a. 18 gauge
b. 21 gauge
c. 23 gauge
d. 16 gauge

A

23 gauge

  • most commonly used
  • butterfly system

21 gauge
- standard for routine venipuncture

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13
Q

which of the two is preferred to use

a. k3
b. k2

A

K2 EDTA/ SPRAY DRIED
- preferred

K3 edta/ liquid edta
- decrease HCT -> shrink rbc

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14
Q

what is the ratio of blood : anticoagulant in sodium citrate

a. 1:9
b. 9:1
c. 1: 6
d. 6:1

A

light blue
additive : Sodium citrate
ratio of blood : anticoagulant
9:1

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15
Q

what is the stopper color in fibrin degradation products

a. light blue
b. balck
c. yellow
d. light green

A

stopper color: light blue

anticoagulant/adddiive: THROMBIN AND SOY BEAN TRYPSIN

use: plasma/coagulation
action: FIBRIN DEGRADATION PRODUCTS

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16
Q

what anticoagulant is used in ESR

a. sodium citrate
b. lithium heparin
c. edta

A

stopper color: black

anticoagulant/adddiive: sodium citrate

use: plasma / Sedimentation rates hematology
action: chelates (binds) calcium

17
Q

what anticoagulant is used in HLA phenotyping

a. sodium fluoride
b. sodium citrate
c, acid citrate dextrose
d. thrombin

A

stopper color: yellow

anticoagulant/adddiive:
acid citrate dextrose

use: plasma/ blood bank, HLA phenotyping and paternity testing
action: wbc preservative

18
Q

what is the ration of blood: anticoagulnt in black tube

a. 9:1
b. 1:9
c. 1:4
d. 4:1

A

stopper color: black

anticoagulant/adddiive: sodium citrate

ration of Blood : anticoagulant
4:1

use: plasma / Sedimentation rates hematology
action: chelates (binds) calcium

clinical chemistry (26 decks)

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