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HEMATOLOGY > BLOOD COLLECTION > Flashcards

BLOOD COLLECTION Flashcards

1
Q

Technique of choice to obtain blood specimen from newborns and pediatric patients

A

Skin puncture

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2
Q

For older children (>1y.o) and adults

A

Palmar surface of the non-dominant hand (3rd or 4th finger, distal portion)

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3
Q

Recommended depth of skin puncture for infants and small children; for adults

A

<2.0mm; 2.0-2.5mm

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4
Q

Possible effects of squeezing or “milking” the site

A

Hemolysis and excess interstitial fluid

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5
Q

Why discard the first drop of blood?

A

To discard excess tissue fluid
To discard dead epidermal cells
To facilitate free flow of blood

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6
Q

Devices for collecting blood in skin punture:

A

Capillary tubes and microcollection tubes

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7
Q

Orderof draw in skin puncture

A

TSEOS

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8
Q

Most common sites for venipuncture:

A

Superficial veins of the antecubital fossa

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9
Q

Most common skin antiseptic:

A

70% isopropyl alcohol

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10
Q

Two anatomical patterns in the antecubital fossa:

A

H and M

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11
Q

Veins order of preference in “H” pattern

A

Median cubital
Cephalic
Basilic

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12
Q

Veins order of preference in “M” pattern

A

Median
Accessory cephalic
Basilic

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13
Q

Angle between skin and needle

A

<30 degrees

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14
Q

Length of time in tourniquet application

A

<1 min

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15
Q

Effects of prolonged tourniquet application

A

HHS

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16
Q

Condition in which venous flow is slowed

A

Stasis

17
Q

Stasis results in the local accummulation of_________ and________ which may result in false shortening of clot-based coagulation test results

A

FVIII; VWF

18
Q

Distanc of tourniquet to the venipuncture site

A

Above 3-4 inches (7.5 to10cm)

19
Q

Most common needle size for adult venipuncture; and length

A

21 G; 1 inch

20
Q

A phlebotomist must not puncture a patient more than?

A

Twice

HEMATOLOGY (6 decks)

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