Cross Matches Flashcards

1
Q

Before issue….

A

a sample of recipients serum/plasma shall be cross matched against a donor sample cells

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2
Q

How are cross matches done?

A

Using a segment of whole blood

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3
Q

Blood from donor cell

A

retype ABO before use
Type and screen

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4
Q

Pre transfusion testing
ABO compatibility
blood/type shows?
Use what for Type O?
Only retest?

A

blood type/reverse shows us what ab can be made

Use A,B ab for unit retyping in O blood

only retest Ag that may immunize

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5
Q

ABO Check
two
Is…

ABO repeat on?
S
H
C

A

two determinations of recipients ABO group
IS cross match

ABO repeat on:
seperate collected sample
historical record
current sample repeated

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6
Q

Pre transfusion testing

A

Type and Screen
Crossmatch

Coombs cross match for low incidence Ab

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7
Q

Other clinicially sign ab

A

if ab screen is pos, do an ab ID

phenotype ab must be NEGATIVE FOR AG

coombs crossmatch between donor/pt

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8
Q

AHG check

A

Previous hxt of pt
current ab in plasma (known or unknown)
NEW WORKUP EVERY 72 HRS

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9
Q

How long is a workup okay for?

A

72 hrs

additional unites need crossmatch must be preformed the same way

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10
Q

Neg workups require?

A

Less work

negative ab screen = ABO match only

computer logic

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11
Q

Exceptions to “before issue”

A

emergency/neonate/massive transfusion/discrepency

Neonate doesnt need cross match because they dont have abs

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12
Q

Inventory availability

A

donor population frequency

expiration dates first

balance the need of pts/urgency requests

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13
Q

serological cross match
used when?
mix…
I/e

A

used when pt has no previous blood type on record

mix rbc from donor segment with plasma of recipient EDTA tube

IS/extended crossmatch

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14
Q

Electronic crossmatch
2
Must be
CANT DO IF

A

2 determinations of blood type

must be validated at each site and anually after

CAN NOT DO if pt has pos ab screen or hxt or pos Ab

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15
Q

Crossmatch tag

A

2 pt IDs
unit number/blood types
expiration dates

NEEDS TO BE ATTACHED whole 72hrs

READBACK w RN to verify

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16
Q

What can be attached to the component bag during a transfusion?

A

NO other component may be attached to a line exceot normal saline

observe forTFRX for 15min

17
Q

How long does a whole blood bag take to cycle?

A

4hrs

spiked bags are dead, throw them away if they are not used

18
Q

Which of the following tests does not have to be preformed for a pt to reciveve an electronic crossmatch?

A

ab screen on donor cell

19
Q

After a unit is issued how long does the nurse have to infuse the whole blood product into the pt?

A

4 hrs