pre transfusion testing II Flashcards

1
Q

which of the enhancement media works by reducing the zeta potential and dispersing the charges, thus allowing the RBCs to approach each other.

a. 22% albumin
b. low ionic strength slain 0.2% NaCl
c. polybrene
d. polyethylene glycol

A

22% albumin
- reduce the zeta potential

liss 0.2% NaCl
- increase the uptake of antibody

polyethylene glycol
- removes water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

which of the enhancement media increases the uptake of antibody onto the RBC during the sensitization phase.

a. 22% albumin
b. low ionic strength slain 0.2% NaCl
c. polybrene
d. polyethylene glycol

A

22% albumin
- reduce the zeta potential

liss 0.2% NaCl
- increase the uptake of antibody

polyethylene glycol
- removes water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

which of the enhancement media removes water, thereby concentrating any antibodies present

a. 22% albumin
b. low ionic strength slain 0.2% NaCl
c. polybrene
d. polyethylene glycol

A

22% albumin
- reduce the zeta potential

liss 0.2% NaCl
- increase the uptake of antibody

polyethylene glycol
- removes water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

which potentiators increase tests sensitivity

a. ahg
b. 22% albumin
c. liss
d. peg

A

peg

action : increases test SENSITIVITY; aggreagates rbcs causing closer proximity to RBCs TO ONE ANOTHER; Assisting in antibody cross linking

Procedure: incubate at 37’C for 10-30 min

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

which potentiators causes rbcs to take up antibody morerapidly

a. ahg
b. 22% albumin
c. liss
d. peg

A

LISS

action : causes rbcs to take up antibody morerapidly

procdure: incubation at 37’C for 5-15 mins, cell washing before iat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The blood components should then be infused as quickly as tolerated, or at most within _______

a. 8 hours
b. 4 hours
c. 1 hour
d. 2 hours

A

> The blood components should then be infused as quickly as tolerated, or at most within 4 hours

> about 200ml blood/hr

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

how man % of albumin to used to dilute blood components

a. 5%
b. 3%
c. 0.2%
d. 10%

A

Intravenous fluid- only (0.9%) isotonic saline or 5% albumin should be used to dilute blood components

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

when to check blood warmers

a. daily
b. monthly
c. quaterly
d. every 4 horus

A

quaterly

  • blood warmers
  • cell washer
  • centrifuge speed timer
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

when to check heating blocks

a. daily
b. monthly
c. quaterly
d. every 4 horus

A

Daily When in Use
Heating blocks, Water Baths,
Donor unit agitators, Scales, Balances,
Hemoglobinometer, Microhematocrit centrifuges,
Refrigerator and Freezers (continuous monitoring)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

when to check centrifuge temperature

a. daily
b. monthly
c. quaterly
d. every 4 horus

A
Monthly
Alarm activation (freezers and refrigerators), centrifuge temperature(refrigerated)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly