Transfusion of Blood Products

Question 1

Subjective assessment of blood usually over or underestimates blood loss?

Answer 1

Under by around 300ml!

Question 2

What is the oxygen-carrying capacity formula

Answer 2

CaO2= (SaO2 x Hgb x 1.34) + 0.003(PaO2)

*significantly more impact with hgb blood.

Question 3

The decision to transfusion PRBC should be based on?

Answer 3

Insufficient DO2 (oxygen delivery)
Hg <6 (almost always); Hg <7 (depends); you are transfusing RBC’s to improve DO2: arterial oxygen delivery, mixed venous, central venous oxygen sat; transfuse if there’s signs of improper DO2: lactate levels, signs of cardiac ischemia: hypotension, tachycardia

Question 4

Autologous transfusion is the patient’s or someone else’s cells?

Answer 4

The patient’s OWN cells

Question 5

Allogenic transfusion is the patient’s or someone else’s cells?

Answer 5

Someone else’s cells!

Question 6

Cell saver contraindications:

Answer 6

Bactierial infections
Sepsis
Bowel contents
Amniotic fluid
Malignancy

Question 7

Blood Type A can donate and receive blood from?

Answer 7

Donate to A and AB

Receive from A, O

Question 8

Blood Type B can donate and receive blood from?

Answer 8

Donate B and AB

Receive B and O

Question 9

Blood Type AB can donate and receive blood from?

Answer 9

AB

All types - universal acceptor

Question 10

Blood Type O can donate and receive blood from?

Answer 10

Donate to every type.

Receive only from O

Question 11

Describe the differences between:
Type
Screen
Cross

Answer 11

Type: ABO and Rh status.

Screen: Screens for more rare antibodies. [45min]

Cross: “test transfusion” mixes donor blood and patient blood. It greatly reduces the likelihood of transfusion rxn. [45min]