JPAC Joint United Kingdom (UK) Blood Transfusion and Tissue Transplantation Services Professional Advisory Committee

Appendix 3 - Calculation of Plasma Dilution

*To be used in cases of significant blood loss

CRYSTALLOID INFUSED:

INTERVAL PRIOR TO SAMPLING

VOLUME INFUSED (ml)

% RETAINED

VOLUME RETAINED (ml)

>24 HOURS

 

0

NONE

2 - 24 HOURS

 

25

 

1 - 2 HOURS

 

50

 

<1 HOUR

 

75

 

TOTAL CRYSTALLOID RETAINED (ml):

 

 

BLOOD/COLLOID INFUSED:

 

INTERVAL PRIOR TO SAMPLING

VOLUME INFUSED (ml)

% RETAINED

VOLUME RETAINED (ml)

24 - 48 HOURS

 

100 (Blood)
50 (Colloid)

 

0 - 24 HOURS

 

100

 

TOTAL BLOOD/COLLOID RETAINED (ml):

 

 

ESTIMATED TOTAL BLOOD VOLUME:

% HAEMODILUTION

70 ml per kilogram of body weight*

(Crystalloid + Blood + colloid retained (ml)) x 100
estimated blood volume (ml)

 

ACCEPT (<50%) / REJECT (>50%)

SIGNED:

DATE:

COMMENTS:

 

* In critical care patients, the circulating blood volume is typically 45-60 ml per kg body weight compared to the normal 70 ml. 50 ml should be used in the calculations for such patients.


This appendix was last updated in TDSG-DD Edition 203, Release 02, Issue 01