Quantification of Blood Loss (QBL) Calculator

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Quantification of Blood Loss (QBL) Calculator

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1. Enter the amounts of fluids measured during vaginal delivery or cesarean delivery

Vaginal delivery		Cesarean delivery
Under-buttocks drape pre-placenta volume (ml)=		Drape pre-placenta volume (ml) =
Suction canister pre-placenta volume (ml) =		Suction canister pre-placenta (amniotic fluid) volume (ml) =
Under-buttocks drape post-placenta volume (ml) =		Drape post-placenta volume (ml) =
Suction canister post-placenta volume (ml) =		Suction canister post-placenta volume (ml)=
		Irrigant volume (ml) =
Weight clots (g)=		Weight clots (g)=

Net volume (ml) =		Net volume (ml) =

2. Enter information for blood soaked items

Weigh blood soaked items separately Weigh blood soaked items together

Item	Weight (g)	Number	Weight of blood soaked Item gkg pound
1. 4 X 4 gauze
2. Vag Pack (vag del)
3. Blue towel
4. 1 Lap sponge
5. 1 Peri-pad
6. 1 sm blue Chux
7. 1 admit kit blue Chux
8. 1 large prem comfort Chux
9. White cloth Chux
10 Mesh underwear
11.
12.
	Weight all blood soaked items (Enter this value directly if weighing all items together)

Formulas:
( Preplacenta volumes - postplacenta volumes )+ 1.05 X( Weight blood-soaked item(s) -Dry weight items)= weight of blood loss in mL

Density of blood =1.05 g/ml [1]

References

1. Waite GN "Blood Components " In: Rhoades R and , Bell D.R. 3rd ed. Medical Physiology: Principles for Clinical Medicine, 4th Edition. Lippincott Williams & Wilkins 2012; 107
2. Quantification of Blood Loss: AWHONN Practice Brief Number 1 http://www.pphproject.org/downloads/awhonn_qbl.pdf ACCESSED 5/28/2015

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