Maintain or achieve haemodynamic stability and normovolaemia:
myocardiac ischaemia
with reduced contractility is often present when Hb values ≤ 6 g/dl (3.726 mmol/l) with or without haemodynamic abnormality (RR
sys
< 90 mmHg and/or RR
dia
< 50 mmHg and/or HR ≥ 115/min)
122
,
123
.
Timely call for expert assistance
is recommended for uncontrolled blood loss of more than 500 ml following vaginal delivery or more than 1000 ml following Caesarean section and is essential if blood loss is more than 1500 ml
29
,
89
,
95
,
124
.
For patients receiving
regional anaesthesia
(spinal anaesthesia, epidural anaesthesia): if blood loss is ≥ 1500 – 2000 ml and there are signs of persistent bleeding:
secure the airway and ensure sufficient oxygen supply
; if necessary, perform early intubation after consultation with the surgeon
125
. If there is a loss of protective reflexes, endotracheal intubation to secure the airway and ensure sufficient oxygenation must take priority.
Place
wide-diameter
access points (2× ≥ 16 G) followed by arterial blood pressure measurement, if necessary even before intubation. A wide-diameter central access (≥ 9 Fr) is recommended
125
,
126
,
127
,
128
.
-
Cell saver
blood (official recommendations of CMACE, NICE, OAA/AAGBI, ESA): use of mechanical autotransfusion in patients undergoing elective Caesarean section (e.g. in cases with placenta increta/percreta) can reduce the administration of allogenic blood postoperatively and the duration of hospital stay
129
,
130
. In the emergency setting of PPH the following
caveats
must be taken into consideration: should only be used, after amniotic fluid removal and delivery of the neonate.
Cell-saver blood does not contain clotting factors or platelets. Coagulation factors should be substituted to prevent coagulopathy when administering high transfusion volumes
131
.
Cases of hypotension have been reported following the re-transfusion of cell-saver blood with a leukocyte depletion filter
132
.
-
Target values in haemodynamic therapy
for “healthy” pregnant women and strong bleeding:
After cord clamping, hypotensive resuscitation
until surgical haemostasis is achieved with
restrictive fluid therapy
133
,
134
.
“Normal recapillarisation time” or “palpable radial pulse” are the target values for volume replacement therapy
135
,
136
Goal:
MAP > 65 mmHg or lower
137
or RR
sys
~ 90 mmHg
138
.
Target Hb:
indication for blood transfusion until surgical haemostasis:
7 g/dl
(4.347 mmol/l); after surgical haemostasis and successful treatment of the underlying pathology:
7 – 9 g/dl
(4.347 – 5.589 mmol/l)
23
,
134
,
138
. Note: ensure sufficient additional iron supplementation on the ward postoperatively.
Pharmacological thromboprophylaxis
within 24 hours after the pathology causing the bleeding has been treated
134
.
|