Postpartum haemorrhage, biology assignment help

Anonymous
timer Asked: Jul 31st, 2017
account_balance_wallet $9.99

Question Description

powerpoint presentations on physiologic changes during pregnancy

Tutor Answer

siyuwang
School: UT Austin

It was pleasure working with you.

Postpartum haemorrhage
primary PPH is ‘the loss of 500 ml or •
more of blood from the genital tract Or
any blood loss causing haemodynamic
instability occuring within 24 h of
birth’, while
secondary PPH is when it occurs more •
than 24 h after delivery

The “big 5” direct causes of
maternal deaths globally

2

Obstetric Haemorrhage 25%
Infection 15%
Unsafe abortion 13%
Eclampsia 12%
Obstructed labour 8%
Indirect causes 20% (malaria, HIV etc)








Maternal physiology is well prepared for
hemorrhage:

❖increase in blood volume .
❖hypercoagulable state.
❖the “tourniquet” effect of uterine
contractions.

❖vital signs may remain near
normal until more than 30% of
blood volume is lost .

❖tachycardia can be attributed
to pregnancy, stress, pain, and
delivery.

PHYSIOLOGY OF COAGULATION

The four components of coagulation
that continuously interrelate are
(1) the vasculature,
(2) platelets,
(3) plasma-clotting proteins,
(4) fibrinolysis.

plasma-clotting proteins
Activation of the clotting system is
initiated in two ways:

the intrinsic or extrinsic
pathway.

Intrinsic Pathway

requires no extravascular
component for initiation and
begins with Factor XII, which
is activated by contact with
injured epithelium.

Extrinsic Pathway
is activated by the tissue factor
thromboplastin (which subsequently
activates Factor VII) when vascular
disruption occurs. Prothrombin is
converted ...

flag Report DMCA
Review

Anonymous
awesome work thanks

Similar Questions
Related Tags

Brown University





1271 Tutors

California Institute of Technology




2131 Tutors

Carnegie Mellon University




982 Tutors

Columbia University





1256 Tutors

Dartmouth University





2113 Tutors

Emory University





2279 Tutors

Harvard University





599 Tutors

Massachusetts Institute of Technology



2319 Tutors

New York University





1645 Tutors

Notre Dam University





1911 Tutors

Oklahoma University





2122 Tutors

Pennsylvania State University





932 Tutors

Princeton University





1211 Tutors

Stanford University





983 Tutors

University of California





1282 Tutors

Oxford University





123 Tutors

Yale University





2325 Tutors