<prompt> A female presents with significant blood loss du; postpaum haemorrhage PPH. What would be the shock index HRsystolic BP?.7-0.90.5-0.70.9-1.10.1-0.5  <response>: Shock index Hea rateSystolic BP Normal 0.5-0.7 If it becomes 0.9-1.1 it indicates massive blood loss and need for intensive resuscitation Ref: Fernando Arias 4e pg 391. 