The Worldwide Burden of Postpartum Haemorrhage: Policy Development Where Inaction Is Lethal
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International Journal of Gynecology and Obstetrics (2006) 94 (Supplement 2), S116---S121 www.elsevier.com/locate/ijgo KEYNOTE ADDRESS The worldwide burden of postpartum haemorrhage: Policy development where inaction is lethal Malcolm Potts *, Anke Hemmerling School of Public Health, University of California, Berkeley, 518 Warren Hall, Berkeley, CA 94720-7360, USA Abstract timates for maternal mortality rates and progress monitoring mortality extremely difficult; underes- Most maternal deaths occur to women who are not timation is not only possible but very likely. De- attended by trained health professionals. Postpar- spite numerous efforts and global initiatives, begin- tum hemorrhage is the single most common cause ning with the Safe Motherhood Initiative launched of maternal death. The delivery of large haemo- in Nairobi in 1987, the number of women dying chorial placenta in our species predisposes to heavy in childbirth has not substantially decreased over bleeding and can be dealt with only by using effec- the last decade [2,3] (Table 1). With an unprece- tive uterotonics. The 1987 Safe Motherhood Initia- dented increase in the number of women of fertile tive has failed to reduce maternal mortality signifi- age worldwide, it is quite possible that unless bold cantly, and shortages of trained personnel will not new policies are adopted, more women will die from be remedied in the foreseeable future. Bold new pregnancy, childbirth and abortion in the coming 10 policies are imperative and need to be derived from years than in any decade in human history. an appropriate evidence base. It is suggested that these should include the low-cost shock garments in primary health facilities and making misoprostol Table 1 World total maternal deaths easily accessible in both the public and private sec- 1968---1971 4 years at 250,000 1,000,000 deaths tor. 1972---1975 4 years at 300,000 1,200,000 deaths 1976---1979 4 years at 350,000 1,400,000 deaths 1980---1983 4 years at 400,000 1,600,000 deaths The problem 1984---1987 4 years at 450,000 1,800,000 deaths 1988---1991 4 years at 500,000 2,000,000 deaths 1992---1995 4 years at 550,000 2,200,000 deaths Most developing countries lack an adequate vital 1996---1999 4 years at 575,000 2,300,000 deaths registration system [1], which makes accurate es- 2000---2003 4 years at 575,000 2,300,000 deaths 2004---2007 4 years at 600,000 2,400,000 deaths TOTAL 18.2 million deaths * Corresponding author. Tel.: +1 510 642-6915. E-mail: [email protected] (M. Potts). 0020-7292/$ --- see front matter © 2006 International Federation of Gynecology and Obstetrics. Published by Elsevier Ireland Ltd. All rights reserved. The worldwide burden of postpartum haemorrhage: Policy development where inaction is lethal S117 At the beginning of the twentieth century, ma- alwaysthemostcommonsinglecourseofmaternal ternal mortality in most developed countries was death [15]. The crucial question that must be an- comparable to parts of Africa today [4,5]. Data swered is: “Do we presently have sufficient knowl- from developed countries demonstrates that where edge and appropriate technology to control PPH and a policy to increase the use of midwives came into to save mothers' lives in the villages and slums place, maternal mortality fell rapidly [6---8]. The where women live on one or two dollars a day and compelling relationship between the percentage of where most maternal deaths take place?” women attended by a skilled person during delivery and maternal mortality is well documented [9,10]. Ninety-nine percent of the global burden of ma- The challenge of controlling PPH ternal mortality occurs in developing countries [11]. The largest number of deaths takes place among Before proceeding, it is useful to remind ourselves those women who have no skilled attendant during why PPH is such a lethal complication of partu- delivery. The global initiatives of the past 20 years rition. The structure of the mammalian placenta have emphasized emergency obstetric care (EOC). is well known [16,17], and many species, such as Underutilization of health facilities exists, even in pigs, have an epithelial-chorial placenta in which the poorest countries [12], and efforts to improve six layers of tissue separate the maternal and fetal the referral of women with delivery complications blood streams. Other species , such as dogs, have and to improve access to intravenous fluids and ce- five layered endothelial chorial placentae. Most pri- sarean sections are important and worthy endeavors. mates, although not all, have a haemo-chorial pla- Even within hospitals and clinics, more deaths from centa, and it is this placental structure that predis- PPH could be avoided if the active management of poses them to PPH. Conventional teaching is that the third stage were to be adopted universally, in- the human two layered haemo-chorial placenta rep- stead of the current disappointingly uneven fashion. resents the more advanced condition, because it The Gonoshasthaya Kendra Health Project (GK) in facilitates the transmission of gases and nutrients Bangladesh shows that a 50 bed rural hospital serv- from mother to fetus. However, offspring nourished ing 160,000 people can provide outstandingly cost- by multi-layered placentae do as well as human ba- effective services dealing with life threatening or bies, and a review of the phylogentic distribution disabling conditions at a cost of $10.95 per DALY of the structure of various placentae suggests that (disability-adjusted life years). In a sample three the evolution of viviparous mammals began with months, the largest single number of admissions a highly invasive trophoblast and a haemo-chorial (136/541) was for obstetric causes [13]. struture. This scenario, which was first suggested However, GK is the exception proving the rule, 40 years ago [18,19], has recently been confirmed because few health systems are willing to permit by an up-to-date phylogentic analysis [20]. Many the degree of non-specialist and paramedical in- species have been fortunate to develop mutations volvement that characterizes the work of GK. In that have moved them towards an epithelial-chorial most countries where only limited funds are avail- placenta, which is associated with a much lower risk able and geographic coverage of health care is of postpartum bleeding. This type of parallel evolu- severely limited, focusing on EOC by itself will not tion has occurred in species as diverse as opossums, come near to meeting the Millennium Development dolphins, the aye aye and horses, suggesting that Goal of reducing maternal deaths by three-quarters it is advantageous to have a multilayered placenta, between 1990 and 2015. escaping from the danger of PPH. To make matters worse, the health workforce in Africa is likely to decline in the coming decade, as Europe and North America continue to recruit health Uterotonics professionals from developing countries, probably at an accelerating rate. The American Hospital As- Darwinian evolution is not about what is nice, safe sociation reports 118,000 nursing vacancies in the or aesthetic, but about what works. Some primates USA and predicts this number will grow to 800,000 have been fortunate to evolve a multi-layered pla- by 2020 [14]. centa, but human beings remain burdened with a If health professionals and goverments want ma- highly invasive trophoblast and at delivery, the hu- ternal mortality to be reduced, then they must work man placenta leaves a huge, 20 centimeter diame- together to take the solution to the problem. In ter wound on the inside of the uterus. The potential general terms, the causes of maternal mortality of catastrophically heavy bleeding can be avoided are relatively constant across history and across na- only by powerful uterine contractions and complete tions. and postpartum hemorrhage (PPH) is nearly expulsion of all placental material. S118 M.Potts,A.Hemmerling Ergot alcaloid is the oldest known medicinal used ate information is possible. In the Dominican Repub- to control post partum haemorrhage; the first writ- lic, where information on correct use was limited, ten records describing its use date back to 1582. The the availability of misoprostol was nevertheless as- successful pharmacological control of PPH based on sociated with reduced morbidity (and by inference scientific data as well as the first steps towards ac- mortality) from unsafe abortion. Interestingly, the tive management of the third stage of labor were danger of inappropriate use of misoprostol has been taken by Moir and Dudley, who isolated ergometrine brought about as much or more by physicians than in 1932 [21,22]. Since the 1950s, this drug has saved by lay people. Some doctors try to induce labor by numerous women' s lives, but because of severe side cutting up 200 mcg tablets inaccurately and causing effects such as myocardial ischemia and the need to excessive contractions, uterine rupture, and fetal avoid using it in the presence of pre-eclampsia, it death. Nigeria and Kenya are moving forward with has become less popular over time. Oxytocin is now plans to import 25 mcg suppositories for labor induc- the drug of choice for PPH treatment. It is highly tion, and it is to be hoped that this will overcome effective and has an excellent safety profile. the risk of ruptured uteri resulting from inappropri- In recent years, the prostaglandin analogue miso- ate use of misoprostol. prostol has received considerable attention in terms of its ability to prevent or arrest post partum bleed- ing. Misoprostol is a low-cost, off patent tablet Who can give uterotonics and how do we with an excellent safety profile and a long shelf know? life. Worldwide, it has been taken as a long-term ulcer drug by millions of people during the last Ergometrine and oxytocin require administration twenty years in daily dosages comparable to the through an IV drip or by injection.