Enquiry into perinatal death

Perinatal mortality audits and reviews: Past, present and the way forward

Perinatal deaths are devastating for families and staff involved. Failure to examine perinatal deaths for substandard care prevents learning and may lead to recurrence of events, as well as prolonged morbidity in bereaved families and hospital staff. Perinatal mortality reviews can identify factors contributing to suboptimal care. An integrative literature review was carried out to study the different types of perinatal mortality reviews currently being done internationally, establishing a comparison and examining promising new developments. We start by outlining issues with the classification of perinatal deaths and the different types of perinatal mortality reviews carried out in high-income countries. We reflect on the challenges that are encountered in the current processes and we then comment on how these may be overcome. Current literature shows that differences in classifications of perinatal deaths continue to impede important international comparisons. National perinatal mortality audits can provide reliable high-quality data to facilitate national and international benchmarking. Confidential enquiries give expert assessment on anonymised information to initiate system-wide improvements, but to provide local information on perinatal deaths unit-based multi-disciplinary team reviews are required. Additionally, there is a need to shift from a blame-culture to a focus on achieving best practice by learning from mistakes. Review tools and processes have been implemented in some countries to standardize perinatal mortality reviews, but there is still more work to be done. Involving the bereaved parents in the perinatal mortality review process is important and ways to achieve this are progressing. A structured approach to the perinatal mortality review process should be developed to facilitate sharing of experiences and challenges at national (or international) level. To achieve a reduction in the number of stillbirths and neonatal deaths, it is crucial to ensure that the perinatal mortality audit and review cycle is completed with implementation and re-evaluation of recommended changes in maternity services.

Classification of perinatal deaths: development of the Australian and New Zealand classifications

Classifications of perinatal deaths have been undertaken for surveillance of causes of death, but also for auditing individual deaths to identify suboptimal care at any level, so that preventive strategies may be implemented. This paper describes the history and development of the paired obstetric and neonatal Perinatal Society of Australia and New Zealand (PSANZ) classifications in the context of other classifications. The PSANZ Perinatal Death Classification is based on obstetric antecedent factors that initiated the sequence of events leading to the death, and was developed largely from the Aberdeen and Whitfield classifications. The PSANZ Neonatal Death Classification is based on fetal and neonatal factors associated with the death. The classifications, accessible on the PSANZ website (http://www.psanz.org), have definitions and guidelines for use, a high level of agreement between classifiers, and are now being used in nearly all Australian states and New Zealand.

Confidential enquiry of stillbirths in current obstetric practice

OBJECTIVE

Confidential panel enquiry into sub-optimal factors relating to stillbirths.

METHOD

All 121 stillbirths in KK Women's and Children's Hospital in the years 1995 and 1996 were studied. Three assessors reviewed the case records of each death, and panel consensus was reached regarding sub-optimal antenatal care and factors leading to stillbirths.

RESULT

The incidence rate of stillbirth was 4.04 per 1000 deliveries. A total of 76 cases (62.8%) were found to have grade II and III sub-optimal factors in their management. Patients themselves were involved in the sub-optimal management of their own pregnancy in 52.9% of the stillbirths. Primary healthcare givers were involved in 8.3% of all stillbirths, specialist caregivers 12.4% and antenatal care system 4.1%.

CONCLUSION

The study has identified sub-optimal antenatal management in over 60% of cases. As patients' factors form the major contribution towards sub-optimal care, management strategy aimed towards improving patients' education and compliance to antenatal care should be a priority.

Influence of obstetric and perinatal care on perinatal mortality

OBJECTIVE

Cases of perinatal death attributed to suboptimal perinatal care between 1979 and 1992 inclusive at a large, tertiary care center are reviewed.

STUDY DESIGN

The study compared two periods: 1979-1985 and 1986-1992. The perinatal morbidity-mortality committee analyzed patient records for the mothers and neonates, delivery room records, the results of fetal autopsy, and histological sections of the placenta.

RESULTS

In the first period, 21.5% of the deaths were found to have received suboptimal care; this figure declined 13.5% in the second period (P < 0.05). During the second period, antenatal, intranatal and postnatal care improved, as shown by the lower suboptimal care rate for antepartum (15.8% versus 9.8%; P < 0.05), intrapartum (49.2% versus 22.1%; P < 0.001) and postpartum death (19.9% versus 8.1%; P < 0.001). During both periods, fetal death during pregnancy made up the largest proportion of deaths attributed to suboptimal care, with 44 cases (43.1%) during 1979-1985, and 36 cases (64.3%) during 1986-1992 (P < 0.01). Of these cases, fetuses with intrauterine growth retardation were the most frequent recipients of suboptimal care (20 cases (45.5%) during the first period; 18 cases (50%) during the second period).

CONCLUSION

Despite better prenatal care, the highest suboptimal care rate was due to suboptimal care during pregnancy, when some high risk situations were overlooked by the obstetrician.

Perinatal mortality at King Fahd Hospital of the University Al-Khobar, Saudi Arabia

The perinatal deaths of all singleton births that occurred at King Fahd Hospital of the University, Al-Khobar, Saudi Arabia during a 4-year period are analysed. The causes of death are classified into 12 groups using an extended modification of the Aberdeen classification. There were 165 perinatal deaths in 8057 singleton births, giving a perinatal mortality rate of 20.47 per 1000 total births. Fetal malformations occurred in 29 (17.57%) cases. Of the remaining 136 normal infants, 77 (56.6%) were stillbirths and 59 (43.4%) died within 1 week of delivery. Spontaneous premature labor was the commonest cause of death (23.52%) followed by birth trauma (11%) and maternal diseases (9.55%). The cause of death was not known in 22 (16.17%) cases. In conclusion, prevention of premature labor, better intrapartum fetal monitoring, early recognition of fetal distress and improvement of neonatal care should reduce the perinatal mortality rate.

Fetal and neonatal mortality: a matter of care? Report of a survey in Curaçao, Netherlands Antilles

A detailed clinicopathological analysis of 223 consecutive fetal and neonatal deaths was carried out in Curaçao during 1984 and 1985; this included careful histological examination of 210 infants (94%). The crude death rate was 34.2 per 1000 total births. Malformation was the principal cause of death in 28 cases, antepartum haemorrhage in 19, hypertension in 25, and asphyxia in 35. Death was caused by problems of preterm birth in 68 cases. No specific cause could be found for 34 deaths. Improvement in the quality of obstetric care might substantially reduce both fetal and neonatal death rates.

Comparisons of data from regional perinatal mortality surveys

The standard format in which NHS regions are invited to submit data from their perinatal mortality surveys for comparative analysis in the British Journal of Obstetrics and Gynaecology is described. Some examples of the way these data can and will be used to compare regional differences in mortality patterns are given and possible future developments are discussed. Although the term perinatal mortality is used in the title, it is hoped that surveys will cover stillbirths and neonatal deaths and also, where possible, late fetal deaths of less than 28 weeks gestation.

A validation of underlying cause of death, as recorded by clinicians on stillbirth and neonatal death certificates

Clinical case notes and necropsy reports were used to validate underlying causes of death as recorded and coded on 590 stillbirth and neonatal death certificates. There were 55 cases ascribed to respiratory distress syndrome, in 45 this was validated, three cases were not assigned to respiratory distress syndrome which should have been. In 102 cases death was ascribed to congenital malformation, this was validated in 96, 13 cases should have been assigned to congenital malformation, but were not. Use of available clinical and necropsy information when completing death certificates would have decreased the number of deaths attributed to respiratory distress syndrome by 13%, and increased the number certified as dying from congenital malformation by 10%.