Midwives care during the Third Stage of Labour: An analysis of the New Zealand College of Midwives Midwifery Database 2004-2008
By Dixon, L, Fletcher, L, Tracy, S, Guilliland, K, Pairman, S, Hendry, C
on Thursday, 01 Oct 2009 in New Zealand College of Midwives Journal - Volume: 41
Background and purpose: The third stage of labour is the period of time following the birth of the baby when the placenta separates and is expelled from the uterus. There are two options or care pathways that can be provided. The first is a physiological pathway for the third stage (also called expectant management). The second is an actively managed third stage pathway. Midwives in New Zealand provide both types of care for women during the third stage of labour. The purpose of this research was to describe, analyse, and compare the outcomes of the two different management pathways for the third stage of labour following a normal physiological birth. Methods: Aggregated data from a sample of 33,752 women over a period of five years were used to identify the type of third stage provided. Selection criteria were applied so that only normal labour and births were included. Comparisons were made between women who received physiological care in third stage and those who received active management of the third stage of labour. Results: There were 16,238 (48.1%) women who received physiological management and 17,514 (51.9%) who received active management. Women who gave birth at home or in a primary birthing unit were more likely to have a physiological third stage than those who gave birth in a secondary or tertiary unit. Overall, the majority of women had a blood loss of less than 500 mls following birth. For those women who lost less than 500ml of blood, more women received physiological management (96.3%) than active management (93.1%), Z=12.7, p< 0.05). A physiological third stage took longer than an actively managed third stage with a length of more than 40 minutes for 11.3% of the physiological managed group compared to 5.4% of the actively managed group. For women in the active management group a longer time to the delivery of the placenta was associated with an increased blood loss (x2 = 221, df=2. p,0.001). Conclusions: The data demonstrates that following a physiological labour and birth, physiological care for the third stage results in less blood loss than active management and a lower incidence of post partum haemorrhage of between 500mls and 1000mls (3.1% compared to 5.3%) and more than 1000mls (0.5% compared to 1.5%).
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