Midwives' experiences of using the Obstetric Norwegian Early Warning System (ONEWS): A national cross-sectional study

Increasing numbers of maternity units are implementing routine and standardized monitoring of all women using a form of Early Warning Score System with the aim to early detect women at risk of developing critical illness or a deterioration of their condition. The implementation in Norway is relatively new. This study aimed to describe Norwegian midwives' experiences with the Obstetric Norwegian Early Warning System (ONEWS).

We performed a cross-sectional study based on an electronic questionnaire, sent to heads of midwifery at all maternity units in Norway for distribution to their clinically active midwives. Thirty-one of 48 units had implemented ONEWS for over a month. About 1020 midwives received the questionnaire, 232 (23%) responded.

Of the participants, 217 (93.5%) reported receiving sufficient training and 230 (99.1%) reported using the same scoring system, including the same vital parameters measured. The criteria for use of ONEWS varied between units regarding inclusion criteria and frequency of scoring. A total of 214 (92.2%) midwives agreed that ONEWS has value in the surveillance of high-risk women, while 152 (65.5%) agreed that ONEWS contributes to medicalization of the care of low-risk women. Some 166 (71.6%) midwives reported that ONEWS was time consuming and 159 (68.5%) that the measures need to be better adapted to childbearing women.

Maternity units in Norway implementing ONEWS use an almost identical scoring system but varying criteria for whom to score and how often. Midwives considered ONEWS particularly suited for high-risk women and not for low-risk childbearing women.