Incidence and risk factors for obstetric anal sphincter ruptures, OASIS, following the introduction of preventive interventions. A retrospective cohort study from a Norwegian hospital 2012–2017

Tone Selmer-Olsen*, Ellen Aagaard Nohr, Christian Tappert, Torbjørn Moe Eggebø

*Kontaktforfatter for dette arbejde

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

Objective: A decrease of obstetric anal sphincter injuries (OASIS) was observed after preventive interventions were implemented at a Norwegian university hospital. The aim was to investigate whether the improvement had sustained over the following years. Materials and methods: We performed a retrospective cohort study of 18 258 singleton vaginal cephalic births, ≥37 + 0 weeks of gestation during 2012–2017, examining data from the hospital's birth journals and separate registration forms. Interventions to prevent OASIS were implemented in 2011, and training in practical skills was repeated each year. Main outcome measures: The main outcome was OASIS (n = 377). Results: Frequency of OASIS overall decreased from 3.6% prior to 2011 to 2.1% after the intervention and sustained at that level throughout the study period. A trend of fewer OASIS among spontaneous deliveries, decreasing from 2.1% to 1.2% (p = 0.01) was observed, but no trend was seen for instrumental deliveries (p = 0.37), where the incidence fluctuated between 4.0% and 9.3% with an average of 6.5%. Primiparity, increased maternal age and increased fetal head circumference were associated with more OASIS in spontaneous deliveries. In instrumental deliveries, primiparity, occiput posterior position and increased fetal head circumference were associated with more OASIS, whilst episiotomy was associated with fewer OASIS. Conclusion: The incidence of obstetric anal sphincter injuries maintained at a similar level of around 2.1% during the six following years after introducing preventive interventions. Regularly repetition and practical training seemed to be effective.

OriginalsprogEngelsk
Artikelnummer100460
TidsskriftSexual and Reproductive Healthcare
Vol/bind22
Antal sider6
ISSN1877-5756
DOI
StatusUdgivet - 1. dec. 2019

Fingeraftryk

Obstetrics
Rupture
Cohort Studies
Retrospective Studies
Incidence
Wounds and Injuries
Parity
Episiotomy
Maternal Age
Outcome Assessment (Health Care)

Citer dette

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title = "Incidence and risk factors for obstetric anal sphincter ruptures, OASIS, following the introduction of preventive interventions. A retrospective cohort study from a Norwegian hospital 2012–2017",
abstract = "Objective: A decrease of obstetric anal sphincter injuries (OASIS) was observed after preventive interventions were implemented at a Norwegian university hospital. The aim was to investigate whether the improvement had sustained over the following years. Materials and methods: We performed a retrospective cohort study of 18 258 singleton vaginal cephalic births, ≥37 + 0 weeks of gestation during 2012–2017, examining data from the hospital's birth journals and separate registration forms. Interventions to prevent OASIS were implemented in 2011, and training in practical skills was repeated each year. Main outcome measures: The main outcome was OASIS (n = 377). Results: Frequency of OASIS overall decreased from 3.6{\%} prior to 2011 to 2.1{\%} after the intervention and sustained at that level throughout the study period. A trend of fewer OASIS among spontaneous deliveries, decreasing from 2.1{\%} to 1.2{\%} (p = 0.01) was observed, but no trend was seen for instrumental deliveries (p = 0.37), where the incidence fluctuated between 4.0{\%} and 9.3{\%} with an average of 6.5{\%}. Primiparity, increased maternal age and increased fetal head circumference were associated with more OASIS in spontaneous deliveries. In instrumental deliveries, primiparity, occiput posterior position and increased fetal head circumference were associated with more OASIS, whilst episiotomy was associated with fewer OASIS. Conclusion: The incidence of obstetric anal sphincter injuries maintained at a similar level of around 2.1{\%} during the six following years after introducing preventive interventions. Regularly repetition and practical training seemed to be effective.",
keywords = "OASIS, Obstetric anal sphincter injuries, Perineum support, Preventive interventions, Third-and fourth degree ruptures",
author = "Tone Selmer-Olsen and Nohr, {Ellen Aagaard} and Christian Tappert and Eggeb{\o}, {Torbj{\o}rn Moe}",
year = "2019",
month = "12",
day = "1",
doi = "10.1016/j.srhc.2019.100460",
language = "English",
volume = "22",
journal = "Sexual & Reproductive HealthCare",
issn = "1877-5756",
publisher = "Elsevier",

}

Incidence and risk factors for obstetric anal sphincter ruptures, OASIS, following the introduction of preventive interventions. A retrospective cohort study from a Norwegian hospital 2012–2017. / Selmer-Olsen, Tone; Nohr, Ellen Aagaard; Tappert, Christian; Eggebø, Torbjørn Moe.

I: Sexual and Reproductive Healthcare, Bind 22, 100460, 01.12.2019.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Incidence and risk factors for obstetric anal sphincter ruptures, OASIS, following the introduction of preventive interventions. A retrospective cohort study from a Norwegian hospital 2012–2017

AU - Selmer-Olsen, Tone

AU - Nohr, Ellen Aagaard

AU - Tappert, Christian

AU - Eggebø, Torbjørn Moe

PY - 2019/12/1

Y1 - 2019/12/1

N2 - Objective: A decrease of obstetric anal sphincter injuries (OASIS) was observed after preventive interventions were implemented at a Norwegian university hospital. The aim was to investigate whether the improvement had sustained over the following years. Materials and methods: We performed a retrospective cohort study of 18 258 singleton vaginal cephalic births, ≥37 + 0 weeks of gestation during 2012–2017, examining data from the hospital's birth journals and separate registration forms. Interventions to prevent OASIS were implemented in 2011, and training in practical skills was repeated each year. Main outcome measures: The main outcome was OASIS (n = 377). Results: Frequency of OASIS overall decreased from 3.6% prior to 2011 to 2.1% after the intervention and sustained at that level throughout the study period. A trend of fewer OASIS among spontaneous deliveries, decreasing from 2.1% to 1.2% (p = 0.01) was observed, but no trend was seen for instrumental deliveries (p = 0.37), where the incidence fluctuated between 4.0% and 9.3% with an average of 6.5%. Primiparity, increased maternal age and increased fetal head circumference were associated with more OASIS in spontaneous deliveries. In instrumental deliveries, primiparity, occiput posterior position and increased fetal head circumference were associated with more OASIS, whilst episiotomy was associated with fewer OASIS. Conclusion: The incidence of obstetric anal sphincter injuries maintained at a similar level of around 2.1% during the six following years after introducing preventive interventions. Regularly repetition and practical training seemed to be effective.

AB - Objective: A decrease of obstetric anal sphincter injuries (OASIS) was observed after preventive interventions were implemented at a Norwegian university hospital. The aim was to investigate whether the improvement had sustained over the following years. Materials and methods: We performed a retrospective cohort study of 18 258 singleton vaginal cephalic births, ≥37 + 0 weeks of gestation during 2012–2017, examining data from the hospital's birth journals and separate registration forms. Interventions to prevent OASIS were implemented in 2011, and training in practical skills was repeated each year. Main outcome measures: The main outcome was OASIS (n = 377). Results: Frequency of OASIS overall decreased from 3.6% prior to 2011 to 2.1% after the intervention and sustained at that level throughout the study period. A trend of fewer OASIS among spontaneous deliveries, decreasing from 2.1% to 1.2% (p = 0.01) was observed, but no trend was seen for instrumental deliveries (p = 0.37), where the incidence fluctuated between 4.0% and 9.3% with an average of 6.5%. Primiparity, increased maternal age and increased fetal head circumference were associated with more OASIS in spontaneous deliveries. In instrumental deliveries, primiparity, occiput posterior position and increased fetal head circumference were associated with more OASIS, whilst episiotomy was associated with fewer OASIS. Conclusion: The incidence of obstetric anal sphincter injuries maintained at a similar level of around 2.1% during the six following years after introducing preventive interventions. Regularly repetition and practical training seemed to be effective.

KW - OASIS

KW - Obstetric anal sphincter injuries

KW - Perineum support

KW - Preventive interventions

KW - Third-and fourth degree ruptures

U2 - 10.1016/j.srhc.2019.100460

DO - 10.1016/j.srhc.2019.100460

M3 - Journal article

C2 - 31491687

AN - SCOPUS:85071559192

VL - 22

JO - Sexual & Reproductive HealthCare

JF - Sexual & Reproductive HealthCare

SN - 1877-5756

M1 - 100460

ER -