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Interobserver agreement in perineal ultrasound measurement of the anovaginal distance: a methodological study
Region Östergötland, Barn- och kvinnocentrum, Kvinnokliniken i Linköping. Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för barns och kvinnors hälsa. Linköpings universitet, Medicinska fakulteten.
Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för barns och kvinnors hälsa. Linköpings universitet, Medicinska fakulteten. Region Östergötland, Barn- och kvinnocentrum, Kvinnokliniken i Linköping.
Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för barns och kvinnors hälsa. Linköpings universitet, Medicinska fakulteten. Region Östergötland, Barn- och kvinnocentrum, Kvinnokliniken i Linköping.
Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för barns och kvinnors hälsa. Linköpings universitet, Medicinska fakulteten. Region Östergötland, Barn- och kvinnocentrum, Kvinnokliniken i Linköping.
2018 (engelsk)Inngår i: International Urogynecology Journal, ISSN 0937-3462, E-ISSN 1433-3023, Vol. 29, nr 5, s. 697-701Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Objective outcome measures of the extent of laceration at delivery are needed. In this study we evaluated and describe here a method for learning perineal ultrasound measurement of the anovaginal distance (AVD). The learning period needed for examiners proficient in vaginal ultrasound examination and the interobserver agreement after reaching proficiency in AVD measurement were determined. The hypothesis was that the method is feasible to learn and reproducible for use in further research. The method was taught by an examiner experienced in perineal ultrasonography. The distance between the mucosal margin of the internal anal sphincter was measured with a vaginal probe. The studied examiners measured the AVD until similar results (+/- 5 mm) were achieved. The AVD in 40 women was then measured and documented by two examiners who were blinded to each others results. Interobserver agreement was calculated using the kappa score. Examiners with previous experience in vaginal ultrasonography had learned the method after performing five sets of comeasurements. The AVD measurements after the learning period showed almost perfect agreement (kappa = 0.87) between the examiners. The method for perineal ultrasound measurement of AVD was learned quickly with high interobserver agreement. The method is feasible to learn and reproducible for use in further research.

sted, utgiver, år, opplag, sider
Springer London, 2018. Vol. 29, nr 5, s. 697-701
Emneord [en]
Perineal ultrasound examination; Anovaginal distance; Perineum; Interobserver agreement; Validation
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-147921DOI: 10.1007/s00192-017-3392-6ISI: 000430703900011PubMedID: 28624920Scopus ID: 2-s2.0-85020507347OAI: oai:DiVA.org:liu-147921DiVA, id: diva2:1209616
Tilgjengelig fra: 2018-05-23 Laget: 2018-05-23 Sist oppdatert: 2019-12-09bibliografisk kontrollert
Inngår i avhandling
1. Clinical and methodological aspects on perineal laceration diagnostics at childbirth
Åpne denne publikasjonen i ny fane eller vindu >>Clinical and methodological aspects on perineal laceration diagnostics at childbirth
2019 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Background: Obstetric perineal lacerations are common after vaginal birth. The degree of obstetric perineal laceration is defined by the extent of tissue involved in the laceration. When a perineal laceration has occurred after vaginal delivery, the examination for correct diagnostics is essential before primary suturing. Standard immediate postpartum care is an inspection and palpation of the obstetric perineal laceration. The aim of this thesis was to explore the diagnostics of obstetric perineal lacerations, and to examine how the methods of bidigital perineal palpation and transperineal ultrasound postpartum can contribute to the clinical diagnostic decisions before primary repair.

Material and Methods: Study I is a methodological study of transperineal ultrasound of the anovaginal distance. The learning curve and inter-observer agreement of the method is studied between three examiners in an outpatient gynaecological setting. Study II is a prospective observational study of 150 primiparous women with suspected perineal laceration of degree 2-3 immediately after childbirth and the association between bidigital palpation of the perineal height, the anovaginal distance and the final diagnosis of the perineal laceration. Study III is a retrospective observational study with data from the Swedish national Perineal Laceration Registry, studying maternal and obstetric risk factors for internal anal sphincter injury in 3,333 women with external sphincter injury. Study IV is a follow-up study focusing on the implementation strategies and outcome when introducing a new method, (the Diagnostics After DELivery – DADEL concept) for examining perineal lacerations at a maternity ward. The DADEL concept consists of a combination of bidigital palpation of the perineal tissues and transperineal ultrasound in order to determine the degree of perineal lacerations.

Results and conclusions: In study I, the method of transperineal ultrasound measurement of anovaginal distance revealed a short learning period and high interobserver agreement. This indicated that the method can be taught and reliably used in further research and clinical practice. In study II, women with external sphincter injury had a shorter anovaginal distance compared to women without this injury. The palpatory perineal thickness was associated with the anovaginal distance. Study III showed that 33% of primiparous women with an external anal sphincter injury also had an internal anal sphincter injury diagnosed immediately after delivery. When the infant was born with a hand or arm beside the head, there was an increased risk for internal anal sphincter injury. Perineal palpatory thickness of less than 10 mm was significantly associated with an internal anal sphincter injury. In the follow-up study of diagnostic methods showed a significantly higher use of bidigital palpation five years after introduction of the DADEL concept. The use of transperineal ultrasound showed no significant change during the same period.

sted, utgiver, år, opplag, sider
Linköping: Linköping University Electronic Press, 2019. s. 68
Serie
Linköping University Medical Dissertations, ISSN 0345-0082 ; 1715
HSV kategori
Identifikatorer
urn:nbn:se:liu:diva-162580 (URN)10.3384/diss.diva-162580 (DOI)9789179299620 (ISBN)
Disputas
2020-01-17, Belladonna, University Hospital Campus, Linköping, 09:00 (svensk)
Opponent
Veileder
Tilgjengelig fra: 2019-12-09 Laget: 2019-12-09 Sist oppdatert: 2020-01-08bibliografisk kontrollert

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