CClinicalTrials.gg
Status unknownNCT02209090MSIMSFPOPUpdated Aug 5, 2014

Modified Intrapartum Sims Position-related Efficiency in Correction of Persistent Foetal OP Positions

An interventional study of maternal modified sims position and maternal free positions in Persistent Occiput Posterior Position During Labor, sponsored by Hospital Universitari Vall d'Hebron Research Institute. Status unknown at 1 site in Spain. Open to female participants aged 18 Years to 45 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2014-08-05.

Sponsored by Hospital Universitari Vall d'Hebron Research Institute · Not applicable, Interventional, and Treatment

The sponsor has not verified this record recently (last verified Aug 2014), so the status shown — last known as Recruiting — may be out of date.
Phase
Not applicable
Study type
Interventional
Enrollment
56
Allocation
Randomized
Ages
18 Years to 45 Years
Sex
Female
01

Study summary

Aim: To evaluate the efficiency of the modified Sims position versus maternal free positions in the rotation of persistent foetal occipito-posterior position intrapartum in pregnant women with epidural anaesthesia.

Design: An open, randomised, controlled and parallel clinical trial will be conducted at the Delivery Room of the Area Materno-Infantil, Hospital Universitari Vall d'Hebron, Barcelona, Spain.

Method: Fifty-six pregnant women with persistent foetal occipito-posterior position will be selected. Each woman will be assigned to a control or experimental group via an opaque envelope at a 1:1 ratio.

The control group will deliver in free intrapartum positions, and the experimental group in a modified Sims position. Correction of foetal position is the key study variable, and delivery type the secondary variable. Statistical analyses will be made with the SPSS v.20 program.

Read the detailed description

Aim: To evaluate the efficiency of the modified Sims position versus maternal free positions in the rotation of persistent foetal occipito-posterior position intrapartum in pregnant women with epidural anaesthesia.

Background: There is a theoretical basis for the possible effects of maternal positions on foetal positions. Despite all the studies published in recent years, conclusive trials providing significant scientific evidence are lacking.

Design: An open, randomised, controlled and parallel clinical trial will be conducted at the Delivery Room of the Area Materno-Infantil, Hospital Universitari Vall d'Hebron, Barcelona, Spain.

Method: Fifty-six pregnant women with persistent foetal occipito-posterior position will be selected. Each woman will be assigned to a control or experimental group via an opaque envelope at a 1:1 ratio.

The control group will deliver in free intrapartum positions, and the experimental group in a modified Sims position. Correction of foetal position is the key study variable, and delivery type the secondary variable. Statistical analyses will be made with the SPSS v.20 program.

Discussion: If the modified maternal Sims position proved to correct persistent foetal occipito-posterior positions and being a non-invasive, low-cost, non-prejudicial method for both mother and foetus, maternal and foetal morbidity problem would be reduced

02

Conditions studied

  • Persistent Occiput Posterior Position During Labor

Keywords

  • occiput-posterior
  • occipitoposterior
  • labour
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In context

Lead sponsor

Hospital Universitari Vall d'Hebron Research Institute is the lead sponsor of 268 studies on the registry; 61 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years to 45 Years
Sexes eligible
Female
Accepts healthy volunteers
Yes

Inclusion criteria

  • adult pregnant women (>18 years of age)
  • persistent posterior foetal position diagnosed during labour through two vaginal examinations two hours apart.
  • at-term gestations (37 to 42 weeks)
  • women in labour with epidural anaesthesia

Exclusion criteria

Exclusion Criteria:

  • multiple gestations
  • previous severe foetal malformation diagnosed
  • macrosomic foetus diagnosed by ultrasound in the 3rd trimester (> percentile 95), or IUGR (\< percentile 10)
  • women with contraindicated vaginal delivery owing to previous vaginal surgeries
  • women with severe heart diseases
  • diabetic pregnant women (types I, II and gestational)
  • hypertension problems during labour
  • myopathies
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Outcomes assessor)
Enrollment
56 participants (estimated)

Study arms

  • Experimental
    maternal modified sims position

    Women in this group will adopt the modified Sims position, lying on the side of the foetal back. This position is maintained for the greater part of labour, at least 40 minutes, every hour. The mother can use other positions during resting time of no more than 20 minutes each hour, but never use a lateral position against the side of the foetal back.

    Procedure: maternal modified sims position

  • Sham comparator
    maternal free positions

    Women can adopt the position they wish and which is most comfortable, except for lateral positions which can only be used for a maximum of 20 minutes each hour to avoid confounding factors.

    Procedure: maternal free positions

Interventions

  • Procedurematernal modified sims position

    Maternal Modified Sims position during at least 40 minutes for each 60 minutes

  • Procedurematernal free positions

    At least 40 minutes each hour during labour

06

What researchers measure

Primary outcomes

  1. Rotation

    the foetal head's capacity to rotate 145º clockwise until the minor fontanelle is situated under the pubic bone, expressed as yes or no, depending on whether there is rotation or not.

    Time frame: During labour

Secondary outcomes

  1. rotating to OA

    length of time taken by the foetal head to reach OA expressed in minutes from the start of the intervention

    Time frame: During labour

  2. Delivery mode

    eutocic: vaginal delivery, foetal head expulsion in vertex position, spontaneous

    Time frame: The first two hours after delivery

Other outcomes

  1. uterine dynamics

    assessed by frequency and intensity according to Monteviedo unit calculation

    Time frame: During labour

  2. first stage in minutes

    timed in minutes, from 3cm with cervix shortened until complete diltation.

    Time frame: During labour

  3. second stage in minutes

    timed from complete dilation to foetal head expulsion

    Time frame: The first two hours after delivery

  4. epidural anaesthesia

    doses of epidural anaesthesia required, concentration and ml.

    Time frame: During labour

  5. episiotomy

    whether performed or not to gain a major opening from the soft parts of the birth canal.

    Time frame: The first two hours after delivery

  6. tear

    trauma occurring spontaneously by the foetal head passing through the vaginal cavity and/or perineum:

    Time frame: The first two hours after delivery

  7. reason to end labour earlier

    cause that occurs on ending labour before it concludes spontaneously. Reasons may be foetal: risk of loss of foetal wellbeing, or maternal: pelvic foetal disproportion or stopped labour

    Time frame: The first two hours after delivery

  8. maternal comfort during labour

    MACKEY SATISFACTION CHILDBIRTH RATING SCALE validated in Spanish

    Time frame: The first two hours after delivery

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Study locations

1 of 1 sites recruiting
  • Area Materno Infantil of the Hospital Univeristario Vall d'Hebron (AMI HUVH),
    Barcelona, Spain
    • Vanessa Bueno, Midwife · Contact · vanessabuenolopez@gmail.com · 0034934893086
    • Vanessa Bueno, Midwife · Principal investigator
    • Terré Carmen, PhD · Sub investigator
    • Casellas Manel, PhD · Sub investigator
    • Teva Asunción, midwife · Sub investigator
    Recruiting
08

References and documents

Publications

  • Bueno-Lopez V, Fuentelsaz-Gallego C, Casellas-Caro M, Falgueras-Serrano AM, Crespo-Berros S, Silvano-Cocinero AM, Alcaine-Guisado C, Zamoro Fuentes M, Carreras E, Terre-Rull C. Efficiency of the modified Sims maternal position in the rotation of persistent occiput posterior position during labor: A randomized clinical trial. Birth. 2018 Dec;45(4):385-392. doi: 10.1111/birt.12347. Epub 2018 Mar 14. PubMed 29537658 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 5, 2014, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT02209090
Lead sponsor
Hospital Universitari Vall d'Hebron Research Institute
Collaborators
University of Barcelona
Responsible party
Sponsor
First posted
Aug 5, 2014
Start date
Mar 2014
Primary completion
Dec 2015 (estimated)
Completion
Jun 2016 (estimated)
Last update
Aug 5, 2014

Study contacts

Vanessa Bueno, Midwife
Contact
vanessabuenolopez@gmail.com
Vanessa Bueno, PhDcandidate
principal investigator · HUValldebronRI

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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