In Vivo Evaluation of Perineal Mechanical Properties During Childbirth

Centre Hospitalier Universitaire de Besancon10 enrolled

Overview

The objective of this work is to evaluate perineal elasticity and deformation and the perineal stresses induced by the fetus during delivery.

Study Type

INTERVENTIONAL

Allocation

Purpose

BASIC_SCIENCE

Masking

NONE

Enrollment

Conditions

Perineum; Rupture Perineum; Tear Perineal Tear

Interventions

assessment in the 8th month of pregnancy and during deliveryOTHER

* Day 0: presentation of the study * During pregnancy between Day 0 and 36-38SA: inclusion * During pregnancy: collection of pelvic MRI data if performed during pregnancy for maternal or fetal reasons * Between 36 and 38 WG: collection of demographic, obstetrical, fetal ultrasound and clinical data / Perineal elastographic recording / Recording of the perineal deformation by stereovision camera * In the delivery room, at the beginning of labor and before pushing: collection of clinical data / Collection of obstetrical ultrasound data / Perineal elastographic recordings / Recording of the perineal deformation by stereovision camera * In the delivery room, during expulsion : recording of the perineal deformation by stereovision camera * In the delivery room, after childbirth: collection of obstetrical, clinical and neonatal data / Perineal elastographic recordings / Cephalic and shoulder measurements of the newborn with a tape measure

Eligibility

Sex: FEMALEMin age: 18 YearsMax age: 50 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Pregnant and volunteer women \>18 years old * Primiparous * With a singleton pregnancy * No objection from the subject and the spouse to participate in the study Exclusion Criteria: * History of prior delivery or c-section * History of perineal troubles * BMI \> à 35 mg/m² * History of chronic muscular disease or connective tissue pathology * Psychiatric pathology requiring hospitalization * Patients who do not understand the French language * Legal incapacity or limited legal capacity * Patients unlikely to cooperate

Outcomes

Primary Outcomes

maximum value of equivalent deformation obtained by stereovision camera

Time frame: delivery

Secondary Outcomes

Delta between the minimum and maximum width of GH, and between the maximum and minimum length of PB

Time frame: pregnancy

Delta between the minimum and maximum width of GH, and between the maximum and minimum length of PB

elta between the minimum and maximum width of GH, and between the maximum and minimum length of PB

Time frame: delivery

Correlation between perineal deformation values and perineal tears

Time frame: delivery

Correlation between perineal deformation values and fetal parameters

Time frame: pregnancy

Correlation between perineal deformation values and fetal parameters

Time frame: delivery

Correlation between fetal ultrasound and neonatal parameters and perineal tears

Time frame: delivery

Data from ClinicalTrials.gov

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