The role of lower uterine segment in labor

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On the basis of results of complex morphological, experimental, clinical and hysterographics researches there were established, that the lower uterine segment in labor is special morphofunctional part of uterus, and its contractive activity participates in modulation of contractive activity of myometrium and directly participates in process of cervical dilatation when the cervix is comletely mature.

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A. Savitskiy

Research Institute of Obstetrics, Gynecology and Reproductology named after D.O. Ott

Email: info@eco-vector.com

Doctor of Medical Sciences

俄罗斯联邦, 3 Mendeleevskaya Line, Saint Petersburg, 199034

V. Abramchenko

Research Institute of Obstetrics, Gynecology and Reproductology named after D.O. Ott

Email: info@eco-vector.com

Doctor of Medical Sciences, Professor

俄罗斯联邦, 3 Mendeleevskaya Line, Saint Petersburg, 199034

G. Savitskiy

Research Institute of Obstetrics, Gynecology and Reproductology named after D.O. Ott

编辑信件的主要联系方式.
Email: info@eco-vector.com
俄罗斯联邦, 3 Mendeleevskaya Line, Saint Petersburg, 199034

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2. Fig. 1.

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3. Fig. 2.

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4. Rice. 3. Dynamics of the differential pressure between the pressure in the cavity of the body of the uterus (+ a) and in the cavity of the lower segment (-b) during labor contraction of the uterus (method of "overlay" curves).

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5. Fig. 4. Dependence of the rate of cervical dilatation (cm / h) in the active phase of the dilatation period on the Diff P value in the body cavity and the lower segment of the uterus, recorded at the peak of the labor contraction: vertically - the rate of dilatation, cm / h; horizontally - the value of the maximum Diff Р (+ Х-У), mm Hg

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6. Fig. 5. Dynamics of Diff P in the uterine body cavity (+ X) and the lower segment cavity (-U) during normal labor and labor complicated by hyper- and hypodynamic weakness of labor. Dynamics of Diff P (+ X-Y) with a specific generic uterine contraction. Explanations in the figure.

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