An analysis of uterine activity in spontaneous labour using a microcomputer

Fairlie, Fiona; Phillips, G.F.; Andrews, B.J.; Calder, Andrew A.

doi:10.1111/j.1471-0528.1988.tb06480.x

Cited by 19 publications

(11 citation statements)

References 11 publications

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“…We feel that the 2 stages of labor are arbitrary subdivisions of a continuum which both have significant pressure effects onto the pelvic floor. This view is supported by reports showing that substantial forces from the presenting part of the fetus are exerted on to the pelvic floor during the whole labor process [9][10][11]. Subdividing this continuum into arbitrary labor stages restricts the sampling of data and may introduce spurious statistical calculations.…”

Section: Discussionsupporting

confidence: 50%

Effect of the Duration of Labor on Postpartum Postvoid Residual Bladder Volume

Yip

Hin²,

Chung³

1998

Gynecol Obstet Invest

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In order to investigate the possibility of protracted labor as a risk factor for postpartum urinary retention and to study the relation between duration of labor and postpartum day 1 postvoid residual bladder volume, the postpartum postvoid residual bladder volume (PVRBV) of a group of patients was studied using ultrasonography. Out of 707 patients investigated during a 2-month study period, a homogeneous group of 164 patients, with possible risk factors for postpartum urinary retention being controlled, was studied. The homogeneous group’s postpartum day 1 postvoid residual bladder volumes were assessed by ultrasonography and analyzed with respect to the duration of labor. The incidence of postpartum urinary retention (≥150 ml) was 11% in this homogeneous group. Labor duration longer than or equal to 800 min was associated with a higher incidence of postpartum urinary retention (χ² test; p < 0.05). Moreover, there is a direct relationship between the duration of labor and PVRBV which is described by a quadratic regression curve. Protracted labor longer than or equal to 800 min is a risk factor for postpartum urinary retention. The PVRBV is directly related to the duration of labor.

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Section: Discussionsupporting

confidence: 50%

Effect of the Duration of Labor on Postpartum Postvoid Residual Bladder Volume

Yip

Hin²,

Chung³

1998

Gynecol Obstet Invest

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“…Other investigators have directly analyzed uterine activity with and without epidural analgesia and found that such analgesia did not influence uterine activity in the first stage of labor. However, there was a lower level of uterine contraction, frequency, and intensity in the second stage 39 . It was hypothesized that the observed decrease in uterine activity during the second stage may contribute to the increased operative vaginal delivery rate 40 .…”

Section: Uncertaintiesmentioning

confidence: 81%

Neuraxial analgesia effects on labour progression: facts, fallacies, uncertainties and the future

Grant

Tao

Craig

et al. 2014

BJOG

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Approximately 60% of women who labor receive some form of neuraxial analgesia, but concerns have been raised regarding whether it negatively impacts the labor and delivery process. In this review, we attempt to clarify what has been established as truths, falsities, and uncertainties regarding the effects of this form of pain relief on labor progression, negative and/or positive. Additionally, although the term “epidural” has become synonymous with neuraxial analgesia, we discuss two other techniques, combined spinal-epidural and continuous spinal analgesia, that are gaining popularity, as well as their effects on labor progression.

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“…We addressed this question in our study with interesting results. We have previously shown that the level of uterine activity in spontaneous labour is lower in multiparous women compared with nulliparous women [4]. It would appear that this difference is mainly due to a lower contraction rate in multiparous women.…”

Section: Discussionmentioning

confidence: 95%

“…This was introduced into the amniotic cavity immediatedly after amniotomy as described by STEER [12]. A computer was used to analyse changes in intrauterine pressure and quantify uterine activity as previously reported [4,9]. Each time maternal blood was sampled for prostaglandin metabolite levels, uterine activity was quantified for a period of 20 minutes.…”

Section: Methodsmentioning

confidence: 99%

“…We have previously reported levels of uterine activity in spontaneous labour using a microcomputer based system capable of measuring and analysing intrapartum intrauterine pressure changes [4]. An important advantage of this system compared with other methods of measuring uterine activity is its ability to compute both total activity and the level of activity for time intervals of varying length and at any stage of labour.…”

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Uterine activity in spontaneous labour and maternal peripheral plasma prostaglandin E₂ and F_2alpha metabolites

Fairlie

Phillips²,

McLaren³

et al. 1993

Jpme

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The relationship between maternal peripheral plasma concentrations of prostaglandin E2 and prostaglandin F2 alpha metabolites (bicyclo-PGEM and PGFM respectively) and the level of uterine activity in spontaneous labour was studied in 10 nulliparous and 10 multiparous women. Plasma prostaglandin metabolites were measured by radioimmunoassay. Uterine activity was quantified by computer analysis of changes in intrauterine pressure and expressed as mean active pressure (MAP). As labour progressed, both parity groups showed a significant rise in MAP which was associated with a significant increase in the levels of PGFM. However, the percentage rise in PGFM did not significantly correlate with the percentage rise in MAP. At all stages in labour PGFM and MAP levels were higher in the nulliparous group compared with the multiparous group. Bicyclo-PGEM levels showed no significant change in the nulliparous group but rose in late first stage/second stage in the multiparous group. Our observations support a role for prostaglandin F2 alpha in the generation of uterine activity in spontaneous labour. However, further study is required to elucidate the mechanisms controlling prostaglandin production by the fetal membranes and decidua in vivo, and how this relates to maternal peripheral plasma prostaglandin metabolite concentrations and the level of uterine activity.

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An analysis of uterine activity in spontaneous labour using a microcomputer

Abstract: A . A. CALDER Professor Correspondencc: Dr F. M. Fairlie 1015-1021. 'I'romans. P. M . , Sheen, hl. A . Kc Bcazley. J. M. (1982) Fcto-matcrnal survcillancc iii labour: a iicw approach with an on-liiic microcomputer. Hr J O h m Gynaecol nY, 102 I -1030.

Cited by 19 publications

References 11 publications

Effect of the Duration of Labor on Postpartum Postvoid Residual Bladder Volume

Effect of the Duration of Labor on Postpartum Postvoid Residual Bladder Volume

Neuraxial analgesia effects on labour progression: facts, fallacies, uncertainties and the future

Uterine activity in spontaneous labour and maternal peripheral plasma prostaglandin E₂ and F_2alpha metabolites

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An analysis of uterine activity in spontaneous labour using a microcomputer

Abstract: A . A. CALDER Professor Correspondencc: Dr F. M. Fairlie 1015-1021. 'I'romans. P. M . , Sheen, hl. A . Kc Bcazley. J. M. (1982) Fcto-matcrnal survcillancc iii labour: a iicw approach with an on-liiic microcomputer. Hr J O h m Gynaecol nY, 102 I -1030.

Cited by 19 publications

References 11 publications

Effect of the Duration of Labor on Postpartum Postvoid Residual Bladder Volume

Effect of the Duration of Labor on Postpartum Postvoid Residual Bladder Volume

Neuraxial analgesia effects on labour progression: facts, fallacies, uncertainties and the future

Uterine activity in spontaneous labour and maternal peripheral plasma prostaglandin E 2 and F 2alpha metabolites

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Product

Resources

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Uterine activity in spontaneous labour and maternal peripheral plasma prostaglandin E₂ and F_2alpha metabolites