1
|
Yano E, Sayama S, Iriyama T, Ariyoshi Y, Akiba N, Ichinose M, Toshimitsu M, Seyama T, Kumasawa K, Nakayama T, Kobayashi K, Nagamatsu T, Hirota Y, Osuga Y. Prediction of spontaneous vaginal delivery in the prolonged second stage using the delta angle of progression. Am J Obstet Gynecol MFM 2024; 6:101403. [PMID: 38880239 DOI: 10.1016/j.ajogmf.2024.101403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Revised: 05/02/2024] [Accepted: 05/20/2024] [Indexed: 06/18/2024]
Abstract
BACKGROUND It is clinically challenging to determine when to intervene in the prolonged second stage. Although individualized prediction of spontaneous vaginal delivery is crucial to avoid maternal and neonatal complications associated with operative deliveries, the approach has not been fully established. OBJECTIVE We aimed to evaluate the predictability of spontaneous vaginal delivery using the difference in angle of progression between pushing and rest, delta angle of progression, to establish a novel method to predict spontaneous vaginal delivery during the prolonged second stage in nulliparous women with epidural anesthesia. STUDY DESIGN We retrospectively analyzed deliveries of nulliparous women with epidural anesthesia between September 2018 and October 2023. Women were included if their delta angle of progression during the second stage was available. Operative deliveries were defined as the cases that required forceps, vacuum, and cesarean deliveries due to labor arrest. Women requiring operative deliveries due to fetal and maternal concerns, or women with fetal occiput posterior presentation were excluded. The second stage was stratified into the prolonged second stage, the period after 3 hours in the second stage, and the normal second stage, the period from the beginning until the third hour of the second stage. The association of the delta angle of the progression measured during each stage with spontaneous vaginal delivery and operative deliveries was investigated. Furthermore, the predictability of spontaneous vaginal delivery was evaluated by combining the delta and rest angle of progression. RESULTS A total of 129 women were eligible for analysis. The delta angle of progression measured during the prolonged second stage and normal second stage were significantly larger in women who achieved spontaneous vaginal delivery compared to operative deliveries (p<.001 and p<.05, respectively). During the prolonged second stage, a cutoff of 18.8 derived from the receiver operative characteristic curves in the context of the delta angle of progression predicted the possibility of spontaneous vaginal delivery (sensitivity, 81.8%; specificity, 60.0%; AUC, 0.76). Combining the rest angle of progression (>140) and delta angle of progression (>18.8) also provided quantitative prediction of spontaneous vaginal delivery (sensitivity, 86.7%; specificity, 70.0%; AUC, 0.80). CONCLUSION The delta angle of progression alone or in combination with the rest angle of progression can be used to predict spontaneous vaginal delivery in the second stage in nulliparous women with epidural anesthesia. Quantitative analysis of the effect of pushing using the delta angle of progression provides an objective guide to assist with an assessment of labor dystocia in the prolonged second stage on an individualized basis, which may optimize labor management in the prolonged second stage by reducing neonatal and maternal complications related to unnecessary operative deliveries and prolonged second stage of labor.
Collapse
Affiliation(s)
- Eriko Yano
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Yano, Sayama, Iriyama, Ariyoshi, Akiba, Ichinose, Toshimitsu, Seyama, Kumasawa, Nagamatsu, and Osuga)
| | - Seisuke Sayama
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Yano, Sayama, Iriyama, Ariyoshi, Akiba, Ichinose, Toshimitsu, Seyama, Kumasawa, Nagamatsu, and Osuga).
| | - Takayuki Iriyama
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Yano, Sayama, Iriyama, Ariyoshi, Akiba, Ichinose, Toshimitsu, Seyama, Kumasawa, Nagamatsu, and Osuga)
| | - Yu Ariyoshi
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Yano, Sayama, Iriyama, Ariyoshi, Akiba, Ichinose, Toshimitsu, Seyama, Kumasawa, Nagamatsu, and Osuga)
| | - Naoya Akiba
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Yano, Sayama, Iriyama, Ariyoshi, Akiba, Ichinose, Toshimitsu, Seyama, Kumasawa, Nagamatsu, and Osuga); Department of Obstetrics and Gynecology, International University of Health and Welfare Narita Hospital, Chiba, Japan (Akiba and Nagamatsu)
| | - Mari Ichinose
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Yano, Sayama, Iriyama, Ariyoshi, Akiba, Ichinose, Toshimitsu, Seyama, Kumasawa, Nagamatsu, and Osuga)
| | - Masatake Toshimitsu
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Yano, Sayama, Iriyama, Ariyoshi, Akiba, Ichinose, Toshimitsu, Seyama, Kumasawa, Nagamatsu, and Osuga)
| | - Takahiro Seyama
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Yano, Sayama, Iriyama, Ariyoshi, Akiba, Ichinose, Toshimitsu, Seyama, Kumasawa, Nagamatsu, and Osuga)
| | - Keiichi Kumasawa
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Yano, Sayama, Iriyama, Ariyoshi, Akiba, Ichinose, Toshimitsu, Seyama, Kumasawa, Nagamatsu, and Osuga)
| | - Toshio Nakayama
- Department of Obstetrics and Gynecology, Sanno Hospital, Tokyo, Japan (Nakayama)
| | - Koichi Kobayashi
- Department of Obstetrics and Gynecology, Tokyo Yamate Medical Center, Tokyo, Japan (Kobayashi)
| | - Takeshi Nagamatsu
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Yano, Sayama, Iriyama, Ariyoshi, Akiba, Ichinose, Toshimitsu, Seyama, Kumasawa, Nagamatsu, and Osuga); Department of Obstetrics and Gynecology, International University of Health and Welfare Narita Hospital, Chiba, Japan (Akiba and Nagamatsu)
| | - Yasushi Hirota
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Yano, Sayama, Iriyama, Ariyoshi, Akiba, Ichinose, Toshimitsu, Seyama, Kumasawa, Nagamatsu, and Osuga)
| | - Yutaka Osuga
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Yano, Sayama, Iriyama, Ariyoshi, Akiba, Ichinose, Toshimitsu, Seyama, Kumasawa, Nagamatsu, and Osuga)
| |
Collapse
|
2
|
Yano E, Iriyama T, Sayama S, Ariyosi Y, Akiba N, Ichinose M, Toshimitsu M, Seyama T, Sone K, Kumasawa K, Nagamatsu T, Nakayama T, Kobayashi K, Osuga Y. The head direction to the angle of progression ratio: a quantitative parameter for intrapartum evaluation of cephalic malposition. Am J Obstet Gynecol MFM 2023; 5:100755. [PMID: 36155110 DOI: 10.1016/j.ajogmf.2022.100755] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 09/19/2022] [Indexed: 10/14/2022]
Abstract
BACKGROUND No previous study has evaluated the transitions of intrapartum transperineal ultrasound parameters during labor progression in cephalic malposition. OBJECTIVE We aimed to quantitate the characteristic trends of fetal head position and descent in cephalic malposition by analyzing the transitions of intrapartum transperineal ultrasound parameters and explore an indicator associated with the degree of cephalic malposition. STUDY DESIGN We retrospectively analyzed pregnant women who delivered at term from January 2018 to December 2020 at the University of Tokyo Hospital. The fetal occipital position was classified as occiput anterior and nonocciput anterior according to the fetal occipital angle of 0° to 75° and 75° to 180°, respectively. Fetal occipital angle was defined by the midline angle and position of the ocular orbit. The differences in the trends of head direction, head-symphysis distance, and progression distance relative to the angle of progression between occiput anterior and nonocciput anterior cases were evaluated. In addition, the parameters that showed differences were analyzed to evaluate their relationship to the degree of cephalic malposition. RESULTS A total of 502 images (occiput anterior, 319; nonocciput anterior, 183) met the inclusion criteria. The distribution of head direction values relative to the angle of progression was smaller in the nonocciput anterior group than in the occiput anterior group, whereas the head-symphysis distance and progression distance values relative to the angle of progression showed no difference in their distribution between the occiput anterior and nonocciput anterior groups. The ratio of head direction to the angle of progression was significantly smaller in the nonocciput anterior group than in the occiput anterior group (median [interquartile range], 0.03 [-0.02 to 0.10] vs 0.21 [0.12-0.28]; P<.0001). Furthermore, this ratio was negatively correlated with fetal occipital angle (Spearman correlation coefficient, -0.66). CONCLUSION Our results indicated that the head direction to angle of progression ratio reflects the deviation in the fetal head direction toward the maternal dorsal side, and decreases in proportion to the degree of cephalic malposition. This concept of deviation in the head direction as an indicator for evaluating cephalic malposition with intrapartum transperineal ultrasound may contribute to improving labor management in the case of cephalic malposition.
Collapse
Affiliation(s)
- Eriko Yano
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Drs Yano, Iriyama, Sayama, Ariyosi, Akiba, Ichinose, Toshimitsu, Seyama, Sone, Kumasawa, Nagamatsu, and Osuga)
| | - Takayuki Iriyama
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Drs Yano, Iriyama, Sayama, Ariyosi, Akiba, Ichinose, Toshimitsu, Seyama, Sone, Kumasawa, Nagamatsu, and Osuga).
| | - Seisuke Sayama
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Drs Yano, Iriyama, Sayama, Ariyosi, Akiba, Ichinose, Toshimitsu, Seyama, Sone, Kumasawa, Nagamatsu, and Osuga)
| | - Yu Ariyosi
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Drs Yano, Iriyama, Sayama, Ariyosi, Akiba, Ichinose, Toshimitsu, Seyama, Sone, Kumasawa, Nagamatsu, and Osuga)
| | - Naoya Akiba
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Drs Yano, Iriyama, Sayama, Ariyosi, Akiba, Ichinose, Toshimitsu, Seyama, Sone, Kumasawa, Nagamatsu, and Osuga)
| | - Mari Ichinose
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Drs Yano, Iriyama, Sayama, Ariyosi, Akiba, Ichinose, Toshimitsu, Seyama, Sone, Kumasawa, Nagamatsu, and Osuga)
| | - Masatake Toshimitsu
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Drs Yano, Iriyama, Sayama, Ariyosi, Akiba, Ichinose, Toshimitsu, Seyama, Sone, Kumasawa, Nagamatsu, and Osuga)
| | - Takahiro Seyama
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Drs Yano, Iriyama, Sayama, Ariyosi, Akiba, Ichinose, Toshimitsu, Seyama, Sone, Kumasawa, Nagamatsu, and Osuga)
| | - Kenbun Sone
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Drs Yano, Iriyama, Sayama, Ariyosi, Akiba, Ichinose, Toshimitsu, Seyama, Sone, Kumasawa, Nagamatsu, and Osuga)
| | - Keiichi Kumasawa
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Drs Yano, Iriyama, Sayama, Ariyosi, Akiba, Ichinose, Toshimitsu, Seyama, Sone, Kumasawa, Nagamatsu, and Osuga)
| | - Takeshi Nagamatsu
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Drs Yano, Iriyama, Sayama, Ariyosi, Akiba, Ichinose, Toshimitsu, Seyama, Sone, Kumasawa, Nagamatsu, and Osuga)
| | - Toshio Nakayama
- Department of Obstetrics and Gynecology, Sanno Hospital, Tokyo, Japan (Dr Nakayama)
| | - Koichi Kobayashi
- Department of Obstetrics and Gynecology, Tokyo Yamate Medical Center, Tokyo, Japan (Dr Kobayashi)
| | - Yutaka Osuga
- Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan (Drs Yano, Iriyama, Sayama, Ariyosi, Akiba, Ichinose, Toshimitsu, Seyama, Sone, Kumasawa, Nagamatsu, and Osuga)
| |
Collapse
|
3
|
Youssef A, Brunelli E, Fiorentini M, Pilu G, El-Balat A. The correlation between levator ani co-activation and fetal head regression on maternal pushing at term. J Matern Fetal Neonatal Med 2022; 35:9654-9660. [PMID: 35282757 DOI: 10.1080/14767058.2022.2050363] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVE To assess the correlation between fetal head regression and levator ani muscle (LAM) co-activation under Valsalva maneuver. STUDY DESIGN This study was a secondary analysis of a prospective cohort study on the association between the angle of progression (AoP) and labor outcome. We scanned a group of nulliparous women at term before the onset of labor at rest and under maximum Valsalva maneuver. In addition to the previously calculated AoP, in the present study, we measured the anteroposterior diameter of LAM hiatus (APD) on each ultrasound image. LAM co-activation was defined as APD at Valsalva less than that at rest, whereas fetal head regression was defined as AoP at Valsalva less than that at rest. We calculated the correlation between the two phenomena. Finally, we examined various labor outcomes according to the presence, absence, or co-existence of these two phenomena. RESULTS We included 469 women. A total of 129 (27.5%) women presented LAM co-activation while 50 (10.7%) showed head regression. Only 15 (3.2%) women showed simultaneous head regression and LAM co-activation. Women with coexisting LAM co-activation and head regression had the narrowest AoP at Valsalva in comparison with other study groups (p < .001). In addition, they had the highest risk of Cesarean delivery (40%) and longest first, second, and active second stage durations, although none of these reached statistical significance. CONCLUSION In nulliparous women at term before the onset of labor fetal head regression and LAM co-activation at Valsalva are two distinct phenomena that uncommonly coexist.
Collapse
Affiliation(s)
- Aly Youssef
- Obstetric Unit, Department of Medical and Surgical Sciences, IRCCS Sant'Orsola-Malpighi University Hospital, University of Bologna, Bologna, Italy
| | - Elena Brunelli
- Obstetric Unit, Department of Medical and Surgical Sciences, IRCCS Sant'Orsola-Malpighi University Hospital, University of Bologna, Bologna, Italy
| | - Marta Fiorentini
- Obstetric Unit, Department of Medical and Surgical Sciences, IRCCS Sant'Orsola-Malpighi University Hospital, University of Bologna, Bologna, Italy
| | - Gianluigi Pilu
- Obstetric Unit, Department of Medical and Surgical Sciences, IRCCS Sant'Orsola-Malpighi University Hospital, University of Bologna, Bologna, Italy
| | - Ahmed El-Balat
- Department of Obstetrics and Gynecology, Goethe University Frankfurt, Frankfurt, Germany
| |
Collapse
|
4
|
Lau SL, Kwan A, Tse WT, Poon LC. The use of ultrasound, fibronectin and other parameters to predict the success of labour induction. Best Pract Res Clin Obstet Gynaecol 2021; 79:27-41. [PMID: 34879989 DOI: 10.1016/j.bpobgyn.2021.10.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 10/31/2021] [Indexed: 01/03/2023]
Abstract
Induction of labour is a common obstetrical procedure and is undertaken when the benefits of delivery are considered to outweigh the risks of continuation of pregnancy. However, more than one-fifth of induction cases fail to result in vaginal births and lead to unplanned caesarean deliveries, which compromise the birth experience and have negative clinical and resource implications. The need for accurate prediction of successful labour induction is increasingly recognised and many researchers have attempted to evaluate the potential predictability of different factors including maternal characteristics, Bishop score, various biochemical markers and ultrasound markers and derive predictive models to address this issue.
Collapse
Affiliation(s)
- So Ling Lau
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - Angel Kwan
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - Wing Ting Tse
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - Liona C Poon
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong.
| |
Collapse
|
5
|
Youssef A, Brunelli E, Pilu G, Dietz HP. The maternal pelvic floor and labor outcome. Am J Obstet Gynecol MFM 2021; 3:100452. [PMID: 34365028 DOI: 10.1016/j.ajogmf.2021.100452] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 07/13/2021] [Accepted: 07/20/2021] [Indexed: 12/29/2022]
Abstract
Vaginal birth is the major cause of pelvic floor damage. The development of transperineal ultrasound has improved our understanding of the relationship between vaginal birth and pelvic floor dysfunction. The female pelvic floor dimensions and function can be assessed reliably in pregnant women. Maternal pushing associated with pelvic floor muscle relaxation is the central requirement of vaginal birth. Many studies have evaluated the role of the pelvic floor on labor outcomes. Smaller levator hiatal dimensions and incomplete or absent levator ani muscle relaxation seem to be associated with a longer duration of the second stage of labor and a higher risk of cesarean and operative deliveries. Here, we presented an overview of the current knowledge of the correlation between female pelvic floor dimension and function, as assessed by transperineal ultrasound, and labor outcome.
Collapse
Affiliation(s)
- Aly Youssef
- Obstetric Unit, Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy (Drs Youssef, Brunelli, and Pilu); Istituto di Ricovero e Cura a Carattere Scientifico Azienda Ospedaliero-Universitaria S. Orsola-Malpighi, Bologna, Italy (Drs Youssef, Brunelli, and Pilu).
| | - Elena Brunelli
- Obstetric Unit, Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy (Drs Youssef, Brunelli, and Pilu); Istituto di Ricovero e Cura a Carattere Scientifico Azienda Ospedaliero-Universitaria S. Orsola-Malpighi, Bologna, Italy (Drs Youssef, Brunelli, and Pilu)
| | - Gianluigi Pilu
- Obstetric Unit, Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy (Drs Youssef, Brunelli, and Pilu); Istituto di Ricovero e Cura a Carattere Scientifico Azienda Ospedaliero-Universitaria S. Orsola-Malpighi, Bologna, Italy (Drs Youssef, Brunelli, and Pilu)
| | - Hans Peter Dietz
- Sydney Medical School Nepean, Department of O&G, University of Sydney, Penrith, New South Wales, Australia (Dr Dietz)
| |
Collapse
|
6
|
Youssef A, Brunelli E, Azzarone C, Di Donna G, Casadio P, Pilu G. Fetal head progression and regression on maternal pushing at term and labor outcome. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2021; 58:105-110. [PMID: 32730691 DOI: 10.1002/uog.22159] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 07/13/2020] [Accepted: 07/22/2020] [Indexed: 06/11/2023]
Abstract
OBJECTIVES The aim of our study was two-fold. First, to evaluate the association between the change in the angle of progression (AoP) on maternal pushing and labor outcome. Second, to assess the incidence and clinical significance of the reduction of AoP on maternal pushing. METHODS This was a prospective cohort study of nulliparous women with singleton pregnancy at term. AoP was measured at rest and on maximum Valsalva maneuver before the onset of labor, and the difference between AoP on maximum Valsalva and that at rest (ΔAoP) was calculated for each woman. Following delivery and data collection, we assessed the association between ΔAoP and various labor outcomes, including Cesarean section (CS), duration of the first, second and active second stages of labor, Apgar score and admission to the neonatal intensive care unit (NICU). The prevalence of women with reduction of AoP on maximum Valsalva maneuver (AoP-regression group) was calculated and its association with the mode of delivery and duration of different stages of labor was assessed. RESULTS Overall, 469 women were included in the analysis. Among these, 273 (58.2%) had spontaneous vaginal birth, 65 (13.9%) had instrumental delivery and 131 (27.9%) underwent CS. Women in the CS group were older, had narrower AoP at rest and on maximum Valsalva, higher rate of epidural administration and lower 1-min and 5-min Apgar scores in comparison with the vaginal-delivery group. ΔAoP was comparable between the two groups. On Pearson's correlation analysis, AoP at rest and on maximum Valsalva maneuver had a significant negative correlation with the duration of the first stage of labor. ΔAoP showed a significant negative correlation with the duration of the active second stage of labor (Pearson's r, -0.125; P = 0.02). Cox regression model analysis showed that ΔAoP was associated independently with the duration of the active second stage (hazard ratio, 1.014 (95% CI, 1.003-1.025); P = 0.012) after adjusting for maternal age and body mass index. AoP reduction on maximum Valsalva was found in 73 (15.6%) women. In comparison with women who showed no change or an increase in AoP on maximum Valsalva, the AoP-regression group did not demonstrate significant difference in maternal characteristics, mode of delivery, rate of epidural analgesia, duration of the different stages of labor or rate of NICU admission. CONCLUSIONS In nulliparous women at term before the onset of labor, narrower AoP at rest and on maximum Valsalva, reflecting fetal head engagement, is associated with a higher risk of Cesarean delivery. The increase in AoP from rest to Valsalva, reflecting more efficient maternal pushing, is associated with a shorter active second stage of labor. Fetal head regression on maternal pushing is present in about 16% of women and does not appear to have clinical significance. © 2020 International Society of Ultrasound in Obstetrics and Gynecology.
Collapse
Affiliation(s)
- A Youssef
- Department of Obstetrics and Gynecology, IRCCS, Sant'Orsola Malpighi University Hospital, University of Bologna, Bologna, Italy
| | - E Brunelli
- Department of Obstetrics and Gynecology, IRCCS, Sant'Orsola Malpighi University Hospital, University of Bologna, Bologna, Italy
| | - C Azzarone
- Department of Obstetrics and Gynecology, IRCCS, Sant'Orsola Malpighi University Hospital, University of Bologna, Bologna, Italy
| | - G Di Donna
- Department of Obstetrics and Gynecology, IRCCS, Sant'Orsola Malpighi University Hospital, University of Bologna, Bologna, Italy
| | - P Casadio
- Department of Obstetrics and Gynecology, IRCCS, Sant'Orsola Malpighi University Hospital, University of Bologna, Bologna, Italy
| | - G Pilu
- Department of Obstetrics and Gynecology, IRCCS, Sant'Orsola Malpighi University Hospital, University of Bologna, Bologna, Italy
| |
Collapse
|
7
|
The role of the angle of progression in the prediction of the outcome of occiput posterior position in the second stage of labor. Am J Obstet Gynecol 2021; 225:81.e1-81.e9. [PMID: 33508312 DOI: 10.1016/j.ajog.2021.01.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 01/20/2021] [Accepted: 01/20/2021] [Indexed: 01/06/2023]
Abstract
BACKGROUND Occiput posterior position is the most frequent cephalic malposition, and its persistence at delivery is associated with a higher risk of maternal and perinatal morbidity. Diagnosis and management of occiput posterior position remain a clinical challenge. This is partly caused by our inability to predict fetuses who will spontaneously rotate into occiput anterior from those who will have persistent occiput posterior position. The angle of progression, measured with transperineal ultrasound, represents a reliable tool for the evaluation of fetal head station during labor. The relationship between the persistence of occiput posterior position and fetal head station in the second stage of labor has not been previously assessed. OBJECTIVE This study aimed to evaluate the role of fetal head station, as measured by the angle of progression, in the prediction of persistent occiput posterior position and the mode of delivery in the second stage of labor. STUDY DESIGN We recruited a nonconsecutive series of women with posterior occiput position diagnosed by transabdominal ultrasound in the second stage of labor. For each woman, a transperineal ultrasound was performed to measure the angle of progression at rest. We compared the angle of progression between women who delivered fetuses in occiput anterior position and those with persistent occiput posterior position at delivery. Receiver operating characteristics curves were performed to evaluate the accuracy of the angle of progression in the prediction of persistent occiput posterior position. Finally, we performed a multivariate logistic regression to determine independent predictors of persistent occiput posterior position. RESULTS Overall, 63 women were included in the analysis. Among these, 39 women (62%) delivered in occiput anterior position, whereas 24 (38%) delivered in occiput posterior position (persistent occiput posterior position). The angle of progression was significantly narrower in the persistent occiput posterior position group than in women who delivered fetuses in occiput anterior position (118.3°±12.2° vs 127.5°±10.5°; P=.003). The area under the receiver operating characteristics curve was 0.731 (95% confidence interval, 0.594-0.869) with an estimated best cutoff range of 121.5° (sensitivity of 72% and specificity of 67%). On logistic regression analysis, the angle of progression was found to be independently associated with persistence of occiput posterior position (odds ratio, 0.942; 95% confidence interval, 0.889-0.998; P=.04). Finally, women who underwent cesarean delivery had significantly narrower angle of progression than women who had a vaginal delivery (113.5°±8.1 vs 128.0°±10.7; P<.001). The area under the receiver operating characteristics curve for the prediction of cesarean delivery was 0.866 (95% confidence interval, 0.761-0.972). At multivariable logistic regression analysis including the angle of progression, parity, and gestational age at delivery, the angle of progression was found to be the only independent predictor associated with cesarean delivery (odds ratio, 0.849; 95% confidence interval, 0.775-0.0930; P<.001). CONCLUSION In fetuses with occiput posterior at the beginning of the second stage of labor, narrower values of the angle of progression are associated with higher rates of persistent occiput posterior position at delivery and a higher risk of cesarean delivery.
Collapse
|
8
|
Kamel R, Garcia FSM, Poon LC, Youssef A. The usefulness of ultrasound before induction of labor. Am J Obstet Gynecol MFM 2021; 3:100423. [PMID: 34129996 DOI: 10.1016/j.ajogmf.2021.100423] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 05/19/2021] [Accepted: 05/26/2021] [Indexed: 12/13/2022]
Abstract
The indications for induction of labor have been consistently on the rise. These indications are mainly medical (maternal or fetal) or social or related to convenience or maternal preferences. With the increase in the prevalence of these indications, the incidence rates of induction of labor are expected to rise continuously. This poses a substantial workload and financial burden on maternity healthcare systems. Failure rates of induction of labor are relatively high, especially when considering the maternal, fetal, and neonatal risks associated with emergency cesarean deliveries in cases of failure. Therefore, it is essential for obstetricians to carefully select women who are eligible for induction of labor, particularly those with no clinical contraindication and who have a reasonable chance of ending up with a successful noncomplicated vaginal delivery. Ultrasound has an established role in the various areas of obstetrical care. It is available, accessible, easy to perform, and acceptable to the patient. In addition, the learning curve for skillful obstetrical ultrasound scanning is rather easy to fulfill. Ultrasound has always had an important role in the assessment of maternal and fetal well-being. Indeed, it has been extensively explored as a reliable, reproducible, and objective tool in the management of labor. In this review, we aimed to provide a comprehensive update on the different applications and uses of ultrasound before induction of labor for the prediction of its success and the potential improvement of its health-related maternal and fetal outcomes.
Collapse
Affiliation(s)
- Rasha Kamel
- Maternal-Fetal Medicine Unit, Department of Obstetrics and Gynecology, Cairo University, Cairo, Egypt (Dr Kamel).
| | - Francisca S Molina Garcia
- Department of Obstetrics and Gynecology, Hospital Clínico San Cecilio, Instituto de Investigación Biosanitaria IBS, Granada, Spain (Dr Molina Garcia)
| | - Liona C Poon
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong, China (Dr Poon)
| | - Aly Youssef
- Obstetric Unit, Department of Medical and Surgical Sciences, University of Bologna and IRCCS Azienda Ospedaliero-Universitaria S.Orsola-Malpighi, Bologna, Italy (Dr Youssef)
| |
Collapse
|
9
|
Predicting cesarean delivery for failure to progress as an outcome of labor induction in term singleton pregnancy. Am J Obstet Gynecol 2021; 224:609.e1-609.e11. [PMID: 33412128 DOI: 10.1016/j.ajog.2020.12.1212] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 12/24/2020] [Accepted: 12/29/2020] [Indexed: 12/21/2022]
Abstract
BACKGROUND Induction of labor is one of the most common interventions in modern obstetrics, and its frequency is expected to continue to increase. There is inconsistency as to how failed induction of labor is defined; however, the majority of studies define success as the achievement of vaginal delivery. Induction of labor in nulliparous women poses an additional challenge with a 15% to 20% incidence of failure, ending in emergency operative deliveries. The Bishop score has been traditionally used before decisions for induction of labor. Nonetheless, it is subjective and prone to marked interobserver variation. Several studies have been conducted to find alternative predictors, yet a reliable, objective method still remains to be introduced and validated. Hence, there is still a need for the development of new predictive tools to facilitate informed decision making, optimization of resources, and minimization of potential risks of failure. Furthermore, a peripartum transperineal ultrasound scan has been proven to provide objective, noninvasive assessment of labor. OBJECTIVE This study aimed to assess the feasibility of developing and validating an objective and reproducible model for the prediction of cesarean delivery for failure to progress as an outcome of labor induction in term singleton pregnancies. STUDY DESIGN This was a prospective observational cohort study conducted in Cairo University Hospitals and University of Bologna Hospitals between November 2018 and November 2019. We recruited 382 primigravidae with singleton term pregnancies in cephalic presentation. All patients had baseline Bishop scoring together with various transabdominal and transperineal ultrasound assessments of the fetus, maternal cervix, and pelvic floor. The managing obstetricians were blinded to the ultrasound scan findings. The method and indication of induction of labor, the total duration of stages of labor, mode of birth, and neonatal outcomes were all recorded. Women who had operative delivery for fetal distress or indications other than failure to progress in labor were excluded from the final analysis, leaving a total of 344 participants who were randomly divided into 243 and 101 pregnancies that constituted the model development and cross-validation groups, respectively. RESULTS It was possible to perform transabdominal and transperineal scans and assess all the required parameters on all study participants. Univariate and multivariate analyses were used for selection of potential predictors and model fitting. The independent predictive variables for cesarean delivery included maternal age (odds ratio, 1.12; P=.003), cervical length (odds ratio, 1.08; P=.04), angle of progression at rest (odds ratio, 0.9; P=.001), and occiput posterior position (odds ratio, 5.7; P=.006). We tested the performance of the prediction model on our cross-validation group. The calculated areas under the curve for the ability of the model to predict cesarean delivery were 0.7969 (95% confidence interval, 0.71-0.87) and 0.88 (95% confidence interval, 0.79-0.97) for the developed and validated models, respectively. CONCLUSION Maternal age and sonographic fetal occiput position, angle of progression at rest, and cervical length before labor induction are very good predictors of induction outcome in nulliparous women at term.
Collapse
|
10
|
Kamel R, Montaguti E, Nicolaides KH, Soliman M, Dodaro MG, Negm S, Pilu G, Momtaz M, Youssef A. Contraction of the levator ani muscle during Valsalva maneuver (coactivation) is associated with a longer active second stage of labor in nulliparous women undergoing induction of labor. Am J Obstet Gynecol 2019; 220:189.e1-189.e8. [PMID: 30321525 DOI: 10.1016/j.ajog.2018.10.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 10/02/2018] [Accepted: 10/07/2018] [Indexed: 10/28/2022]
Abstract
BACKGROUND The Valsalva maneuver is normally accompanied by relaxation of the levator ani muscle, which stretches around the presenting part, but in some women the maneuver is accompanied by levator ani muscle contraction, which is referred to as levator ani muscle coactivation. The effect of such coactivation on labor outcome in women undergoing induction of labor has not been previously assessed. OBJECTIVE The aim of the study was to assess the effect of levator ani muscle coactivation on labor outcome, in particular on the duration of the second and active second stage of labor, in nulliparous women undergoing induction of labor. STUDY DESIGN Transperineal ultrasound was used to measure the anteroposterior diameter of the levator hiatus, both at rest and at maximum Valsalva maneuver, in a group of nulliparous women undergoing induction of labor in 2 tertiary-level university hospitals. The correlation between anteroposterior diameter of the levator hiatus values and levator ani muscle coactivation with the mode of delivery and various labor durations was assessed. RESULTS In total, 138 women were included in the analysis. Larger anteroposterior diameter of the levator hiatus at Valsalva was associated with a shorter second stage (r = -0.230, P = .021) and active second stage (r = -0.338, P = .001) of labor. Women with levator ani muscle coactivation had a significantly longer active second stage duration (60 ± 56 vs 28 ± 16 minutes, P < .001). Cox regression analysis, adjusted for maternal age and epidural analgesia, demonstrated an independent significant correlation between levator ani muscle coactivation and a longer active second stage of labor (hazard ratio, 2.085; 95% confidence interval, 1.158-3.752; P = .014). There was no significant difference between women who underwent operative delivery (n = 46) when compared with the spontaneous vaginal delivery group (n = 92) as regards anteroposterior diameter of the levator hiatus at rest and at Valsalva maneuver, nor in the prevalence of levator ani muscle coactivation (10/46 vs 15/92; P = .49). CONCLUSION Levator ani coactivation is associated with a longer active second stage of labor.
Collapse
|