Retrospective evaluation of the impact of second-stage labor arrest on stress urine incontinence in postpartum women

Article Information

Georges Yared MD1,2, Jihad Al Hassan3,4,5, Charlotte Hajjar5,6, Kariman Ghazal MD5,6,7,*

1Associate Professor Obstetrics and Gynecology Department, American Lebanese University,Beirut, Lebanon

2Head of Obstetrics and Gynecology Department,Rafik Hariri Hospital University Medical Center, Beirut, Lebanon

3Head  and Assistant Professor  of Obstetrics and Gynaecology Department, Lebanese University, Beirut, Lebanon

4Head  of Obstetrics and Gynaecology Department, Al Zahraa Hospital University Medical Centre, Beirut, Lebanon

5Obstetrics and Gynecology Department,Rafik Hariri Hospital University Medical Center, Beirut, Lebanon

6Obstetrics and Gynaecology Department, Al Zahraa Hospital University Medical Centre, Beirut, Lebanon

7Assistant Professor  of Obstetrics and Gynaecology Department, Lebanese University, Beirut, Lebanon

*Corresponding Author: Kariman Ghazal, MD, Obstetrics and Gynaecology Department Lebanese University.

Received: 27 September 2022; Accepted: 04 October 2022; Published: 22 October 2022

Citation:

Georges Yared, Jihad Al Hassan, Charlotte Hajjar, Kariman Ghazal. Retrospective evaluation of the impact of second-stage labor arrest on stress urine incontinence in postpartum women. Obstetrics and Gynecology Research 5 (2022): 254-260.

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Abstract

Background: Stress Urinary Incontinence (SUI), has been always linked to normal vaginal delivery (NVD) or operative vaginal delivery (OVD). Many women get concerned about this issue before giving birth and tend to deliver by cesarean delivery. However, the increased frequency of cesarean deliveries poses health concerns especially in the absence of solid risk factors.

Methods: This is a retrospective observational cohort study conducted at Rafic Hariri University Hospital (RHUH) between 2011 and 2013. Forty primiparous women undergoing cesarean delivery were involved. They were evenly divided into 2 groups. The first involved those who underwent elective cesarean delivery and those with failure to progress. The second group involved women who underwent cesarean delivery for arrested second stage of labor. Statistical analysis was performed using the statistical program SPSS version 20.

Results: The prevalence of SUI in group 1 was 25% compared to 35% in group 2. Cesarean delivery was not found to have any protective role against SUI in group 1 patients and the frequency of SUI in selective cesarean patients was nearly the same as those performing cesarean for failure to progress. However, patients undergoing cesarean for arrested second stage of labor > 2hours had a significant higher frequency of SUI as compared to patients undergoing cesarean delivery for arrested second stage of labor < 2hours.

Conclusion: Cesarean delivery cannot be proposed to women who fear to suffer from SUI post-partum. However, it should be done if the cervix fully dilated for > 2hours in order to decrease the risk of SUI.

Keywords

Stress Urinary Incontinence normal delivery cesarien

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Article Details

Introduction:

Stress urine incontinence is seen as a serious issue and a serious health concern that can harm both mental and physical health. Limited physical activity and absenteeism have been linked to it, increasing the economic and financial burden on the community. Stress urine incontinence has traditionally been linked to vaginal birth. The continence mechanism seems to be most affected by the first vaginal delivery. It is widely established that parity may also have an impact on the pelvic floor, causing connective tissue and muscle disturbance and a rise in the prevalence of stress incontinence [13].

The pelvic visceral organs are supported by the pelvic floor muscles, especially the levator ani muscles, which are also crucial for maintaining urine continence [3]. These muscles can quickly contract to maintain continence during an acute intraabdominal pressure and then release after evacuation [4]. Physically, the absence of support for the urethra and bladder neck from the pelvic floor muscles and vaginal connective tissue results in urethral hypermobility. As a result, the urethra and bladder neck won't be able to close against the anterior vaginal wall [5].

The urethra may lose mechanical support as a result of trauma to the pelvic floor muscles and nerve damage during childbirth. It is yet unknown what biological processes cause injury to the pelvic floor during pregnancy and childbirth [6]. Pudendal nerve damage, which is typically brought on by surgical vaginal birth Among the explanations put up include OVD, a prolonged second stage of labor, and large birth weight [7]. According to some hypotheses, NVD regular vaginal birth and a drawn-out second stage of labor can harm the levator ani and coccygeus muscles [8]. For instance, alterations in collagen and elastin may play a part in the pathophysiology of SUI [9].

Between 15% and 55% of persons experience SUI. Pregnancy and childbirth account for 50% of the causes of stress urine incontinence in parous women, particularly premenopausal women; however, in postmenopausal women, age seems to balance out the effect of parity [10]. Risk factors for SUI include obesity [11], non-Hispanic ethnicity, and high-impact sports like jumping.

The prevalence of cesarean births has increased recently despite the creation of obstetric practice guidelines. The protective effects of elective cesarean delivery are being debated by both the medical and lay sectors.

Objective

It is important to understand whether failure to advance and a paused second stage of labor lasting longer than two hours are risk factors for SUI, as well as when the pregnancy was terminated by cesarean birth. In addition, the proportion of patients with an arrested second stage of labor who underwent a cesarean section in under two hours compared to those who underwent a cesarean section in excess of two hours.

Aim:

The primary objective of our study is to emphasize the value of C|S and NVD in identifying SUI during pregnancy.

Materials

40 primigravida women who needed cesarean deliveries between 2011 and 2013 were the subject of a retrospective cohort observational study at Rafic Hariri University Hospital. The participants were equally divided into two groups.

  1. a) Women who elect to have cesarean births or who experience complications
  2. b) Women who have cesarean sections because their second stage of labor has been halted.

Inclusion criteria:

Term cesarean deliveries by primiparous women between the ages of 18 and 30

Exclusion criteria:

  1. Women who become pregnant within the first two years of having a cesarean section are excluded from the study.
  2. We were unable to reach the women.
  3. Ladies who experienced incontinence while pregnant or before having their first cesarean section.
  4. Ladies who have had pelvic surgery before (ex dilation and curettage, myomectomy)
  5. Estimated fetal weight > 5 kg for mothers who are not diabetic, > 4.5 kg for women who are, and 2 kg.
  6. Epidural sedation.

METHODS

Data Collection:

After a two-year follow-up period, 40 primigravida women were contacted by phone, and only those who met the inclusion requirements were chosen. We gained oral consent prior to the study's commencement by outlining its objectives. A validated questionnaire was then given to the patients to complete. Tables with the data were created. The obstetric history of participants was gathered from the hospital's medical records after receiving IRB approval from RHUH.

Data analysis:

Retrospective data collection was done on 40 patients who met the aforementioned inclusion and exclusion criteria. A licensed statistician carried out the statistical analysis. He made use of SPSS version 20 for statistics. Categorical variables were subjected to the Chi-Square Square test. A p-value of less than 5% indicates the existence of a statistically significant relationship.

Results

We were able to review the medical records of primigravida women who underwent cesarean delivery between 2011 and 2013 after receiving permission from the RHUH Institutional Review Board.

121 ladies who fit the inclusion requirements were recruited. 37 of these 121 were dropped because their medical records didn't meet certain requirements (for example baby weight, exact delay in second stage of labor, and accurate measurement of cervical dilation). 84 women were left, 72 of whom qualified for group 1 (elective cesarean or cesarean for failure to progress), and 12 qualified for group 2. (cesarean for arrested second stage of labor).

Until we hit our target of 20 women responding, we randomly began contacting each of these 72 women and completed the survey. 34 people were contacted in all. Home relocation and phone number changes were the main causes of the lack of a response.

Table 1 shows prevalence of SUI in group 1 patients along other variables whose ratio of correlation with SUI incidence was calculated.

The prevalence of SUI was 5/20 (25%). Out of these 5 patients with SUI one of them has underwent elective cesarean while the others have underwent cesarean for failure to progress.

When age was studied as a potential risk factor, the correlation ratio was r=0.164. As such, age is a weak risk factor for SUI. Similarly, baby weight and gestational period were found to have r=0.088 and r=0.57 respectively which proves baby weight is a very weak risk factor while gestational age is a moderate risk factor.

As a conclusion, age and baby weight cannot be considered as risk factors for SUI, but increase in gestational age is associated with increased occurrence of SUI.

Table 1: SUI frequecy in women in patients performing c-section post failure to progress or elective c-section

Patient

Age

Gestation

Cervical dilation

Baby weight

SUI

1

19

40

elective

2.5

yes

2

21

36+4

4cm for 7hr

3.9

yes

3

30

36+5

4cm for 6hr

4.2

yes

4

29

38+2

1cm for 12hr

2.7

yes

5

29

38+5

2cm for 10hr

2.9

yes

6

18

40+4

1.5cm for 4hr

3.2

No

7

18

40+1

1cm for 5hr

3.7

No

8

18

42

4cm for 4hr

3.7

No

9

19

39+6

3cm for 5hr

2.4

no

10

19

39

1cm for 5hr

3.2

no

11

20

37+1

elective

3

No

12

21

40+3

4cm for 6hr

3

no

13

24

40+3

4cm for 4hr

3.3

No

14

25

40+4

elective

4

No

15

25

40

2cm for 5hr

4.2

No

16

26

37+4

elective

2.8

No

17

27

40+2

elective

3.2

No

18

27

39+4

3cm for 5hr

3.3

No

19

28

38+4

Elective

2.9

No

20

28

40+4

4cm for 9hr

3.2

No

Table 2: SUI frequency in women performing c-section for arrested 2nd stage of l

Patient

Age

Gestation

Baby weight

Indication for C-section

SUI

1

18

40+2

3.9

4hr

yes

2

19

40+4

2.8

4hr

yes

3

21

41+3

4

2hr

yes

4

24

38+4

2.9

4hr

yes

5

29

40+2

3.9

2.5hr

yes

6

30

36+2

2

3hr

yes

7

30

39+3

3.6

4hr

yes

8

18

40+3

3.5

3hr

no

9

18

42+2

3.8

2hr

no

10

19

40+5

3.2

2hr

no

11

21

39+2

3.2

2.5

no

12

22

40+1

3.9

2hr

no

13

23

39+3

3.1

2hr

no

14

24

40+4

2.9

2.5hr

no

15

25

40+2

2.7

2hr

no

16

26

40+3

2.5

1hr

no

17

26

40+4

3

3hr

no

18

27

40+1

3.5

1.5hr

no

19

30

40

3

3hr

no

20

30

36+6

3.2

2hr

no

fortune-biomass-feedstock

YES 25%, NO 75%

Fig. 1: Pie chart illustrating frequency of SUI in Group 1 patients.

Yes: presence of SUI, No: absence of SUI

This is a pie chart showing frequency of SUI in group 1 of 25% (n=5). It does not take into consideration the cause of cesarean delivery whether failure to progress or upon maternal request. We compared frequency of SUI in patients of group 1 undergoing cesarean delivery for failure to progress (n=14) to the frequency of SUI in all patients of group 1 (n=20). The goal of this comparison is to know if elective cesarean delivery had any protective role as compared to failure to progress and if failure to progress by itself is a risk factor for SUI. P value was also calculated.

fortune-biomass-feedstock

YES 29%, NO 71%

Fig. 2: Frequency of SUI in non-elective cesareans of Group 1 (4/14)

YES: presence of SUI in women undergoing cesarean delivery for failure to progress (4/14)

NO: absence of SUI in women undergoing cesarean for failure to progress (10/14)

We found that the frequency of SUI increased from 25% to 29%.

P value=0.5976

fortune-biomass-feedstock

YES 35%, NO 65%

Fig. 3: pie chart illustrating frequency of SUI in Group 2

YES: presence of SUI. NO: absence of SUI

This is a pie chart showing frequency of SUI in group 2 of 35% (n=7).

The frequency of SUI in group 2 is higher by 10% than group 1.

group 2 was divided into 2 subgroups. Group a included patient who underwent cesarean within 2 hours of pushing post full dilation of the cervix. Group b included patients who underwent cesarean after 2 hours of pushing post full dilation of the cervix. Similarly, the frequency of SUI in both subgroups was calculated and p value was obtained

fortune-biomass-feedstock

YES 11% NO 89%

Fig. 4: Frequency of SUI in subgroup A (1/9)

YES: presence of SUI in women with arrested 2nd stage of labor for less than or equal to 2 hours.

NO: absence of SUI in women with arrested 2nd stage of labor for less than or equal to 2 hours.

Out of 9 patients having arrested second stage of labor for less than or equal to 2 hours only 1 patient had SUI.

fortune-biomass-feedstock

YES (54%), NO 46%

Fig. 5: Frequency of SUI in subgroup B (6/11)

YES: presence of SUI in patients with arrested second stage of labor for more than 2 hours

NO: absence of SUI in patients with arrested second stage of labor for more than 2 hours

Out of 11 patients having arrested second stage of labor for more than 2 hours, 6 of them had SUI (54%)

P value=0.01803

DISCUSSION

To summarize, in our retrospective cohort study 40 primiparous women undergoing cesarean delivery were recruited and divided equally into 2 subgroups. The 1st group included those undergoing cesarean delivery either electively or for failure to achieve full cervical dilation. The 2nd group included those undergoing cesarean delivery for failure of baby descent despite full cervical dilation. The frequency of SUI was 25% in group 1 and 35% in group 2. Other risk factors like maternal age, gestational age and baby weight were also studied to see if they are potential risk factors. They all proved to have weak correlation with the occurrence of SUI in both groups. Thus, the difference in frequency is insignificant. This means group 1 containing elective cesareans and cesareans for failure to progress, is statistically homogeneous. Hence, elective cesarean has no protective role against SUI as compared to cesarean for failure to progress. In addition, failure to progress is not a risk factor for SUI as well.

These findings agree with Hung-yen Chin et al and Thorp et al concerning the non-protective role of elective cesarean delivery [16, 17]. According to them maternal age (>30), smoking, and a high BMI before pregnancy are indicators of developing postpartum urine incontinence. However, this does not rule out the possibility of postpartum stress urine incontinence in women who are older at the time of delivery. Because pregnancy has been demonstrated to enhance the prevalence of stress incontinence relative to nulliparous women [18], a cesarean cannot provide total protection against postpartum stress urine incontinence [17]. There was no statistical difference between vaginal and C-sections performed for obstetric reasons.

In comparison to elective cesareans, they discovered that cesareans performed for protracted and halted labor were associated with a greater incidence of postpartum stress incontinence. Another thing to consider is if the push power plays a role in the style of birth, itself, be a risk factor for future stress incontinence.

According to Gartland et al.2012, cesarean sections performed before labor and before the onset of the second stage of labor were associated with lower rates of stress incontinence than spontaneous vaginal delivery, whereas cesarean sections performed after the second stage of labor were associated with a lower likelihood of reporting to prevent one of them from developing postpartum stress urinary stress incontinence, however there was no statistical difference between vaginal and cesarean birth [19].On the other hand, cesarean delivery was found to have a protective role when performed within the 1st 2 hours of full cervical dilation.

Similar results were found by Sultan et al When compared to the elective cesarean group, they found that women who underwent a cesarean after the commencement of labor were more likely to acquire pudendal nerve injury [20, 21]. He stated that pudendal nerve injury occurred mostly on the left side, with NVD and labor being the main risk factors. As a result, he advocated that cesarean births be done on a voluntary basis if the goal was to reduce the risk of SUI.

This was not the case with Donath et al. who found out that there is a minimal increase in the incidence of incontinence when duration of the second stage extends from 0 to 5 hours, but without having any major statistical difference [22].

When compared to vaginal delivery, Farrell et al. discovered that cesarean delivery at any stage of labor has a lower risk of developing SUI. As a result, the timing of a C-section during labor and delivery appears to be a significant modifiable risk factor for postpartum stress urine incontinence.

Nevertheless, Gimosky et al. concluded that prolonged second stage of labor beyond current guidelines decreased the incidence of cesarean delivery by 55% and did not have negative impact on maternal and neonatal risks [23].

So, how long should women be allowed to push before opting for caesarean section?

According to him delaying surgery beyond current guidelines in situations of extended second-stage labor, reduced the incidence of c - section by 55%. It had a deleterious impact on women, though. Postpartum hemorrhage, chorioamnionitis, and third and fourth-degree degree perineal lacerations were among the conditions. When the second stage in this process is prolonged, Sandstorm et al. 2016 found an increased relative risk of having many infant problems (ischemic hypoxic encephalopathy, meconium aspiration syndrome, seizures, and NICU admissions) [24] He, argued that in order to protect neonates, current standards for performing a timed cesarean birth in women with a long second stage of labor must be followed. we stated that we want to find out if frequency of SUI increases with increasing time post full cervical dilation The effect on babies, on the other hand, was limited.

One of the main limitations was that most if not all of our patients belonged to low socioeconomic status and all of them were of Syrian nationality with low educational background ,were refugees this made it difficult to contact them due to frequent house translocation and change in phone number. and the meaning of the questions in the questionnaire was hard to convey. This fact prevented us from scaling the severity of SUI in these patients and limited us with “yes or no” answers.

Several studies like sultan et al [24] relied on objective tests to assess SUI in addition to standardized questionnaires. These tests included pudendal nerve motor terminal latency test, cough stress test and cotton swab test. They were performed at regular intervals post-delivery. We were not able to conduct such tests due to lack of means and experience in addition to high possibility of loss of follow up throughout the study.

Conclusions

Stress Urinary incontinence (SUI) is a common clinical condition worldwide that affects women of all ages and across different cultures and races. It is associated with debilitating impact on quality of life and in certain cases can increase the risk of depression when it becomes so severe.. However, it is important to know if failure to achieve a full dilation during the first stage of labor, and the inability of the baby to descent through the birth canal during the second stage of labor, could be considered as major risk factors for the development of post-partum SUI if pregnancy was terminated by cesarean delivery.

Nevertheless, the fact that some studies proved opposite results while others confirmed our findings poses the challenge to conduct further studies with minimized bias and larger samples in order to build solid conclusions concerning this major health problem.

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