Objectives: To study the rate of caesarean sections (indications, ratio in emergency and elective caesarean sections) the percentage of vaginal birth after caesarean sections and instrumental deliveries.
Methods: This retrospective study was conducted over a period of one year from 1st January 2018 to 31st December 2018 at the Department of obstetrics and gynaecology, unit 2, Lahore general hospital, Lahore. The data of obstetrical patients who got admitted in the unit and were delivered either vaginally or through abdominal route during the defined study period was recorded and a statistical analysis of various parameters namely the caesarean section rates, its indications, the ratio of emergency and elective caesarean sections, the rate of Vaginal Births after Caesarean Section (VBACS) and instrumental deliveries was done.
Results: The total numbers of obstetrical patients admitted over the study period were 18183. Out of which total deliveries were 6602, vaginal births were 3699 and caesarean sections were 2765. The overall caesarean section rate was 41.88%, elective sections were 473 (17.1%) and emergency sections were 2292 (82.89%). The vaginal births were 3699 (56.02%), VBACS were 98 (2.6%), instrumental deliveries like forcep deliveries were 31 (0.8%) and ventouse deliveries were 47 (1.2%). There were 38 (1.02%) twin deliveries and 59 (1.5%) assisted breech deliveries. The caesarean sections done electively as well as in emergency with different indications were calculated individually.
Conclusion: The rising incidence of caesarean section is most pressing fact of the decade in modern obstetrics. The detailed audit of the caesarean sections done over a year in a tertiary care hospital showed a large number of sections done due to fetal distress. The confirmation of its diagnosis to prevent unnecessary surgeries is pivotal. The previous scars and indications related to them are the most important component in the study so concluding this study to take steps in prevention of primary caesarean section is foremost.
Caesarean section; Indications; Statistical analysis; Vaginal births; Tertiary care hospital
Caesarean section is the most commonly performed surgery all over. The World Health Organization (WHO) has an acceptable caesarean section rate of 5-15% and those countries in which its rate is above 15%, it is considered to be unnecessary use of surgical delivery while countries have caesarean section rate less than 5% are related to lack of access to medical technology. With the advancement and availability of anaesthesia and surgical facilities, there has been an increasing trend of caesarean delivery . Health systems around the world have improved over last 30 years leading to innovations in feto-maternal monitoring during labour and delivery. Early interventions have been related to rising trends of surgical delivery.
Availability of surgical option to more and more patients has changed the perception of a caesarean section. Women opting for caesarean section by choice have become common. Increasing age of mothers in their first pregnancy, educational and financial status of mothers, fear of labour pains and shortening of time spent in labour are major contributing factors towards opting for elective caesarean section. Good experience of a caesarean section is a persuading factor for mothers to opt caesarean delivery again. The safety of anaesthesia and surgery itself has changed the choice of mode of delivery among obstetricians as well. The social pressure of a perfect baby to be born, on mother and obstetrician is imparting a deep effect on obstetrical choices in recent history. The perception of caesarean being safer than vaginal birth is a major contributor to the drastic rise in caesarean section rate all around the world. However, this notion has proved to be incorrect and caesarean delivery has 8 times more mortality and 8 - 12 times morbidity as compared to vaginal birth .
The concept of safe and healthy baby after caesarean section has also been challenged. The fetal risks associated with caesarean section are also higher as compared to vaginal birth. The risks of acute respiratory distress syndrome are higher in those born via elective caesarean section .
According to WHO, the caesarean section rates have risen in all parts of the world (Figure 1). Recent studies show caesarean section rate of 18.6% - almost 1 in 5 women is undergoing caesarean section. The comparison of statistics of 1990 to 2014 show a global rise in caesarean section rate by 12.4%. Dominion Republic, Brazil, Egypt and Turkey have a caesarean section rate of more than 50%.
Figure 1: WHO caesarean section rates.
A retrospective study was carried out for a period of one year from January 1st 2019 to December 31st 2019 at the Department of Obstetrics and Gynaecology, Lahore General Hospital, Lahore. The data of obstetrical patients admitted in the department was analysed by SPSS 25 according to their route of delivery, caesarean section rate was calculated, rates of elective and emergency caesareans was calculated, indications of caesarean section were analysed, ratio of Vaginal Birth after Caesarean Section (VBAC) and instrumental deliveries were also calculated. The data was compared to the data from the same department in last 5years as well.
The total number of antenatal patients who visited antenatal clinics during the study period was 64,578. The total obstetrical patients admitted in the unit were 18,183. Out of the admitted patients, 6602 were delivered. There were 3699 vaginal births and 2765 were caesarean sections. The caesarean section rate was found to be 41.88%. There were 473 (17.1%) elective caesarean sections and Caesarean sections were 2293 (82.89%). The vaginal deliveries were 3699 (56.02%). Out of vaginal births (Figure 2), vaginal births after caesarean section were 98 (2.6%), instrumental deliveries 78 (2%), twin deliveries 38 (1.02%) and assisted breech deliveries 59 (1.5%). Out of instrumental deliveries, forcep deliveries were 31 (0.8%) while ventouse deliveries were 47 (1.2%).
Figure 2: Types of vaginal births.
Emergency caesarean sections (Figure 3) carried out due to fetal distress were 549 (23.95%), failed progress 266 (11.6%), antepartum haemorrhage 85 (3.70%), mal presentations 208 (9.07%), multiple pregnancy 106 (4.62%), failed induction 215 (9.38%), previous caesarean with medical disorder 172 (7.50%), previous caesarean with short interval 162 (7.06%) and previous caesarean section in labour were 535 (23.34%). The indications of elective caesarean sections ere previous 2 caesarean births 175 (36.9%), previous 3 caesarean births were 107 (22.6%), previous 4 caesarean sections were 62 (13.1%), previous 5 caesarean sections were 33 (6.97%), previous 6 caesarean sections were 16 (3.38%), placenta previa was 39 (8.24%) while those with already diagnosed with placenta accrete spectrum/ Morbidly Adherent Placenta (MAP) were 41 (8.24%). The data of 2019 was compared with the statistics of last five years in terms of caesarean section rate with rate of caesarean section in 2014 to 2018 being 28.6%, 30.9%, 34.3%, 37.5% and 41.2% respectively, showing a steady rise over last five years as comparison with 2019 being highest of them all 41.8%.
Figure 3: Types of caesarean births.
The caesarean section rate has been at rise internationally, but previously according to WHO, Pakistan was one of the countries with lowest caesarean section rates along with Afghanistan. In recent years, the obstetrical care in urban Pakistan has improved hence, increasing caesarean section rates . Many countries in south Asian region are following the same international trend and obstetrical practice has changed over the last few decades. The statistical analysis done in Pakistan has shown the similar trend of rise in 2000s [2,5]. In neighbouring South Asian countries, like India, Nepal and Bangladesh statistics show a rise in trends of caesarean section [6,7]. In our study, the caesarean section rate is 41.8% which is high but many countries have a higher rate of caesarean section than this, world-wide the caesarean section rate has been studied and divided into regions according to their wealth and development showing a relatively low rate in our region . The emergency caesarean sections are a big part of total caesarean sections, 82.89% were emergency surgeries in our study. This is a huge burden on emergency services both financially and physically. Many studies carried out all around the world advocate this rise in caesarean sections in emergency . The most common indication for emergency caesarean sections in our study was fetal distress (23.95%). The diagnosis of fetal distress is very controversial, the role of cardiotocogram is limited and invasive testing is important in decision making but in our setup fetal scalp sampling is not available. Hence quarter of caesarean sections done on suspicion of fetal distress. The other important indication is previous caesarean in labour (23.34%). The role of antenatal counselling and birth spacing is noteworthy in prevention of short inter-pregnancy intervals with antenatal and postpartum counselling of couples and proper counselling is important to tell the patients to get elective rather emergency caesarean if already has a known indication. Attitude of pregnant women needs to be changed towards their place of delivery. Failed progress (11.6%) of labour is another important indication which can be decreased with one-on-one monitoring and conscious efforts to prevent failed progress. Failed induction (9.38%) can also be prevented by proper patient selection, priming of cervix prior to medical induction and induction of patients with favourable cervix. As elective caesarean sections were 17.1% of total caesarean sections, more than 80% of the elective caesarean sections were due to previous caesarean section. The caesarean sections carried out due to placenta previa were 8.24% and those due to morbidly adherent placenta were 8.66%. The caesarean sections due to placenta previa and morbidly adherent placenta  has also increased over the last decade due rising caesarean section rate. The incidence of morbidly adherent placenta has also impacted badly on obstetrics of our population and burdened our setups with complicated surgeries.
Out of 3699 vaginal births, only 98 (2.6%) births were Vaginal Births after Caesarean Sections (VBACs). This study shows the vaginal births carried out after caesarean section were very low and trial of labour was not given to patients hence rising caesarean section rate (Figures 4 and 5). Studies advocate the role of proper antenatal counselling about birth spacing, counselling the couple about safety of VBACs if carried out in proper hands and role of proper assessment in labour is important [11,12]. The number of assisted breech deliveries was 59 (1.6%). This shows the inclination of obstetricians towards caesarean as a safe option for delivery of breech babies. Although many international studies, advocate vaginal delivery of suitable patients with breech presentation in both term and pre term patients [13,14]. The training and teaching of young obstetricians in assisted breech delivery can play a role in reducing primary caesarean section rate. Another aspect of reducing caesarean sections due to breech presentation is education of women in late antenatal period about External Cephalic Version (ECV) and implementation of ECV as an effective method of reduced of caesarean sections due to breech presentation .
Figure 4: % age of emergency caesarean births.
Figure 5: % age of elective caesarean births.
Instrumental deliveries were only 78 (2.1%) according to our study. The assisted vaginal deliveries in USA are 1 in 20, estimated to be 5% of total deliveries . The statistics show a large difference between our data and developed world, who have invested in training and skill development of the birth attendants. The art of instrumental deliveries is dying and becoming obsolete due to lack of adequate knowledge and skill of the obstetricians .
The statistical analysis of last five years of our set up shows a steady rise in caesarean section from 28.6% in 2014, 30.9% in 2015, 34.3% in 2016, 37.5% in 2017, 41.2% in 2018 and 41.8% in 2019 (Figure 6). There was sharp rise between 2017 and 2018.Sub division of emergency and elective caesarean sections in 2017 indicates that elective caesareans were 81.7 % and emergency caesarean sections were 18.3 %. Comparison of caesarean section with our neighbouring countries like Bangladesh, shows an increase in last 10years . Worldwide, last decade has shown a rapid rise in delivery via caesarean section more than 20% in both developed and under developed nations. But in our society, the rising caesarean section rate is alarming as it has financial as well as physical constraints on our health system. Rising trend of caesarean sections in our country will have a long- term effect on our generation not only in obstetric terms but later in their gynaecologic implications as well. Repeated surgeries will have adverse effects on the complications in future pregnancies as well as other gynaecological and non - gynaecological surgeries.
Figure 6: Five years review of %age caesarean births.
The rising caesarean section rate in our society depicts change in our obstetric approach. The role of prevention of primary caesarean section is pivotal. Most of the caesareans are being carried out in emergency with relatively increased complications which can be prevented by interventional fetal monitoring like fetal scalp sampling and pH monitoring, also one-on-one monitoring approach can improve vaginal delivery rates in our setup. The emphasis on antenatal and post natal counselling about contraception and birth spacing can reduce the rate of repeat caesarean sections in emergency and elective lists. Trial of labour after caesarean section should be carried out to reduce caesarean section rates and increasing VBAC rate can be done by training of the obstetricians and birth attendants. All patients with breech presentation do not require caesarean delivery. External cephalic version and term or pre term breech delivery should be opted in suitable patients. Use of instrumental delivery in suitable patients should be opted. Training and teaching of birth attendants and obstetricians in dying arts of instrumental delivery and use of safe options in instrumental delivery like ventouse and kiwi cup should be opted to prevent feto- maternal complications. Audit and surveillance of caesarean sections should be carried out annually to identify the preventable causes of caesarean sections.