Introduction

Appendicitis is a condition characterised by inflammation of the appendix, a small pouch in the lower right side of the abdomen. If you're pregnant and develop appendicitis, it can have significant implications for both you and your baby.¹

The diagnosis of appendicitis can pose a challenge due to the typical anatomical and physiological changes that occur during pregnancy. If not identified promptly, the consequences for both the mother and the foetus can be grave, including risks of sepsis, preterm labour leading to premature birth, and even foetal loss.¹

Appendicitis is a significant surgical concern during pregnancy, accounting for about a quarter of non-obstetric surgeries. Its incidence in pregnant women closely mirrors that of the general population, with rates ranging from 1 in 1400 to 1 in 1500 births. Notably, the majority of affected pregnant women roughly 90% are under 30 years old, aligning with the highest occurrence of appendicitis in the broader population.¹

These statistics underscore the importance of timely diagnosis and intervention in pregnant individuals presenting with symptoms suggestive of appendicitis. Failure to address this condition promptly can have serious implications for both mother and baby.¹

Diagnosis of appendicitis in pregnancy

Diagnosing appendicitis in pregnant women is challenging due to its varied symptoms and the difficulty in pinpointing the appendix's location. Moreover, physiological changes during pregnancy further complicate diagnosis. Late diagnosis, especially of severe cases, can lead to foetal loss. Pregnant women are more prone to complicated appendicitis, with rates as high as 43%-55%, especially in the third trimester. Early diagnosis is crucial, as prompt appendectomy within 24 hours of symptom onset reduces the risk of complications.²

When diagnosing appendicitis in pregnant women, doctors often start with laboratory investigations, which involve checking levels of white blood cells and markers of inflammation in the blood. This helps them get clues about whether the appendix might be inflamed. Ultrasound is usually the first choice for imaging studies because it's safe and easy to do. However, its effectiveness can vary, so sometimes doctors may use MRI scans, which provide detailed images without radiation exposure. The downside is that MRI scans are not always available. CT scans, on the other hand, use radiation, which can be harmful to the baby, so they are used less often. Doctors only turn to CT scans when ultrasound and MRI results are not clear enough to make a diagnosis. Doctors have to carefully weigh the importance of diagnosing the mother's condition quickly with the safety of the baby when deciding which imaging method to use.²

Management strategies for appendicitis during pregnancy

This involves non-operative and surgical approaches, with careful consideration given to maternal and foetal safety. Non-operative management may be attempted initially, including conservative treatment such as close monitoring, intravenous fluids, and antibiotic therapy to reduce inflammation and infection. However, if surgery is necessary, the timing of the procedure is carefully evaluated. While the second trimester is often considered the safest time for surgery, urgency may dictate otherwise, particularly in cases of severe or perforated appendicitis.³

Surgeons may opt for a laparoscopic approach, which involves making small incisions and using specialised instruments. It is preferred for its minimally invasive nature and quicker recovery time. In complex cases or late pregnancy, an open appendectomy may be necessary for better visualisation and control of the surgical site. Anaesthesia choices are crucial, with safety being paramount for both the mother and the foetus. Regional anaesthesia, such as spinal or epidural anaesthesia, is typically preferred to minimise foetal risk. Still, general anaesthesia may be necessary in certain circumstances, with precautions taken to mitigate its effects on the foetus. Overall, the management of appendicitis during pregnancy requires a tailored approach, balancing the need to treat the condition effectively with the safety of both the mother and the baby.³ 

Considerations for mother and baby

Untreated appendicitis during pregnancy poses significant risks to both the mother and baby.  Without timely intervention, there is an increased likelihood of complications such as rupture of the appendix, peritonitis (inflammation of the peritoneum, the thin tissue lining the inner wall of the abdomen and covering most of the abdominal organs) and sepsis. All of these complications can endanger maternal health and lead to adverse foetal outcomes, including preterm birth and foetal loss. Surgery for appendicitis during pregnancy carries inherent risks, including those associated with anaesthesia, surgical procedures, and postoperative recovery.¹ 

Maternal complications may include wound infection, haemorrhage, and adverse reactions to anaesthesia. Foetal complications include preterm labour, foetal distress, and placental abruption, which may arise from the surgical intervention itself. The management of appendicitis during pregnancy can impact foetal outcomes, particularly if complications arise. Delayed diagnosis and treatment of appendicitis can lead to maternal complications that may indirectly affect foetal well-being. Conversely, surgical intervention, while necessary to address maternal health concerns, can also pose risks to the foetus, especially if performed in the third trimester when the uterus is larger and the risk of preterm labour is heightened.²

Multidisciplinary approach and collaborative care

Managing appendicitis during pregnancy necessitates a multidisciplinary approach involving obstetricians, surgeons, anesthesiologists, and neonatologists. Effective care coordination among healthcare providers is essential to optimise maternal and foetal outcomes. This involves thorough communication, shared decision-making, and comprehensive planning to minimise risks and ensure the best possible outcome for the mother and the baby. Patient education and shared decision-making are integral components of managing appendicitis during pregnancy. Expectant mothers should be informed about the risks, benefits, and alternatives of different treatment options, allowing them to participate actively in decision-making with their healthcare providers.⁴ 

Surgeons typically recommend operative treatment for acute appendicitis after thorough discussion and joint decision-making with their patients. This approach is especially favoured for patients with complicated appendicitis or those with appendicolith detected in imaging studies. Laparoscopic appendectomy with open access may be performed when the fundus of the uterus is below the level of the umbilicus, and either laparoscopic or open appendectomy is suitable in the later stages of pregnancy. To minimise the risk of uterine injury, establishing pneumoperitoneum using the open method is preferred over the Veress needle technique. Due to the potential risk of preterm delivery, surgery is best conducted in healthcare facilities equipped with obstetricians/gynaecologists, specialised anesthesiologists, and neonatal care units.⁴

For patients, it is important to understand that the research evidence comparing the effects of operative versus conservative management and laparoscopic versus open surgery for acute appendicitis in pregnancy is limited and of low certainty. While a panel of stakeholders generally recommends surgery in most cases, the decision should ultimately be made collaboratively between the surgeon, the obstetrician/gynaecologist, and the patient.⁴

Conclusion

Diagnosing and managing appendicitis during pregnancy presents unique challenges due to anatomical and physiological changes and the need to consider both maternal and foetal well-being. Timely diagnosis and intervention are crucial to prevent serious complications for both the mother and the baby. Despite the challenges, a multidisciplinary approach involving obstetricians, surgeons, anesthesiologists, and neonatologists ensures comprehensive care and optimal outcomes. Shared decision-making between healthcare providers and patients is essential, considering how important it is to tailor treatment plans to individual circumstances. By following established guidelines and recommendations, healthcare providers can effectively navigate the complexities of appendicitis in pregnancy and provide safe and effective care for expectant mothers. 

Summary

In this comprehensive article, we explore the complex considerations surrounding the diagnosis and management of appendicitis during pregnancy. We highlight the difficult challenges physiological changes pose and the need for prompt intervention to safeguard maternal and foetal health. Emphasising a collaborative approach, we underscore the crucial role of a multidisciplinary team comprising obstetricians, surgeons, anesthesiologists, and neonatologists in coordinating effective care. We advocate for shared decision-making, navigating the intricacies of limited research evidence and individual patient needs to tailor treatment plans. By adhering to established guidelines and fostering ongoing research, we aim to refine diagnostic accuracy, management strategies, and overall patient outcomes in this critical domain of maternal healthcare.

FAQs

Is appendicitis common during pregnancy?

It accounts for about 25% of non-obstetric surgeries during pregnancy.

What are the risks of untreated appendicitis in pregnancy?

Risks include appendiceal rupture, peritonitis, sepsis, preterm labour, and foetal loss.

How is appendicitis diagnosed in pregnant women?

Through laboratory investigations and imaging studies like ultrasound, MRI, or CT scans.

What are the treatment options for appendicitis during pregnancy?

Non-operative management with close monitoring and antibiotics or surgical intervention with appendectomy, depending on severity and gestational age.

Is surgery safe during pregnancy?

Yes, when performed by experienced surgeons in equipped healthcare facilities.

What are the potential complications of surgery for appendicitis in pregnant women?

Anaesthesia-related risks, surgical complications, and foetal complications like preterm labour.

Can appendicitis affect pregnancy outcomes?

Yes, it can lead to preterm birth, foetal loss, and maternal complications.

How can healthcare providers optimise outcomes for pregnant women with appendicitis?

Through a multidisciplinary approach, shared decision-making, adherence to guidelines, and prioritising maternal and foetal safety.