Hypertension in pregnancy

Rule-based expert system for the diagnosis of maternal complications during pregnancy: For low resource settings

Objectives

Maternal complications are health challenges linked to pregnancy, encompassing conditions like gestational diabetes, maternal sepsis, sexually transmitted diseases, obesity, anemia, urinary tract infections, hypertension, and heart disease. The diagnosis of common pregnancy complications is challenging due to the similarity in signs and symptoms with general pregnancy indicators, especially in settings with scarce resources where access to healthcare professionals, diagnostic tools, and patient record management is limited. This paper presents a rule-based expert system tailored for diagnosing three prevalent maternal complications: preeclampsia, gestational diabetes mellitus (GDM), and maternal sepsis.

Methods

The risk factors associated with each disease were identified from various sources, including local health facilities and literature reviews. Attributes and rules were then formulated for diagnosing the disease, with a Mamdani-style fuzzy inference system serving as the inference engine. To enhance usability and accessibility, a web-based user interface has been also developed for the expert system. This interface allows users to interact with the system seamlessly, making it easy for them to input relevant information and obtain accurate disease diagnose.

Results

The proposed expert system demonstrated a 94% accuracy rate in identifying the three maternal complications (preeclampsia, GDM, and maternal sepsis) using a set of risk factors. The system was deployed to a custom-designed web-based user interface to improve ease of use.

Conclusions

With the potential to support health services provided during antenatal care visits and improve pregnant women's health outcomes, this system can be a significant advancement in low-resource setting maternal healthcare.

Pregnancy outcomes of expectant management of stable mild to moderate chronic hypertension as compared with planned delivery

OBJECTIVE

To compare outcomes between elective delivery at 37 weeks of pregnancy and expectant management among pregnant women with mild to moderate chronic hypertension.

METHODS

In a two-center study, 76 women with mild to moderate chronic hypertension were randomly allocated to planned delivery at 37 completed weeks (group A) or expectant management for spontaneous onset of labor or reaching 41 weeks (group B) between April 2012 and October 2013. Differences were compared by t test, χ(2) test, or Fisher exact test. Odds ratios (ORs) with 95% confidence interval (CIs) were determined.

RESULTS

There were no differences in superimposed pre-eclampsia (SPE), severe hypertension, preterm delivery, placental abruption, oligohydramnios, intrauterine growth restriction, or perinatal mortality between the groups. Group B had higher gestational age at delivery (P=0.001) and birth weight (P=0.01), but lower cesarean (OR 3.4; 95% CI, 1.2-10.3; P=0.03) and neonatal care unit admission (OR 5.4; 95% CI, 1.4-21.0; P=0.01) rates. More women with SPE were diagnosed before than after 37 weeks in group B (P=0.01). Overall, patients who developed SPE had more adverse pregnancy outcomes than those who did not.

CONCLUSION

Mild to moderate chronic hypertension could be managed expectantly up to 41 weeks if SPE did not develop.

[Hypertension and pregnancy in Lome (sub-Saharan Africa): epidemiology, diagnosis and risk factors]

AIM

Describe the epidemiology, diagnosis and risk factors of hypertension in pregnant women in Lome.

METHODS

It was a prospective, descriptive and comparative study during 12 months (October 1st, 2011 to September 31st, 2012) on 200 cases of hypertension among 1620 pregnant women, in the department of gynecology and obstetrics at the Tokoin teaching hospital of Lome.

RESULTS

We had 200 cases of hypertension on 1620 pregnant women. The prevalence of hypertension in pregnant women in Lome was 12.3%. The average age of pregnant women was 30±7 years, with extremes of 15 and 44 years. Hypertension was more common (50%) in ages of 30-39 years. The society the most represented were housewives (33.33%), civil servants (16.67%) and traders (16.66%). Hypertension was found incidentally or during a complication especially during the third trimester of pregnancy. Preeclampsia (44%) and pregnancy-induced hypertension (33%) were the most represented. The main risk factors where primiparity (especially older primipars >30ans), nulliparity, familial history of hypertension, low economic level, history of pregnancy-induced hypertension, age >30 years, twinning, obesity and stress.

CONCLUSION

Hypertension in pregnancy is frequent in Lome. A regular follow-up before and after delivery is important according to fetal and maternal complications, and the risk of heart and kidney disease at mild and long outcome.