Gestational Diabetes After Gastric Bypass Surgery

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

120 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-01-01

Study Completion Date

2035-12-31

Brief Summary

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The goal of this trial is to compare different means of glucose monitoring in women with gestational diabetes and a history of gastric bypass surgery.

The main question it aims to answer is:

How does continous glucose monitoring impact the treatment and affect pregnancy outcome in these women.

Participants will be randomized to either continous glucose monitoring or regular capillary glucose measurements during the last trimester of their pregnancy. Researchers will compare the glucose measurement outcomes, the glucose lowering treatment given and pregnancy outcomes between groups.

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Detailed Description

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The project aims to investigate gestational diabetes in women with a history of gastric bypass surgery (GBP). The investigators will analyse glucose levels by using continuous glucose measurement (GCM) or capillary glucose measurements and compare mean glucose values, treatment and the pregnancy outcome.

In Sweden the incidence of gestational diabetes is 2-5% of pregnancies, but the frequency varies greatly in different areas and in different ethnicities. The women with gestational diabetes have an increased risk of complications during pregnancy. The most acknowledged complications are large for gestational age infants (LGA), preeclampsia and caesarean section. The infants have a higher need for neonatal intensive care, due to the risk of hypoglycaemia, hypoxia and jaundice postpartum. Treating gestational diabetes and normalizing glucose values have been proven to reduce risks of unfavourable pregnancy outcome.

Gastric bypass surgery is a common treatment for obesity. The frequency of young women with gastric bypass surgery and concomitant gestational diabetes have increased. Many maternity care centres have started to use a 3-7 day screening for gestational diabetes, since the routine oral glucose toleration test (OGTT) is not recommended after GBP. It is previously shown that women with GBP have a decreased risk of GDM and LGA infants. However, there is an increased risk of small for gestational age (SGA). There is a lack of knowledge and guidelines regarding the optimal treatment of gestational diabetes in these women. How the glucose variability affects pregnancy outcome is poorly investigated. At Lund University Hospital, Region Skane, Sweden, the screening procedure used since 2012 for GDM-screening in women with GBP is a 3 day 7-point capillary glucose measurement. Approximately 25% of the pregnant women with GBP is diagnosed with GDM, using this method at Lund University Hospital.

In this project the investigators will randomize women with gestational diabetes and a history of gastric bypass (GDM-GBP) into two different groups in the last trimester of pregnancy. Both groups are given standard medical care, which includes visits to the Specialized Maternity Care Unit and weekly follow up by the diabetologist. The first group is given continuous glucose measurement (FreeStyle Libre3) and the other group is given standard medical care which includes 7-point capillary glucose measurement. With the CGM system it is possible to collect more comprehensive data regarding glucose values and variability. Previous studies have shown that women with gastric bypass surgery have an earlier than normal postprandial glucose excursion and are more prone to later postprandial hypoglycaemia. During this study, the physician as well as the patient can observe the early glucose excursion after meals and measure time in target, time above target and time below target. Large for gestational age and accelerated growth of the infant is supposed to be due to high glucose values and a high proportion of Time above target. The increased risk of SGA infants in these women is hypothesized to be due to a large proportion of time below target. However, this theory is not sufficiently investigated and it is not known if the use of CGM can help to reduce the risk of weight deviation in the infants.

The investigators want to examine if new technique in glucose measurement can contribute to more favourable pregnancy outcome in women with gestational diabetes and a history of GDM. The main question is if the use of CGM affect pregnancy outcome. The secondary outcomes includes glucose variability and the use of different treatment approaches in GDM in this group of women.

Conditions

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Diabetes, Gestational Gastric Bypass Status for Obesity Complicating Pregnancy, Childbirth, or the Puerperium Pregnancy in Diabetic Blood Glucose Self Monitoring

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Continous glucose measurement

Use of FreeStyle Libre 3, with Libre Link app and Glooko app for measurement and review of glucose measurements.

Group Type OTHER

FreeStyle Libre 2, continous glucose monitoring

Intervention Type DEVICE

The use of FreeStyle Libre 3 sensors and Libre Link app and Glooko app for analysing glucose control in pregnancy

Capillary glucose measurement

Standard care, including capillary glucose measurements and Glooko app for review of glucose measurements.

Group Type NO_INTERVENTION

No interventions assigned to this group

Interventions

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FreeStyle Libre 2, continous glucose monitoring

The use of FreeStyle Libre 3 sensors and Libre Link app and Glooko app for analysing glucose control in pregnancy

Intervention Type DEVICE

Eligibility Criteria

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Inclusion Criteria

* Understands written and spoken Swedish
* Previous Gastric Bypass surgery
* Diagnosed with gestational diabetes according to our local criteria
* Planned follow up at the Specialized Maternity Ward at Skane University Hospital
* Understands the use of CGM and is willing to use the system
* Have signed informed consent