Gestational diabetes: Difference between revisions

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== Recent Related Research (from [http://www.ncbi.nlm.nih.gov/pubmed/ Pubmed])  ==
== Recent Related Research (from [http://www.ncbi.nlm.nih.gov/pubmed/ Pubmed])  ==
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== References  ==
== References  ==

Revision as of 11:26, 6 June 2017

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Description[edit | edit source]

Gestational Diabetes Mellitus (GDM) is characterised by hyperglycaemia first recognised in pregnancy. Its prevalence varies widely in the literature, but is thought to effect 4-7.5% of all pregnancies Cite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive titleCite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title and is increasing Cite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title more common among older women, obese women and certain ethnic groupsCite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title. It usually presents after the beginning of the second trimesterCite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title.

Pathological Process
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In pregnancy, women develop insulin resistance, which stems from increased maternal adiposity and several hormones produced during pregnancy block the action of insulin at a cellular level, i.e. Tumor Necrosis Factor Alpha, human placental lactogen and placental growth hormone. As a result, blood glucose levels rise and more insulin is produced in response. As the pregnancy develops, the insulin demands increase further, and insulin resistance also increases due to rising levels of pregnancy hormones. However, this is a normal physiological change in pregnancy. Beta cells in the pancreas increase insulin production to compensate for this, and so in normal pregnancy blood glucose level changes are small compared to the large changes in insulin resistance. In GDM, women have been shown to have less of a degree of compensation at the Beta cell than non-GDM women Cite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title. <10% of GDM women have been shown to have antibodies to pancreatic islets of Beta cells in their circulation. It has been postulated thaqt their GDM may stem from autoimmune damage to Beta cells Cite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title. Some GDM cases have been shown to be due to genetic defects in Beta cells Cite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title. Others may be chronic hyperglycaemia first detected at pregnancy, which may explain why most GDM women go on to develop Diabetes Mellitus (DM). The exact mechanism for increased insulin resistance is still largely unclear. Maternal obesity may contribute as upregulation of cytokines and adipokines impacts insulin pathways and skeletal muscle insulin sigalling is impaired Cite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title.

Consequences of Gestational Diabetes Mellitus[edit | edit source]

For Mother[edit | edit source]

GDM is related to higher rates of:

<span style="line-height: 1.5em;" />Pre-eclampsia

Caesarean sectionCite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title

GDM in subsequent pregnanciesCite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title

GDM typically resolves after birth. However, there have been many studies detailing the significantly increased risk of developing DM Type II after having GDM, particularly in the first 5 years postpartum Cite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title.


For Baby[edit | edit source]

  • Macrosomnia: leading to higher rates of injury to mother and baby Cite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title, and higher rates of childhood overweight and obesity Cite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title
  • Fetal hyperglycaemia and hyperinsulinimia
  • Preterm delivery
  • Intensive neonatal care
  • High neonatal body fat percentage
  • Clinical neonatal hypoglycaemia Cite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title

Diagnositc Procedures[edit | edit source]

Risk Factors[edit | edit source]

Several factors have been identified which increase the risk of women developing GDM. These include:

Older age

Ethnicity, namely black, Native American, Pacific Islander, Hispanic, South or East Asian and Indigenous Australian

High pre-pregnancy BMI

Family history of diabetes

Previous GDM

Multigravid women

Excessive weight gain during pregnancy

Short stature

SmokingCite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive titleCite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title


Local regimens use various screening tools in conjunction with these risk factors to identify women in need of further testing.

Screening for Gestational Diabetes Mellitus[edit | edit source]

GDM can only be confirmed by an abnormal glucose tolerance test. The World Health Organisation classify GDM as:

  • A fasting blood glucose level of >7mmol/l
  • A blood glucose level of >7.8mmol/l 2 hours after a 75g glucose drinkCite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title


Medical Management / Interventions
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Diet[edit | edit source]

Dietary interventions have long been a cornerstone of treatement for GDM. Women diagnosed with GDM are routinely referred to a dietician. The challenge of GDM management for dieticians is striking the delicate balance between keeping maternal insulin low without restricting fetal growth. A Cochrane review in 2008 examined 3 trials investigating the effects of diet on preventing GDM, found inconclusive results Cite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title.

Medication[edit | edit source]

When dietary management fails, insulin is considered the safest treatment, as free insulin cannot cross the placenta. Alpha-glucosidase inhibitors (acarbose) and biguanides (metformin) cross placenta but are still used increasingly. However, there are insufficient data to determine the long term effects of these on mother and baby Cite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title.

Weight Management[edit | edit source]

The Role for Physiotherapy
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Physiotherapy in the Management of Gestational Diabetes Mellitus[edit | edit source]


Physiotherapy in the Prevention of Gestational Diabetes Mellitus[edit | edit source]

Resources
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Kim and Ferrera (2010) Gestational Diabetes During and After Pregnancy

Recent Related Research (from Pubmed)[edit | edit source]

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References[edit | edit source]

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