Comprehensive Study Notes on Anemia, Gestational Diabetes, and Hyperemesis Gravidarum

Anemia in pregnancy: Defined as low hemoglobin levels which vary by trimester: - Hemoglobin < 11 g/dL in the first and third trimesters. - Hemoglobin < 10.5 g/dL in the second trimester. - Severe anemia is indicated by hemoglobin levels < 6-8 g/dL.
Consequences: - Reduction in the oxygen-carrying capacity of the blood. - Increased risk of postpartum complications. - Common symptoms include pallor, fatigue, and lethargy.

Iron deficiency anemia is recognized as the most common type of anemia during pregnancy.
Effects on Fetus: - The fetus of an anemic mother generally maintains adequate iron stores. - This results in further depletion of iron stores in the mother.
Preventability and Treatment: - Iron deficiency anemia is preventable and easily treated with iron supplements. - Prenatal vitamins often contain iron. - Treatment guidelines include: - Iron supplementation of 325 mg tablet twice per day. - Note: Foods, coffee, tea, and milk can decrease iron absorption. - Vitamin C can increase absorption.
Recommended Foods: - Whole grains - Dried fruits

Folate is a vitamin, while folic acid is the synthetic supplement form.
The recommended daily intake of folic acid: - 400 mcg for nonpregnant women. - Increased to 600 mcg during pregnancy.
Role of Prenatal Vitamins: - Typically contain more than the required daily intake of folic acid.
Consequences of Deficiency: - Folate deficiency may lead to neural tube defects early in pregnancy. - It can also cause megaloblastic anemia later in pregnancy.
Sources of Folate: - Legumes - Whole grains - Eggs - Citrus fruits

Defined as a recessive, hereditary, familial hemolytic anemia.
Commonly affects individuals of African American or Mediterranean ancestry.
Characterized by: - Recurrent attacks (crises) of fever and pain. - These attacks are often triggered by dehydration, hypoxia, or acidosis.
Recommendations: - Genetic counseling is advised before pregnancy. - Partner testing should be performed to assess the risk of conceiving a child with sickle cell disease vs. sickle cell trait.

Pregestational diabetes: Includes Type 1 or Type 2 diabetes present prior to pregnancy.
Gestational Diabetes Mellitus (GDM): Diagnosed during the course of pregnancy.
Risks Associated with GDM: Infants born to diabetic mothers face higher risks of: - Macrosomia (large size). - Birth trauma. - Hypoglycemia.
Causes of Macrosomia: - Increased insulin production, acting as a growth hormone. - Macrosomia leads to risks of shoulder dystocia, an obstetric emergency.

Recommended for at-risk individuals with: - Obesity. - Hypertension (HTN). - Maternal age over 25 years.
Screening is conducted at 24-28 weeks gestation.

Patient consumes 50 g of glucose, blood glucose is measured 1 hour later. - Negative result (< 130 mg/dL): Routine prenatal care. - Positive result (> 130 mg/dL): Requires a Step 2 test.

Guidelines include: - Patient must be NPO after midnight. - Fasting glucose drawn, followed by consumption of 100 g of glucose. - Blood glucose drawn at 1, 2, and 3 hours after ingestion. - GDM diagnosed when 2 or more values exceed the cutoffs: - Fasting cutoff: 95 mg/dL. - 1-hour cutoff: 180 mg/dL. - 2-hour cutoff: 155 mg/dL. - 3-hour cutoff: 140 mg/dL. - Diagnosis results in a classification of high-risk pregnancy.

Goal of treatment: Strive for strict blood glucose control.
Monitoring: - Blood glucose logs are to be reviewed at every appointment.
Notably, the most critical factor influencing fetal well-being is the mother's euglycemic state.
Recommended lifestyle changes include: - Moderate exercise. - Following a standard diabetic diet, typically around 2000 to 2500 kcal/day. - Dietary counseling from a registered dietician is advisable.

Approximately 25-50% of women with GDM will require either insulin or oral medications despite adherence to dietary recommendations.
ACOG recommendations indicate medication management if fasting glucose remains consistently elevated. Specific thresholds include: - 140 mg/dL at one hour post-meal. - 120 mg/dL two hours post-meal.
Insulin is preferred due to limited research on the long-term effects of oral medications on fetal health.
Oral Medications: - Glyburide and metformin. Glyburide is preferred as it enhances the pancreas's ability to secrete insulin.

Most women with GDM do not require fetal well-being tests.
However, if the patient is on medication for glycemic control, has concurrent hypertension, a history of stillbirth, or suspected macrosomia, they may require bi-weekly fetal testing starting from 32 weeks gestation.

During labor, hourly blood glucose tests are necessary.
The target for blood glucose levels during labor is between 80-110 mg/dL.
Care should be taken to avoid IV solutions containing dextrose, and an insulin IV drip might be necessary.

Infants born to diabetic mothers face a high risk of hypoglycemia.
Newborns will require blood glucose monitoring for 48-72 hours or longer, typically before each feeding.
The hospital will follow established protocols for monitoring.
Mothers may need to maintain dietary control or medication until glucose levels stabilize postpartum: - Approximately 2/3 of women will return to normal glucose levels. - About 1/3 will show some degree of impaired glucose metabolism.

Symptomatic newborns: - Blood glucose < 40 mg/dL requires lab glucose confirmation. - Start IV glucose; consider consulting a neonatologist if symptoms persist. - Symptoms may include irritability, tremors, jitteriness, exaggerated Moro reflex, high-pitched cry, tachypnea, and lethargy.
Asymptomatic newborns: - Monitoring and feeding schedules established; blood glucose should be checked initially and before feeding.

Hyperemesis Gravidarum: Distinction between hyperemesis and normal pregnancy-related nausea and vomiting.
Nausea and vomiting complicate approximately 70% of pregnancies.
Normal nausea typically begins around 4-8 weeks and resolves by 20 weeks gestation.

Nausea and vomiting are classified as hyperemesis when they: - Cause significant weight loss. - Lead to nutritional deficiencies. - Result in ketonuria. - Cause electrolyte imbalances and metabolic alkalosis, such as: - Hypokalemia (low potassium). - Hyponatremia (low sodium). - Hypochloremia (low chloride).

Women unable to maintain oral hydration may require IV hydration.
Clinical manifestations to watch for include: - Dry mucous membranes. - Low blood pressure. - High heart rate. - Poor skin turgor.
Hyperemesis may persist throughout the entirety of pregnancy.
Medication options: - Initial treatments include Pyridoxine (Vitamin B6) either alone or in combination with doxylamine.