Chapter 11: High-Risk Perinatal Care: Preexisting Conditions

High-Risk Perinatal Care: Preexisting Conditions begins with an in-depth analysis of metabolic disorders, specifically diabetes mellitus, categorizing it through White's classification and detailing the dramatic shifts in insulin requirements throughout the gestational period, where needs often drop in the first trimester before rising significantly in the second and third. Management strategies focus on strict glycemic control through diet, exercise, and insulin therapy to mitigate risks like macrosomia, preeclampsia, and congenital malformations. The text then transitions to thyroid dysfunctions, differentiating between hyperthyroidism, often caused by Graves' disease, and hypothyroidism, typically resulting from Hashimoto thyroiditis, and their respective pharmacological treatments. It also covers the critical dietary restrictions required for mothers with phenylalanine hydroxylase deficiency to prevent cognitive impairments in their children. Cardiovascular health is a major focus, covering congenital defects like septal openings and acyanotic lesions, as well as acquired conditions like mitral stenosis and peripartum cardiomyopathy, highlighting how the physiological strain of increased blood volume can lead to cardiac decompensation. The discussion extends to hematologic issues such as iron deficiency and sickle cell anemia, respiratory issues like asthma and cystic fibrosis, and integumentary conditions like intrahepatic cholestasis and polymorphic eruptions. Neurologic disorders, including epilepsy and multiple sclerosis, are examined with a focus on medication safety and seizure control, while autoimmune diseases like systemic lupus erythematosus and myasthenia gravis are analyzed for their potential to flare or impact neonatal health through antibody transfer. Finally, the chapter addresses the sensitive and critical issue of substance use disorder, outlining the maternal and fetal effects of various agents, the importance of universal screening using tools like the 4Ps Plus and CRAFFT, and the complexities of medication-assisted treatment for opioid dependency to improve long-term family stability and neonatal health.