Diabetic ketoacidosis and hyperosmolar hyperglycemic state

Area of Science:

• Endocrinology
• Metabolic Disorders
• Diabetes Mellitus Research

Background:

• Diabetic ketoacidosis (DKA) and hyperosmolar hyperglycemic state (HHS) are severe metabolic emergencies in diabetes mellitus (DM).
• DKA is defined by hyperglycemia, ketosis, and acidosis, often triggered by infection or insulin omission, with stagnant mortality rates (3.4-4.6%).
• HHS presents with profound hyperglycemia and hyperosmolality but minimal ketosis, linked to infection, undiagnosed diabetes, or substance abuse, carrying a high mortality rate (~15%).

Purpose of the Study:

• To elucidate the pathophysiology, precipitating factors, and therapeutic strategies for DKA and HHS.
• To highlight the differing mechanisms and outcomes of these two critical diabetic complications.
• To emphasize the importance of patient education and monitoring in preventing DKA and HHS hospitalizations.

Main Methods:

• Review of pathophysiological mechanisms underlying DKA and HHS.
• Analysis of precipitating factors and clinical manifestations.
• Evaluation of current therapeutic mainstays and preventative measures.

Main Results:

• Both DKA and HHS stem from reduced effective insulin action and increased counterregulatory hormones.
• DKA results from insulin deficiency causing lipolysis and ketogenesis; HHS involves residual insulin action insufficient to prevent hyperglycemia but adequate to suppress ketogenesis.
• Prognosis is poorer in elderly patients (>65 years) and those with coma or hypotension.

Conclusions:

• DKA and HHS share common pathophysiological roots but differ in the degree of dehydration and ketosis.
• Effective management requires intravenous insulin, fluid replacement, and addressing precipitating factors.
• Preventative strategies, including enhanced patient education and home monitoring, can reduce hospital admissions for these largely preventable conditions.