Understanding and Managing Diabetes Mellitus and Metabolic Syndrome

Metabolic Syndrome and Markers

Metabolic syndrome is identified through a cluster of markers that increase cardiovascular risk. Key indicators include:

• Blood Pressure: Systolic above 130 mmHg.
• Lipid Profile: Total cholesterol > 200 mg/dL, triglycerides > 150 mg/dL, LDL > 100 mg/dL, and HDL < 40 mg/dL.
• Blood Sugar: Fasting blood glucose > 100 mg/dL.
• Waist Circumference: 35+ inches for females and 45+ inches for males.

Acute Complications: DKA vs. HHS

When blood glucose levels become uncontrolled, patients may enter life-threatening states. Two primary emergencies are Diabetic Ketoacidosis (DKA) and Hyperosmolar Hyperglycemic State (HHS).

Diabetic Ketoacidosis (DKA)

DKA is defined by uncontrolled hyperglycemia, metabolic acidosis, and increased ketones due to insulin deficiency. It is most common in Type 1 diabetics and is often triggered by infection or illness.

• Classic Signs: The "3 Ps" (polyuria, polydipsia, polyphagia), fruity breath, and Kussmaul respirations (deep, rapid breathing).
• Lab Findings: Glucose > 200 mg/dL, pH < 7.30, and bicarbonate < 18 mEq/L.
• Priority Treatment: Continuous IV regular insulin and aggressive fluid replacement.

Hyperosmolar Hyperglycemic State (HHS)

HHS is characterized by extreme hyperglycemia and sustained osmotic diuresis without significant ketoacidosis. It is most common in older adults with Type 2 diabetes.

• Key Differences: Ketones are absent or low, and acidosis is rare because some circulating insulin is still present.
• Lab Findings: Glucose often exceeds 600 mg/dL, and blood osmolarity may exceed 320 mOsm/L.
• Priority Treatment: Fluid replacement is the #1 priority to restore blood volume.

Pharmacology of Diabetes Management

Insulin Therapy

Insulin is required for Type 1 DM and may be used in Type 2 DM.

Administration Tips:

• Mixing: Always draw up Clear (rapid/regular) insulin before Cloudy (NPH) insulin to prevent contamination.
• Delivery: Options include syringes, insulin pens (useful for visually impaired due to audible clicks), and insulin pumps (which deliver continuous basal rates and mealtime boluses).
• Monitoring: Continuous Glucose Monitors (CGM) use a subcutaneous probe to send real-time data to smartphones or pumps.

Oral and Injectable Agents for Type 2 DM

• Metformin (Biguanide): The first-line oral agent. It decreases hepatic glucose production and improves insulin sensitivity. It does not stimulate insulin secretion, meaning it has a low risk of hypoglycemia when used alone. Warning: It is contraindicated in patients with a creatinine clearance < 30 mL/min due to the risk of lactic acidosis.
• Sulfonylureas (e.g., Glipizide): These stimulate the pancreas to release insulin. The primary side effect is hypoglycemia.
• GLP-1 Receptor Agonists (Incretin Mimetics): Examples include Semaglutide (Ozempic/Rybelsus) and Liraglutide. They mimic natural incretin hormones to enhance glucose-dependent insulin secretion and slow gastric emptying. They also offer cardiovascular benefits.
• DPP-4 Inhibitors (Gliptins): These delay the breakdown of natural incretins. They have a minimal risk of hypoglycemia when used alone.

Hypoglycemia and Hyperglycemia Management

Maintaining homeostasis requires a balance between insulin and glucagon.

Hypoglycemia (Blood Glucose < 70 mg/dL)

Triggers: Exercise, alcohol, or insulin peaks. Symptoms (HIWASH): Headache, Irritable, Weakness, Anxious, Sweaty, Shaky, Hungry. Management:

1. The Rule of 15: If the patient is awake and able to swallow, give 15g of simple carbohydrates, wait 15 minutes, and recheck. Avoid high-fat foods (like peanut butter) initially, as fat slows absorption.
2. Severe/Unconscious: Administer IV D50 (dextrose 50%).
3. Glucagon: For patients who cannot swallow, glucagon can be given via IM, nasal, or subcutaneous routes.

Nursing Alert: Glucagon can induce vomiting. Always position the patient on their side to prevent aspiration.

Hyperglycemia

Triggers: Infection/sepsis, stress, surgery, or skipped insulin. Symptoms: The "3 Ps" (polyuria, polydipsia, polyphagia).

Long-term Complications and Care

Chronic diabetes leads to both macrovascular (stroke, MI, peripheral vascular disease) and microvascular (retinopathy, nephropathy) complications. Neuropathy is a major concern; sensory neuropathy can mask pain, leading to unnoticed foot ulcers.

Foot Care Essentials:

• Inspect feet daily.
• Cut nails straight across.
• Avoid hot baths or heating pads.
• Wear proper shoes and soft cotton socks.