Diabetes Management 2: Hyperglycemia and Hypoglycemia Symptoms and Diagnosis

Overview of Diabetes and Hyperglycemia

  • Diabetes Overview

    • Chronic condition characterized by high blood glucose levels (hyperglycemia).

    • Two main types: Type 1 (auto-immune caused insulin deficiency) and Type 2 (insulin resistance).

  • Insulin Function

    • Insulin helps cells absorb glucose from the bloodstream.

    • In diabetes, insulin secretion and utilization can be impaired, leading to elevated blood glucose.

Symptoms of Hyperglycemia

  • Signs to Monitor

    • Increased Thirst: Despite drinking fluids, individuals may still feel dehydrated due to water loss from cells (higher blood glucose leads to osmotic diuresis).

    • Frequent Urination: High glucose levels lead kidneys to excrete excess glucose through urine, increasing urine output.

    • Dry Skin: Dehydrated cells can lead to skin dryness and reduced ability to sweat.

    • Extreme Hunger: Energy stored as glucose in the bloodstream is not delivered to cells, leading to hunger.

    • Fatigue: Inability to use glucose properly results in a lack of energy.

    • Blurry Vision: Excess glucose pressure on microvasculature (including in the eyes) can cause visual disturbances.

    • Increased Risk of Infections: Chronic hyperglycemia can delay wound healing and increase inflammation.

Acute vs Chronic Hyperglycemia

  • Acute Hyperglycemia

    • Can occur from missing insulin doses or high carbohydrate intake leading to brief peaks in blood sugar.

    • Symptoms may resolve when blood glucose levels return to normal.

  • Chronic Hyperglycemia

    • Slow, progressive elevation in blood glucose can suppress warning signs leading to the body adapting to high blood sugar levels as a new norm.

Long-Term Consequences of Hyperglycemia

  • Chronic hyperglycemia can lead to serious complications:

    • Neuropathy: Damage to nerve endings, particularly in extremities, may cause infections and slow healing.

    • Retinopathy: Damage to blood vessels in the eyes leading to vision loss.

    • Nephropathy: Kidney damage may result in renal failure.

    • Cardiovascular Disease: Increased risk for heart attacks and strokes due to vascular damage.

Diagnosis of Diabetes

  • Diagnostic Tests:

    • A1C Test: Measures average blood sugar over the last 2-3 months.

      • A result greater than 6.5% indicates diabetes.

    • Fasting Plasma Glucose: Greater than 126 mg/dL confirms diabetes.

    • Oral Glucose Tolerance Test (OGTT): A blood sugar level of more than 200 mg/dL two hours after drinking a glucose solution is indicative of diabetes.

Treatment Strategies

  • Management Goals:

    • Aim for an A1C below 7% to reduce risk for complications.

  • Medication:

    • Insulin therapy or other medications to improve insulin sensitivity may be prescribed.

  • Lifestyle Adjustments:

    • Regular exercise and a balanced diet are crucial for blood glucose management.

Understanding Hypoglycemia

  • Signs and Symptoms:

    • Less than 70 mg/dL is generally considered hypoglycemic. Symptoms include shakiness, hunger, irritability, and confusion.

  • Causes of Hypoglycemia:

    • Can occur from taking too much insulin, missing meals while on antihyperglycemic medications, or excessive exercise.

  • Counterregulatory Response:

    • Body reacts to low blood sugar by increasing production of glucose through hormonal responses, typically including glucagon and epinephrine.