Summary
Highlights
Nurse Mike introduces Diabetes Mellitus (Type 1 and Type 2), emphasizing key NCLEX points and memory tricks. He explains that high sugar over time destroys vital organs and blood vessels, leading to kidney failure, nerve damage, blindness, and high blood pressure. He clarifies that DM is not Diabetes Insipidus nor is it related to 'direct messages'.
The video explains that when we eat, the pancreas releases insulin to put sugar and potassium into cells. If there's no food, the pancreas releases glucagon to break down stored glucose (glycogen) in the liver, increasing blood sugar. In diabetes, insulin production or function is the core problem.
Type 1 diabetes involves the body killing its own pancreas, resulting in no insulin production. It's an autoimmune, often genetic, disease, making patients insulin-dependent for life. Type 2 diabetes is characterized by insulin resistance, where cells become unresponsive to insulin due to diet and lifestyle choices (high sugars, sedentary habits).
Type 1 diabetes has no specific risk factors as it's largely genetic. For Type 2, lifestyle and some genetics play a role. Metabolic syndrome significantly increases the risk of diabetes, heart disease, and stroke. The BOL acronym helps remember its criteria: Blood pressure (meds or >130 systolic), Blood sugar (meds or fasting >100), Obesity (waist size >35 in for females, >45 in for males), and high Lipids (triglycerides <150, LDL <100, HDL >40).
Three key labs for diagnosing diabetes on the NCLEX are: normal glucose (70-115), fasting glucose (<100), and Hemoglobin A1C (<6.5%). An A1C below 6% indicates controlled sugar, while over 6.5% requires diet, exercise, or insulin revision. Hypoglycemia (<70) is dangerous due to brain death risk.
Hyperglycemia presents with the three Ps: Polyuria (frequent urination), Polydipsia (increased thirst), and Polyphagia (excessive hunger). Causes include sepsis, stress, skipping insulin, and steroids. Hypoglycemia symptoms include headache, irritability, weakness, anxiety, shakiness, and hunger. Treatment for conscious patients involves sugary foods (juice, soda, crackers, low-fat milk), while unconscious patients receive dextrose IV. Always reassess blood sugar after 15 minutes.
Long-term high sugar leads to atherosclerosis, increasing infection risk and damaging organs. Complications include nephropathy (kidney failure, creatinine >1.3), neuropathy (nerve damage, loss of sensation, diabetic feet risking amputation), retinopathy (blindness), hypertension and heart disease, and increased risk of strokes.
For Type 1, insulin is lifelong. For Type 2, diet and exercise are the first line, followed by oral meds and insulin if needed. Seven insulin rules are highlighted: 1) Peaks = Plates (give food during insulin peaks to prevent low sugar). 2) Treat low sugar (awake: eat sugary food; asleep: dextrose IV). 3) Long-acting insulins (detemir, glargine) have no peaks and should not be mixed. 4) Regular insulin is the only one given IV. 5) Draw up clear before cloudy (regular then NPH). 6) Rotate injection sites every 2-3 weeks, preferably abdomen, no aspiration or massage. 7) Take insulin on sick days, even without food, but monitor glucose closely; increase dose with stress (sepsis, surgery, sickness, steroids).
The video details different insulin types and their critical peak times: Long-acting (detemir, glargine) have no peak and minimal hypoglycemia risk. NPH (intermediate) peaks at 4-12 hours (most dangerous 5-6 hours). Regular (short-acting) peaks at 2-4 hours. Rapid-acting (lispro, aspart, glulisine) have a 15-minute onset and 30-90 minute peak, requiring food immediately.
Insulin pumps provide a continuous, steady (basal) rate of insulin, reducing blood sugar swings, especially beneficial for Type 1. Patients must monitor blood sugar four times daily and use a bolus button for meals. For oral agents (only for Type 2), they improve insulin sensitivity after diet and exercise fail. Avoid alcohol and liver disease. Common oral meds include: Metformin (minimal hypoglycemia, toxic to liver/kidney, hold 48 hrs before cath lab), Sulfonylureas (glyphoside, glyburide - stimulate insulin, bad for heart, cause weight gain/sunburn), Pioglitazone (toxic to heart/liver, causes fluid retention), and Alpha-glucosidase inhibitors (acarbose, miglitol - carb blockers, cause GI issues).
Diet focuses on low calorie, low simple sugars, and high-fiber complex carbs (brown/whole foods, whole grains). Avoid bad carbs like white bread, sodas, and fruit juices (low fiber). For low sugar crises, these bad carbs are acceptable. If morning blood sugar is low, eat a bedtime snack. Emphasize supportive therapeutic communication. For diabetic feet: maintain clean, dry, and injury-free feet. Avoid flip-flops, high heels, nylon; prefer closed-toe, comfortable leather shoes with cotton socks. Never use OTC corn removers or overly hot baths (use a thermometer). Inspect feet daily for injuries, report immediately to HCP. Cut toenails straight across and file edges; never cut at angles. Dry thoroughly between toes after showering. Avoid callus removal, heavy powder, or vigorous rubbing.