Diabetes Mellitus

# Diabetes Mellitus — Stylish Markdown Guide ✨ > **Quick note:** you wrote *“diabetyes malightus”* — I treated that as **Diabetes Mellitus** and made a single-file, stylish **Markdown** reference you can copy, paste, or save. — Clean, visual, and practical. --- # 🎯 Overview **Diabetes mellitus** is a group of metabolic diseases characterized by **hyperglycaemia** (high blood glucose) resulting from defects in **insulin secretion**, **insulin action**, or both. --- # 🧭 Types (short) * **Type 1 Diabetes (T1DM)** — autoimmune β-cell loss → absolute insulin deficiency. * **Type 2 Diabetes (T2DM)** — insulin resistance + relative insulin deficiency (most common). * **Gestational Diabetes (GDM)** — glucose intolerance first recognized during pregnancy. * **Other / Secondary** — e.g., pancreatitis, drugs (steroids), endocrine disorders. --- # ⚙️ Pathophysiology (high level) * Insulin deficiency → decreased glucose uptake (muscle/fat), increased hepatic glucose output. * Chronic hyperglycaemia → microvascular & macrovascular damage via glycation, oxidative stress, inflammation. --- # 🩺 Clinical Features (common) * Polyuria (↑urination) * Polydipsia (↑thirst) * Polyphagia (↑hunger) or weight loss (esp. T1) * Fatigue, blurred vision, poor wound healing, recurrent infections --- # 📋 Diagnostic Criteria (quick) > Use local lab reference ranges — these are typical values used in many guidelines. * **Fasting plasma glucose (FPG):** * Normal: `< 100 mg/dL` * Impaired fasting: `100–125 mg/dL` * Diabetes: `≥ 126 mg/dL` (on ≥2 occasions) * **2-hour OGTT (75 g):** * Diabetes: `≥ 200 mg/dL` * **HbA1c:** * Normal: `< 5.7%` * Prediabetes: `5.7–6.4%` * Diabetes: `≥ 6.5%` * **Random plasma glucose ≥ 200 mg/dL** with typical symptoms = diagnostic. --- # 🧪 Investigations (baseline & monitoring) * Baseline: `FPG`, `HbA1c`, lipids, renal function (creatinine, eGFR), urine albumin-creatinine ratio (UACR), LFTs, TSH (if indicated). * Ongoing: `HbA1c` every `3 months` until stable, then `3–6 months`; yearly retina exam; microalbuminuria screen yearly. --- # 🛠️ Management — Principles 1. **Educate & empower** (self-monitoring, lifestyle). 2. **Lifestyle therapy** = cornerstone (diet, weight loss, exercise). 3. **Glycaemic targets** individualized (e.g., typical HbA1c target ~ `<7%` for many adults; adjust for age, comorbidity). 4. **Pharmacotherapy**: start with metformin (unless contraindicated) for T2DM; escalate/add agents based on comorbidities, cost, risk of hypoglycaemia, weight effects, kidney function. 5. **Insulin**: required for all T1DM and often for T2DM with severe hyperglycaemia, illness, pregnancy, or failure of oral agents. --- # 💊 Common Medication Classes (T2DM focus) * **Metformin** — first line (low hypoglycaemia risk, weight neutral/loss). * **SGLT2 inhibitors** — CV & renal benefit (also cause glucosuria). * **GLP-1 receptor agonists** — weight loss, CV benefits in selected patients. * **DPP-4 inhibitors** — modest HbA1c lowering, well tolerated. * **Sulfonylureas / Meglitinides** — insulin secretagogues (hypoglycaemia risk, weight gain). * **Insulin** — basal, bolus, or combination regimens for many indications. --- # 🚨 Emergencies ### Diabetic Ketoacidosis (DKA) — typical of T1DM * **Triad:** hyperglycaemia + metabolic acidosis + ketonaemia. * **Signs:** dehydration, Kussmaul respirations, abdominal pain, altered mental status. * **Management:** IV fluids, insulin infusion, potassium replacement, treat precipitant. ### Hyperosmolar Hyperglycaemic State (HHS) — typical of T2DM * **Profound hyperglycaemia**, high osmolality, minimal ketones. * **Management:** aggressive rehydration, insulin, correct electrolytes. --- # 🩺 Complication Screening & Prevention * **Microvascular:** retinopathy (retina exam yearly), nephropathy (UACR yearly), neuropathy (foot exam yearly). * **Macrovascular:** manage blood pressure, lipids, smoking cessation, antiplatelet therapy when indicated. * **Vaccinations:** influenza yearly, pneumococcal per guidelines, hepatitis B if indicated. --- # 🍽 Lifestyle — Practical Tips * **Diet:** carbohydrate awareness, portion control, Mediterranean or DASH-style patterns helpful. * **Exercise:** ≥`150 min/week` moderate aerobic + resistance training 2–3×/week. * **Weight:** modest loss (5–10%) improves glucose. * **Alcohol:** moderate; beware hypoglycaemia with insulin/sulfonylureas. * **Smoking:** strongly advise quitting. --- # 🧾 Patient-friendly SMBG (self-monitoring of blood glucose) * **When to check:** individualized — e.g., fasting, pre-meals, postprandial, bedtime, or with symptoms. * **Targets (examples):** premeal `80–130 mg/dL`, 1–2 hr postprandial `< 180 mg/dL` (individualize). --- # 🤝 Pregnancy & Diabetes * **Preconception counselling** for women with diabetes — aim for tight glycaemic control before conception. * **GDM**: screen at `24–28 weeks` (or earlier if high risk). Management often starts with medical nutrition therapy, then insulin if needed (metformin use varies by guideline). --- # 🧾 Quick Reference Cheat-Sheet (copyable) | Topic | Key point | | ---------------------------------- | -------------------------------------- | | HbA1c diagnostic cut-off | `≥ 6.5%` | | Fasting glucose diagnostic cut-off | `≥ 126 mg/dL` | | First-line drug (T2DM) | **Metformin** (unless contraindicated) | | Typical HbA1c target | `~ < 7%` (individualize) | | Urine screen | `UACR` yearly | | Emergencies | DKA (T1), HHS (T2) | --- # ✅ Clinical Checklist (useful for consultations) * [ ] Symptoms consistent with hyperglycaemia? * [ ] Obtain `FPG`, `HbA1c` (confirm abnormal results). * [ ] Baseline labs: renal, lipids, UACR. * [ ] Lifestyle discussion documented (diet/exercise). * [ ] Vaccination status checked. * [ ] Referral to diabetes educator/dietitian if available. --- # 🧠 Short patient explanation (one-liner) > *“Diabetes is when your body can’t keep your blood sugar in a safe range — we manage it by healthy habits, monitoring, and medicines when needed to prevent complications.”* --- # 📚 Further reading (suggested) > Search reputable sources like international diabetes associations, local clinical guidelines, and recent reviews for region-specific targets and drug availability. --- If you want, I can: * Convert this to a **PDF** or **print-ready** brochure. * Make a **cheat-sheet card** with only the absolute essentials. * Produce **slide-ready** markdown for patient education. 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