Management of Diabetic Patients

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Preoperative Evaluation - Sweet Start Strategy

  • Goal: Perioperative BG 80-180 mg/dL; prevent DKA/HHS.
  • Assessment:
    • History: DM type, duration, meds (OHAs, insulin), control (HbA1c, BG logs), complications (CAD, nephro-, neuro- [autonomic/gastroparesis], retino-), hypoglycemia awareness.
    • Exam: Airway (limited joint mobility), CVS, Neuro.
  • Investigations:
    • BG (F/R), HbA1c (target <7%; <8.5% may be acceptable for minor surgery if stable).
    • ECG (if indicated), KFT, Urinalysis (ketones).
  • Key Pre-op Med Adjustments:
    • Metformin, Sulfonylureas: Hold day of surgery.
    • SGLT2-i: Hold 3 days prior (risk euglycemic DKA). 📌 SGLT2 = Stop 3 days.
    • Basal insulin: Continue (may ↓ dose 20-30%). Prandial: Hold if NPO.

⭐ Elective surgery: Postpone if HbA1c >8.5% or persistent BG >180-200 mg/dL for optimization.

Intraoperative Management - Steady Sugar Show

  • Goal: Glycemic stability. Prevent hypo (<70 mg/dL) & severe hyper (>180-200 mg/dL).
  • Target Blood Glucose: Aim for 140-180 mg/dL.
  • Monitoring:
    • Point-of-Care Testing (POCT) essential.
    • Frequency: q1-2h; more if BG labile/insulin titration.
  • Insulin Management:
    • VRIII (Variable Rate Intravenous Insulin Infusion): For T1DM, insulin-requiring T2DM, major/long surgery.
    • Use regular human insulin.
    • Initial rate: 0.5-2 units/hour, adjust based on BG.
    • 📌 "1 Unit Rule" (approx): 1 unit insulin lowers BG by ~25-50 mg/dL (variable).
  • Glucose Support:
    • IV Glucose: D5W often at 50-100 mL/hr (provides 2.5-5g glucose/hr) if NPO & on insulin, to meet part of basal needs.
  • Anesthetic Considerations:
    • Minimize stress. Regional anesthesia may offer better glycemic control vs GA.

⭐ For patients on VRIII, a simultaneous glucose infusion (e.g., 5% Dextrose) is crucial to prevent hypoglycemia and provide basal carbohydrate needs, typically aiming for 5-10 grams of glucose per hour.

Postoperative Care - Safe Recovery Route

  • PACU Monitoring:
    • Frequent blood glucose (BG) checks (q1-2h); target <180-200 mg/dL.
    • Vitals, pain, Postoperative Nausea and Vomiting (PONV), hydration status.
    • Treat hypoglycemia (BG <70 mg/dL) promptly with oral glucose/IV dextrose.
  • Discharge Readiness (e.g., PADS Score ≥9):
    • Stable vital signs, alert & oriented.
    • Pain & PONV controlled.
    • Tolerating oral fluids & diet as advised.
    • Ambulating safely (age-appropriate).
    • Voided (if applicable, e.g., post-spinal).
  • Diabetic-Specific Discharge Planning:
    • Clear instructions: BG monitoring, medication resumption/adjustment (especially insulin, Oral Hypoglycemic Agents - OHAs).
    • Hypoglycemia management: Recognition, home treatment (e.g., 15g fast-acting carbohydrates).
    • Reinforce sick day rules.
    • Provide contact information for concerns. ⭐ > Postoperative hyperglycemia (BG >180 mg/dL) is linked to an increased risk of surgical site infection (SSI), even in day-care surgery.
  • Escort & Follow-up:
    • Mandatory responsible adult escort for discharge.
    • Scheduled follow-up with surgeon and/or primary care physician for diabetes management continuity.

High‑Yield Points - ⚡ Biggest Takeaways

  • Ideal preoperative HbA1c is < 8% for elective procedures.
  • Morning of surgery: Omit oral hypoglycemics; administer half-dose of intermediate/long-acting insulin.
  • Maintain intraoperative glucose between 140-180 mg/dL.
  • Hypoglycemia (< 70 mg/dL) is a critical perioperative risk; manage urgently.
  • DKA and HHS are absolute contraindications for elective ambulatory surgery.
  • Stop Metformin 24-48 hours preoperatively, especially with renal issues or contrast use.
  • Schedule diabetic patients for early morning surgery slots to minimize fasting duration and disruption of glucose control routines.

Practice Questions: Management of Diabetic Patients

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What should be the minimum value of HbA1c to safely carry out a surgical procedure in an emergency setting?

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Flashcards: Management of Diabetic Patients

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The intravenous induction agent of choice for ambulatory anesthesia is _____

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The intravenous induction agent of choice for ambulatory anesthesia is _____

propofol

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