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Tables
- TABLE 1.
Summary of Preoperative HbA1c Guidance from Adjacent Surgical and Medical Specialties
Society/Guideline Specialty HbA1c Threshold Key Recommendation ADA Standards of Care 2024–2025 Endocrinology Surgery < 8.0% Target < 8% before elective procedures; individualize based on hypoglycemia risk CPOC Elective Surgery Guideline 2023 (UK) Perioperative Medicine < 8.5% (69 mmol/mol) Recommend referral to diabetes specialist team if HbA1c ≥ 8.5% (69 mmol/mol); timing of elective surgery adjusted accordingly to permit preoperative optimization ESC Non-Cardiac Surgery Guidelines 2022 Cardiovascular Surgery Screen; optimize preoperatively Class 1 (Level B): HbA1c test recommended for all patients with diabetes or disturbed glucose metabolism before NCS; elective surgery postponed if HbA1c ≥ 69 mmol/mol (8.5%), if safe and practical SAMBA Consensus Statement 2024 (Rajan et al., Anesth Analg.) Anesthesiology No HbA1c-based deferral threshold; day-of-surgery glucose is the operative metric No postponement based on HbA1c alone; day-of-surgery point-of-care glucose measurement required; proceed if DKA/HHNS absent; intraoperative glucose target 180–250 mg/dL ASPS Member Practice Guidelines Plastic/Cosmetic Surgery ≤ 7.0–7.5% preferred Many ASPS members prefer HbA1c ≤ 7.0%–7.5% for elective cosmetic procedures; multidisciplinary coordination required Mohs/Dermatologic Surgery literature Dermatologic Surgery < 7.5–8.0% for elective procedures Preoperative HbA1c recommended in all diabetic patients; HbA1c ≥ 7.8% associated with elevated wound complication risk in outpatient dermatologic procedures Wong et al 2022 (meta-analysis) General/Abdominal Surgery Risk increases > 6%–7% HbA1c > 7% associated with wound infection OR 1.21, indicating a 21% increase in odds of wound infection (95% Cl 1.08–1.36); risk begins to rise above 6%–7% baseline Wound Healing Society Guidelines 2023 Wound Care < 7.0% for optimal healing Optimizing glucose control improves wound healing outcomes in diabetic patients; chronic hyperglycemia is a central modifiable driver of impaired wound repair ADA = American Diabetes Association; CPOC = Centre for Perioperative Care (UK); ESC = European Society of Cardiology; SAMBA = Society for Ambulatory Anesthesia; ASPS = American Society of Plastic Surgeons; WHS = Wound Healing Society
HbA1c Range Risk Category Recommendation Conditions and Caveats < 7.0% Low risk Proceed Standard preoperative screening; routine counseling; no additional glycemic optimization required 7.0%–7.9% Moderate risk Proceed with optimization Coordinate with primary care or endocrinology; optimize glycemic control where feasible; day-of-surgery glucose check recommended (target < 180mg/dL); counsel patient explicitly on elevated risk of infection and delayed graft healing 8.0%–8.4% Elevated risk Proceed with caution; shared decision-making required Documented shared decision-making discussion mandatory, endocrinology clearance advised; consider limiting graft count in initial session; enhanced postoperative surveillance; defer if optimization is achievable without significant delay 8.5%–9.4% High risk Defer; optimize first Aligned with CPOC 2023 deferral threshold; refer to endocrinology or PCP for glycemic optimization before scheduling; reassess at 3 months; document clinical rationale if proceeding despite this level ≥ 9.5% Very high risk/relative contraindication Do not proceed electively Potentially significant risk of graft failure, infection, and impaired scalp healing; urgent endocrinology referral; reconsider candidacy only after sustained HbA1c improvement below 8.5% on two consecutive measurements ≥ 3 months apart * Day-of-surgery capillary blood glucose should be measured for all diabetic patients, with a target < 180mg/dL (10mmol/L) before proceeding. Procedures should be scheduled early in the day to minimize fasting-related glycemic variability.
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