A 52-year-old man undergoes elective abdominal wall reconstruction for a large ventral hernia. His past medical history includes poorly controlled diabetes (HbA1c 9.2%), chronic corticosteroid use for COPD, and malnutrition (albumin 2.8 g/dL). Regarding factors that impair wound healing in this patient, all of the following are true EXCEPT:

Explanation

## Factors Impairing Wound Healing — Clinical Analysis ### Metabolic and Nutritional Factors **Key Point:** Diabetes, malnutrition, and corticosteroid use are major modifiable risk factors for impaired healing. #### Hyperglycemia (HbA1c 9.2%) - Impairs neutrophil chemotaxis and phagocytosis → delayed inflammatory phase - Inhibits collagen cross-linking and maturation → weak scar tissue - Increases infection risk - Delays epithelialization #### Hypoalbuminemia (2.8 g/dL; normal 3.5–5.0 g/dL) - Albumin is a major carrier protein for amino acids (building blocks of collagen and immune proteins) - Low albumin correlates with protein malnutrition - Impairs synthesis of acute-phase proteins and antibodies - Reduces oncotic pressure → tissue edema → impaired oxygen diffusion #### Corticosteroid Use (Chronic) - Suppresses fibroblast proliferation and collagen synthesis - Reduces VEGF expression → impaired angiogenesis - Decreases inflammatory response (both beneficial and harmful) - Increases infection risk - Delays epithelialization ### Age and Wound Healing **High-Yield:** While age >50 does slow wound healing, it is NOT the single most significant factor in this patient. - Age-related changes: slower collagen synthesis, reduced growth factor response, delayed epithelialization - However, in this case, **diabetes, malnutrition, and corticosteroid use are FAR MORE IMPACTFUL** than age alone - A 52-year-old with optimal metabolic control and nutrition heals well - This patient's HbA1c 9.2%, albumin 2.8, and chronic steroids are the **dominant barriers** **Clinical Pearl:** The "age effect" is often overstated in isolation. Modifiable factors (glycemic control, nutrition, infection prevention) have much greater impact on wound healing outcomes than chronologic age. ### Ranking of Risk Factors in This Patient | Factor | Impact Level | Modifiability | |--------|--------------|----------------| | Hyperglycemia (HbA1c 9.2%) | **Very High** | Modifiable (insulin, oral agents) | | Hypoalbuminemia (2.8 g/dL) | **Very High** | Modifiable (nutritional support, protein) | | Chronic corticosteroid use | **High** | Partially modifiable (taper if possible) | | Age 52 years | **Low–Moderate** | Non-modifiable | **Mnemonic:** **DISC** — **D**iabetes, **I**mmune suppression (steroids), **S**tarvation (malnutrition), **C**hronic disease — are the BIG modifiable impairments; age is secondary. **Warning:** Do not assume age is the "most significant" factor without considering the patient's metabolic and nutritional status. In this case, the metabolic derangements dwarf the age effect.