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Difficulty: MediumInfection Control and Hospital-Acquired Conditions

A 68-year-old man is evaluated in the preoperative clinic prior to an elective open inguinal hernia repair scheduled for the following day. He has a history of type 2 diabetes mellitus and essential hypertension. His current medications include metformin and lisinopril. Vital signs today are temperature 37.0∘C37.0^\circ\text{C} (98.6∘F98.6^\circ\text{F}), blood pressure 132/82 mm Hg132/82\text{ mm Hg}, pulse 76/min, and respiratory rate 14/min. Physical examination is notable for a reducible right inguinal hernia. Recent laboratory studies show a hemoglobin A1c of 7.2%7.2\%. The surgical team reviews the hospital's infection control protocols to minimize the risk of a hospital-acquired surgical site infection (SSI). Which of the following interventions is most appropriate to include in this patient's perioperative management?

  1. Administering a single dose of prophylactic intravenous cefazolin within 60 minutes prior to the surgical incisionAnswer
  2. B
    Removing hair at the surgical site using a standard razor immediately before the procedure
  3. C
    Continuing prophylactic intravenous antibiotics for 72 hours postoperatively
  4. D
    Postponing the surgery until the patient's hemoglobin A1c is less than 6.0%
  5. E
    Obtaining routine preoperative skin swab cultures to screen for methicillin-resistant Staphylococcus aureus (MRSA) colonization

Answer

Administering a single dose of prophylactic intravenous cefazolin within 60 minutes prior to the surgical incision.
Surgical site infections (SSIs) are a significant source of hospital-acquired morbidity. A cornerstone of SSI prevention protocols is the administration of prophylactic intravenous antibiotics (commonly a first-generation cephalosporin such as cefazolin for clean procedures) within 60 minutes prior to the surgical incision. This specific timing ensures that bactericidal tissue and serum concentrations are optimal at the exact moment the skin barrier is breached, significantly reducing the risk of inoculation by skin flora.

Step-by-Step Solution

1
Analyze the clinical scenario and the patient's risk factors.
The patient is undergoing an elective, clean general surgery (inguinal hernia repair) and has well-controlled diabetes (A1c 7.2%).
Understanding the risk baseline determines which infection control protocols are appropriate.
2
Identify core components of standard Surgical Site Infection (SSI) prevention bundles.
Standard measures include appropriate hair removal (clippers, not razors), moderate glycemic control, normothermia, and timely antibiotic prophylaxis.
These evidence-based guidelines systematically reduce hospital-acquired SSIs.
3
Evaluate the timing and duration of prophylactic antibiotics.
Antibiotics must be administered within 60 minutes prior to incision to ensure bactericidal tissue levels are present when the skin is breached, and stopped within 24 hours.
Incorrect timing or prolonged duration negates the protective effect and drives resistance.
4
Select the option that correctly applies an SSI prevention protocol.
Administering cefazolin within 60 minutes prior to incision is the most appropriate intervention.
This directly aligns with CDC and surgical society guidelines for SSI prevention.

Key Concept

Surgical Site Infection (SSI) prevention requires timely administration of prophylactic antibiotics (within 60 minutes prior to incision), appropriate hair removal using clippers rather than razors, and maintaining moderate perioperative glycemic control.
Estimated Time:1m 15s
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Topics

Infection Control and Hospital-Acquired Conditions

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