Antibiotic received within 1 hour prior to surgery

What It Means
Percentage of selected surgery patients who receive an antibiotic within one hour prior to the time of surgical incision.

Why It Is Important
Studies have shown that the lowest incidence of post-operative infection is associated with antibiotic administration during the hour prior to surgery.

Numerator Definition
Number of surgical patients with prophylactic antibiotics started within one prior to surgical incision.

Denominator Definition
All surgical patients with no evidence of prior infection and a principle procedure code matching a list of selected ICD-9-CM surgical codes.

Denominator Excluded Populations

  • Patients less than 18 years of age
  • Patients who have a length of stay >120 days
  • Patients who had a hysterectomy and a caesarean section performed during this hospitalization
  • Patients who had a principle diagnosis suggestive of preoperative infectious diseases
  • Patients whose principle procedure was performed entirely by laparoscope
  • Patients enrolled in clinical trials
  • Patients whose principle procedure occurred prior to the date of admission
  • Patients with a documented infection prior to surgical procedure of interest
  • Patients who had a joint revision
  • Patients who had other procedures requiring general or spinal anesthesia that occurred within 3 days prior to or after surgery and during this hospital stay
  • Patients who were receiving antibiotics more than 24 hours prior to surgery
  • Patients who were receiving antibiotics within 24 hours prior to arrival

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