If a surgical patient was given cefazolin but surgery is delayed by 2 hours, what should be done next?

• A. Administer another dose of cefazolin
• B. Continue with surgery as planned
• C. Switch to a different antibiotic
• D. Delay the surgery further

Answer: (A)

In this scenario, the appropriate action is to administer another dose of cefazolin. Cefazolin is a first-generation cephalosporin antibiotic commonly used for prophylactic purposes in surgical settings to prevent postoperative infections.

Timing of antibiotic administration is critical for surgical prophylaxis to ensure adequate serum and tissue concentrations at the time of incision. Generally, antibiotics should be given within one hour prior to the start of surgery. When surgery is delayed, there is a risk that the initial dose of cefazolin may not provide sufficient coverage during the actual procedure, especially if the delay extends beyond the drug’s half-life.

Since surgery is delayed by 2 hours, administering another dose of cefazolin helps to re-establish therapeutic levels of the antibiotic to effectively protect against infection during the surgical intervention. This ensures that the patient receives maximum benefit from the prophylactic antibiotic during the period when the risk of infection is greatest—during and after the surgical procedure.

Continuing with surgery as planned might mean that the patient will not have sufficient antibiotic protection if the initial dose has worn off. Switching to a different antibiotic or delaying the surgery further is not necessary or preferable in this scenario, as cefazolin is generally effective for most surgical prophylaxis needs.