Prospective study on antimicrobial prophylaxis in total hip arthroplasty

Area of Science:

• Orthopedic Surgery
• Infectious Disease Prevention
• Pharmacology

Background:

• Surgical site infections (SSI) are a significant complication in total hip arthroplasty (THA).
• Prophylactic antibiotics are standard to prevent SSIs, but optimal dosing strategies are debated.
• Increasing antibiotic blood concentration before surgery may enhance efficacy.

Purpose of the Study:

• To investigate if increasing the preoperative antibiotic dose reduces SSI incidence in THA patients.
• To compare SSI rates and depth between standard and increased antibiotic dosing regimens.

Main Methods:

• A prospective study involving 357 patients undergoing primary THA.
• Comparison of two groups: 1.5g Unasyn-S initial dose (n=172) versus an increased 3.0g initial dose (n=185).
• Analysis focused on SSI incidence and whether infections were superficial or deep.

Main Results:

• Overall SSI incidence was 1.96% (7/357 patients).
• The 1.5g group had 2.91% SSI (5/172), while the 3.0g group had 1.08% SSI (2/185).
• Deep infections occurred in 2 patients in the 1.5g group, none in the 3.0g group.

Conclusions:

• While not statistically significant, the higher preoperative antibiotic dose (3.0g) showed a trend toward lower SSI incidence.
• The increased dose may be an effective strategy for preventing SSIs in THA.
• Further research may clarify the optimal prophylactic antibiotic regimen for THA.