Bacterial growth on drain tips after total hip replacement. A controlled culture method

Area of Science:

• Orthopedic Surgery
• Infectious Disease
• Microbiology

Background:

• Suction drains are commonly used after total hip replacement (THR) to manage fluid accumulation.
• Understanding bacterial colonization of these drains is crucial for preventing surgical site infections (SSIs).

Purpose of the Study:

• To investigate the incidence and types of bacterial growth associated with suction drains following total hip replacement.
• To evaluate the relationship between drain site cultures and clinical outcomes.

Main Methods:

• Prospective study of 105 consecutive patients undergoing total hip replacement.
• Specimens collected from suction drain tips, internal tubing, and incision sites for bacterial culture.
• Patients operated within a sterile enclosure with body exhaust and antimicrobial prophylaxis.

Main Results:

• Positive bacterial cultures were observed in 37 patients.
• Coagulase-negative staphylococci were the most frequently isolated species (15 patients).
• Bacterial growth was most common in drain tips (8 patients) and drain tracks (16 patients).
• No deep infections were recorded within 12 months post-surgery.
• Four patients experienced wound hematoma and serous discharge.

Conclusions:

• Coagulase-negative staphylococci are the predominant bacteria colonizing suction drains after total hip replacement.
• The findings support considering routine antimicrobial prophylaxis targeting coagulase-negative staphylococci.