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[Bone penetration of cefazoline (author's transl)]
Pathologie-Biologie
|January 1, 1982
Summary
Cefazoline antibiotic levels in femoral heads after hip replacement surgery remain effective for twelve hours. This concentration is higher than needed to combat common post-surgery infections like Staphylococcus aureus.
Area of Science:
- Pharmacology
- Orthopedic Surgery
- Infectious Disease
Background:
- Surgical site infections are a risk in orthopedic procedures.
- Antibiotic prophylaxis is crucial for preventing infections.
- Understanding antibiotic distribution in bone tissue is vital.
Purpose of the Study:
- To determine the concentration and elimination of cefazoline in femoral head tissue.
- To assess if cefazoline levels in bone exceed the minimum inhibitory concentration (MIC) for Staphylococcus aureus.
Main Methods:
- Fifty-eight patients undergoing total hip replacement received a single 1-gram intramuscular dose of cefazoline.
- Antibiotic levels were measured in femoral head tissue and blood over time.
Main Results:
- Femoral head cefazoline elimination paralleled blood elimination but was approximately ten times lower.
- Detectable levels of 0.5 microgram/g were found in the capsule and femoral head twelve hours post-injection.
- These levels were higher than the MIC for Staphylococcus aureus.
Conclusions:
- A single intramuscular dose of cefazoline provides sustained therapeutic concentrations in the femoral head.
- Cefazoline is effective in preventing Staphylococcus aureus infections following total hip replacement.
- The drug's distribution in bone supports its use as an antibiotic prophylaxis in this surgical context.