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Prevention of post-operative infection in appendicectomy by single dose intravenous metronidazole. An open
Abstract:
In an open prospective randomized study of appendicectomy, single-dose (1 g) intravenous metronidazole prophylaxis (and continued metronidazole plus nalidixic acid in perforated appendices) resulted in a lower overall post-operative infection rate (1.4%) than no prophylaxis and doxycycline therapy in the case of perforation (16%, p less than 0.025). In patients with an unperforated appendix no infections occurred after single-dose metronidazole prophylaxis as opposed to 8.2% infections in untreated controls (p less than 0.025).
Insights
Single-dose intravenous metronidazole effectively reduced post-operative infection rates in appendicectomy patients. This antibiotic prophylaxis proved significantly more effective than no treatment or doxycycline for perforated appendices.
Area of Science:
- Surgical Infection Prevention
- Clinical Microbiology
- Evidence-Based Medicine
Background:
- Appendicectomy is a common surgical procedure with a risk of post-operative infections.
- Current prophylactic strategies vary, especially for perforated appendicitis.
- Optimizing antibiotic prophylaxis can improve patient outcomes and reduce healthcare costs.
Purpose of the Study:
- To evaluate the efficacy of single-dose intravenous metronidazole as prophylaxis for appendicectomy.
- To compare metronidazole prophylaxis with no prophylaxis and doxycycline therapy in specific appendicitis cases.
- To determine the impact of antibiotic prophylaxis on overall post-operative infection rates.
Main Methods:
- An open prospective randomized study design was employed.
- Participants undergoing appendicectomy were assigned to receive either metronidazole prophylaxis or no prophylaxis/doxycycline.
- Post-operative infection rates were meticulously monitored and compared between groups.
Main Results:
- Single-dose intravenous metronidazole prophylaxis resulted in a significantly lower overall post-operative infection rate (1.4%) compared to no prophylaxis/doxycycline (16%, p < 0.025).
- In cases of unperforated appendix, single-dose metronidazole prophylaxis led to zero infections, versus 8.2% in untreated controls (p < 0.025).
- For perforated appendices, continued metronidazole plus nalidixic acid also demonstrated reduced infection rates.
Conclusions:
- Single-dose intravenous metronidazole is a highly effective prophylactic agent for appendicectomy.
- Metronidazole prophylaxis significantly reduces surgical site infections in appendicectomy patients, including those with perforated appendices.
- This study supports the routine use of metronidazole for appendicectomy prophylaxis to improve surgical outcomes.