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How time affects the risk of rupture in appendicitis
Nina A Bickell1, Arthur H Aufses, Mary Rojas
1Department of Health Policy, Mount Sinai School of Medicine, New York, NY 10029, USA.
Journal of the American College of Surgeons
|February 28, 2006
Summary
The risk of appendicitis rupture increases significantly after 36 hours from symptom onset, reaching 5% and remaining steady. Prompt surgical intervention is crucial to mitigate rupture risk in appendicitis patients.
Area of Science:
- Medical research
- Surgical outcomes
- Public health
Background:
- Delay in appendicitis treatment is a potential risk factor for rupture.
- Limited data exists on how rupture risk evolves over time post-symptom onset.
Purpose of the Study:
- To quantify the changing risk of appendiceal rupture with increasing time from symptom onset to treatment.
- To inform the urgency of surgical intervention for appendicitis.
Main Methods:
- Retrospective chart review of 219 appendicitis patients.
- Life table methods to calculate conditional rupture risks.
- Logistic and linear regression to identify associated factors.
Main Results:
- Rupture risk <2% within 36 hours; rises to 5% and plateaus thereafter in 12-hour intervals.
- Increased rupture risk observed with longer untreated symptom duration (RR=6.6), older age (RR=4.2), fever (RR=3.6), and tachycardia (RR=3.4).
- Emergency department presentation and confirmed appendicitis diagnosis shortened treatment time; CT scans prolonged it.
Conclusions:
- Appendicitis rupture risk escalates to 5% after 36 hours of untreated symptoms.
- Physicians should avoid delaying appendicitis surgery beyond 36 hours from symptom onset.
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