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Related Concept Videos

Appendicitis-II: Diagnostic Studies and Management01:29

Appendicitis-II: Diagnostic Studies and Management

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Diagnosing and managing appendicitis requires a structured and comprehensive approach that spans from initial assessment to postoperative care. Here is an overview of the process:
Diagnosing Appendicitis
It requires a multifaceted approach, starting with a detailed physical examination to pinpoint the location and nature of the pain and identify any associated symptoms. Laboratory tests play a crucial role. A complete Blood Count (CBC) typically reveals leukocytosis (an increased number of...
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Appendicitis-I: Introduction01:22

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The appendix, a small, narrow, blind tube extending from the inferior part of the cecum, is widely regarded as a vestigial organ, having lost much of its original function through evolution. Despite its diminished role, the appendix can become inflamed, a condition known as appendicitis.
Etiology: Appendicitis can arise from various causes, primarily rooted in the obstruction of the appendix lumen. Factors contributing to this obstruction include fecal accumulation, lymphoid hyperplasia and, in...
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Interval Appendectomy: Finding the Breaking Point for Cost-Effectiveness.

Lara Senekjian1, Raminder Nirula1, Brandon Bellows2

  • 1Department of Surgery, University of Utah School of Medicine, Salt Lake City, UT.

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|August 10, 2016
PubMed
Summary
This summary is machine-generated.

Interval appendectomy (IA) is cost-effective for patients under 34 years old. This analysis compares IA versus no interval appendectomy (NIA) to determine optimal patient age for this surgical consideration.

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Area of Science:

  • Surgical Outcomes
  • Health Economics
  • Gastroenterology

Background:

  • Phlegmonous appendicitis can be managed nonoperatively.
  • The necessity of interval appendectomy (IA) after nonoperative management is debated due to low recurrence and neoplasm risks.

Purpose of the Study:

  • To determine the cost-effectiveness of interval appendectomy (IA) based on patient age.
  • To identify the age threshold beyond which IA is no longer cost-effective.

Main Methods:

  • A cost-effectiveness model was developed using TreeAge software, comparing IA and no interval appendectomy (NIA) strategies.
  • Monte Carlo microsimulation and probabilistic sensitivity analysis were employed to model outcomes, complications, and costs (Centers for Medicare and Medicaid Services) over a lifetime.
  • Quality-adjusted life years (QALYs) were used as the utility measure, with data extracted from published sources.

Main Results:

  • For an 18-year-old, IA yielded more QALYs than NIA, despite higher initial costs.
  • For a 35-year-old, NIA was more cost-effective, with a cost-effectiveness ratio of $237,455/QALY for IA compared to NIA.
  • Interval appendectomy remained cost-effective up to age 33 at a willingness-to-pay threshold of $50,000/QALY.

Conclusions:

  • Interval appendectomy is a cost-effective strategy for patients younger than 34 years.
  • Age is a critical factor in the cost-effectiveness analysis of interval appendectomy after phlegmonous appendicitis.