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Pediatric Radiology

, Volume 45, Issue 5, pp 678–685 | Cite as

Implementing an ultrasound-based protocol for diagnosingappendicitis while maintaining diagnostic accuracy

  • Angela J. van Atta
  • Henry J. Baskin
  • Connie K. Maves
  • Michael D. Rollins
  • Robert G. Bolte
  • Michael B. Mundorff
  • Seth P. Andrews
  • David M. DansieEmail author
Original Article

Abstract

Background

The use of ultrasound to diagnose appendicitis in children is well-documented but not universally employed outside of pediatric academic centers, especially in the United States. Various obstacles make it difficult for institutions and radiologists to abandon a successful and accurate CT-based imaging protocol in favor of a US-based protocol.

Objective

To describe how we overcame barriers to implementing a US-based appendicitis protocol among a large group of nonacademic private-practice pediatric radiologists while maintaining diagnostic accuracy and decreasing medical costs.

Materials and methods

A multidisciplinary team of physicians (pediatric surgery, pediatric emergency medicine and pediatric radiology) approved an imaging protocol using US as the primary modality to evaluate suspected appendicitis with CT for equivocal cases. The protocol addressed potential bias against US and accommodated for institutional limitations of radiologist and sonographer experience and availability. Radiologists coded US reports according to the probability of appendicitis. Radiology reports were compared with clinical outcomes to assess diagnostic accuracy. During the study period, physicians from each group were apprised of the interim US protocol accuracy results. Problematic cases were discussed openly.

Results

A total of 512 children were enrolled and underwent US for evaluation of appendicitis over a 30-month period. Diagnostic accuracy was comparable to published results for combined US/CT protocols. Comparing the first 12 months to the last 12 months of the study period, the proportion of children achieving an unequivocal US result increased from 30% (51/169) to 53% (149/282) and the proportion of children undergoing surgery based solely on US findings increased from 55% (23/42) to 84% (92/109). Overall, 63% (325/512) of patients in the protocol did not require a CT. Total patient costs were reduced by $30,182 annually.

Conclusion

We overcame several barriers to implementing a US protocol. During the study period our ability to visualize the appendix with US increased and utilization of CT decreased. Our overall diagnostic accuracy with the US-based protocol was comparable to other published results and remained unchanged throughout the study.

Keywords

Ultrasound Computed tomography Appendicitis Interdisciplinary cooperation Cost analysis Children 

Notes

Acknowledgments

We express our thanks to the pediatric sonographers whose expertise and dedication to pediatric imaging made this manuscript possible: Sandi Arnberg, RDMS; Carly Durrant, RDMS; Sasha Gordon, RDMS, RVT; Kandus Johnson, RDMS; Marie Newton, RDMS, RVT; Kim Nowicki, RDMS, RVT; Jeremy Olson, RDMS, RVT; Brad Watts, RDMS.

Conflicts of interest

None

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Angela J. van Atta
    • 1
  • Henry J. Baskin
    • 2
  • Connie K. Maves
    • 2
  • Michael D. Rollins
    • 3
  • Robert G. Bolte
    • 4
  • Michael B. Mundorff
    • 5
  • Seth P. Andrews
    • 5
  • David M. Dansie
    • 2
    Email author
  1. 1.University of Utah School of MedicineSalt Lake CityUSA
  2. 2.Department of RadiologyPrimary Children’s HospitalSalt Lake CityUSA
  3. 3.Department of Surgery, Division of Pediatric SurgeryUniversity of Utah School of MedicineSalt Lake CityUSA
  4. 4.Department of Pediatrics, Division of Pediatric Emergency MedicineUniversity of Utah School of MedicineSalt Lake CityUSA
  5. 5.Systems ImprovementPrimary Children’s HospitalSalt Lake CityUSA

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