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Inicio Radiología (English Edition) Suspicion of acute appendicitis in adults. The value of ultrasound in our hospit...
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Vol. 61. Issue 1.
Pages 51-59 (January - February 2019)
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Vol. 61. Issue 1.
Pages 51-59 (January - February 2019)
Original Report
Suspicion of acute appendicitis in adults. The value of ultrasound in our hospital
Sospecha de apendicitis aguda en adultos. El valor de la ecografía en nuestro hospital
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212
G. Benedetto
Corresponding author
gbenedetto@hospital-ribera.com

Corresponding author.
, M.D. Ferrer Puchol, A. Llavata Solaz
Servicio de Radiodiagnóstico, Hospital Universitario de La Ribera, Alzira, Valencia, Spain
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Tables (4)
Table 1. Definition of presumptive diagnosis categories.
Table 2. Study variables, classified by groups.
Table 3. Results by diagnosis category (percentages in parentheses).
Table 4. Statistically significant variables (p<0.05) for the diagnosis of acute appendicitis.
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Abstract
Objective

To evaluate the accuracy of ultrasonography for the diagnosis of acute appendicitis in adults, to calculate the negative appendicectomy rate in operated patients and the accuracy of pre-defined diagnostic categories and to identify statistically significant signs and symptoms of acute appendicitis in ultrasonography.

Material and methods

Descriptive prospective study in which we collected the findings of the urgent ultrasonographies ordered in a one-year period for adult patients with pain in the right iliac fossa (RIF), along with their symptoms. We classified them in five different diagnostic categories presented in the radiological report: normal appendix, non-visible appendix and no secondary signs, non-conclusive, probable appendicitis, certain appendicitis. By mean of the Stata14 software descriptive analysis, T-test and Chi-square were performed and the data were compared with the final pathological report.

Results

Population: 139 patients (45% men, 55% women), mean age: 32.68 (15–84). Prevalence of acute appendicitis: 50.35% (70/139). Negative appendicectomy rate: 0%. Negative predictive value for the categories 1, 2 and 3 taken together: 9078%. Positive predictive value for the categories 4 and 5 taken together: 100%. Ultrasound sensibility and specificity 90% and 100%, respectively. Statistically significant signs and symptoms (p<0.05): RIF pain, fever, leukocytosis, left shift, visible appendix, non-compressibility, hyperechogenic fat, appendicolith and free fluid.

Conclusion

Ultrasound is very accurate for the diagnosis of acute appendicitis in adults.

Keywords:
Appendix
Appendicitis
Ultrasonography
Acute abdomen
Resumen
Objetivos

Evaluar la fiabilidad de la ecografía para el diagnóstico de la apendicitis aguda en los adultos, calcular la tasa de apendicectomías negativas en los pacientes intervenidos, calcular el valor predictivo de las categorías diagnósticas predefinidas e identificar los signos y síntomas significativos para apendicitis aguda.

Material y métodos

Estudio descriptivo prospectivo en que se recogieron los hallazgos de las ecografías urgentes solicitadas en un año para pacientes adultos con dolor en la fosa ilíaca derecha (FID), juntos con sus síntomas. Se clasificaron en 5 categorías diagnósticas reflejadas en el informe radiológico: apéndice normal, apéndice no visible y ausencia de signos secundarios, no concluyente, apendicitis probable, apendicitis segura. Con el programa Stata14 se realizaron el análisis descriptivo, el T-test y el Chi cuadrado y los datos se compararon con el diagnóstico anatomopatológico final posquirúrgico.

Resultados

Población: 139 pacientes (45% hombres, 55% mujeres), edad media: 32,68 (15-84). Prevalencia de apendicitis aguda: 50,35% (70/139). Tasa de apendicectomías negativas: 0%. Valor predictivo negativo de los grupos 1, 2 y 3 conjuntamente: 90,78%. Valor predictivo positivo de los grupos 4 y 5 conjuntamente: 100%. Sensibilidad y especificidad de la ecografía: 90% y 100% respectivamente. Signos y síntomas significativos para apendicitis aguda (p<0.05): dolor en la FID, fiebre, leucocitosis, desviación izquierda, apéndice visible, apéndice no compresible, grasa hiperecogénica, apendicolito, líquido libre.

Conclusiones

La ecografía es muy fiable para diagnosticar apendicitis aguda en los adultos.

Palabras clave:
Apéndice
Apendicitis
Ecografía
Abdomen agudo

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