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2013 ; 1
(4
): 158-63
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Accuracy of Ultrasonography in Diagnosing Acute Appendicitis
#MMPMID27162849
Javidi Parsijani P
; Pourhabibi Zarandi N
; Paydar S
; Abbasi HR
; Bolandparvaz S
Bull Emerg Trauma
2013[Oct]; 1
(4
): 158-63
PMID27162849
show ga
OBJECTIVES: To evaluate the accuracy of sonography in diagnosing acute
appendicitis in patients with Alvarado score 4-7. METHODS: This is a
retrospective cross-sectional study being performed in Namazee hospital
affiliated with Shiraz University of Medical sciences during a one year period
from 9/2007 to 9/2008. We evaluated all patients with Alvarado score 4-7 and
divided them in two groups: those with Ultrasound study prior to surgery and
those without any imaging modalities for diagnosis of AA. The demographic
information, histopathology, physical examination, laboratory data, sonography
report and histopathological reports of patients were gathered. RESULTS: A total
of 238 patients had Alvarado scores 4-7 including 160 males and 78 females. 110
patients did not have any imaging and 128 had undergone sonography before
operation. Ultrasound had overall sensitivity of 75 %, specificity 69.2 %, PPV 88
%, NPV 46.1% and accuracy of 73.6 %. Negative appendectomy rate was 20.9 % and
23.4 % in those without sonography and inpatients with sonography respectively,
with a higher rate in females. CONCLUSION: Ultrasound is more useful when the
patient is female and the result of sonography is positive; however, it is not
reliable when the result is negative and maybe other diagnostic modalities such
as CT scan can help us in better diagnosis of Acute Appendicitis.