Whether Intravenous Contrast is Necessary for CT Diagnosis of Acute Appendicitis in Adult ED Patients?

Yu Hui Chiu, Jen Dar Chen, Shih Hao Wang, Chui Mei Tiu, Chorng Kuang How, Jiun I. Lai, Yi Hong Chou, Carlos Lam, Ray Jade Chen

研究成果: 雜誌貢獻文章

10 引文 (Scopus)

摘要

Rationale and Objectives: To assess the necessity of intravenous contrast medium for abdominopelvic computed tomography (CT) diagnosis of acute appendicitis (APP) among adult patients with right lower quadrant (RLQ) abdominal pain at emergency department (ED). Materials and Methods: ED patients with clinical suspicion of APP from RLQ pain for a period of 8 months were enrolled retrospectively. Both pre- and postintravenous contrast-enhanced CT scans were performed for these patients. The visibility of vermiform appendix and specific CT findings of APP were recorded separately for noncontrast CT (NCT) and contrast-enhanced CT (CCT) images without knowledge of the patient's identity and final diagnosis. The sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy of CT diagnosis for APP were compared between the two groups. The ease of identifying appendix was also compared. Results: Forty-two (42.0%) of the 100 patients (55 males, 45 females; age range, 16-90 years; mean age, 49.3 years) were APP. There was no significant difference for the visibility of appendix (94% vs. 91%; P = .589) and radiological characters between the CCT and NCT groups. There were significant differences between the two groups for sensitivity (100% vs. 90.5%; P = .036), specificity (94.8% vs. 100%; P = .038), PPV (93.3% vs. 100%; P = .021), NPV (100% vs. 93.5%; P = .021), but no significant difference for accuracy (97% vs. 96%; P = 1). The appendix was easier to detect on CCT than NCT images (P = .013). Conclusion: The diagnostic sensitivity of CCT was significantly better than that of NCT. Intravenous contrast administration could also make doctors easier in indentifying appendixes.

原文英語
頁(從 - 到)73-78
頁數6
期刊Academic Radiology
20
發行號1
DOIs
出版狀態已發佈 - 一月 2013

指紋

Appendix
Appendicitis
Hospital Emergency Service
Tomography
Contrast Sensitivity
Patient Rights
Intravenous Administration
Abdominal Pain
Contrast Media
Sensitivity and Specificity
Pain

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

引用此文

Whether Intravenous Contrast is Necessary for CT Diagnosis of Acute Appendicitis in Adult ED Patients? / Chiu, Yu Hui; Chen, Jen Dar; Wang, Shih Hao; Tiu, Chui Mei; How, Chorng Kuang; Lai, Jiun I.; Chou, Yi Hong; Lam, Carlos; Chen, Ray Jade.

於: Academic Radiology, 卷 20, 編號 1, 01.2013, p. 73-78.

研究成果: 雜誌貢獻文章

Chiu, Yu Hui ; Chen, Jen Dar ; Wang, Shih Hao ; Tiu, Chui Mei ; How, Chorng Kuang ; Lai, Jiun I. ; Chou, Yi Hong ; Lam, Carlos ; Chen, Ray Jade. / Whether Intravenous Contrast is Necessary for CT Diagnosis of Acute Appendicitis in Adult ED Patients?. 於: Academic Radiology. 2013 ; 卷 20, 編號 1. 頁 73-78.
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abstract = "Rationale and Objectives: To assess the necessity of intravenous contrast medium for abdominopelvic computed tomography (CT) diagnosis of acute appendicitis (APP) among adult patients with right lower quadrant (RLQ) abdominal pain at emergency department (ED). Materials and Methods: ED patients with clinical suspicion of APP from RLQ pain for a period of 8 months were enrolled retrospectively. Both pre- and postintravenous contrast-enhanced CT scans were performed for these patients. The visibility of vermiform appendix and specific CT findings of APP were recorded separately for noncontrast CT (NCT) and contrast-enhanced CT (CCT) images without knowledge of the patient's identity and final diagnosis. The sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy of CT diagnosis for APP were compared between the two groups. The ease of identifying appendix was also compared. Results: Forty-two (42.0{\%}) of the 100 patients (55 males, 45 females; age range, 16-90 years; mean age, 49.3 years) were APP. There was no significant difference for the visibility of appendix (94{\%} vs. 91{\%}; P = .589) and radiological characters between the CCT and NCT groups. There were significant differences between the two groups for sensitivity (100{\%} vs. 90.5{\%}; P = .036), specificity (94.8{\%} vs. 100{\%}; P = .038), PPV (93.3{\%} vs. 100{\%}; P = .021), NPV (100{\%} vs. 93.5{\%}; P = .021), but no significant difference for accuracy (97{\%} vs. 96{\%}; P = 1). The appendix was easier to detect on CCT than NCT images (P = .013). Conclusion: The diagnostic sensitivity of CCT was significantly better than that of NCT. Intravenous contrast administration could also make doctors easier in indentifying appendixes.",
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AU - Chiu, Yu Hui

AU - Chen, Jen Dar

AU - Wang, Shih Hao

AU - Tiu, Chui Mei

AU - How, Chorng Kuang

AU - Lai, Jiun I.

AU - Chou, Yi Hong

AU - Lam, Carlos

AU - Chen, Ray Jade

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N2 - Rationale and Objectives: To assess the necessity of intravenous contrast medium for abdominopelvic computed tomography (CT) diagnosis of acute appendicitis (APP) among adult patients with right lower quadrant (RLQ) abdominal pain at emergency department (ED). Materials and Methods: ED patients with clinical suspicion of APP from RLQ pain for a period of 8 months were enrolled retrospectively. Both pre- and postintravenous contrast-enhanced CT scans were performed for these patients. The visibility of vermiform appendix and specific CT findings of APP were recorded separately for noncontrast CT (NCT) and contrast-enhanced CT (CCT) images without knowledge of the patient's identity and final diagnosis. The sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy of CT diagnosis for APP were compared between the two groups. The ease of identifying appendix was also compared. Results: Forty-two (42.0%) of the 100 patients (55 males, 45 females; age range, 16-90 years; mean age, 49.3 years) were APP. There was no significant difference for the visibility of appendix (94% vs. 91%; P = .589) and radiological characters between the CCT and NCT groups. There were significant differences between the two groups for sensitivity (100% vs. 90.5%; P = .036), specificity (94.8% vs. 100%; P = .038), PPV (93.3% vs. 100%; P = .021), NPV (100% vs. 93.5%; P = .021), but no significant difference for accuracy (97% vs. 96%; P = 1). The appendix was easier to detect on CCT than NCT images (P = .013). Conclusion: The diagnostic sensitivity of CCT was significantly better than that of NCT. Intravenous contrast administration could also make doctors easier in indentifying appendixes.

AB - Rationale and Objectives: To assess the necessity of intravenous contrast medium for abdominopelvic computed tomography (CT) diagnosis of acute appendicitis (APP) among adult patients with right lower quadrant (RLQ) abdominal pain at emergency department (ED). Materials and Methods: ED patients with clinical suspicion of APP from RLQ pain for a period of 8 months were enrolled retrospectively. Both pre- and postintravenous contrast-enhanced CT scans were performed for these patients. The visibility of vermiform appendix and specific CT findings of APP were recorded separately for noncontrast CT (NCT) and contrast-enhanced CT (CCT) images without knowledge of the patient's identity and final diagnosis. The sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy of CT diagnosis for APP were compared between the two groups. The ease of identifying appendix was also compared. Results: Forty-two (42.0%) of the 100 patients (55 males, 45 females; age range, 16-90 years; mean age, 49.3 years) were APP. There was no significant difference for the visibility of appendix (94% vs. 91%; P = .589) and radiological characters between the CCT and NCT groups. There were significant differences between the two groups for sensitivity (100% vs. 90.5%; P = .036), specificity (94.8% vs. 100%; P = .038), PPV (93.3% vs. 100%; P = .021), NPV (100% vs. 93.5%; P = .021), but no significant difference for accuracy (97% vs. 96%; P = 1). The appendix was easier to detect on CCT than NCT images (P = .013). Conclusion: The diagnostic sensitivity of CCT was significantly better than that of NCT. Intravenous contrast administration could also make doctors easier in indentifying appendixes.

KW - Acute appendicitis

KW - Computed tomography

KW - Contrast medium

KW - Length of stay

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