COMPARISON OF VALUES OF MRI IMAGING AND ULTRASOUND IN THE DIAGNOSIS OF APPENDICITIS IN PREGNANCY

Thanh Dũng Lê1,2,, Thị Kim Dung Nguyễn3
1 Viet Duc Hospital
2 VNU - School of Medicine and Pharmacy
3 Hanoi medical university

Main Article Content

Abstract

Objectives: Compare the sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of ultrasound (US) and magnetic resonance imaging (MRI) in evaluation of pregnant patients with a clinical suspicion of appendicitis. Methods and subject: We reviewed the data of pregnant patients with suspected appendicitis underwent US and MRI. Gold standard for diagnosis and surgery and pathology. For non-operative patients, based on patient follow-up results. The sensitivity, specificity, PPV, and NPV were calculated for US and MRI in the diagnosis of appendicitis. Results: The ability to see the appendix on MRI is 90.38% significantly higher than ultrasound at 28.85%. The Se, Sp, PPV, NPV values of MRI are 92.3%, 94.9%, 85.7%, 97.4%, and of ultrasound are 53.8%, 97.4%, 87 .5%, 86.4%, respectively. Conclusions: MRI has a better value in diagnosing appendicitis in pregnancy than ultrasound. The role of US in the diagnosis of appendicitis in pregnancy is limited mainly because the appendix is not observed.

Article Details

References

1. Andersen B. và Nielsen T.F. (1999). Appendicitis in pregnancy: diagnosis, management and complications. Acta Obstet Gynecol Scand, 78(9), 758–762.
2. Shin I., An C., Lim J.S. và cộng sự. (2017). T1 bright appendix sign to exclude acute appendicitis in pregnant women. Eur Radiol, 27(8), 3310–3316.
3. Pritchard J.A. và Rowland R.C. (1964). Blood volume changes in pregnancy and the puerperium. Iii. Whole body and large vessel hematocrits in pregnant and nonpregnant women. Am J Obstet Gynecol, 88, 391–395.
4. Israel G.M., Malguria N., McCarthy S. và cộng sự. (2008). MRI vs. ultrasound for suspected appendicitis during pregnancy. Journal of Magnetic Resonance Imaging, 28(2), 428–433.
5. Pedrosa I., Lafornara M., Pandharipande P.V. và cộng sự. (2009). Pregnant patients suspected of having acute appendicitis: effect of MR imaging on negative laparotomy rate and appendiceal perforation rate. Radiology, 250(3), 749–757.
6. Lehnert B.E., Gross J.A., Linnau K.F. và cộng sự. (2012). Utility of ultrasound for evaluating the appendix during the second and third trimester of pregnancy. Emerg Radiol, 19(4), 293–299.
7. Lim H.K., Bae S.H., và Seo G.S. (1992). Diagnosis of acute appendicitis in pregnant women: value of sonography. American Journal of Roentgenology, 159(3), 539–542.
8. Incesu L., Coskun A., Selcuk M.B. và cộng sự. (1997). Acute appendicitis: MR imaging and sonographic correlation. American Journal of Roentgenology, 168(3), 669–674.