Tahereh Bakhshandeh1, Abdulbaset Maleknejad2, Narges Sargolzaie3, Amin Mashhadi4, Mohadeseh Zadehmir5. 1. Department of Radiology, Torbat Heydarieh University of Medical Sciences, Torbat Heydarieh, Iran. 2. Department of Surgery, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran. 3. Community Medicine Department, Medical School, Zahedan University of Medical Sciences, Zahedan, Iran. 4. Department of Radiology, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran. 5. Department of Radiology, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran. mohadesezademir@gmail.com.
Abstract
PURPOSE: The use of spectral Doppler, peak systolic velocity (PSV), and resistive index (RI) imaging criteria to improve the accuracy of acute appendicitis diagnosis is hypothesized. METHODS: Graded compression ultrasound was performed for suspected patients. The spectral Doppler evaluation was conducted while observing the appendix. A total of 152 patients (82 males and 70 females, ages 4-63 years, mean age of 24.5 years) were examined using the spectral Doppler waveform between 2018 and 2019. RI and PSV values of patients with and without appendicitis were compared to histopathologic findings. SPSS 26 was used to analyze the data, including using descriptive statistics and measures of sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV). RESULTS: Appendicitis was confirmed in 95 patients (62.5%) and rejected in 57 patients (37.5%). For the diagnosis of appendicitis, the area under the curve (AUC) of receiver operating characteristic (ROC) for RI (0.92 with 95% confidence interval (CI): 0.88, 0.97; P = 0.001) and PSV (0.96, with 95% CI: 0.93, 1.00; P = 0.001) was calculated. The discriminatory RI ≥ 0.49 demonstrated high sensitivity (90.5%) and low specificity (86%), and the discriminatory PSV ≥ 9.6 cm/s had high specificity (94.7%) and sensitivity (94.7%) for appendicitis. CONCLUSION: By incorporating spectral Doppler criteria into routine graded compression ultrasound, the diagnostic accuracy of acute appendicitis was increased. In comparison, high PSV and RI values of the appendix with a cut-off point of 9.6 cm/s and 0.49 differ significantly between positive and negative appendectomy patients.
PURPOSE: The use of spectral Doppler, peak systolic velocity (PSV), and resistive index (RI) imaging criteria to improve the accuracy of acute appendicitis diagnosis is hypothesized. METHODS: Graded compression ultrasound was performed for suspected patients. The spectral Doppler evaluation was conducted while observing the appendix. A total of 152 patients (82 males and 70 females, ages 4-63 years, mean age of 24.5 years) were examined using the spectral Doppler waveform between 2018 and 2019. RI and PSV values of patients with and without appendicitis were compared to histopathologic findings. SPSS 26 was used to analyze the data, including using descriptive statistics and measures of sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV). RESULTS: Appendicitis was confirmed in 95 patients (62.5%) and rejected in 57 patients (37.5%). For the diagnosis of appendicitis, the area under the curve (AUC) of receiver operating characteristic (ROC) for RI (0.92 with 95% confidence interval (CI): 0.88, 0.97; P = 0.001) and PSV (0.96, with 95% CI: 0.93, 1.00; P = 0.001) was calculated. The discriminatory RI ≥ 0.49 demonstrated high sensitivity (90.5%) and low specificity (86%), and the discriminatory PSV ≥ 9.6 cm/s had high specificity (94.7%) and sensitivity (94.7%) for appendicitis. CONCLUSION: By incorporating spectral Doppler criteria into routine graded compression ultrasound, the diagnostic accuracy of acute appendicitis was increased. In comparison, high PSV and RI values of the appendix with a cut-off point of 9.6 cm/s and 0.49 differ significantly between positive and negative appendectomy patients.
Authors: H Körner; K Söndenaa; J A Söreide; E Andersen; A Nysted; T H Lende; K H Kjellevold Journal: World J Surg Date: 1997 Mar-Apr Impact factor: 3.352
Authors: Kevin A Eng; Aryan Abadeh; Carolina Ligocki; Yvonne K Lee; Rahim Moineddin; Thomasin Adams-Webber; Suzanne Schuh; Andrea S Doria Journal: Radiology Date: 2018-06-19 Impact factor: 11.105