AIM:To assess the reliability and practical applicability of the widely used Alvarado,Eskelinen,Ohhmann and Raja Isteri Pengiran Anak Saleha Appendicitis(RIPASA)scoring systems in patients with suspected acute appendi...AIM:To assess the reliability and practical applicability of the widely used Alvarado,Eskelinen,Ohhmann and Raja Isteri Pengiran Anak Saleha Appendicitis(RIPASA)scoring systems in patients with suspected acute appendicitis.METHODS:Patients admitted to our tertiary center due to suspected acute appendicitis constituted the study group.Patients were divided into two groups.appendicitis group(Group A)consisted of patients who underwent appendectomy and were histopathologically diagnosed with acute appendicitis,and non-appendicitis group(Group N-A)consisted of patients who underwent negative appendectomy and were diagnosed with pathologies other than appendicitis and patients that were followed non-operatively.The operative findings for the patients,the additional analyses from follow up of the patients and the results of those analyses were recorded using the follow-up forms.RESULTS:One hundred and thirteen patients with suspected acute appendicitis were included in the study.Of the 113 patients(62 males,51 females),the mean age was 30.2±10.1(range 18-67)years.Of the 113patients,94 patients underwent surgery,while the rest were followed non-operatively.Of the 94 patients,77patients were histopathologically diagnosed with acute appendicitis.Our study showed a sensitivity level of81%for the Alvarado system when a cut-off value of 6.5was used,a sensitivity level of 83.1%for the Ohmann system when a cut-off value of 13.75 was used,a sensitivity level of 80.5%for the Eskelinen system when a cut-off value of 63.72 was used,and a sensitivity level of 83.1%for the RIPASA system when a cut-off value of 10.25 was used.CONCLUSION:The Ohmann and RIPASA scoring systems had the highest specificity for the diagnosis of acute appendicitis.展开更多
The eruption of the Anak Krakatau volcano,Indonesia,on 22 December 2018 induced a destructive tsunami(the Sunda Strait tsunami),which was recorded by four nearby tidal gauges.In this study we invert the tsunami record...The eruption of the Anak Krakatau volcano,Indonesia,on 22 December 2018 induced a destructive tsunami(the Sunda Strait tsunami),which was recorded by four nearby tidal gauges.In this study we invert the tsunami records and recover the tsunami generation process.Two tsunami sources are obtained,a static one of instant initial water elevation and a time-dependent one accounting for the continuous evolution of water height.The time-dependent results are found to reproduce the tsunami recordings more satisfactorily.The complete tsunami generation process lasts approximately 9 min and features a two-stage evolution with similar intensity.Each stage lasts about 3.5 min and elevates a water volume of about 0.13 km3.The time,duration and volume of the volcano eruption in general agree with seismic records and geomorphological interpretations.We also test different sizes of the potential source region,which lead to different maximum wave height in the source area,but all the results of time-dependent tsunami sources show the robust feature of two stages of wave generation.Our results imply a time-dependent and complex process of tsunami generation during the volcano eruption.展开更多
文摘AIM:To assess the reliability and practical applicability of the widely used Alvarado,Eskelinen,Ohhmann and Raja Isteri Pengiran Anak Saleha Appendicitis(RIPASA)scoring systems in patients with suspected acute appendicitis.METHODS:Patients admitted to our tertiary center due to suspected acute appendicitis constituted the study group.Patients were divided into two groups.appendicitis group(Group A)consisted of patients who underwent appendectomy and were histopathologically diagnosed with acute appendicitis,and non-appendicitis group(Group N-A)consisted of patients who underwent negative appendectomy and were diagnosed with pathologies other than appendicitis and patients that were followed non-operatively.The operative findings for the patients,the additional analyses from follow up of the patients and the results of those analyses were recorded using the follow-up forms.RESULTS:One hundred and thirteen patients with suspected acute appendicitis were included in the study.Of the 113 patients(62 males,51 females),the mean age was 30.2±10.1(range 18-67)years.Of the 113patients,94 patients underwent surgery,while the rest were followed non-operatively.Of the 94 patients,77patients were histopathologically diagnosed with acute appendicitis.Our study showed a sensitivity level of81%for the Alvarado system when a cut-off value of 6.5was used,a sensitivity level of 83.1%for the Ohmann system when a cut-off value of 13.75 was used,a sensitivity level of 80.5%for the Eskelinen system when a cut-off value of 63.72 was used,and a sensitivity level of 83.1%for the RIPASA system when a cut-off value of 10.25 was used.CONCLUSION:The Ohmann and RIPASA scoring systems had the highest specificity for the diagnosis of acute appendicitis.
基金supported by the National Natural Science Foundation of China(Grant Nos.U1901602,11632012,41861144024 and 41974017).
文摘The eruption of the Anak Krakatau volcano,Indonesia,on 22 December 2018 induced a destructive tsunami(the Sunda Strait tsunami),which was recorded by four nearby tidal gauges.In this study we invert the tsunami records and recover the tsunami generation process.Two tsunami sources are obtained,a static one of instant initial water elevation and a time-dependent one accounting for the continuous evolution of water height.The time-dependent results are found to reproduce the tsunami recordings more satisfactorily.The complete tsunami generation process lasts approximately 9 min and features a two-stage evolution with similar intensity.Each stage lasts about 3.5 min and elevates a water volume of about 0.13 km3.The time,duration and volume of the volcano eruption in general agree with seismic records and geomorphological interpretations.We also test different sizes of the potential source region,which lead to different maximum wave height in the source area,but all the results of time-dependent tsunami sources show the robust feature of two stages of wave generation.Our results imply a time-dependent and complex process of tsunami generation during the volcano eruption.
