Clinical Characteristics,MSCT Signs and Prognosis of Spontaneous Isolated Superior Mesenteric Artery Dissection
Objective To investigate the clinical characteristics,MSCT signs and prognosis of spontaneous isolated superior mesenteric artery dissection(SISMAD).Methods A total of 85 patients with SISMAD admitted to Beijing Huairou Hospital from November 2015 to November 2022 were selected as the study subjects,and their clinical data were collected.All patients were examined with MSCT.The patients were divided into asymptomatic group(n=16)and symptomatic group(n=69)according to the presence or absence of clinical symptoms.Clinical characteristics,multi-slice spiral CT(MSCT)signs and prognosis of the two groups were compared.Results There were statistically significant differences between the asymptomatic group and the symptomatic group in term of clinical characteristics such as hypoactive bowel sound,hypertension,elevated homocysteine and long-term smoking history(P<0.05).The MSCT signs such as thrombosis,length of dissection,inlet diameter,diameter of true lumen,true lumen stenosis degree and Yoo classification in the two groups were significantly different(P<0.05).Among the 16 asymptomatic patients,10 patients were observed without special treatment,5 patients were given medical conservative treatment,and 1 patient was given intracavitary treatment.Condition of the 16 patients was effectively controlled.Among the 69 symptomatic patients,46 patients were given medical conservative treatment,2 patients were converted to intracavitary treatment for worsening abdominal pain,16 patients were given intracavitary treatment,and 7 patients were treated with surgery such as bypass grafting and intima resection.All patients recovered well.Conclusion Abdominal pain is the main clinical manifestation of SISMAD,but there are also some asymptomatic patients.Thrombosis,length of dissection,inlet diameter,diameter of true lumen,true lumen stenosis degree,and Yoo classification are helpful to evaluate the severity of SISMAD and guide the development of follow-up treatment plans.