Normal Range of Superior Mesenteric Artery in Young Chinese Population and Its Correlation With Retroperitoneal Adipose Tissue
Study Details
Study Description
Brief Summary
In literature, superior mesenteric artery (SMA) angle, also named as aortomesenteric angle (AMA), varies greatly in both adult and children; while the aortomesenteric distance also ranges widely. Both AMA and AMD are influenced by retroperitoneal fat. Decrease of AMA and AMD may lead to the superior mesenteric artery syndrome(SMAS), which is a rare medical condition mainly presenting with duodenum obstruction. To our knowledge, normal range of AMA and AMD in local young Chinese population remain unclear; on the other hand, there have only a few studies exploring the relationship between them. This project proposes to establish the normal range of AMA and AMD in local young Chinese population, and to further investigate how the retroperitoneal adipose tissue correlates with AMA and AMD. The normal range obtained in this proposed study will provide more specific reference value to distinguish abnormal AMA and AMD, and to improve the diagnosis accuracy of SMAS in local population. Moreover, this study will provide deeper insight concerning the impact of retroperitoneal fat on AMA and AMD.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
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Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Non-SMAS group subjects in this group are not clinically diagnosed as superior mesenteric artery syndrome(SMAS). |
Diagnostic Test: computerized tomography
abdomen contrast computerized tomography performed for both emergency and elective purposes in HK public hospitals.
|
| SMAS group subjects in this group are clinically diagnosed as superior mesenteric artery syndrome(SMAS). |
Diagnostic Test: computerized tomography
abdomen contrast computerized tomography performed for both emergency and elective purposes in HK public hospitals.
|
Outcome Measures
Primary Outcome Measures
- aortomesenteric angle (AMA) [2 years]
aortomesenteric angle in degree measured on sagittal CT image
- aortomesenteric distance (AMD) [2 years]
aortomesenteric distance in millimeter(mm) on axial CT image
- visceral fat area [2 years]
visceral fat area in square centimeter(cm2) evaluated by image post-processing software
- subcutaneous fat area [2 years]
subcutaneous fat area in square centimeter(cm2) evaluated by image post-processing software
- area ratio of visceral fat to subcutaneous fat [2 years]
area ratio in percentage(%)
Eligibility Criteria
Criteria
Inclusion Criteria:
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With age range of 10-35 years old.
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Chinese ethnicity.
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With abdomen contrast CT.
Exclusion Criteria:
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Any patients with diagnosis of SMAS will be excluded from the Non-SMAS group.
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Patients who had undergone more than one CT scan during the research period.
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Previous retroperitoneal, abdominal surgery.
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Conditions causing significant weight loss, e.g. anorexia nervosa, malabsorption.
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Presence of abdominal masses or pathology that will affect the anatomy of aorta- superior mesenteric artery and the retroperitoneal structures.
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Presence of severe scoliosis and/or history of spinal fixation that may increase incidence of SMA syndrome.
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Presence of free intraperitoneal or retroperitoneal fluid that may affect fat measurement, e.g. following trauma, or ascites.
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | Department of Radiology， North District Hospital | Hong Kong | China |
Sponsors and Collaborators
- Chinese University of Hong Kong
- North District Hospital
Investigators
- Principal Investigator: Kai Ho Yam, MBChB, Department of Radiology, North District Hospital, Hong Kong
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- 2019.310