The Anatomical Localization of the Inferior Mesenteric Artery in Relation to the Left Colonic Artery

Study Overview
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Brief Summary
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To observe and measure the distance between the origin of LCA (left colonic artery，LCA) and IMA (inferior mesenteric artery，IMA) root and the distance between IMA and IMV (inferior mesenteric vein，IMV) at the origin of LCA in rectal cancer patients. Statistical analysis of intraoperative measured data, on the basis of the original anatomical relationship, to achieve anatomical localization of quantitative and accurate, for the preservation of LCA laparoscopic radical resection of rectal cancer to provide a strong anatomical basis. The operation time, 253 lymph node dissection time, intraoperative blood loss, postoperative anal exhaust time, postoperative feeding time, postoperative hospital stay, postoperative ischemic colitis rate and postoperative anastomotic leakage rate of patients with laparoscopic radical resection of rectal cancer with preservation of LCA were recorded. The surgical efficacy and clinical significance of laparoscopic radical resection of rectal cancer with preservation of LCA were evaluated.

Official Title
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A Prospective, Observational Study of the Anatomical Localization of the Inferior Mesenteric Artery in Relation to the Left Colonic Artery During Laparoscopic Radical Surgery for Rectal Cancer

Conditions
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Rectal Cancer

Intervention / Treatment
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* Behavioral: measurement group


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Pathological diagnosis of rectal cancer (T2-4a, N- / +, M0) ; Laparoscopic radical resection of rectal cancer and preservation of LCA Patients and their families agree to participate in the clinical study Exclusion Criteria: Those who had a history of lower abdominal surgery and could not undergo laparoscopic surgery LCA vascular absence was found during operation combined with other malignant tumors pregnant or lactating patients Combined with severe mental illness Severe diseases of the blood system, coagulation dysfunction ; Preoperative assessment of heart, lung and brain function, unable to tolerate surgery.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 75 Years

Sexes Eligible for Study
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All

Study Plan
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How is the study designed?
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Arms and Interventions

| Intervention/Treatment |
| --- |
|Behavioral: measurement group|Measurement of the distance between the origin of LCA (left colonic artery，LCA) and IMA (inferior mesenteric artery，IMA) root and the distance between IMA and IMV (inferior mesenteric vein，IMV) at the origin of LCA in rectal cancer patients|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Distance between LCA and IMA | Measurement of the distance between the origin of LCA (left colonic artery，LCA) and IMA (inferior mesenteric artery，IMA) root | intraoperative | 
| The distance from LCA to IMA and IMV | Measurement of the distance between IMA and IMV (inferior mesenteric vein，IMV) at the origin of LCA | intraoperative | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| operation time | From the beginning of anesthesia to the patient leaving the operating room | intraoperative | 
| 253 lymph node dissection time | Record the time required to dissection 253 lymph node | intraoperative | 
| intraoperative blood loss | Record intraoperative bleeding | intraoperative | 
| exhaust time | Record the time of patient's first exhausting time after operation | Within one week after operation | 
| postoperative feeding time | Record the time of the patient's first meal after operation | Within one week after operation | 
| postoperative hospital time | Record the days from surgery to discharge | Within two weeks after operation | 
| postoperative anastomotic leakage rate | Record the situation of patient's anastomotic leakage | One month after operation |