- Open Access
Evaluation of blood flow on the remnant distal bowel during left-sided colectomy
© The Author(s). 2018
- Received: 27 February 2018
- Accepted: 5 September 2018
- Published: 13 September 2018
Adequate blood flow in anastomosis is of paramount importance to prevent anastomotic leakage. However, it is sometimes difficult to predict the viability of the intestine during surgery. During left-sided colectomy, blood flow on the remnant distal bowel is supplied only from the middle and inferior rectal arteries. The blood backflow after the root ligation of the inferior mesenteric artery is often said to be kept up to promontorium levels; however, this premise is actually based on experience, without reliable evidence. Here, we introduce the intraoperative evaluation of blood flow on the remnant distal bowel during left-sided colectomy using an indocyanine green fluorescence technique.
- Anastomotic leakage
- Left-sided colectomy
- Indocyanine green
Anastomotic leakage (AL) is one of the most dreadful complications occurring after surgery for colorectal cancer. The reported incidence rate of AL after colorectal surgery ranges from 3 to 19%. AL can cause increased morbidity, mortality, length of hospital stay, cost, and risk of cancer recurrence [1, 2]. Adequate blood flow in anastomosis is of paramount importance for the prevention of AL; however, it is sometimes difficult to predict the viability of the ischemic bowel during surgery. The intraoperative evaluation of the intestinal blood flow is mostly performed by gross findings such as color, peristalsis, pulsation, and/or bleeding. It is largely dependent on the surgeon’s skill and experience. Therefore, objective and accurate measurements of intestinal blood flow could reduce AL.
During left-sided colectomy with root ligation of the inferior mesenteric artery (IMA), the blood flow on the remnant distal bowel is supplied from the middle and inferior rectal arteries. The blood backflow is often said to be kept up to promontorium levels after the root ligation of the IMA; however, this premise is based on experience without any evidence. In clinics, excessive sacrifice of the remnant distal bowel due to lack of objective indicators of blood flow is a possibility.
Indocyanine green (ICG) has been used for several decades to evaluate cardiac output, liver function, liver blood flow, and ophthalmic blood flow . In recent years, an ICG fluorescence technique with near-infrared light has become a promising technique for evaluating intestinal blood flow intraoperatively .
While several reports showed the evaluation of blood flow on the remnant proximal bowel during left-sided colectomy, only a few studies evaluated the remnant distal bowel [3, 4]. We introduce an evaluation of blood flow on the remnant distal bowel during left-sided colectomy using an ICG fluorescence technique.
The patient was discharged without complications on postoperative day 10. Our case showed a morbid risk for AL if the root ligation of the IMA had been performed without the intraoperative blood flow evaluation on the remnant distal bowel.
The rate of lymph node metastasis around the root of the IMA is 3.6% in patients with T3/T4 sigmoid colon cancer . In Japan, the surgical procedure, with the dissection of lymph nodes along with IMA and the ligation and division on the root of the LCA, is commonly performed. This procedure is based on the concept of the significance of the lymph node dissection around the root of the IMA by means of the root ligation of the IMA, as well as the significance of preserving anastomotic perfusion by preserving the superior rectal artery. In our case, the operation was also performed according to this concept.
Regarding the blood flow in the left side of the colon or rectum, several studies have reported mainly on Sudeck’s critical point. These reports anatomically clarified the continuity of blood flow in the remnant proximal bowel after left-sided colectomy with anatomical examinations using radiography or autopsy [6, 7]. The examination of the blood flow in the remnant distal bowel after left-sided colectomy was also conducted in a few studies. These publications reported the variation in the middle rectal artery and anatomically examined the perfusion area of the superior, middle, and inferior rectal arteries [8, 9]. However, no functional evaluation has been performed so far.
Our case revealed the possibility of preserving more of the remnant distal bowel using the ICG fluorescence technique. This technique also can be applied in cases where there is damage to marginal vessels during surgery or in cases with severe arterial sclerosis.
During left-sided colectomy, the distal side of the bowel was often excessively resected forcing the anastomosis to be performed at points lower than the promontorium. However, the lower anastomosis makes the procedure difficult to perform and may cause anastomotic failure. Preserving a longer remnant distal bowel is desirable to minimize anastomotic tension and promote postoperative bowel function if enough blood supply and the margin from the tumor can be confirmed. Larger studies of the ICG fluorescence technique are needed to confirm and verify the effects on AL.
TO designed the work and wrote the manuscript. MO, TH, JK, MO, YK, and TT assisted with the acquisition of the images and also with manuscript revision. All authors read and approved the final manuscript.
Ethics approval and consent to participate
The protocol for this research project was approved by the Ethics Committee of the institution where the work was undertaken. The procedures conformed to the provisions of the Declaration of Helsinki of 1995 (as revised in Brazil,2013).
Consent for publication
Written informed consent was obtained from the patient for publication of this report and any accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal.
The authors declare that they have no competing interests.
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- Kang CY, Halabi WJ, Chaudhry OO, et al. Risk factors for anastomotic leakage after anterior resection for rectal cancer. JAMA Surg. 2013;148:65–71.View ArticlePubMedGoogle Scholar
- Mirnezami A, Mirnezami R, Chandrakumaran K, et al. Increased local recurrence and reduced survival from colorectal cancer following anastomotic leak: systematic review and meta-analysis. Ann Surg. 2011;253:890–9.View ArticlePubMedGoogle Scholar
- Keller DS, Ishizawa T, Cohen R, et al. Indocyanine green fluorescence imaging in colorectal surgery: overview, applications, and future directions. Lancet Gastroenterol Hepatol. 2017;2:757–66.View ArticlePubMedGoogle Scholar
- Jafari MD, Wexner SD, Martz JE, et al. Perfusion assessment in laparoscopic left-sided/anterior resection (PILLAR II): a multi-institutional study. J Am Coll Surg. 2015;220:82–92.View ArticlePubMedGoogle Scholar
- Japanese Society for Cancer of the Colon and Rectum. Japanese classification of colorectal carcinoma. 8th ed. Tokyo: Kanehara & Co. Ltd; 2013.Google Scholar
- Griffiths JD. Surgical anatomy of the blood supply of the distal colon. Ann R Coll Surg Engl. 1956;14:241–56.Google Scholar
- Goligher JC. The blood supply of the sigmoid colon and rectum with reference to the technique of rectal resection with restoration of continuity. Br J Surg. 1949;37:157–62.View ArticlePubMedGoogle Scholar
- Michels NA, Siddharth P, Kornblith PL, et al. The variant blood supply to the descending colon, rectosigmoid and rectum based on 400 dissections. Dis Colon Rectum. 1965;8:251–78.View ArticlePubMedGoogle Scholar
- Boxall TA, Smart JG, Grifhths JD. The blood supply of the distal segment of the rectum in anterior resection. Br J Surg. 1963;50:399–404.View ArticlePubMedGoogle Scholar