Clinical trial NCT04695964: Objective Perfusion Rate Assessment by Near-infrared Fluorescence in Ileal Pouch Formation and Ileal-pouch-anal Anastomosis
Official title: The Value of Objective Perfusion Rate Assessment by Near-infrared Fluorescence During Restorative Ileal Pouch Formation and Ileal-pouch-anal Anastomosis
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: NA
Conditions: Ulcerative Colitis
Colorectal Cancer
Crohn Disease
Familial Adenomatous Polyposis
Ulcerative Colitis in Remission
Ulcerative Colitis Chronic
Crohn Colitis
Ileal Pouch
Keywords: indocyanine green
restorative proctocolectomy
ileal pouch-anal anastomosis
objective perfusion rate
near-infrared fluorescence
ulcerative colitis
anastomotic leak
pouchitis
image guided surgery
Lead sponsor: Charite University, Berlin, Germany
Sponsor class: OTHER
First posted: 2021-01-06
Enrollment: 50
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Intervention model description: This is a non-randomised prospective cohort study design.
Primary purpose: DIAGNOSTIC

Brief summary: In this prospective, non-randomized cohort study, real-time intraoperative visualization using near-infrared-fluorescence by indocyanine green injection (ICG-NIRF) is performed at three time points during ileal pouch reconstruction. Postoperatively, a detailed software-based assessment of each pouch recording is performed to determine the objective ICG-NIRF perfusion rate, which is then correlated with the 30 day postoperative clinical outcome including occurrence of anastomotic leak of the pouch.

Detailed description: Near-infrared-fluorescence by indocyanine green (ICG-NIRF) utilises the fluorescent property of intravenously injected indocyanine green (ICG) as an intravascular indicator of tissue and bowel perfusion.

The investigators hypothesise that ICG-NIRF is a suitable, reliable and precise method of visualisation of the blood supply and bowel perfusion in the area of ileal pouch formation and the ileal pouch-anal anastomosis.

In this prospective, non-randomized cohort study, restorative proctocolectomy with ileal pouch reconstruction and ileal pouch-anal anastomosis is performed according to standard of care for medically-refractory ulcerative colitis (UC), UC-associated neoplasia, medically-refractory Crohn´s colitis, colorectal carcinoma or familial adenomatous polyposis (FAP) in open or laparoscopic surgery, according to the surgeon's choice.

Written informed consent for participation and ICG-administration is obtained one day before surgery.

Intraoperatively, Indocyanine Green (ICG, VerDye, Diagnostic Green GmbH, Aschheim Germany, 25 mg vials) is dissolved in 5 mL sterile water to yield a 5 mg/mL concentration. It will then be administered intravenously at three consecutive time points as a bolus of 2 ml per time point at the most. The overall dose of ICG will amount to no more than 30mg of ICG per patient.

Real-time intraoperative visualization is performed with the SpectrumTM Fluorescence Imaging Platform (Quest Innovations, Middenmeer, The Netherlands) directly after each ICG injection assessing bowel perfusion at three different time points respectively: before and after J-Pouch construction by stapler anastomosis and after ileoanal anastomosis formation.

Postoperative NIRF-perfusion rate assessment Using the Quest Research SoftwareTM, the recordings before and after anastomosis formation will be analysed for their perfusion rate. This analysis will provide objective, quantitative data on the perfusion for a certain time frame which is determined by the length of the video recording. This data will be collected for statistical analysis and correlation with anastomotic leak as well as postoperative outcome.

Clinical data and follow-up Clinical data will be collected from all patients regarding anastomotic leak, bowel ischemia and necrosis as well as 30 day postoperative morbidity, mortality and length and cost of hospital stay.

Further data analysis will be performed using Microsoft Excel® and IBM SPSS®.

Eligibility criteria: Inclusion Criteria:

* age ≥ 18
* capability of signing the informed consent
* diagnosis of therapy resistent ulcerative colitis, colorectal cancer, Crohn's disease, familial adenomatous polyposis
* restorative proctocolectomy (RPC) with reconstruction through ileal pouch formation and ileal pouch-anal anastomosis (IPAA) is possible and medically indicated
* ASA (American Society of Anesthesiologists) Physical Status Classification System score ≤ 3

Exclusion Criteria:

* coexistent malignant tumor of a different ethology
* liver disfunction (MELD score \> 10)
* ICG (indocyanine green) specific exclusion criteria as per literature (intolerance to indocyanine green or sodium iodide, iodine allergy, hyperthyroidism, autonomous thyroid adenoma, focal or diffuse autonomies of the thyroid, previously badly tolerated injection of ICG)
* pregnancy or breastfeeding

Primary outcomes:
measure: anastomotic leak
timeFrame: 30 days
Secondary outcomes:
measure: Operative and post-operative complications
timeFrame: 30 days
measure: Length of post-operative hospital stay
timeFrame: 100 days
Other outcomes:
Locations:
city: Berlin
country: Germany
facility: Charité Campus Benjamin Franklin
Study officials:
References:
citation: van den Bos J, Jongen ACHM, Melenhorst J, Breukink SO, Lenaerts K, Schols RM, Bouvy ND, Stassen LPS. Near-infrared fluorescence image-guidance in anastomotic colorectal cancer surgery and its relation to serum markers of anastomotic leakage: a clinical pilot study. Surg Endosc. 2019 Nov;33(11):3766-3774. doi: 10.1007/s00464-019-06673-6. Epub 2019 Feb 1.
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citation: Perbeck L, Lindquist K, Proano E, Liljeqvist L. Correlation between fluorescein flowmetry and laser Doppler flowmetry. A study in the intestine (ileoanal pouch) in man. Scand J Gastroenterol. 1990 May;25(5):520-4. doi: 10.3109/00365529009095524.
citation: Hallbook O, Johansson K, Sjodahl R. Laser Doppler blood flow measurement in rectal resection for carcinoma--comparison between the straight and colonic J pouch reconstruction. Br J Surg. 1996 Mar;83(3):389-92. doi: 10.1002/bjs.1800830330.
citation: van den Bos J, Al-Taher M, Schols RM, van Kuijk S, Bouvy ND, Stassen LPS. Near-Infrared Fluorescence Imaging for Real-Time Intraoperative Guidance in Anastomotic Colorectal Surgery: A Systematic Review of Literature. J Laparoendosc Adv Surg Tech A. 2018 Feb;28(2):157-167. doi: 10.1089/lap.2017.0231. Epub 2017 Nov 6.
citation: Degett TH, Andersen HS, Gogenur I. Indocyanine green fluorescence angiography for intraoperative assessment of gastrointestinal anastomotic perfusion: a systematic review of clinical trials. Langenbecks Arch Surg. 2016 Sep;401(6):767-75. doi: 10.1007/s00423-016-1400-9. Epub 2016 Mar 11.