The C-seal: A Biofragmentable Drain Protecting the Stapled Colorectal Anastomosis from Leakage
November 4th, 2010
The C-seal is a biofragmentable drain protecting the stapled colorectal anastomosis. In this video, details of the manufacturing, deployment and use are shown.
Colorectal anastomotic leakage is a serious complication after colorectal surgery leading to high morbidity and mortality rates. In this surgical procedure, the C seal, a bio fragmental drain is stapled to the colorectal anastomosis to protect the anastomosis from leakage. First, the C seal is attached to the anvil of the Circular stapler.
Next, the anvil with The attached C seal is inserted into the proximal bowel loop. The circular stapler is then fired to attach the C seal to the bowel anastomosis, and the stapler is removed from the rectum. By removing the stapler, the C seal is withdrawn from the anus.
Finally, the C seal is cut four centimeters from the anal verge and the C seal is left protruding from the anus. The main advantage of using the C seal over existing methods is that the CIL protects against extra of feces outside the bowel lumen in case of colorectal anastomotic dsn. Well, the sea seal looks like the concept used in the 1980s by they invented the color shield.
But the big difference between the CIL and the color shield is that the sea seal is attached together with the stapling machine and the color shield is attached in the bowel proximal to the anastomotic side. So you have to do an an extra handling to attach the color shield inside the bowel, and that takes a lot of time, extra surgical time, and the CSO is attached together with a surgical stapler to the anastomotic site, and thereby no extra delays introduced in the surgical procedure, Dilute the polymer to a suitable concentration for spray coating and spray the polyurethane solution On a rotating mold to a certain thickness, the concentration of the spray solution is 4%The wall thickness of the C seal is 70 micrometers after 30 minutes, release the C seal by placing the mold in a room. Temperature water bath once released, the C seal is dried by freeze drying in a minus 18 degrees Celsius freezer for two hours.
The C seal is packaged in a Tyvek pouch and sterilized using ethylene oxide gas prior to use. The C seal can be stored for 12 months at or below Four degrees Celsius. The C seal can be applied in anastomosis within 15 centimeters, distance from the anal verge.
Often this is a low interior resection. The patient in the video is suffering from diverticular disease and has a stenotic colon. Therefore, a more extensive resection of the sigmoid colon was necessary.
This protocol starts at the moment that the well vascularized afferent bowel loop can be tension-free anastos with the rectum stump, Using A fresh pair of sterile surgical gloves. Unpack the pre sterilized C seal and a sterilized 12 millimeter stainless steel marble onto a clean, sterile surface. Next, open the C seal.
Insert the marble, and then insert the anvil with the connecting pin. First, using two strips of adhesive tape, attach the C seal to the anvil firmly. Press the adhesive strips Of the C seal onto the stapler head.
Advance the Anvil into the C seal so that the connection pin punctures the open pointed end of the C seal. Then gently unfold the C seal completely and make sure that the marble ends up inside the C seal away from the anvil. If you do not completely unfold the C seal, it can become double stapled and can get stuck at the anastomotic site.
Insert the anvil together with the C seal in the proximal bowel loop by first advancing the tail of the CIL with the help of the marble. If needed, use blunt forceps to facilitate this. Ensure the tail of the C seal is placed upwards in the bowel, and make sure the tail of the C seal is stretched.
The tail orientation is important because you do not want the tail to be stapled together with the anastomosis. When creating a side to end anastomosis, penetrate the bow wall with the anvil's pin staple off the stenotic colon. Check the position of the marble, which should be at least six centimeters away from the anvil.
We advise to create a purse string suture around the pin for extra support, gently dilate the anus and Insert the stapler in the rectum. Connect the anvil with the stapler. Fire the circular stapler.
At this point, the bowel is reconnected and the C seal is attached to the staples. Gently pull out the stapler through the anus. After opening the stapler, according to the corresponding protocol, the stapler should not be turned more than 180 degrees when pulling out the stapler.
Otherwise, the C seal may twist as the stapler is removed from the anus. The C seal is pulled through the anus, cut the C seal approximately four centimeters from the anus. When the C seal is applied correctly, it covers the anastomosis.
Remove the marble from the rectum. Often the marble comes out together with the C seal. If not gently, manually remove the marble, which is situated between the C seal and the intestinal wall.
Optionally, an air test is done to verify the anastomosis. This is done by filling the pelvis with saline solution and simultaneously injecting air into the anal canal within the C seal, and between the C seal and the bowel. Absence of bubbles confirms a complete anastomosis.
If a nce forms at the anastomotic site or below the anastomotic site, the cyl covers that gap. So in case of that de essence, the feces is not able to flow outside the bowel lumen. Since the C seal covers the defect and the C seal directs actually the fecal stream outside the bowel lumen through the anus, the C seal can cause some hygienic discomfort due to soiling as long as the sea seal crosses the anal swinger, and therefore, we advise to rinse the sea with water after the ation.
When the sea seal is applied correctly on the Anil, it should look like this. Ensure the tail of the sea seal is stretched before firing the stapler. Therefore, check the position of the marble, which should be at least six centimeters away from the anvil.
When pulling the stapler out of the anus, the C seal comes out together with the stapler. After cutting the C seal at approximately four centimeters from the anal verge, the C seal is left protruding from the anus. When the patient is recovered and no anastomotic complications are suspected, the CCL can be cut off at the level of the anus.
The remainder of the CCL will degrade over time and the patient will expel it with normal stool production. After watching this video, you should have a good understanding of the rationale and the application of the CIL and patient's undergoing colorectal resection with the creation of a colorectal anastomosis.
Overview
The C-seal is a biofragmentable drain designed to protect stapled colorectal anastomoses from leakage. This article details the manufacturing, deployment, and application of the C-seal in surgical procedures.
Key Study Components
Area of Science
- Surgery
- Colorectal procedures
- Medical devices
Background
- Colorectal anastomotic leakage is a significant complication post-surgery.
- The C-seal aims to reduce morbidity and mortality associated with these leaks.
- It is designed to be attached during the stapling process, minimizing surgical delays.
- The C-seal is a modern alternative to older methods like the color shield.
Purpose of Study
- To demonstrate the effectiveness of the C-seal in preventing anastomotic leakage.
- To provide a detailed protocol for its application in surgical settings.
- To compare the C-seal with traditional methods of protecting anastomoses.
Methods Used
- Attachment of the C-seal to the circular stapler.
- Insertion of the stapler into the proximal bowel loop.
- Firing the stapler to secure the C-seal to the anastomosis.
- Post-operative verification of anastomosis integrity through air testing.
Main Results
- The C-seal effectively covers the anastomosis, preventing leakage.
- It simplifies the surgical procedure by eliminating extra handling.
- Patients reported some hygienic discomfort, manageable with rinsing.
- Air tests confirmed the integrity of the anastomosis in most cases.
Conclusions
- The C-seal is a promising tool for enhancing colorectal surgery outcomes.
- It reduces the risk of anastomotic leakage compared to traditional methods.
- Further studies may be needed to evaluate long-term outcomes.
Frequently Asked Questions
Executive Industry Relevance
Colorectal anastomotic leakage remains a significant clinical challenge with high morbidity and mortality, driving demand for reliable intraoperative protective strategies. The C-seal offers a biofragmentable drain solution that integrates directly with stapling workflows to contain luminal contents in the event of dehiscence, thereby reducing peritoneal contamination risk. This approach supports mechanistic de-risking in surgical innovation by addressing a key failure mode without altering anastomotic technique, providing a translatable safety layer for preclinical and early clinical evaluation of anastomotic integrity.
Strategic Applications in Biopharma R&D
Early Discovery & Target Validation
- Scientific Value: Enables interrogation of anastomotic integrity hypotheses by isolating leakage consequences from healing biology.
- Operational Value: Provides a reproducible containment model to evaluate dehiscence frequency independent of peritoneal outcomes.
Screening & Assay Development
- Scientific Value: Supports development of quantitative leakage assays using air or dye test readouts within a sealed luminal compartment.
- Operational Value: Standardizes anastomotic protection across models, improving inter-study comparability of sealant or healing agent efficacy.
Translational & Preclinical Research
- Scientific Value: Bridges bench-to-bedside by testing devices in continuity with clinical stapling procedures and postoperative monitoring.
- Operational Value: Allows longitudinal assessment of device degradation and expulsion kinetics relevant to GI transit and biocompatibility.
Pipeline & Workflow Integration
The C-seal fits within the surgical innovation continuum from device prototyping to preclinical validation and early-phase clinical testing, particularly for anastomotic protection strategies in colorectal device development.
- Discovery Biology: Facilitates mechanistic studies of leak formation by preventing confounding peritoneal contamination, enabling clearer interpretation of healing pathways.
- Screening: Provides a standardized barrier for evaluating novel biomaterials or crosslinkers intended for anastomotic reinforcement.
- Analytics: Enables quantitative assessment via air test or imaging to confirm luminal seal integrity as a functional readout.
- Translational Research: Supports continuity from benchtop extrusion and sterilization to intraoperative deployment and postoperative excretion profiling.
- Enterprise Reuse: Represents a platform-compatible drain design adaptable to various stapler types and anastomotic levels within 15 cm of the anal verge.
Operational & Enterprise Impact
- Scientific Value: Reduces biological noise in leakage studies by containing effluent, improving signal-to-noise in mechanistic assessments.
- Operational Value: Eliminates extra handling steps compared to prior shields, preserving OR efficiency and minimizing procedural variability.
- Strategic Value: Enables go/no-go decisions based on anastomotic technical success rather than leak-driven morbidity, refining device efficacy evaluation.
- Portfolio Impact: Supports risk-adjusted advancement of anastomotic technologies by mitigating early failure modes in feasibility studies.
Implementation Considerations
- Requires expertise in colorectal surgical techniques and stapler device handling.
- Dependent on sterile manufacturing capabilities for biofragmentable polyurethane extrusion and ethylene oxide sterilization.
- Necessitates standardization of deployment depth (within 15 cm of anal verge) and tail orientation to avoid inadvertent stapling.
- Adaptation considerations include varying bowel wall thickness and stenotic segments affecting insertion and marble positioning.
- Practical limitations include transient hygienic discomfort due to perianal soiling, manageable with postoperative irrigation.
