Stomal Sleeve Attachment via Circular Stapling Device
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Solution Overview
Problem
During ostomy procedures, there is a need to minimize skin irritation and infection caused by fecal matter leakage from ostomy bags by creating a barrier between the skin and the collected fecal matter, which existing methods fail to adequately address.
Innovation Solution
A circular stapling device with an anvil and shell assembly is used to attach a stomal sleeve to a stoma, where the sleeve is secured to the anvil assembly and then fired to clamp and staple the intestinal tissue, creating a barrier between the skin and fecal matter, with an annular knife cutting the sleeve to separate it from the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a stomal sleeve is attached to create a barrier between skin and fecal matter, then skin protection is improved, but device complexity increases
Solution Approach 1:
The device divides the attachment process into distinct functional components: the stomal sleeve as a separate barrier element, the anvil assembly with staple pockets, the cartridge assembly with staples, and the cutting element. This segmentation allows each component to perform its specific function independently while working together to achieve skin protection.
Solution Approach 2:
The stomal sleeve acts as an intermediary barrier between the fecal matter in the ostomy bag and the patient's skin. By introducing this intermediate protective layer, the device prevents direct contact between harmful substances and the skin, thereby reducing irritation and infection risk.
2Reliability
If a circular stapling device is used to secure the stomal sleeve, then attachment reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The circular stapling device is designed to perform multiple functions: it secures the stomal sleeve to the intestine, creates an anastomosis between intestinal segments, and can be used in various ostomy procedures. This multi-functionality justifies the increased operational complexity by providing a reliable, versatile attachment solution.
Solution Approach 2:
The device prepares the attachment site in advance by positioning the stomal sleeve on the anvil assembly before insertion, pre-loading staples in the cartridge, and establishing the correct orientation of components. This preliminary preparation ensures reliable attachment during the actual surgical procedure.
3Manufacturing precision
If the anvil head is designed with staple deforming pockets, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The anvil head features localized staple deforming pockets at specific positions where staples need to be formed. Rather than making the entire anvil head complex, only the specific regions requiring staple deformation are structured with precise pockets, while other areas maintain simpler geometry.
Solution Approach 2:
The stapling mechanism utilizes mechanical force transmitted through the anvil head to deform staples into the tissue. The precise geometry of the staple deforming pockets ensures consistent staple formation through controlled mechanical action, achieving reliable attachment without requiring excessive device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively secures a stomal sleeve to the stoma, reducing skin irritation and infection by creating a barrier between the skin and fecal matter, ensuring proper attachment and minimizing leakage.
Implementation Method 1
A circular stapling device with an anvil and shell assembly is used to attach a stomal sleeve to a stoma, where the sleeve is secured to the anvil assembly and then fired to clamp and staple the intestinal tissue
Implementation Method 2
with an annular knife cutting the sleeve to separate it from the device
Data Source
AI summary
The presently disclosed stapling device includes a stomal sleeve secured to an anvil assembly of a tool assembly of the stapling device. The stomal sleeve has a tubular configuration having a first end portion secured to a tissue contact surface of the anvil assembly and a second end portion secured to a distal face of an anvil head of the anvil assembly. In use, the stapling device is fired to secure the first end portion of the stomal sleeve to dermal and intestinal tissue within a stoma and to separate the first end portion of the stomal sleeve from the anvil assembly. When the stapling device is withdrawn from the stoma, the second end portion of the stomal sleeve is withdrawn from the stoma and subsequently disengaged from the anvil head of the anvil assembly such that the second end portion of the stomal sleeve is positioned externally of the stoma.