Segmented Cardiovascular Cannula Minimizes Tissue Trauma
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Solution Overview
Problem
Current cardiovascular cannulas for extracorporeal blood circulation often result in tissue damage and scarring due to their large diameter and the need for incisions, which are aesthetically undesirable and cause trauma to the body.
Innovation Solution
A cardiovascular cannula system with a modular design featuring thin, piercing tips and ducts that transfix tissue minimally, allowing for extracorporeal blood circulation without visible scars, using a trocar set to insert multiple ducts through the tissue with minimal trauma and a fastening system to secure them in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single thick cannula is used for extracorporeal blood circulation, then the cannula can provide sufficient blood flow, but it causes tissue damage and requires incisions that result in visible scars
Solution Approach 1:
The patent divides a single thick cannula into multiple thin cannulas (typically 3-5 separate cannulas). Each thin cannula passes through separate transfixions in the tissue rather than requiring a single large incision. The multiple thin cannulas collectively provide the necessary blood flow capacity while each individual cannula causes minimal tissue trauma that heals without visible scarring.
2Productivity
If a large caliber cannula is used, then extracorporeal blood circulation can be established, but it requires a large incision that leaves a visible scar
Solution Approach 1:
Instead of creating one large incision for a single large cannula, the patent creates multiple small puncture sites for separate thin cannulas. The cumulative cross-sectional area of multiple thin cannulas equals or exceeds that of a single large cannula, maintaining blood flow capability while reducing the visual impact on the patient's body.
3Object-affected harmful factors
If multiple thin cannulas are used to avoid scars, then tissue trauma is minimized, but the device complexity increases
Solution Approach 1:
The patent combines multiple separate thin cannulas into a single integrated assembly that can be inserted through the tissue simultaneously or in sequence. The cannulas are connected to a common hub or connector that interfaces with the extracorporeal circulation system, simplifying the overall insertion procedure and device management despite having multiple individual cannulas.
Data Source
AI summary
An invention for connecting an extracorporeal circulation apparatus 35 to the patients' circulatory system 26B for providing extracorporeal blood circulation through a plurality of transfixions 44 in a tissue 25 space apart by a distance, comprising: a holder 10; and the plurality of ducts 14 connected to said holder 10; wherein said holder 10 is adapted to connect to the extracorporeal circulation apparatus 35; wherein at least one of said plurality of ducts 14 is adapted to connect to the patients' circulatory system 26B; wherein said holder 10 and said plurality of ducts 14 includes blood passageways 3. The invention including an internal connection 33 including a proximal portion 33A and a distal portion 33B; wherein said distal portion 33B is adapted to connect to the patients' circulatory system 26B; wherein said proximal portion 33A is connectable to said ducts 14. The methods are provided.