Integrated Double Cannula for ECMO with Partition Wall
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Solution Overview
Problem
Conventional ECMO cannulas are limited by the diameter and length of the jugular vein, resulting in restricted blood flow rates, inefficient oxygenation, and increased recirculation, which complicates surgical procedures and patient comfort, especially when jugular veins are difficult to access.
Innovation Solution
An integrated double cannula with a partition wall separating blood introduction and supply parts, featuring side holes and a flexible synthetic resin material, allowing for increased flow rates and longer lengths, and a protective flange to prevent contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional single cannula is used for ECMO, then the cannula diameter is limited by the jugular vein diameter, but the blood flow rate is markedly limited
Solution Approach 1:
The cannula is divided into multiple independent lumens (first lumen for blood introduction, second lumen for blood supply) separated by a partition wall. This segmentation allows each lumen to be optimized for its specific function while collectively achieving higher blood flow rates that overcome the limitations of a single conventional cannula.
Solution Approach 2:
The invention transitions from a single-dimension flow path to a multi-dimensional flow architecture by adding multiple lumens in different spatial directions within the same cannula structure. The partition wall creates separate flow paths that operate simultaneously, effectively increasing the total cross-sectional area for blood flow without increasing the external cannula diameter.
2Productivity
If two separate cannulas are used for draining and returning blood, then the blood flow rate can be increased, but the surgical procedure becomes more complex
Solution Approach 1:
The invention merges the functions of two separate cannulas (draining and returning blood) into a single integrated cannula structure. The first lumen handles blood drainage while the second lumen handles blood return, allowing both functions to be performed simultaneously through one insertion site, thereby reducing surgical procedure complexity while maintaining high blood flow rates.
Solution Approach 2:
The single cannula structure is designed to perform multiple functions: blood introduction, blood supply, and separation of flow paths. The partition wall enables the cannula to simultaneously serve as both a drainage and return device, eliminating the need for separate cannulas and simplifying the surgical procedure.
3Productivity
If the cannula length is increased to improve blood flow, then the cannula occupies more space and may cause patient discomfort
Solution Approach 1:
The cannula is segmented into multiple lumens with separate flow paths, allowing blood flow to be optimized within each lumen. This segmentation enables efficient blood flow through a more compact structure, reducing the overall space occupied and improving patient comfort while maintaining high blood flow rates.
Data Source
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AI summary
The present invention relates to an integrated double cannula for ECMO. The integrated double cannula is configured to be inserted into a blood vessel through skin for ECMO. The integrated double cannula includes a cannula body in which a blood introduction part and a blood supply part are integrally formed inside a single pipe with a partition wall being therebetween, wherein an end of the cannula body is opened through an end hole, another end of the cannula body is opened through an outlet and an inlet arranged side by side and connected respectively to the blood introduction part and the blood supply part, and one or more side holes and one or more discharge holes connected respectively to the blood introduction part and the blood supply part are formed in a lateral portion of the cannula body.