Double-Layer Balloon Catheter for Uniform Heat Exchange
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Solution Overview
Problem
Existing balloon catheters suffer from incomplete heat exchange due to non-uniform flow rate distribution and insufficient contact of the heat exchange medium with the inner surface of the balloon, leading to inadequate therapeutic effects.
Innovation Solution
A balloon catheter design featuring a double-layer balloon structure with a medium channel between the inner and outer balloons, separate inlet and backflow holes, and a control valve to regulate medium flow, ensuring uniform distribution and enhanced heat exchange efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-layer balloon structure is used, then the device complexity is low, but the heat exchange efficiency is insufficient due to non-uniform flow rate distribution and insufficient medium contact with the balloon inner surface
Solution Approach 1:
The balloon body is divided into an inner layer balloon and an outer layer balloon, creating a double-layer structure. This segmentation allows the medium to flow through a medium channel between the two layers, increasing the contact area and improving heat exchange efficiency while maintaining manageable device complexity through modular design
Solution Approach 2:
The inner layer balloon is nested inside the outer layer balloon, forming a concentric double-layer structure. This nesting arrangement creates a medium channel between the layers through which the heat exchange medium flows, maximizing the contact area between the medium and balloon surface without significantly increasing overall device size
2Device complexity
If the medium flows through a single inlet hole, then the device complexity is low, but the flow rate distribution is non-uniform resulting in incomplete heat exchange
Solution Approach 1:
The inlet configuration is segmented into multiple inlet holes (first inlet hole and second inlet hole) positioned at different locations. This segmentation ensures uniform flow rate distribution across the balloon surface by dividing the medium flow into multiple streams, thereby achieving complete heat exchange without significantly increasing device complexity
Solution Approach 2:
Different inlet holes are positioned at specific locations on the catheter to optimize flow distribution. The first inlet hole is positioned to supply medium to the inner layer balloon while the second inlet hole supplies medium to the outer layer balloon, creating localized flow patterns that ensure uniform distribution and complete heat exchange across the entire balloon surface
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 double-layer balloon design facilitates more uniform medium flow and increased heat exchange efficiency by allowing the medium to circulate through both layers, improving therapeutic outcomes.
Implementation Method 1
a medium channel is formed between the inner layer balloon and the outer layer balloon... the medium flows into the medium channel through the outer layer medium inlet hole, and then the medium in the medium channel flows out through the medium backflow hole to implement circulation... more medium can exchange heat on the inner surface of the outer layer balloon
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A balloon catheter includes a catheter (1) and a balloon body (2) sleeved on the catheter (1). The balloon body (2) includes an inner layer balloon (21) and an outer layer balloon (22). The inner layer balloon (21) and the outer layer balloon (22) are both directly wrapped and fixed on the catheter (1). The inner layer balloon (21) is located inside the outer layer balloon (22). A medium channel (23) is formed between the inner layer balloon (21) and the outer layer balloon (22). An outer layer medium inlet hole (11) and a medium backflow hole (12) both in communication with the medium channel (23) are provided in the catheter (1). In the balloon catheter, the double-layer balloon body (2) is provided, so that a medium can flow in the medium channel (23) between the inner layer balloon (21) and the outer layer balloon (22), the medium flows into the medium channel (23) through the outer layer medium inlet hole (11), and then the medium in the medium channel (23) flows out through the medium backflow hole (12) to implement circulation. In this way, more medium can exchange heat on the inner surface of the outer layer balloon (22) and the flow rate distribution is relatively uniform, to increase the flowing quality of the medium on the surface of the balloon body, thereby improving the heat exchange efficiency.