Narrow Profile Balloon for Aortic Occlusion
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Solution Overview
Problem
Conventional aortic balloon occlusion devices lack precise placement and control over pressure application, leading to inadequate control over reperfusion and potential aortic rupture due to their all-or-nothing approach and inability to maintain renal and distal perfusion during intra-abdominal bleeding.
Innovation Solution
A narrow profile balloon with an anchored and movable end, an inflatable tube, and a tension wire system allows for precise placement and controlled pressure application within the aorta, enabling selective occlusion and reperfusion by adjusting the position and inflation of multiple balloons along the catheter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional aortic balloon occlusion devices are used, then occlusion of blood flow is achieved, but precise placement and control over pressure application are lost
Solution Approach 1:
The balloon is divided into multiple independent segments that can be inflated or deflated separately. Each segment can be controlled independently to achieve precise placement and selective occlusion of specific vascular regions, allowing for accurate positioning without requiring a completely complex device structure.
Solution Approach 2:
The balloon incorporates a tension wire system that allows dynamic adjustment of the balloon's shape and position. By tensioning or releasing the wire, the balloon can be actively repositioned and reshaped during the procedure to achieve precise placement and optimize pressure distribution on the aortic wall.
2Ease of operation
If conventional aortic balloon occlusion devices are used, then occlusion of blood flow is achieved, but control over reperfusion is poor
Solution Approach 1:
The segmented balloon design enables selective deflation of individual segments to control reperfusion in a stepwise manner. This allows operators to gradually restore blood flow to specific vascular territories while maintaining occlusion in other areas, providing reliable and controlled reperfusion management.
Solution Approach 2:
The device allows for partial occlusion by inflating only certain segments of the balloon rather than requiring complete inflation. This enables fine-tuned control over the degree of occlusion and reperfusion, allowing operators to achieve the minimal necessary occlusion while maintaining adequate blood flow to critical organs.
3Reliability
If conventional aortic balloon occlusion devices are used, then occlusion of intra-abdominal bleeding is achieved, but ability to maintain renal and distal perfusion is lost
Solution Approach 1:
The balloon is divided into segments corresponding to different vascular territories, including segments that control flow to renal arteries and distal aorta. By selectively inflating only the segment needed for occlusion while leaving other segments deflated, the device maintains perfusion to renal and distal regions while effectively stopping intra-abdominal bleeding.
Solution Approach 2:
The device applies occlusion locally to specific vascular regions rather than providing global occlusion. The segmented design allows the operator to target the specific segment causing bleeding while preserving blood flow through other segments to vital organs such as kidneys and distal tissues.
4Measurement precision
If conventional aortic balloon occlusion devices are used, then occlusion is achieved, but precise pressure estimation is difficult leading to potential aortic rupture
Solution Approach 1:
The tension wire system provides dynamic control over balloon inflation and shape. By gradually tensioning the wire and monitoring balloon expansion, operators can precisely control the pressure applied to the aortic wall, preventing excessive pressure that could lead to rupture while ensuring adequate occlusion.
Solution Approach 2:
The device allows for gradual, incremental inflation of balloon segments rather than sudden complete inflation. This controlled approach enables precise pressure estimation by observing balloon expansion in stages, allowing operators to stop inflation at the point of adequate occlusion without exceeding safe pressure limits.
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
Enables precise placement and controlled occlusion of blood flow, preventing aortic rupture and allowing for gradual reperfusion, thereby improving the management of intra-abdominal bleeding and maintaining renal and distal perfusion.
Implementation Method 1
selectively inflating the inflatable tube of the narrow profile balloon
Implementation Method 2
placing tension on the at least one tension wire attached to the movable end of the narrow profile balloon to move the movable end towards the anchored end
Data Source
AI summary
An aortic occlusion device includes a catheter and a balloon mounted along the catheter, wherein the balloon is a narrow profile balloon. The narrow profile balloon comprises an anchored end fixed to the catheter, a movable end distal to the fixed end, a wall extending between the anchored end and the movable end, an inflatable tube located proximate along the wall and circumscribing the wall, and at least one tension wire attached to the movable end and extending through the catheter such that the at least one tension wire is accessible to move the movable end of the balloon towards the anchored end when the catheter is positioned in the aorta.