Inflatable Radial Artery Compression Device with Segmented Chambers
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Solution Overview
Problem
Achieving hemostasis at radial artery access sites during and after medical procedures is challenging due to the difficulty in applying effective pressure to prevent bleeding while ensuring blood flow is not restricted.
Innovation Solution
A radial artery compression device with an inflatable chamber, a substantially rigid frame, and a wristband that positions the inflatable chamber adjacent to the radial artery, using alignment indicia to ensure pressure is applied directly to the arteriotomy site, and a valve system to maintain pressure, along with optional features like a pressure sensor and timer for controlled deflation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual compression is used to achieve hemostasis, then bleeding can be stopped, but it is difficult to apply effective pressure without restricting blood flow
Solution Approach 1:
The compression device is segmented into multiple independent inflatable chambers, each targeting specific anatomical locations (arteriotomy site, puncture site, proximal and distal segments). This segmentation allows independent pressure application to different sites, enabling effective hemostasis while monitoring and controlling overall blood flow restriction through selective inflation of individual chambers.
Solution Approach 2:
Each inflatable chamber is designed with specific local properties - different positions, sizes, and inflation pressures tailored to the anatomical requirements of each compression site. The targeting indicia on each chamber provide local quality control by ensuring precise positioning over the intended arteriotomy or puncture site, maximizing compression effectiveness while minimizing unnecessary blood flow restriction.
2Reliability
If compression pressure is increased to ensure hemostasis, then bleeding stops more effectively, but the risk of excessive force and tissue damage increases
Solution Approach 1:
The compression system is dynamic rather than static, allowing real-time adjustment of inflation pressures in each chamber based on bleeding control requirements. The multi-chamber design enables progressive compression where pressures can be incrementally increased in individual chambers until hemostasis is achieved, then maintained at the minimum effective pressure to avoid tissue damage.
Solution Approach 2:
The system incorporates feedback mechanisms through targeting indicia that allow visual confirmation of proper chamber positioning and inflation. The independent chamber design provides feedback on which specific site requires compression, enabling targeted pressure application and adjustment to achieve hemostasis with minimal force, thereby preventing tissue damage from excessive compression.
3Device complexity
If a single compression device is used, then the device structure is simple, but it cannot provide targeted pressure to different sites simultaneously
Solution Approach 1:
The single compression device is segmented into multiple inflatable chambers within one integrated structure. This segmentation allows the device to provide targeted pressure to different sites (arteriotomy site, puncture site, proximal and distal segments) simultaneously while maintaining a relatively simple overall device structure with a single frame and wristband.
Solution Approach 2:
Multiple compression chambers are merged into a single integrated device structure with one frame and wristband. This combining approach provides targeted pressure application capability across multiple sites while avoiding the complexity of multiple separate devices, achieving versatility without proportionate increases in structural complexity.
4Measurement precision
If alignment indicia are added to ensure proper positioning, then pressure is applied directly to the arteriotomy site, but the device complexity increases
Solution Approach 1:
Targeting indicia are incorporated into the inflatable chambers and frame, using visual indicators (such as colored markings or transparent/ translucent materials) to show proper positioning. These indicia provide measurement precision for aligning the compression chamber with the arteriotomy site without adding significant structural complexity, as they are integrated into the existing device components.
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
Facilitates rapid and effective hemostasis by applying targeted pressure to the arteriotomy site, minimizing bleeding while maintaining patency of the radial artery, and allows for controlled deflation to avoid excessive force, promoting healing.
Implementation Method 1
The inflated balloon applies pressure to the puncture site
Data Source
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AI summary
Radial artery compression devices with an inflatable chamber and a substantially rigid frame are disclosed. The inflatable chamber of the radial artery compression devices can be inflated and then deflated according to a predetermined protocol. Some substantially rigid frames can form a wall of the inflatable chamber. Some substantially rigid frames can include indicia to facilitate positioning of the inflatable chamber relative to a puncture site of a patient.