Radial Artery Compression Device with Fluid-Bladder Pressure Control
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Solution Overview
Problem
Current radial artery compression devices are inefficient in achieving hemostasis quickly and consistently, often requiring prolonged manual compression and leading to increased patient discomfort and potential re-bleeding, with existing automated solutions being costly, difficult to maintain, and impractical for sterile use.
Innovation Solution
A self-contained radial artery compression device with a fluid-filled pressure bladder and adjustable pressure control, secured to the patient's wrist using a strap, which applies continuous and adjustable compression through a pump and pressure control mechanism, optionally combined with a brace for immobilizing the wrist and a hemostatic compression pad.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual compression is used to achieve hemostasis, then hemostasis can be achieved, but prolonged compression is required leading to increased patient discomfort and healthcare resource utilization
Solution Approach 1:
The device uses a balloon catheter that is inflated with fluid (typically contrast medium or saline) to apply controlled radial compression to the artery. This pneumatic/hydraulic approach replaces manual finger compression with a more reliable and adjustable mechanical system that can maintain consistent pressure without requiring prolonged manual intervention.
Solution Approach 2:
The compression pressure is made adjustable by controlling the inflation pressure of the balloon catheter. The operator can modify the degree of compression by adding or releasing fluid from the balloon, allowing optimization of compression levels based on patient response and bleeding control needs, thereby reducing unnecessary prolonged compression.
2Reliability
If higher compression pressure is applied to ensure hemostasis, then bleeding control is improved, but patient discomfort and risk of tissue damage increase
Solution Approach 1:
The device allows dynamic adjustment of compression pressure by modifying the balloon inflation volume. The operator can start with lower pressures and gradually increase as needed, or decrease pressure once hemostasis is achieved, thereby minimizing patient discomfort and tissue damage risk while maintaining effective bleeding control.
Solution Approach 2:
The operator can monitor the patient's response to compression (bleeding control, discomfort levels, neurological status) and adjust the balloon pressure accordingly. This feedback mechanism allows optimization of compression levels to achieve the minimum necessary pressure for hemostasis, avoiding excessive compression that would cause harm.
3Reliability
If adjustable compression pressure is implemented, then optimal hemostasis can be achieved, but device complexity increases
Solution Approach 1:
The pressure adjustment mechanism uses simple fluid dynamics principles - adding fluid to the balloon increases pressure, removing fluid decreases pressure. This avoids complex mechanical or electronic pressure control systems while achieving the desired adjustable compression capability.
Solution Approach 2:
The same balloon catheter structure serves multiple functions: it provides arterial access for the procedure, delivers contrast medium for imaging, and applies compression for hemostasis. This multi-functionality reduces overall device complexity compared to having separate access and compression systems.
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 device achieves hemostasis in 10-15 minutes or less with a complication rate of less than 1%, significantly reducing patient discomfort and healthcare resource utilization compared to existing methods.
Implementation Method 1
a pump in direct fluid connection with said pressure bladder to pressurize said pressure bladder
Implementation Method 2
a pressure control mechanism in direct fluid connection with said pressure bladder to control the pressure within said pressure bladder
Data Source
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AI summary
A vascular compression apparatus and method for applying pressure onto an area of a patient generally including a blood vessel and a wound site, such as a blood vessel puncture after a cannulated procedure, for the purpose of controlling bleeding and achieving hemostasis.