Radial Artery Compression Device with Adjustable Knob Mechanism
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Solution Overview
Problem
Existing radial artery compression devices are not adapted to provide adjustable and consistent compression to the radial artery access site during and after vascular procedures, leading to challenges in achieving hemostasis and requiring manual continuous pressure application by practitioners, which is costly and impractical.
Innovation Solution
A radial artery compression device that can be securely strapped to the wrist, featuring a rotating knob mechanism that adjusts a threaded shaft to extend or retract a compression pad, allowing for adjustable compression pressure to be applied to the radial artery access site, enabling hemostasis during and after procedures without continuous manual pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual compression is applied by a practitioner to achieve hemostasis, then hemostasis can be achieved at the access site, but practitioner time is consumed and costs increase
Solution Approach 1:
The compression device is designed to self-regulate and maintain compression pressure without requiring continuous practitioner intervention. The device includes a compression member that applies pressure to the radial artery, a pressure sensor that monitors compression pressure, and a controller that automatically adjusts the compression member based on feedback from the pressure sensor, enabling the system to maintain hemostasis autonomously
Solution Approach 2:
The device incorporates a pressure sensor that continuously monitors the compression pressure applied to the radial artery and provides feedback to a controller. The controller uses this feedback information to automatically adjust the compression member, ensuring optimal compression pressure is maintained for hemostasis without requiring manual intervention
2Reliability
If continuous compression pressure is applied to achieve hemostasis, then bleeding stops, but patient comfort decreases and tissue damage may occur
Solution Approach 1:
The compression device dynamically adjusts the compression pressure applied to the radial artery based on real-time feedback from the pressure sensor. The controller modulates the compression member to maintain pressure within a therapeutic range, increasing pressure when bleeding is detected and decreasing it when hemostasis is achieved, thereby preventing tissue damage and improving patient comfort
Solution Approach 2:
The device automatically changes the compression pressure parameter based on feedback from the pressure sensor and pre-programmed protocols. The system transitions between different pressure levels (high pressure for initial hemostasis, lower pressure for maintenance) without manual intervention, optimizing both hemostasis achievement and patient comfort
3Ease of operation
If tape or compression bandage is used to apply pressure, then practitioner attention is freed, but adjustment of compression pressure becomes difficult
Solution Approach 1:
The device replaces manual mechanical compression (tape or bandage) with an automated mechanical system consisting of an actuator, compression member, and control system. The actuator is controlled by a microprocessor-based controller that receives input from a pressure sensor and automatically adjusts compression pressure, eliminating the need for manual adjustment while providing precise control
4Reliability
If high compression pressure is applied initially to stop bleeding, then hemostasis is achieved quickly, but patient discomfort increases
Solution Approach 1:
The compression device implements periodic action by applying high compression pressure in controlled intervals initially to achieve rapid hemostasis, then transitioning to lower maintenance pressure. The controller monitors pressure sensor feedback and adjusts the compression member accordingly, providing brief periods of high pressure followed by lower pressure periods, thereby achieving quick hemostasis while minimizing patient discomfort
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 provides consistent and adjustable compression to facilitate hemostasis at the radial artery access site, reducing blood loss, allowing for quicker patient recovery, and enabling practitioners to attend to other tasks without constant manual pressure application.
Implementation Method 1
a threaded shaft coupled to the compression pad such that rotation of the threaded shaft causes the compression pad to be extended or retracted
Data Source
AI summary
A radial artery compression device configured to be releasably secured by a strap or band to the underside of a wrist of a patient and to provide adjustable and consistent compression pressure in the area of a radial artery access site to achieve hemostasis either during or after a medical procedure such as a percutaneous coronary procedure. The radial artery compression device includes a body configured to engage and secure a knob while allowing the knob to rotate with respect to the body. Rotation of the knob can cause a threaded shaft to move. The threaded shaft mechanically couples the knob to a disk-shaped compression pad. The compression pad can include one or more notches adapted to at least partially surround a sheath and/or a catheter inserted into the radial artery at the access site. The compression pad can also include a step on the surface to provide a desired amount of contour to a portion of a device within the radial artery during a procedure.