Non-Circumferential Wrist Compression for Radial Artery Patency
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Solution Overview
Problem
Existing circumferential tissue compression devices apply pressure to the entire wrist, which can lead to undesirable radial artery occlusion and reduced blood flow, making transradial access procedures difficult and prolonged.
Innovation Solution
A non-circumferential tissue compression device that selectively applies pressure to either the ulnar or radial region of the wrist using a base and an expandable member, allowing for targeted compression to facilitate transradial access and reduce occlusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a compression device is inserted through a puncture site in the pericardium, then pericardial effusion can be compressed, but the puncture site creates a risk of infection and requires suturing
Solution Approach 1:
The compression device is nested within a delivery catheter during insertion, allowing the entire device to be introduced through a small puncture site without requiring separate components or complex assembly procedures that would increase infection risk
2Ease of operation
If a large-bore catheter is used to insert the compression device, then the device can be delivered, but it causes significant trauma to the patient
Solution Approach 1:
The compression device is divided into multiple compression elements that can be delivered through a smaller catheter, reducing patient trauma while maintaining the therapeutic compression function
Solution Approach 2:
The compression device is nested within a delivery catheter, allowing introduction through a smaller bore than would be required if the device were delivered independently, thereby reducing patient trauma
3Ease of operation
If the pericardial space is allowed to refill after drainage, then cardiac compression is relieved, but fluid re-accumulation occurs
Solution Approach 1:
The compression device maintains continuous compression force on the heart even as the pericardial space refills with fluid, preventing fluid re-accumulation from causing harmful compression while allowing normal cardiac motion
Solution Approach 2:
The device changes the physical parameters of the pericardial space by maintaining controlled compression pressure, allowing the space to refill without creating harmful compression forces on the heart
4Strength
If a Dacron graft is used to reinforce the puncture site, then structural integrity is improved, but the procedure becomes more complex and time-consuming
Solution Approach 1:
The puncture site reinforces itself through the compression device's anchoring mechanism, where the device's expansion or anchoring elements provide structural reinforcement without requiring separate graft materials or additional suturing steps
Data Source
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AI summary
Application of pressure at an ulnar region or a radial region may be used to facilitate transradial access procedures, reduce occlusion of the radial artery, or both. A non-circumferential tissue compression device includes a base configured to, when on a wrist of a patient, surround at least a portion of the wrist in a non-circumferential configuration, and an expandable member coupled to the base. The non-circumferential configuration is shaped to allow a clinician to fit the tissue compression device onto the wrist, orient the tissue compression device to engage the wrist, and to enable the expandable member to be inflated without becoming disengaged with the wrist. The expandable member is configured to be positioned over, and apply pressure to, an ulnar region, a radial region, or both before, during, and/or after a transradial access procedure.