Multiple Vascular Penetration Closure with Nonoverlapping Occlusion Elements

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Solution Overview

Problem

Existing vascular closure devices interfere with each other and limit imaging visibility when closing multiple vascular wall penetrations, particularly in procedures requiring multiple access sheaths.

Innovation Solution

A method for forming and sealing multiple vascular wall penetrations using parallel tissue tracts with minimum spacing, deploying occlusion elements that do not overlap with adjacent sheaths, and confirming proper placement through imaging before sealing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple access sheaths are introduced through parallel tissue tracts to perform procedures requiring multiple catheters, then the ability to perform complex procedures is improved, but the closure devices interfere with each other and limit imaging visibility

Engineering Contradiction:

Improveability to perform complex proceduresVSAvoidimaging visibility

Core Design Contradiction:

Adaptability or versatilityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent applies preliminary action by establishing specific spacing relationships between tissue tracts before the procedure. The first tissue tract is formed at a first location and the second tissue tract is formed at a second location such that when closure devices are deployed, their occlusion elements do not overlap. This pre-planned spatial arrangement ensures imaging visibility is maintained while allowing multiple catheter access

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent resolves the imaging interference problem by transitioning from a two-dimensional view (single vessel cross-section) to a three-dimensional spatial arrangement. By positioning tissue tracts at different locations along the vessel with specific spacing, the occlusion elements are distributed in space rather than overlapping, allowing imaging systems to visualize each closure device separately

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If multiple access sheaths are introduced through parallel tissue tracts, then multiple catheters can be introduced, but the occlusion elements of closure devices overlap with each other

Engineering Contradiction:

Improvemultiple catheter accessVSAvoidocclusion element overlap

Core Design Contradiction:

Adaptability or versatilityVSShape

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent segments the vascular access into multiple separate tissue tracts with defined spatial separation. Each tract is positioned independently at specific locations along the vessel, creating distinct zones for each closure device. This segmentation prevents the occlusion elements from overlapping while maintaining multiple access points

Inventive Principle:

Principle #1Segmentation

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 effective sealing of multiple vascular wall penetrations without interference, ensuring proper placement and visibility during imaging.

Implementation Method 1

The radially expandable element is expanded to a width sufficient to inhibit blood flow through the vascular wall penetration into the tissue tract

Methodology Applied

Scientific EffectRadial expansion:

Implementation Method 2

Patients, however, have often been heparinized to limit the risk of thrombosis during the procedure, and clotting of the vascular wall penetration can often take an extended period

Methodology Applied

Scientific EffectClotting: Coagulation

Data Source

PatentUS12349885B2Apparatus and methods for accessing and closing multiple penetrations on a blood vessel

Publication Date: 2025.07.08 CARDIVA MEDICAL INC

AI summary

Multiple vascular wall penetrations are formed and sealed in a single blood vessel, typically a vein, for performing cardiac and other catheter-based procedures. Access sheaths are placed in two or more tissue tracts each having a vascular wall penetration at a distal end and into a lumen of the blood vessel. A catheter is advanced though each of the access sheaths to perform a therapeutic or diagnostic procedure. A vascular closure device is introduced through each access sheath, typically sequentially, and an occlusion element at a distal end of the device is deployed against an inner wall of the blood vessel in a manner so that the adjacent access sheath does not interfere or overlap with the deployed occlusion element. The vascular penetration at the distal end in that tissue tract may then be sealed prior to using another vascular closure device to seal a caudally adjacent vascular wall penetration.