Compression Patch Alignment Around Medical Insertion Sites

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Solution Overview

Problem

Existing compression devices struggle with efficiently aligning a bladder to a predetermined compression position on a biological surface, leading to inefficiencies in wound compression after medical procedures.

Innovation Solution

A compression device with an adhesive sheet and compression member featuring a receiving portion and identification markers that facilitate easy positioning on a biological surface, allowing for precise alignment of the device over wounds or insertion sites.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a flexible web with adhesive layer is used to hold the bladder against the skin, then the bladder can be secured to the biological surface, but the efficiency of aligning the bladder to the predetermined compression position is insufficient

Engineering Contradiction:
Improvebladder securingVSAvoidalignment efficiency
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The patent applies visual markers or color-coded indicators on the flexible web and bladder assembly to guide proper positioning. These visual cues enable healthcare providers to quickly and accurately align the bladder with the compression position on the biological surface, eliminating the need for complex alignment procedures while maintaining secure attachment.

Inventive Principle:
Principle #32Color changes

2Force

If the bladder is inflated to compress the wound, then hemostasis is achieved, but the positioning accuracy of the compression device is compromised without alignment markers

Engineering Contradiction:
Improvecompression forceVSAvoidpositioning accuracy
Core Design Contradiction:
ForceVSManufacturing precision

Solution Approach 1:

The patent introduces alignment markers as an intermediary element between the bladder and the biological surface. These markers serve as a reference system that guides the positioning of the compression device before inflation, ensuring that the compression force is applied at the correct location. The markers act as a mediator that translates the intended compression position into accurate physical placement of the bladder.

Inventive Principle:
Principle #24Intermediary (Mediator)

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

Enables easy and accurate placement of the device at the appropriate position, ensuring effective wound compression and hemostasis, even when medical insertion members extend outside the body.

Implementation Method 1

one surface of the flexible web is provided with an adhesive layer that adheres to the skin of the patient

Methodology Applied
Scientific EffectAdhesion: Adhesive

Implementation Method 2

an inflatable bladder having a deflated state in which a membrane is adjacent to an end wall and an inflated state in which the membrane is spaced from the end wall

Methodology Applied
Scientific EffectInflation: Pressure Increase

Data Source

PatentEP4111986B1Compression device
Publication Date: 2026.04.15 TERUMO KK
  • EP4111986B1 patent drawingFigure 1
  • EP4111986B1 patent drawingFigure 2
  • EP4111986B1 patent drawingFigure 3

AI summary

A compression device according to this disclosure includes: an adhesive sheet having an adhesion surface; and a compression member configured to compress a biological surface. The compression member includes: a pressing body configured to press the biological surface by extending in a thickness direction of the adhesive sheet; and a holding body fixed to the adhesive sheet and configured to hold the pressing body to be extendable in the thickness direction. In a plan view seen in the thickness direction, a receiving portion, which is a region in which the adhesive sheet is not disposed or a region defined by a concave portion in an outer edge of the adhesive sheet and which is configured to receive a medical insertion member, is provided outside an outer edge of the holding body. The holding body includes, at a position adjacent to the receiving portion, an identification portion configured to be visually identified in the plan view seen in the thickness direction.