Hemostasis Tool Balloon Pressure Detection via Optical Indicators

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Solution Overview

Problem

Existing hemostasis tools face challenges in determining the appropriate pressing force for effective hemostasis, as insufficient force can lead to inadequate hemostasis, while excessive force may cause discomfort or injury, and incorporating a pressure gauge increases tool size and weight, making them cumbersome for users and patients.

Innovation Solution

A hemostasis tool with a flexible bandage body, a balloon that compresses the site by injecting fluid, and a detection unit that uses discoloration or deformation to indicate the pressing force, allowing for precise adjustment of the compression strength without increasing the tool's size or weight.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a pressure gauge is incorporated into the hemostasis tool to measure pressing force, then measurement precision is improved, but device complexity and weight increase

Engineering Contradiction:
Improvepressing force measurementVSAvoidtool structure
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical pressure gauge system with an optical detection system. The detection unit uses light transmission through a light-transmitting portion of the bandage body to detect pressing force strength levels, eliminating the need for mechanical pressure sensing components and their associated complexity.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The detection unit creates a visual copy or representation of the pressing force through optical signals. The light-transmitting portion acts as an optical indicator that visually represents the magnitude of pressing force applied by the balloon, allowing users to assess hemostasis effectiveness without direct mechanical measurement.

Inventive Principle:
Principle #26Copying

2Measurement precision

If a pressure gauge is incorporated into the hemostasis tool to measure pressing force, then measurement precision is improved, but weight increases

Engineering Contradiction:
Improvepressing force measurementVSAvoidtool weight
Core Design Contradiction:
Measurement precisionVSWeight of moving object

Solution Approach 1:

The patent replaces heavy mechanical pressure gauge components with a lightweight optical detection system. The detection unit and light-transmitting portion use optical materials and structures that are significantly lighter than traditional mechanical pressure sensing mechanisms, reducing overall tool weight.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The light-transmitting portion functions as a thin, flexible optical film that allows light transmission while maintaining the structural integrity of the bandage body. This thin-film approach minimizes added weight compared to rigid mechanical pressure gauge components.

Inventive Principle:
Principle #30Flexible shells and thin films

3Reliability

If the balloon pressing force is increased to ensure adequate hemostasis, then reliability is improved, but object-affected harmful factors increase

Engineering Contradiction:
Improvehemostasis effectivenessVSAvoidexcessive compression
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The detection unit provides real-time feedback on the pressing force strength level to the user through visual indication via the light-transmitting portion. This feedback mechanism allows users to monitor and adjust the balloon inflation to maintain optimal pressing force, preventing both insufficient hemostasis and excessive compression that could cause harm.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system enables dynamic adjustment of the pressing force parameter based on detected strength levels. Users can modify the balloon inflation volume to change the pressing force, with the detection unit guiding them to the appropriate parameter range for effective yet safe hemostasis.

Inventive Principle:
Principle #35Parameter changes

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 tool effectively compresses the hemostasis site with a suitable pressing force, ensuring adequate hemostasis without excessive pressure, thereby improving user experience and patient comfort while maintaining a compact and lightweight design.

Implementation Method 1

a detection unit that detects a strength level of a pressing force of the balloon pressing the site requiring hemostasis, based on discoloration or deformation

Methodology Applied
Scientific EffectDiscoloration: Photochromism

Implementation Method 2

The bandage body has a light-transmitting portion having light transmittance. The detection unit is located between the balloon and the light-transmitting portion, and is visible via the light-transmitting portion.

Methodology Applied
Scientific EffectLight transmission: Light

Implementation Method 3

the detection unit has a deformation portion which is deformed in response to the strength of the pressing force, and which detects the strength level of the pressing force, based on a deformation amount thereof

Methodology Applied
Scientific EffectDeformation: Deformation

Data Source

PatentUS10792048B2Hemostasis tool
Publication Date: 2020.10.06 TERUMO KK
  • US10792048B2 patent drawing
  • US10792048B2 patent drawing
  • US10792048B2 patent drawing

AI summary

A hemostasis tool has a flexible bandage body that is used by being wound around a puncture site, a balloon that is arranged in the bandage body, and that is dilated by injecting a fluid so as to compress the puncture site in a dilated state, and a detection unit that detects a strength level of a pressing force of the balloon pressing the puncture site, based on discoloration or deformation. In this manner, it is possible to detect the pressing force of the balloon pressing the puncture site. Accordingly, the balloon can properly compress the puncture site.