Hemostasis Tool Using Differential Thermal Field for Radial Artery

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Solution Overview

Problem

Current methods for promoting hemostasis at puncture sites are inefficient due to the need for prolonged patient immobility and limited control over hemostasis time, as they rely on compression which can cause discomfort and pain.

Innovation Solution

A hemostasis promoting method and tool that utilize temperature adjustments by applying heat to one blood vessel and cooling to another to increase blood flow and coagulation factor concentration, thereby accelerating hemostasis without the need for excessive compression.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If compression force is applied to the puncture site for hemostasis, then hemostasis can be achieved, but the patient's movement is limited and the time required for hemostasis is prolonged

Engineering Contradiction:

Improvehemostasis effectivenessVSAvoidhemostasis time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The invention changes the temperature parameter of the blood vessel by applying heat to increase blood flow velocity and promote coagulation factor concentration, thereby accelerating hemostasis without requiring prolonged compression

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention replaces the mechanical compression method with a thermal field approach, using heat application to modify blood flow characteristics and promote natural coagulation processes, thus eliminating the need for prolonged mechanical compression

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If compression force is applied to the puncture site for hemostasis, then hemostasis can be achieved, but patient discomfort and pain increase

Engineering Contradiction:

Improvehemostasis effectivenessVSAvoidpatient discomfort

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The invention replaces the mechanical compression system with a thermal field system, using heat application to promote hemostasis through physiological mechanisms rather than mechanical pressure, thereby eliminating patient discomfort associated with compression

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention changes the temperature parameter of the blood vessel to promote natural coagulation processes, providing a comfortable alternative to mechanical compression that causes pain and discomfort

Inventive Principle:

Principle #35Parameter changes

3Loss of time

If heat is applied to increase blood flow and coagulation factors, then hemostasis time is reduced, but energy consumption increases

Engineering Contradiction:

Improvehemostasis timeVSAvoidenergy consumption

Core Design Contradiction:

Loss of timeVSUse of energy by moving object

Solution Approach 1:

The invention applies heat locally and temporarily only to the puncture site area rather than continuously or extensively, using partial action to achieve the hemostasis effect with minimal energy consumption

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The invention temporarily changes the temperature parameter during the hemostasis process to accelerate coagulation, then returns to normal conditions, using controlled parameter changes to minimize energy consumption while achieving rapid 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

This approach reduces hemostasis time, minimizes patient discomfort, and allows for more efficient blood coagulation by selectively increasing blood flow and coagulation factors in the treated vessel, thus promoting faster and more effective hemostasis.

Implementation Method 1

applying heat to the body surface of the limb around the first blood vessel and/or a peripheral blood vessel of the first blood vessel to increase a temperature of the body surface around the first blood vessel

Methodology Applied

Scientific EffectHeating: Heating

Implementation Method 2

applying cooling to the body surface of the limb around the second blood vessel and/or a peripheral blood vessel of the second blood vessel to decrease a temperature of the body surface around the second blood vessel

Methodology Applied

Scientific EffectCooling: Cooling

Data Source

PatentUS20210128170A1Hemostasis promoting method and hemostasis assisting tool

Publication Date: 2021.05.06 TERUMO KK

AI summary

A hemostasis promoting method and a hemostasis assisting tool are capable of promoting hemostasis on a puncture site. The hemostasis promoting method is a method of promoting hemostasis on a puncture site formed in a radial artery among the radial artery and an ulnar artery that are branched from a brachial artery in an arm and that extend parallel to each other. The hemostasis promoting method makes a temperature of a body surface around the radial artery higher than a temperature of a body surface around the ulnar artery such that the temperature of the radial artery will be higher than the temperature of the ulnar artery.