Pneumatic Compression Device for Chemotherapy Scalp Protection

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Solution Overview

Problem

Current chemotherapy-induced side effects such as alopecia, peripheral neuropathy, and infertility remain unaddressed due to discomfort, inefficiency, and high costs of existing treatments, with a lack of effective solutions for minimizing treatment time and preventing drug delivery to healthy tissues.

Innovation Solution

A pneumatic pressure device applies localized vascular compression to reduce drug delivery to target tissues by inflating bladders with air or gas to exert compressive pressure between 20 mmHg to 200 mmHg, reducing blood perfusion and preventing chemotherapy-induced damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If cold caps or scalp cooling devices are used to prevent chemotherapy-induced alopecia, then hair loss is reduced, but patient comfort deteriorates due to discomfort and headaches

Engineering Contradiction:

Improveeffectiveness in preventing hair lossVSAvoidpatient discomfort and headaches

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the thermal field (cooling) with a mechanical field (compression). Instead of using cold caps that cool the scalp to prevent chemotherapy-induced alopecia, the invention uses a compression device that applies mechanical pressure to the scalp to achieve the same protective effect against hair loss while avoiding the discomfort and headaches caused by cooling.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the physical parameter from temperature (cooling) to pressure (compression). The compression device applies controlled mechanical pressure to the scalp, transforming the approach from thermal-based protection to mechanical-based protection, thereby eliminating the side effects associated with cooling while maintaining effectiveness in preventing chemotherapy-induced alopecia.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If tourniquet systems are used to apply pressure to the scalp, then drug delivery is reduced, but treatment complexity increases and patient comfort worsens

Engineering Contradiction:

Improvereduction in drug delivery to healthy tissuesVSAvoidsystem complexity and treatment time

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent divides the compression system into multiple independent inflatable bladders positioned at different locations on the scalp. Each bladder can be independently controlled and inflated to specific pressure levels, allowing for segmented compression that reduces drug delivery to healthy tissues while maintaining simplicity in operation and reducing overall treatment complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent uses inflatable bladders filled with gas or fluid to apply controlled compression to the scalp. This pneumatic/hydraulic system allows for precise control of compression pressure and duration, effectively reducing drug delivery to healthy tissues while maintaining device simplicity and ease of operation, unlike complex mechanical tourniquet systems.

Inventive Principle:

Principle #29Pneumatics and hydraulics

3Reliability

If compression pressure is increased to reduce drug delivery, then protection against chemotherapy damage improves, but risk of reperfusion injury increases

Engineering Contradiction:

Improveprotection against chemotherapy-induced damageVSAvoidreperfusion injury risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent employs dynamically adjustable compression pressure through controllable inflatable bladders. The compression pressure can be adjusted in real-time based on patient response and treatment requirements, allowing for optimized protection against chemotherapy-induced damage while minimizing the risk of reperfusion injury by avoiding excessive or prolonged compression.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent implements periodic or intermittent compression through controlled inflation and deflation cycles of the bladders. This periodic action allows blood flow to be temporarily restricted during chemotherapy administration to prevent drug delivery to healthy tissues, then restored between cycles to minimize the risk of reperfusion injury, balancing protection with safety.

Inventive Principle:

Principle #19Periodic action

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 device effectively minimizes chemotherapy-induced side effects by reducing drug delivery to healthy tissues, enhancing patient comfort, and reducing treatment time, while avoiding reperfusion injury and infection risks.

Implementation Method 1

Methodology Applied

Scientific EffectVascular compression: Compression

Data Source

PatentUS20230390145A1Compression device

Publication Date: 2023.12.07 NATIONAL UNIVERSITY OF IRELAND

AI summary

A medical device comprising a bladder (or plurality of bladders), an attachment mechanism, a fluid inlet, a fluid outlet, a compressor, a pressure regulator system, and a perfusion sensor, which is compressed against intact tissue (unbroken skin or surface tissue in a cavity) for the purpose of minimising blood perfusion to prevent drug delivery to a non-target site.