Mannan-Based Simulated Animal Organ for Surgical Training

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Solution Overview

Problem

Conventional simulated animal organs made of silicone resin or polyvinyl alcohol are expensive, difficult to reuse hygienically, and pose environmental hazards due to chemical constituents, while lacking the flexibility and incision feel of real organs, making them unsuitable for effective training.

Innovation Solution

A method involving shaping a gelatinized mixture of mannan, water, and electrolyte (sodium chloride) at low temperatures, followed by drying and heating to create a simulated organ with enhanced tensile strength and elasticity, mimicking the feel and properties of real organs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If silicone resin is used for simulated animal organ, then the material feels similar to real organ, but the price is too high and it is difficult to reuse hygienically

Engineering Contradiction:
Improvetraining effectivenessVSAvoidcost
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The patent uses starch as a biodegradable material that can be disposed of after single use, eliminating the need for expensive reusable materials like silicone resin. The simulated organ is designed to be used once and then discarded, solving both the cost issue and the hygiene reusability problem while maintaining training effectiveness.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent changes the material parameter from non-biodegradable silicone resin to biodegradable starch, and controls the degradation timing through environmental conditions (temperature, humidity). This allows the simulated organ to maintain its properties during use and then decompose naturally after disposal, resolving the contradiction between cost and training effectiveness.

Inventive Principle:
Principle #35Parameter changes

2Ease of manufacture

If polyvinyl alcohol is used for simulated animal organ, then the material is inexpensive, but it melts when cut with electric knife and does not feel like real organ

Engineering Contradiction:
ImprovecostVSAvoidtraining effectiveness
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The patent changes the material composition from polyvinyl alcohol to starch-based materials with specific gelatinization properties. By controlling the gelatinization temperature and adding electrolytes, the material achieves the desired melting behavior that mimics real organ tissue when cut with an electric knife, while maintaining low cost and high training effectiveness.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite material system using starch, electrolytes, and other additives to achieve the desired properties. The combination of these materials provides the right balance of cost-effectiveness, realistic feel, and appropriate response to electric knife cutting, resolving the contradiction between inexpensive materials and training effectiveness.

Inventive Principle:
Principle #40Composite materials

3Productivity

If conventional simulated organs are discarded after use, then training can continue, but the environment is harmed by chemical constituents

Engineering Contradiction:
Improvetraining continuityVSAvoidenvironmental pollution
Core Design Contradiction:
ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent employs a disposable simulated organ made from biodegradable starch materials. After single use in training, the simulated organ can be naturally decomposed without causing environmental pollution, unlike conventional chemical-based materials. This resolves the contradiction between maintaining training continuity and preventing environmental harm.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent converts the potential harm of disposal into a benefit by using biodegradable materials that naturally decompose. The decomposition process, which would normally be considered waste management, becomes an environmentally friendly solution that eliminates pollution while maintaining training productivity through easy replacement of used simulated organs.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

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 method produces a simulated animal organ that closely replicates the experience of training with real organs, is cost-effective, hygienic, and environmentally friendly, allowing for frequent replacement and effective surgical technique training.

Implementation Method 1

a shaping step of mixing a raw material containing mannan as a main component and water for gelatinization and shaping a gelatinized substance to obtain a shaped body

Methodology Applied
Scientific EffectGelatinization: Gel

Implementation Method 2

a low temperature step of keeping the shaped body in a low temperature environment lower than a normal temperature

Methodology Applied
Scientific EffectFreezing: Freezing

Implementation Method 3

a drying step of drying the shaped body

Methodology Applied
Scientific EffectDrying: Desiccation

Data Source

PatentUS11056021B2Method for producing simulated animal organ and simulated animal organ
Publication Date: 2021.07.06 KOTOBUKI MEDICAL INC
  • US11056021B2 patent drawing
  • US11056021B2 patent drawing
  • US11056021B2 patent drawing

AI summary

A method for producing a simulated animal organ includes: a shaping step of mixing a raw material containing mannan as a main component and water for gelatinization and shaping a gelatinized substance into a shape of an animal organ to obtain a shaped body; and a low temperature step of keeping the shaped body in a low temperature environment lower than a normal temperature. As a result, a simulated animal organ in a state extremely close to an actual animal organ is provided.