Market Context — Why This Technology, Why Now

Healthcare systems worldwide face increasing pressure to deliver more efficient and evidence-based care amidst rising chronic disease burdens and an aging demographic. The demand for objective diagnostic and monitoring tools in rehabilitation is surging, driven by the need to optimize patient outcomes, reduce healthcare costs, and standardize treatment protocols. This technology directly addresses these trends by providing a quantitative measure for a previously subjective condition.

Key Competitive Advantages
01

Enables objective, high-resolution quantitative assessment of spasticity based on joint angular acceleration, clarifying rehabilitation effects.

02

Facilitates easy implementation with a simple configuration of a measurement device and calculation unit, requiring no extensive special equipment.

03

Maximizes rehabilitation effectiveness by enabling optimal, personalized rehabilitation plans and adjustments for each patient based on accurate spasticity evaluation.

Market Opportunity
$650M–$700M globally (AI est.)
The increasing number of post-stroke patients due to an aging population is expanding rehabilitation demand. Objective assessment tools are becoming essential for effective treatment.
Major hospital groups with rehabilitation departments Specialized neurological rehabilitation centers University medical centers and research hospitals
$500M–$550M globally (AI est.)
The promotion of integrated community care systems is increasing demand for rehabilitation in facilities and home settings. Simple, objective assessment systems are highly sought after.
Large-scale nursing home chains Home healthcare service providers Integrated community care system operators
$450M–$500M globally (AI est.)
There is high demand for objective efficacy measurement tools in the development of spasticity drugs and rehabilitation devices. This technology is also expected to be valuable in clinical trials.
Pharmaceutical companies developing spasticity treatments Medical device manufacturers for rehabilitation equipment Clinical research organizations (CROs) for trial support
IP Defensibility — Why Competitors Can't Replicate This
What This Patent Covers

This patent protects a system for quantitatively assessing spasticity severity by measuring joint angular acceleration during passive flexion-extension movements, specifically calculating spasticity onset angle based on angular acceleration during extension. The claims are robust, having successfully overcome a rejection, indicating clear novelty and inventiveness against prior art.

Competitive White Space

While this patent covers objective spasticity assessment via angular acceleration, adjacent white space exists in integrating AI-driven predictive analytics for long-term patient outcomes or developing haptic feedback systems for real-time rehabilitation guidance, which are not explicitly claimed.

Economic Impact
~$200K/year estimated healthcare resource efficiency per facility (est.)
estimated ROI · USD · AI analysis
ROI Calculation Logic

Implementing this technology could reduce the time and human costs associated with spasticity assessment in rehabilitation facilities by an estimated 20% annually. For example, assuming the elimination of 3 medical professionals dedicated to assessment, annual direct cost savings of ~$100K (AI est.) could be realized (based on ~$35K/person/year, AI est.). Furthermore, improved rehabilitation outcomes, leading to shorter hospital stays and reduced recurrence rates, could provide an additional ~$100K (AI est.) in indirect healthcare resource efficiency, totaling an estimated ~$200K (AI est.) in annual economic benefits.

Speed to Market
6× faster than in-house development
This technology is already established by Akita University, with the basic measurement principles and calculation algorithms detailed in the patent specification. It can be integrated with existing general-purpose angle measurement sensors, reducing the burden of new hardware development and allowing focus on software implementation for rapid commercialization. Compared to developing similar technology from scratch, this approach could significantly shorten the development period, reducing time-to-market by approximately 2.5 years.
Competitive Positioning

X: Objectivity & Quantifiability of Assessment
Y: Ease of Implementation & Cost Efficiency

Business Models & Applications
🏥 System Implementation & Licensing
License this technology as a spasticity severity assessment support system to medical institutions and rehabilitation facilities, generating revenue from implementation fees and usage charges.
📊 Data Analysis Services
Collect and analyze spasticity assessment data obtained through this technology to offer consulting services for predicting patient condition changes and optimizing rehabilitation programs.
🧪 Drug & Device Development Support
Provide this technology to pharmaceutical companies and medical device manufacturers as an objective evaluation tool for clinical trials of spasticity treatments and rehabilitation devices.
Adjacent Application Opportunities
🏃 Sports & Exercise Science
Athlete Performance Evaluation System
This technology could be adapted to detect subtle abnormalities or fatigue accumulation in athletes' joint movements using angular acceleration data, enabling risk assessment for injuries and optimization of training efficacy. It could quantify performance metrics for specific movements, enhancing coaching strategies.
🤖 Robotics & Wearables
Motion Assistive Robot Control
Integrating this technology into care or rehabilitation robots and wearable devices could allow real-time detection of a user's spasticity state or movement intent. This would enable more personalized assistance and rehabilitation support, ensuring safe and effective motion assistance.
🚗 Autonomous Driving & HMI
Driver State Monitoring System
Evaluating subtle joint movements and body sway of drivers could lead to systems that detect fatigue, changes in physical condition, or signs of sudden illness. This system could enable autonomous driving systems to promptly identify driver abnormalities and initiate safe vehicle control, enhancing road safety.
Integration Roadmap — Estimated 18-Month Deployment
Phase 1: Technical Validation & Prototype Development
Duration: 3 months
Conduct foundational verification to optimize the technology's measurement principles and calculation algorithms for the licensee's existing systems or target environments. Develop a prototype using general-purpose sensors to confirm basic functionality.
Phase 2: Implementation & Clinical Evaluation
Duration: 6 months
Based on the prototype, proceed with system implementation for use in actual medical and rehabilitation settings. Collect and evaluate clinical data in a limited environment to verify system accuracy and practicality.
Phase 3: Productization & Market Launch
Duration: 9 months
Incorporate feedback from clinical evaluations to enhance product maturity. Advance necessary regulatory procedures, such as medical device approval, while initiating full-scale market deployment.
Technical Feasibility
This technology comprises relatively simple components: a general-purpose sensor for measuring joint angle changes and a calculation unit (software) for processing the data. The patent claims explicitly define a specific algorithm for calculating spasticity onset angle based on joint angular acceleration during extension movement, and defining spasticity magnitude as the integral of the difference between high-frequency and low-frequency components. This makes integration with existing motion capture systems or wearable sensors straightforward. Consequently, adopting companies can expect rapid deployment into existing medical and rehabilitation environments with minimal large-scale capital investment.
Success Scenario
Upon adopting this technology, rehabilitation facilities could objectively quantify patients' spasticity conditions with numerical data. This is expected to transform assessments from relying on the experience of skilled physical therapists to a data-driven approach, standardizing the entire rehabilitation process from planning to outcome verification. As a result, personalized rehabilitation programs could be provided to each patient, potentially shortening functional recovery periods by an average of 20%, contributing to increased patient satisfaction and facility utilization.
Patent Record
APPLICATION NO.
JP2016-049377
REGISTRATION NO.
6730573
FILING DATE
2016/03/14
GRANT DATE
2020/07/07
EXPIRATION DATE
2036/03/14
PATENT HOLDER
国立大学法人秋田大学
Examination History
2016-04-05
Invitation to Amend (Application)
2016-04-27
Amendment (Voluntary)
2019-03-11
Request for Examination
2020-01-14
Office Action
2020-02-21
Applicant's Response
2020-02-21
Amendment (Voluntary)
2020-05-19
Decision to Grant