Adaptive Knee Resection and Gap Balancing Systems for Specialized Environments

Publication ID: 24-11857202_0009_PTD
Published: November 07, 2025
Category:Specialized Variations & Niche Solutions

Legal Citation

pr1or.art Inc., “Adaptive Knee Resection and Gap Balancing Systems for Specialized Environments,” Published Technical Disclosure No. 24-11857202_0009_PTD, Published November 07, 2025, available at https://archive.pr1or.art/24-11857202_0009_PTD
This technical disclosure describes improvements that would be readily apparent to a Person Having Ordinary Skill In The Art (PHOSITA) when considered in combination with the foundational architecture disclosed in U.S. Patent No. 11,857,202.

Summary of the Inventive Concept

The present inventive concept discloses a family of knee resection and gap balancing systems tailored to specific, niche operational environments, including high-altitude, disaster relief, high-security, extreme weather, and remote, austere settings.

Background and Problem Solved

The original patent, 'Knee resection and gap balancing instruments and techniques for kinematic alignment,' provided a foundational system for total knee arthroplasties. However, this system may not be suitable for unique operational environments, where factors such as air pressure variations, limited resources, or security concerns can impact surgical accuracy and patient safety. The present inventive concept addresses these limitations by introducing adaptive, modular, and specialized knee resection and gap balancing systems.

Detailed Description of the Inventive Concept

The inventive concept comprises a series of modular, adjustable, and tamper-evident components designed to accommodate the specific demands of various operational environments. For instance, the high-altitude system features a modular tibial positioner device that compensates for air pressure variations affecting bone resection accuracy. The disaster relief system includes a portable, self-contained power source and a compact, waterproof design. The high-security system incorporates a tamper-evident tibial positioner device with secure, encrypted data storage for tracking surgical procedures and patient data. The extreme weather system features a weather-resistant, insulated femoral coupling block that maintains optimal temperature and humidity levels during the surgical procedure. The remote, austere environment system includes a manually operated, mechanical adjustment mechanism, allowing for precise, on-site adjustments to the guide without reliance on external power sources.

Novelty and Inventive Step

The inventive concept's novelty lies in its adaptive, modular design, which enables the system to be tailored to specific operational environments. The inventive step resides in the integration of specialized components and features that address the unique challenges and constraints of each environment, thereby ensuring improved surgical accuracy, patient safety, and overall system reliability.

Alternative Embodiments and Variations

Alternative embodiments of the inventive concept may include additional features, such as real-time environmental monitoring, automated adjustment mechanisms, or advanced data analytics capabilities. Variations of the system could also be designed for other specialized environments, such as space exploration or search and rescue operations.

Potential Commercial Applications and Market

The inventive concept has significant commercial potential in the orthopedic and medical device industries, particularly in the areas of specialized surgical systems and niche market applications. Target industries may include disaster relief organizations, high-security government agencies, and medical providers operating in remote or extreme environments.

CPC Classifications

SectionClassGroup
A A61 A61B17/155
A A61 A61B17/157
A A61 A61B17/1675
A A61 A61B17/1764
A A61 A61B17/90
A A61 A61B2017/564
A A61 A61B2090/061

Field of Art

Orthopedic surgical instrumentation, specifically knee arthroplasty positioning and resection systems, requiring advanced mechanical engineering, biomechanical knowledge, and surgical instrument design expertise

Person of Ordinary Skill (PHOSITA) Profile

A biomedical engineer or orthopedic surgical instrument designer with advanced mechanical engineering skills, understanding of surgical workflow, and expertise in adaptive medical device design with knowledge of environmental adaptation techniques

Obviousness Rationale

A PHOSITA would recognize that the source patent's fundamental knee resection positioning system provides a modular framework that can be readily adapted to specialized environmental conditions. The core mechanical coupling and positioning principles remain consistent, with variations primarily involving protective and adaptive features that are well-known design strategies in medical device engineering. The PTD's environmental adaptations represent predictable extensions of the source patent's core mechanical design principles.

Obvious Combinations & Variations

Source Patent Element
Tibial and femoral coupling blocks with laterally spaced coupler pins
PTD Variation
Modular tibial positioner device adaptable for high-altitude environments with air pressure compensation mechanisms
Obviousness Reasoning
A PHOSITA would recognize that environmental compensation is a standard design approach for precision medical instruments, with known techniques for maintaining dimensional stability across pressure variations
Source Patent Element
Adjustable extension mechanism for positioning cutting planes
PTD Variation
Manually operated mechanical adjustment mechanism for remote/austere environment surgical guides
Obviousness Reasoning
Mechanical adjustment principles are inherently transferable, and creating a manual override for precision positioning represents a predictable design variation for environments with limited technological infrastructure
Source Patent Element
Coupling block with multiple pin configurations
PTD Variation
Tamper-evident tibial positioner with encrypted data storage for high-security environments
Obviousness Reasoning
Integrating data tracking and security features into existing mechanical coupling structures is a known technique in medical device design, representing a straightforward technological enhancement
Source Patent Element
Femoral and tibial coupling system with interchangeable components
PTD Variation
Weather-resistant, insulated femoral coupling block maintaining temperature and humidity levels
Obviousness Reasoning
Material selection and environmental protection are standard design considerations, and a PHOSITA would find adding protective features to existing mechanical structures an obvious design optimization
35 U.S.C. § 103 Summary: Pursuant to 35 U.S.C. ยง 103, the variations disclosed in the published technical disclosure would have been obvious to a person having ordinary skill in the art at the time of invention, as they represent predictable adaptations of the fundamental positioning and coupling mechanisms disclosed in US Patent 11857202, employing known techniques of environmental adaptation and medical device design to extend the core technological framework.

Original Patent Information

Patent NumberUS 11,857,202
TitleKnee resection and gap balancing instruments and techniques for kinematic alignment
Assignee(s)Zimmer, Inc.