High-Pressure Water Debridement System for Bone Tissue
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Solution Overview
Problem
Current soft tissue debridement from donated cadaveric human bone is a manually intensive and time-consuming process that poses risks of musculoskeletal disorders due to repetitive motions and the use of sharp objects, with existing automated systems facing challenges in time, safety, sterilization, and efficiency.
Innovation Solution
A high-pressure water debridement system that includes a cylindrical sleeve with high-pressure water nozzles and a central shaft, allowing for the automated removal of soft tissue from bone segments through rotational and oscillatory motion within a spray zone, eliminating the need for manual tissue removal and reducing operator exposure to sharp objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual debridement using metal gouges is used, then operators can remove soft tissue from bone, but the process is time-consuming (9 minutes for femur, 7 minutes for tibia) and causes hand-arm injuries and musculoskeletal disorders
Solution Approach 1:
The patent replaces manual mechanical debridement using metal gouges with an automated water jet system. High-pressure water (500-3000 psi) is directed at the bone surface to remove soft tissue, eliminating the need for operators to manually scrape with sharp instruments. This substitution resolves the contradiction by dramatically increasing debridement speed while completely removing operators from direct contact with sharp objects and repetitive motion hazards.
Solution Approach 2:
The system allows the bone itself to be the workpiece that is actively processed by the water jet without requiring manual manipulation. The bone is secured in a holder and the water jet automatically performs the debridement function, making the process self-service in the sense that the tool (water jet) directly acts on the workpiece (bone) without human intermediaries performing the repetitive scraping motion.
2Ease of operation
If automated systems are used for tissue debridement, then operator safety is improved, but challenges remain in time efficiency, sterilization, and effluent disposal
Solution Approach 1:
The system uses hydraulic principles by employing high-pressure water (500-3000 psi) as the primary debridement mechanism. The water jet system provides automated tissue removal while the hydraulic pressure enables effective debridement without complex mechanical cutting mechanisms. This approach simplifies the automated system compared to mechanical robots while maintaining operator safety and debridement effectiveness.
Solution Approach 2:
The system changes the fundamental parameter of debridement from mechanical contact (metal gouges) to fluid pressure (water jet). By adjusting water pressure between 500-3000 psi, the system achieves effective tissue removal while allowing for flexible control of the process intensity. This parameter change simplifies the overall system design compared to complex automated mechanical systems while addressing operator safety concerns.
3Productivity
If high-pressure water nozzles are used to impact bone segment, then debridement time is reduced to approximately 40 seconds, but high-pressure water requires proper effluent drainage and containment
Solution Approach 1:
The system extracts and removes the effluent (used water mixed with detached soft tissue) from the debridement zone through a drainage system. The effluent collection mechanism separates the waste material from the operational area, allowing for proper disposal while maintaining the high-speed debridement process. This extraction of harmful effluent resolves the contradiction by enabling rapid debridement while managing the waste product appropriately.
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 system significantly reduces debridement time from minutes to approximately 40 seconds, minimizes repetitive motions, and enhances safety by automating the process while maintaining a sterile environment, effectively addressing the inefficiencies and safety concerns of manual methods.
Implementation Method 1
one or more high-pressure water nozzles disposed on each side of the outer sleeve. Each of the high-pressure water nozzles may be positioned to impact the bone segment with a high-pressure water stream
Data Source
AI summary
There is disclosed a system and methods for debriding soft tissue from bone using a high-pressure water debridement system. One embodiment includes a cylindrical sleeve bounded by endcaps and having a drainage port positioned for effluent drainage. A central shaft is configured to receive a bone segment and is disposed along a longitudinal center of the sleeve and rotatively coupled between the endcaps. At least one high-pressure water nozzle is disposed on each side of the sleeve, each of which is positioned to impact the bone segment with a high-pressure water stream. A rotational actuator is configured to rotate the central shaft and the bone segment relative to the sleeve and the water nozzles such that when the high-pressure water nozzles are operational, the high-pressure water streams debride the bone segment. Other embodiments are also disclosed.