Surgical Shaver Fluid Path Heat Management
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Solution Overview
Problem
Conventional arthroscopic shavers face challenges in cleaning and sterilization due to trapped fluid and tissue, and generate excessive heat during use, compromising sterility and user comfort.
Innovation Solution
A surgical cutting device with a detachable housing configuration that exposes fluid and tissue pathways for easy cleaning and sterilization, and incorporates a fluid flow path to manage heat by diverting fluid away from driver components, reducing contact and overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cleaning techniques (brushing and automated washing) are used to clean the handpiece, then tissue and fluid are removed from the exterior, but biological material remains trapped inside the handpiece pathways
Solution Approach 1:
The handpiece is divided into separable components (driver assembly and cutting assembly) with exposed fluid pathways. The housing includes open ends that allow cleaning solutions to access internal pathways, segmenting the cleaning process into accessible zones that can be thoroughly flushed without disassembling internal mechanisms.
Solution Approach 2:
The device design incorporates pre-exposed fluid pathways and open housing ends before cleaning occurs. This preliminary structural arrangement allows cleaning solutions to immediately access critical fluid pathways without requiring complex disassembly, ensuring that sterility requirements are met before the cleaning process even begins.
2Ease of operation
If aggressive brushing operations are used to clean the handpiece, then exterior tissue is removed, but mechanical components and seals are damaged
Solution Approach 1:
The handpiece structure segments cleaning-accessible areas from protected mechanical components. Fluid pathways are designed to be externally accessible through open housing ends, allowing gentle flushing to remove biological material without requiring aggressive brushing that would damage internal seals and mechanical parts.
Solution Approach 2:
The device utilizes hydraulic flushing through exposed fluid pathways to clean the handpiece. Cleaning solutions are pumped through the open-ended housing and fluid channels, using fluid dynamics to remove biological material without mechanical contact, thereby protecting seals and mechanical components from damage.
3Temperature
If fluid flow path extends parallel to longitudinal axis through the shaft, then heat is managed by diverting fluid away from driver components, but fluid and tissue can still become lodged inside the handpiece
Solution Approach 1:
The fluid flow path is segmented into distinct zones: a distal portion extending parallel to the longitudinal axis for heat management near driver components, and a proximal portion extending at an acute angle toward the open end for easy access cleaning. This segmentation allows the same fluid pathway to serve both thermal management and sterility maintenance functions.
Solution Approach 2:
The fluid pathway transitions from a parallel orientation (for heat management) to an acute angle orientation (for cleaning access) along the longitudinal axis. This dimensional transition creates a pathway that efficiently manages heat while also providing direct access to open ends for thorough cleaning and sterility maintenance.
4Reliability
If the handpiece housing is sealed to protect internal components, then mechanical components are protected from damage, but fluid and tissue become trapped inside making cleaning difficult
Solution Approach 1:
The housing is designed with open ends that selectively expose fluid pathways while protecting mechanical components. The driver assembly housing includes open proximal and distal ends that allow fluid and cleaning solutions to access internal pathways, while the mechanical driver components remain protected within the structured housing framework.
Solution Approach 2:
The open-ended housing structure acts as an intermediary between the external cleaning environment and internal mechanical components. It allows cleaning solutions to access fluid pathways for thorough cleaning while simultaneously protecting the mechanical driver components from direct exposure to cleaning agents and physical damage.
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
Enhances cleaning efficiency, reduces the risk of contamination, and mitigates heat generation, improving user comfort and device performance by effectively diverting fluid and tissue away from critical components.
Implementation Method 1
a fluid flow path from an inlet to an outlet of the second housing, wherein at least a portion of the fluid flow path is configured to extend substantially adjacent to at least a portion of the driver components... diverting fluid away from driver components, reducing contact and overheating
Data Source
Figure 1
Figure 2~3
Figure 4~5B
AI summary
A handle assembly for use in conjunction with a surgical cutting device is provided. The handle assembly can generally include two, detachable pieces or housings. The first housing can include electrical and mechanical components for driving a cutting assembly, such as a motor, while the second housing can include a fluid flow path that allows fluid to flow from the surgical site to a location outside of the cutting device. At least a portion of the fluid flow path can extend substantially adjacent to at least a portion of one or more components used to drive the cutting assembly to help manage the heat output of the components. The fluid flow path allows the fluid to exit the device without coming into contact with components like a motor, while also helping to cool the handle assembly. Systems and methods for cutting tissue are also provided.