Spiral-Cooled Grinding Drill for Minimally Invasive Spine Surgery
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Solution Overview
Problem
Existing grinders for minimally invasive spinal surgeries require large amounts of coolant and fail to effectively cool the grinding rod, leading to thermal damage to tissues and complicating the surgical field of vision.
Innovation Solution
A grinding drill with a built-in cooling system using a spiral cooling passage and coaxial multi-tube structure to deliver cooling water directly to the grinding rod, reducing the need for external coolant and enhancing surgical efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If external physiological saline is continuously introduced for cooling the grinding rod, then the cooling effect is improved, but the surgical field of vision is affected due to discharged coolant accumulation
Solution Approach 1:
The patent extracts the cooling function from external continuous saline introduction and integrates it into the grinding rod assembly itself. The cooling water is delivered through channels within the grinding rod assembly, and the system is designed to remove spent coolant efficiently, separating the cooling function from the external environment and eliminating the visual obstruction problem.
Solution Approach 2:
The patent introduces a cooling water delivery system as an intermediary between the coolant source and the grinding rod. This intermediary system (including channels, nozzles, and circulation pathways) delivers cooling water precisely where needed and facilitates efficient removal of heated coolant, mediating between the cooling requirement and the surgical field visibility requirement.
2Device complexity
If traditional manual grinders are used, then the device complexity is reduced, but the surgical efficiency and precision are insufficient
Solution Approach 1:
The patent merges multiple functions into the grinding rod assembly: the grinding function, the cooling function, and the fluid delivery function are combined in a single integrated assembly. This integration increases surgical efficiency and precision while keeping the overall device structure relatively simple and manageable.
Solution Approach 2:
The grinding rod assembly is designed as a multi-functional unit that performs grinding, cooling, and fluid delivery simultaneously. This universal design eliminates the need for separate manual operations and instruments, thereby improving surgical efficiency without significantly increasing device complexity.
3Productivity
If the grinding rod rotates at high speed, then the productivity is improved, but the thermal damage to surrounding tissues increases
Solution Approach 1:
The patent implements preliminary cooling action by delivering cooling water to the grinding rod and surrounding areas before and during the high-speed grinding operation. The cooling system is activated in advance and continues throughout the procedure, preventing thermal accumulation and protecting surrounding tissues from thermal damage while maintaining high grinding speeds.
Solution Approach 2:
The patent converts the harmful heat generated by high-speed grinding into a beneficial cooling effect. By strategically delivering cooling water through the grinding rod assembly and surrounding structures, the system uses the heat generation itself to drive the cooling circulation, transforming the harmful thermal effect into a beneficial cooling mechanism that protects tissues.
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 effectively cools the grinding rod, minimizing thermal damage and improving surgical precision by reducing the amount of coolant needed and optimizing surgical space utilization.
Implementation Method 1
a spiral cooling passage communicated with a water injection hole of the sleeve is provided between an inner wall of the housing assembly and an outer wall of the sleeve; the grinding rod assembly is provided with a water inlet; and the water inlet is communicated with the cooling passage through a chamber inside the housing assembly
Implementation Method 2
The cooling water enters the grinding rod assembly through the water inlet and cools the grinding rod assembly and the inner grinding rod
Data Source
AI summary
A grinding drill with a cooling function for a minimally invasive spinal surgery includes a grinder fixture, a grinding rod assembly, and a grinder. The grinder fixture includes a housing assembly and a sleeve located inside the housing assembly. One end of the grinding rod assembly extends into the housing assembly and is connected to the sleeve through a connecting shaft. An inner grinding rod is rotatably provided in the grinding rod assembly. The grinder runs through the other end of the grinding rod assembly and is connected to the inner grinding rod. An end of the inner grinding rod away from the grinder extends into the sleeve and is rotatably connected to the sleeve through a transmission element. A spiral cooling passage communicated with a water injection hole of the sleeve is provided between an inner wall of the housing assembly and an outer wall of the sleeve.