Ultrasonic Atomization Cooling for Neurosurgical Bone Grinding
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Solution Overview
Problem
Current neurosurgical bone grinding techniques face challenges with temperature control, leading to thermal damage and osteonecrosis due to high-speed grinding, and existing atomization devices fail to effectively inject superfine droplets into the grinding zone for controlled cooling and lubrication.
Innovation Solution
A neurosurgical ultrasonic focusing assisted three-stage atomization cooling device that uses pneumatic, ultrasonic, and electrostatic mechanisms to produce superfine droplets from a medical nanofluid, which are injected into the grinding zone for effective cooling and lubrication, and the device also forms a protective film on postoperative wounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-speed micro grinding wheels are used for bone removal, then surgical efficiency is improved, but thermal damage to surrounding tissues occurs
Solution Approach 1:
The patent introduces saline solution as an intermediary cooling medium between the grinding wheel and bone tissue. The saline is delivered through a delivery system that positions it at the grinding interface, where it absorbs heat generated during high-speed grinding and prevents thermal damage to surrounding tissues while maintaining surgical efficiency
Solution Approach 2:
The patent utilizes the phase transition of saline from liquid to vapor through ultrasonic atomization. The ultrasonic atomizing nozzle converts liquid saline into fine mist droplets that rapidly evaporate at the grinding interface, absorbing large amounts of heat through the phase change process and effectively controlling grinding temperature
2Object-affected harmful factors
If saline drip cooling is used during bone grinding, then thermal damage is reduced, but temperature control precision is insufficient
Solution Approach 1:
The patent replaces the conventional mechanical drip cooling system with an ultrasonic atomization system. The ultrasonic atomizing nozzle uses high-frequency mechanical vibrations to generate fine mist droplets with uniform size distribution, providing precise and controllable cooling at the grinding interface, thereby improving temperature control precision
Solution Approach 2:
The patent changes the physical parameters of the cooling medium delivery system by using ultrasonic vibration to atomize saline into fine droplets. This parameter change allows for better heat transfer efficiency and more precise temperature control at the grinding interface compared to conventional drip cooling
3Temperature
If conventional atomization devices are used for cooling, then cooling effect is provided, but superfine droplets cannot be effectively injected into the grinding zone
Solution Approach 1:
The patent employs ultrasonic mechanical vibration in the atomizing nozzle to generate superfine droplets. The high-frequency vibration creates intense shear forces that break up liquid into extremely fine droplets, which are then effectively injected into the grinding zone by the vibration-induced airflow and pressure differential
Solution Approach 2:
The ultrasonic atomizing nozzle operates with periodic high-frequency vibrations, creating pulsating droplet ejection that enhances injection effectiveness into the grinding zone. The periodic action ensures continuous supply of fresh cooling droplets while maintaining effective penetration into the grinding interface
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 device achieves precise temperature control, reduces thermal damage, enhances convective heat exchange, and facilitates flexible operation in narrow spaces, while providing effective cooling and lubrication during bone grinding and protecting wounds post-surgery.
Implementation Method 1
at least two layers of piezoelectric ceramic sheets II are arranged at the top of the horn II... high-frequency electric oscillation signals are converted into an axial high-frequency vibration
Implementation Method 2
the nanofluid subjected to pneumatic, ultrasonic vibration and static electricity enters the grinding zone for cooling
Implementation Method 3
pneumatic, ultrasonic, and electrostatic mechanisms to produce superfine droplets from a medical nanofluid
Implementation Method 4
compressed air is applied to a nozzle assembly, and guided to an atomizing surface through ports, compartments and channels
Implementation Method 5
a spinning system applied to wound dressing is sprayed onto a postoperative wound surface in the form of spinning fibers after three-stage atomization
Implementation Method 6
enhances convective heat exchange, and facilitates flexible operation in narrow spaces, while providing effective cooling and lubrication during bone grinding
Implementation Method 7
the horn II is closely connected with the piezoelectric ceramic sheets II to amplify the amplitude
Implementation Method 8
pneumatic, ultrasonic, and electrostatic mechanisms to produce superfine droplets
Implementation Method 9
pneumatic, ultrasonic, and electrostatic mechanisms to produce superfine droplets from a medical nanofluid
Data Source
AI summary
A neurosurgical ultrasonic focusing assisted three-stage atomization cooling and postoperative wound film forming device has a transducer housing and a nozzle, wherein a horn is arranged in the transducer housing, at least two layers of piezoelectric ceramic sheets are arranged at the top of the horn, an electrode sheet connected with an ultrasonic generator is arranged between two adjacent layers of piezoelectric ceramic sheets, the bottom of the transducer housing is of a hemispherical structure, and a plurality of piezoelectric elements connected with the ultrasonic generator are arranged inside the hemispherical structure; and the nozzle is arranged at the bottom of the horn and connected with a medical nanofluid storage cup, compressed gas can also be introduced into the nozzle, and an electrode is also arranged inside the nozzle.