Combined Bone Tap and Rasp for Spinal Stenosis Surgery
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Solution Overview
Problem
Current surgical procedures for spinal stenosis require multiple steps and instruments, including separate bone rasps and taps, which can complicate the process and increase the risk of intraoperative spinous process fracture.
Innovation Solution
A combined bone rasp and tap instrument that integrates a tapered head with longitudinal channels, threaded sections, and lateral lumens, allowing for simultaneous distraction, decortication, and sizing of the spinous processes, thereby reducing the number of surgical steps and improving safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If separate bone rasp and tap devices are used, then the surgical procedure can be performed with traditional multi-step process, but the device complexity and number of surgical steps increase
Solution Approach 1:
The patent combines the functions of a bone rasp and a bone tap into a single integrated device. The tapered head includes both rasping surfaces for bone removal and threaded sections for tapping, allowing both functions to be performed with one instrument rather than requiring separate devices.
Solution Approach 2:
The combined device performs multiple functions: it can rasp bone to create initial access and remove tissue, then tap threads into the bone for implant fixation, and provide sizing information through lateral lumens. This multi-functional design eliminates the need for multiple specialized instruments.
2Reliability
If multiple separate instruments are used for distraction and decortication, then traditional surgical protocol is followed, but the risk of intraoperative spinous process fracture increases
Solution Approach 1:
By combining distraction and decortication functions in one instrument, the patent reduces the number of instrument exchanges and surgical steps, thereby reducing the risk of accidental bone fracture while maintaining traditional surgical protocols.
3Productivity
If separate bone rasp and tap devices are used, then traditional multi-step preparation is performed, but the surgical time and procedure duration increase
Solution Approach 1:
The combined device allows continuous performance of rasping and tapping operations without removing the instrument or exchanging devices. The threaded sections can engage with bone immediately after rasping, maintaining continuous useful action and reducing surgical time.
4Manufacturing precision
If traditional separate instruments are used, then standard surgical protocol is followed, but the precision of decortication control is reduced
Solution Approach 1:
The tapered head features localized rasping surfaces at specific locations designed to provide controlled decortication. The geometry and positioning of these rasping surfaces ensure consistent bone preparation while limiting the degree of decortication to prevent fracture.
Data Source
AI summary
A system and method for providing a surgical instrument having a shaft with a proximal end, a distal end, a longitudinal axis, and a central lumen extending therethrough; and a tapered head at the distal end. The tapered head has a plurality of longitudinal channels, a plurality of threaded sections, and a plurality of lateral lumens. The plurality of longitudinal channels may form a plurality of flutes configured to cut bone, tissue, or both.