Two-Piece Endoscopic Spine Implant Instrument With Clamp Release
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Solution Overview
Problem
Current endoscopic spine implant installation instruments face challenges in accurately placing and deploying interbody spine implants within the constraints of an endoscope, necessitating a more precise and minimally invasive solution.
Innovation Solution
A two-piece spine implant installation instrument comprising a handle assembly and a shaft assembly, where the shaft assembly includes a clamp at its distal end to hold an expandable interbody spine implant, which is secured by a rotatable knob mechanism that allows for controlled insertion and release through an endoscope.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single-piece endoscopic spine implant installation instrument is used, then the device structure is simple, but the accuracy of implant placement and deployment is insufficient
Solution Approach 1:
The installation instrument is divided into multiple separate components: a handle assembly, a shaft assembly, a clamp assembly, and a deployment instrument. This segmentation allows each component to be optimized for its specific function, enabling precise implant placement through coordinated action of individual parts while maintaining overall device manageability.
Solution Approach 2:
The two-piece construction allows the shaft assembly to be inserted through the endoscope, with the clamp assembly nested on the shaft and the deployment instrument nested within the clamp assembly. This nesting arrangement enables precise implant deployment through the constrained endoscopic pathway while maintaining structural integrity.
2Object-affected harmful factors
If traditional open surgery is used for spine implant installation, then the implant can be placed accurately, but tissue trauma and post-operative pain are significant
Solution Approach 1:
The endoscope serves as an intermediary tool, providing visual guidance and a constrained pathway for instrument insertion. The two-piece installation instrument works through this endoscopic intermediary to achieve accurate implant placement while minimizing tissue disruption, as the instruments travel through a small incision rather than requiring large open surgical access.
Solution Approach 2:
The invention replaces the traditional open mechanical exposure and manual implant placement with an endoscopic-guided mechanical system. The combination of endoscopic visualization and the specialized two-piece instrument allows for precise control of implant placement through a minimally invasive pathway, substituting the need for large-scale mechanical tissue retraction and exposure.
3Object-affected harmful factors
If an endoscope is used for spine surgery, then tissue trauma is minimized, but the constraints of the endoscope make accurate implant placement difficult
Solution Approach 1:
The two-piece construction provides dynamic adaptability, allowing the shaft assembly to be inserted through the endoscope while the clamp assembly and deployment instrument can be manipulated independently once positioned. This dynamic configuration enables the surgeon to navigate the endoscopic constraints initially, then achieve precise implant placement through controlled manipulation of the deployed components.
Solution Approach 2:
The invention adds the dimension of temporal sequencing to the procedure - the shaft assembly is inserted through the endoscope first, then the clamp assembly is positioned and secured, and finally the deployment instrument is used to place the implant. This multi-stage, time-sequenced approach allows each component to be optimized for its specific phase of the procedure, overcoming the spatial constraints of the endoscope.
Data Source
AI summary
A two-piece medical instrument for installing an expandable interbody (intervertebral) spine implant via an endoscope, has a handle assembly and a shaft assembly configured for extension through the endoscope, the shaft assembly holding an expandable interbody spine implant when the shaft assembly is fully received by a head of the handle assembly, and releasing the spine implant upon retraction of the shaft assembly from the head of the handle assembly. The shaft assembly has a rod with a longitudinal bore and a sleeve situated on the rod that axially moves relative to the rod in response to the reception into and retraction from the handle assembly head, with the sleeve controlling capture and release of the implant by the rod. The distal end of the rod has a clamp formed by jaws that flex to capture and release the implant.