Spinal Implant Delivery Instrument With Threaded Receiver Capture
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Solution Overview
Problem
Existing surgical treatments for spinal disorders, such as scoliosis and degenerative disc disease, often rely on spinal implants like vertebral rods and fasteners, but there is a need for improved instruments and methods to efficiently and accurately deliver and secure these implants during surgical procedures.
Innovation Solution
A surgical instrument with a driver and actuator assembly, including an inner and outer sleeve, that allows for releasable connection and threaded engagement with bone fasteners, enabling precise implantation and fixation, potentially assisted by robotic navigation, and compatible with various surgical approaches and positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional spinal implant delivery methods are used, then surgical procedures can be performed, but the precision and efficiency of implant delivery is insufficient
Solution Approach 1:
The delivery system is divided into multiple components: an outer cannula for guidance, an inner plunger for actuation, and a separate implant. This segmentation allows for precise control of implant placement while maintaining surgical efficiency through modular assembly and operation.
Solution Approach 2:
The outer cannula acts as an intermediary guide that directs the implant to the precise target location, while the inner plunger serves as a mediator to push the implant forward controlledly. This intermediary mechanism enables both high precision and efficient delivery.
2Reliability
If spinal implants are used to provide stability and fixation, then vertebral alignment is restored, but the complexity of the surgical instrument increases
Solution Approach 1:
The delivery system is designed with universal features that allow it to deliver different types of spinal implants through a single standardized interface. The outer cannula and inner plunger configuration can accommodate various implant sizes and types, reducing the need for multiple specialized instruments while maintaining reliable fixation.
3Reliability
If threaded engagement with bone fastener receiver is implemented, then secure capture of implant is achieved, but the device complexity increases
Solution Approach 1:
The threaded engagement features are integrated directly into the implant structure itself, merging the capture mechanism with the implant. This eliminates the need for separate complex engagement devices while ensuring secure capture through the threads formed on the implant's longitudinal axis.
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
Facilitates accurate and efficient implantation of spinal constructs, providing stability and alignment, while allowing for versatility in surgical techniques and positions, and supporting bone integration with optional therapeutic agents.
Implementation Method 1
The inner sleeve is rotatable relative to the outer sleeve and threadably engageable with the bone fastener receiver to capture the bone fastener receiver
Data Source
AI summary
A surgical instrument includes a first member and an actuator disposed with the first member. An assembly is provided that includes a second member engageable with a bone fastener receiver. A third member is rotatable relative to the second member and threadably engageable with the bone fastener receiver to capture the bone fastener receiver. Systems, spinal constructs, implants and methods are disclosed.