Spinal Cage Hammer Guide Cavity for Precise Force Application
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Solution Overview
Problem
The precise application of a hammering force with desired amplitude and direction to a spinal cage holder is challenging, leading to prolonged operation times and increased effort during spinal cage placement in spinal surgery.
Innovation Solution
A spinal cage hammer with an elongated body and cavities of varying diameters, featuring a slit for easy insertion of the holder, allows for controlled linear force application, facilitating precise positioning of the spinal cage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If repeated hammering is applied to the spinal cage holder to achieve correct placement, then the spinal cage can be positioned in the desired location, but the operation time is prolonged and the effort required by the surgeon increases
Solution Approach 1:
The guide device acts as an intermediary between the hammer and the spinal cage holder, mediating the force application. The guide device includes a guide body with a guide cavity that receives the spinal cage holder, and a guide surface that contacts the holder to direct force application. This intermediary structure enables precise force transmission while reducing the need for repeated hammering attempts.
Solution Approach 2:
The guide device changes the parameters of force application by providing a structured interface between the hammer and holder. The guide surface is configured to receive and direct the hammer blow, transforming uncontrolled impact into controlled, directed force. This parameter control allows correct placement to be achieved with fewer hammering actions.
2Manufacturing precision
If repeated hammering is applied to the spinal cage holder to achieve correct placement, then the spinal cage can be positioned in the desired location, but the effort required by the surgeon increases
Solution Approach 1:
The guide device serves as a mediator that reduces the direct effort required by the surgeon. By providing a mechanical interface with the guide cavity and guide surface, the device absorbs and directs the hammering force, reducing the manual dexterity and effort needed compared to direct hammering on the holder.
Solution Approach 2:
The guide device replaces the direct manual mechanical operation of hammering with a guided mechanical system. The guide body, guide cavity, and guide surface create a mechanical guidance system that substitutes for the surgeon's direct control, making the operation easier while maintaining precision.
3Productivity
If uncontrolled hammering force is applied to the spinal cage holder, then the spinal cage can be inserted, but the amplitude and direction of the force cannot be precisely controlled
Solution Approach 1:
The guide device's guide surface acts as an intermediary that controls the amplitude and direction of the hammering force. The geometric configuration of the guide surface and guide cavity creates a mechanical constraint that ensures force is applied in the correct direction with appropriate amplitude, enabling both efficient insertion and precise force control.
Solution Approach 2:
The guide device changes the parameters of force application through its geometric structure. The guide cavity dimensions, guide surface angle, and overall device geometry are designed to transform uncontrolled hammering into controlled force with specific amplitude and direction parameters, achieving both productivity and measurement precision.
Data Source
AI summary
The present invention concerns a spinal cage hammer including an elongated body comprising a proximal end and a distal end, the elongated body extending from the proximal end to the distal end and defining a cavity extending from the proximal end to the distal end, the at least one cavity being configured to receive at least one portion of a spinal cage holder for holding a spinal cage. The spinal cage hammer includes an interface wall or surface configured to enter into contact with the spinal cage holder to transfer a force to the spinal cage holder.