Cannulated Needle Graduated Markings Angulation Control
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Solution Overview
Problem
Current kyphoplasty and vertebroplasty procedures for treating bone fractures and disorders lack precise control over needle angulation and exposure, which can complicate the creation and filling of bone voids, especially in complex fracture morphologies and osteoporotic conditions.
Innovation Solution
A surgical system featuring a pre-formed, cannulated needle with markings indicating pre-determined angles, allowing for controlled angulation and exposure, enabling precise delivery of bone cement or tamping in various bone-related applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional kyphoplasty and vertebroplasty procedures are used without precise angulation control, then the procedure can be performed with simpler equipment, but the precision and controllability of needle placement and bone void filling deteriorates
Solution Approach 1:
The needle is pre-formed with a predetermined curvature that corresponds to a specific angulation angle. This preliminary shaping allows the needle to achieve the desired angulation without requiring complex adjustment mechanisms during surgery, thus improving measurement precision while avoiding excessive device complexity
Solution Approach 2:
The curved shape of the needle is pre-determined and replicated through the manufacturing process. The needle body itself serves as a template for the desired angulation, eliminating the need for complex positioning devices and simplifying the overall surgical instrument design while maintaining precise angle control
2Reliability
If a pre-formed curved needle with markings is used, then the controllability and safety of the procedure improves, but the manufacturing complexity of the needle increases
Solution Approach 1:
The needle is manufactured with specific geometric parameters including a predetermined curvature radius and length that correspond to the desired angulation angle. By controlling these physical parameters during manufacturing, the needle achieves reliable angle control without requiring complex assembly or adjustment mechanisms, thus improving safety while maintaining manufacturing simplicity
Solution Approach 2:
Graduated markings are applied to the needle surface to indicate different angulation angles and exposure distances. These visual indicators provide clear feedback to the practitioner during the procedure, enhancing safety and controllability without adding mechanical complexity to the manufacturing process
3Ease of operation
If graduated markings are added to indicate angulation angles, then the ease of operation improves, but the manufacturing precision requirements increase
Solution Approach 1:
The graduated markings are pre-positioned on the needle during the manufacturing process at locations that correspond to specific angulation angles. This preliminary placement allows practitioners to easily identify the correct angle by visual alignment without requiring complex measurement tools, improving ease of operation while the markings serve as built-in reference points that simplify the manufacturing precision requirements
Data Source
AI summary
A surgical instrument includes a first member defining an axis and including an end surface and a passageway. A second member is movably disposed within the passageway and includes a tip and a plurality of spaced apart markings. The second member is movable between a first configuration in which the tip extends parallel to the axis and a second configuration in which the tip extends transverse to the axis. The end surface is aligned with a first one of the markings when the second member is in the first configuration and the end surface is aligned with a second one of the markings when the second member is in the second configuration. Methods are disclosed.