Bone Cutting Apparatus with Clamp and Reciprocating Blade
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Solution Overview
Problem
Conventional surgical instruments lack precision and stabilization features, making it difficult to remove osseous tissue without causing dural tears or compromising the accuracy of bone cuts during procedures like laminectomy.
Innovation Solution
The development of a surgical apparatus with a fixed portion, a clamp for gripping bone tissue, and multiple bone cutting devices arranged around the clamp, which include spring-loaded blades and blades coupled to rods and linear ball bearings, allowing for controlled reciprocating motion and precise cuts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional surgical instruments are used for bone removal, then the surgical procedure can be performed, but precision and stabilization are insufficient leading to potential dural tears and inaccurate bone cuts
Solution Approach 1:
The surgical instrument is divided into distinct functional segments: a stabilization component that anchors to the vertebral body, a cutting component with reciprocating blade, and a depth control mechanism. This segmentation allows each component to specialize in its function - stabilization ensures reliability while the cutting mechanism achieves precision through controlled reciprocating motion
Solution Approach 2:
The depth of the cut is predetermined and configured before the cutting action begins. The instrument is pre-adjusted to the required depth, and the stabilization component is secured to the vertebral body in advance, ensuring both precision (through pre-set depth) and reliability (through preliminary stabilization)
2Force
If conventional instruments apply unrestricted force to break through vertebrae, then bone removal can be achieved, but control and precision are lost
Solution Approach 1:
The cutting mechanism employs dynamic reciprocating motion rather than static or continuously applied force. The blade moves back and forth in a controlled reciprocating pattern, allowing force to be applied intermittently and precisely during the cutting stroke while retracting during the return stroke. This dynamic approach provides both sufficient cutting force and precise control
Solution Approach 2:
The instrument incorporates depth feedback through pre-configured depth stops and stabilization anchoring to the vertebral body. As the blade cuts through the lamina, the predetermined depth mechanism provides feedback that limits further penetration, ensuring precise force control and preventing excessive force application that would compromise accuracy
3Reliability
If precise and controlled bone cutting is performed, then dural tears are prevented, but the complexity of the surgical instrument increases
Solution Approach 1:
Multiple functions are merged into a single integrated instrument: stabilization anchoring to the vertebral body, reciprocating cutting action, and predetermined depth control are combined in one device. This merging reduces the need for multiple separate instruments and procedures, achieving dural protection through integrated design rather than through complex coordination of multiple components
Solution Approach 2:
The instrument performs self-stabilization by anchoring to the vertebral body and self-depth-control through pre-configured depth stops. The reciprocating cutting mechanism automatically limits its own penetration depth, providing dural protection through self-regulating features rather than requiring complex external control systems
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
The apparatus enables surgeons to perform precise and efficient removal of osseous tissue, reducing the risk of dural tears and allowing for controlled depth of cuts, thereby enhancing the safety and accuracy of surgical procedures.
Implementation Method 1
bone cutting devices that include spring-loaded blades
Implementation Method 2
blades coupled to rods and linear ball bearings
Data Source
AI summary
Embodiments of a device for forming incisions and extracting osseous tissue are disclosed. The device includes a body defining a channel. A blade is oriented in linear sliding engagement within the channel of the body. The device includes a stopping mechanism for restricting movement of the blade relative to the body. The device is engageable to an apparatus. The apparatus includes a fixed portion that defines a first end and a second end. A clamp is oriented along the fixed portion of the apparatus adjacent the device. The clamp and the device are collectively configured to remove bone tissue from a patient.