Interspinous Distractor With Ogive Expansion for Stable Insertion

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Solution Overview

Problem

Existing interspinous vertebral distraction devices and procedures are complicated, costly, and face difficulties in stable insertion and positioning, with complex kinematics and low stability post-implantation.

Innovation Solution

An interspinous vertebral distractor with a base body featuring symmetrical depressions for spinous process accommodation, expandable wings, and a simplified actuator mechanism for controlled expansion and contraction, facilitating easy and stable insertion and positioning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional distractors with mobile wings are used, then vertebral distraction can be achieved, but the control kinematics becomes particularly complex and insertion stability is difficult to ensure

Engineering Contradiction:

Improveinsertion stabilityVSAvoidcontrol kinematics complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent inverts the traditional expansion mechanism by using a central ogive element that pushes outward against spinous processes, rather than using mobile wings that rotate outward. This inversion simplifies the control mechanism from complex rotational kinematics to a straightforward linear expansion motion, while maintaining reliable stabilization through the ogive's geometric shape and symmetric expansion pattern.

Inventive Principle:

Principle #13The other way round (Inversion)

2Reliability

If multiple mobile wings with complex rotation mechanisms are used, then anchoring capability is improved, but the procedure becomes more complicated and expensive

Engineering Contradiction:

Improveanchoring capabilityVSAvoidprocedural simplicity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent merges multiple expansion functions into a single central ogive element that performs the anchoring function previously distributed across multiple mobile wings. This consolidation reduces the number of moving parts and control mechanisms required, simplifying both the device structure and surgical procedure while maintaining effective anchoring capability through the ogive's ability to expand symmetrically and engage spinous processes.

Inventive Principle:

Principle #5Merging (Combining)

3Stability of the object's composition

If fixed wings enclosing the column are used, then structural stability is improved, but the ease of insertion and extraction is reduced

Engineering Contradiction:

Improvestructural stabilityVSAvoidease of insertion and extraction

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The patent employs a dynamic expansion mechanism where the central ogive transitions from a compact insertion state to an expanded anchoring state. The ogive's ability to expand radially outward after insertion provides structural stability similar to fixed wings, while its initial compact configuration and controlled expansion enable easier insertion and extraction compared to pre-formed fixed wing structures.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20250345102A1Interspinous vertebral distractor

Publication Date: 2025.11.13 DIAMETROS MEDICAL SRL

AI summary

An interspinous vertebral distractor, designed to be placed between two spinous processes and defining a longitudinal axis, a sagittal plane, and a frontal plane; the distractor includes a base body designed to be placed between the two spinous processes and defining a first end and a second end; an anchoring unit designed to expand attaching the distractor between two spinous processes; an actuator designed to control the passage of the unit between an expanded position and a contracted one; the base body has a sagittal section with two opposing convexities to define a profile with two depressions.