Nested Sleeve Surgical Instrument for Sequential Bone Dilation

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Solution Overview

Problem

Conventional surgical instruments with multiple components face challenges in secure engagement and efficient disengagement, leading to cumbersome and inefficient surgical procedures due to the need for successive insertion and removal of multiple instruments for tissue dilation.

Innovation Solution

A surgical instrument configuration featuring an outer sleeve, middle sleeve, and trocar, each with a handle and release mechanism, allowing for individual or combined engagement and easy insertion/removal, enabling sequential dilation without successive instrument changes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple separate instruments are used for sequential dilation, then the desired opening size can be achieved, but the surgical procedure becomes time-consuming and inefficient

Engineering Contradiction:

Improvesurgical efficiencyVSAvoidprocedural time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent employs a nested structure where multiple sleeves of different diameters are inserted within one another (smallest to largest). Each sleeve can be independently advanced to dilate tissue sequentially, eliminating the need to remove and replace multiple separate instruments. This nested configuration maintains coaxial alignment and enables efficient sequential dilation within a single integrated device.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Manufacturing precision

If multiple separate instruments are used for sequential dilation, then the desired opening size can be achieved, but the positioning precision and coaxial alignment become difficult to maintain

Engineering Contradiction:

Improvepositioning precisionVSAvoidinstrument coordination complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The nested sleeve structure inherently maintains coaxial alignment as each sleeve is designed to fit within the previous one with precise tolerances. The concentric arrangement ensures that all dilation elements remain aligned along the same axis, eliminating positioning errors that would occur with separate instruments.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

Multiple dilation functions are merged into a single integrated instrument assembly. The combined structure allows all sleeves to be manipulated as one unit while still enabling independent advancement of each sleeve, simplifying the coordination required for sequential dilation.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If multiple components are included in the instrument, then sequential dilation capability is achieved, but the engagement and disengagement of components becomes cumbersome

Engineering Contradiction:

Improvesequential dilation capabilityVSAvoidcomponent engagement ease

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

Multiple components are merged into a single integrated assembly where sleeves are nested within one another. This configuration allows all components to be engaged and disengaged simultaneously as one unit, eliminating the need for separate manipulation of each component while retaining sequential dilation functionality.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS8888780B2Method for using retractable stylet and cannula combination to form an opening in bone

Publication Date: 2014.11.18 WARSAW ORTHOPEDIC INC

AI summary

In one preferred aspect, a method is provided for forming an opening in bone for the sequential dilation of tissue.