Adjustable Depth Drill Guide Telescopic Trigger Mechanism

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Solution Overview

Problem

Current drill guides require surgeons to remove the device from the surgical site to adjust depth, leading to inefficiency, increased risk of infection, and opportunities for error during posterior cervical surgical procedures.

Innovation Solution

An adjustable depth drill guide with a telescopic rotational assembly and trigger mechanism that allows for incremental depth adjustments without removing the device from the surgical site, enabling one-handed operation to increase or decrease the drill depth in small increments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If the drill guide is removed from the surgical opening to adjust depth, then the depth can be reset to the appropriate length, but the procedure becomes time-consuming and increases infection risk

Engineering Contradiction:
Improvedrill depth precisionVSAvoidprocedural time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

The drill guide incorporates a dynamic adjustment mechanism with a telescopic shaft and trigger assembly that allows the depth to be modified while the guide remains positioned in the surgical opening. The trigger mechanism enables the shaft to extend or retract, providing real-time depth adjustment without removal.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The drill guide is pre-positioned in the surgical opening with an initial depth setting. The adjustment mechanism is designed to allow immediate modification of this preliminary position without requiring removal and reinsertion, thereby preserving the preliminary action of guide placement.

Inventive Principle:
Principle #10Preliminary action

2Manufacturing precision

If the drill guide is removed and reinserted for depth adjustment, then the depth can be corrected, but multiple opportunities for error and infection risk increase

Engineering Contradiction:
Improvedrill depth precisionVSAvoidinfection risk
Core Design Contradiction:
Manufacturing precisionVSReliability

Solution Approach 1:

The trigger assembly and telescopic shaft create a dynamic system where depth adjustment occurs through controlled extension and retraction of the shaft while the guide remains stationary in the surgical opening, eliminating the need for removal and reinsertion that would introduce infection risk.

Inventive Principle:
Principle #15Dynamics

3Ease of operation

If two hands are used to adjust the drill guide depth, then precise control is achieved, but the surgeon cannot maintain the drill in the other hand

Engineering Contradiction:
Improvedepth adjustment controlVSAvoidhand availability
Core Design Contradiction:
Ease of operationVSAdaptability or versatility

Solution Approach 1:

The trigger assembly is designed to be actuated by a single hand while the drill guide remains positioned in the surgical opening. The mechanical linkage allows one-handed operation for depth adjustment, freeing the other hand to maintain control of the drill bit.

Inventive Principle:
Principle #25Self-service

4Productivity

If the drill guide is left in the surgical opening for continuous use, then efficiency is improved, but real-time depth adjustments become difficult

Engineering Contradiction:
Improvesurgical efficiencyVSAvoiddepth adjustment capability
Core Design Contradiction:
ProductivityVSEase of operation

Solution Approach 1:

The telescopic shaft coupled with the trigger assembly provides a dynamic adjustment mechanism that operates while the guide is continuously positioned in the surgical opening. The shaft can extend or retract in real-time through trigger actuation, maintaining both continuous use and adjustability.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS12185955B2Adjustable depth drill guide
Publication Date: 2025.01.07 NUVASIVE INC
  • US12185955B2 patent drawing
  • US12185955B2 patent drawing
  • US12185955B2 patent drawing

AI summary

The present disclosure in one aspect provides an adjustable depth drill guide comprising a trigger assembly further comprising a trigger and a primary actuating element and a telescopic rotational assembly which abuts the primary actuating element and further comprises an intermediate actuating element. The drill guide described herein allows a surgeon to adjust the depth of the drill guide using only one hand while in-situ.