Intraosseous Needle Handle Segmentation and Torque Control
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Solution Overview
Problem
Conventional intraosseous infusion methods face challenges in securely inserting and maintaining the needle within the bone, particularly in preventing needle backout and ensuring reliable fluid delivery, especially in emergency or pediatric scenarios where venous access is compromised.
Innovation Solution
A system comprising an intraosseous needle with a handle that includes a cylindrical body and a flared handle portion, featuring a channel and lobes, allows for secure engagement and insertion of the needle into the bone, utilizing a driving shaft and power driver for efficient penetration and counter-torque mechanisms to prevent needle movement during fluid infusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional intraosseous needle insertion methods are used, then the procedure can be performed with simple equipment, but the needle is prone to backout and unreliable fluid delivery
Solution Approach 1:
The handle is divided into distinct functional segments: a cylindrical body portion for needle reception, a flared handle portion for gripping and torque application, and a channel for needle passage. This segmentation allows each part to optimize its specific function while maintaining overall reliability.
Solution Approach 2:
The flared handle portion extends radially outward from the cylindrical body, creating a dimensional transition that provides leverage and grip surfaces without increasing the axial length. This dimensional change enables better operator control and torque application.
2Productivity
If manual insertion techniques are used, then the device structure can be simpler, but insertion efficiency and penetration capability are reduced
Solution Approach 1:
The driving shaft acts as an intermediary mechanical element between the handle and the needle. It transmits rotational and axial forces from the operator's manual manipulation of the handle to the needle, enabling controlled penetration through the bone cortex with enhanced mechanical advantage.
Solution Approach 2:
The driving shaft mechanism allows dynamic transmission of forces during insertion. The shaft can rotate and move axially within the handle channel, enabling the operator to apply variable torque and pushing forces to overcome bone resistance and achieve successful needle placement.
3Reliability
If the handle provides strong engagement with the needle, then needle stability is improved, but the ease of disengagement for needle removal is reduced
Solution Approach 1:
The channel design incorporates features that provide preliminary engagement resistance during insertion and use, preventing accidental needle dislodgement. The same channel geometry allows controlled disengagement when intentional removal is required, balancing stability with retrievability.
Solution Approach 2:
The flared handle portion creates an asymmetric engagement geometry where the needle is securely held during insertion and maintenance, but the asymmetric shape allows the operator to apply leverage for controlled removal when needed.
Data Source
AI summary
A system including includes an intraosseous needle and a handle. The intraosseous needle includes a distal end configured for insertion into a bone and a proximal end configured to extend from the bone. The handle is configured to releasably engage the intraosseous needle. The handle includes a cylindrical body portion, a handle portion, and a channel. The cylindrical body portion includes a distal end configured to receive the proximal end of the intraosseous needle. The handle portion extends from the cylindrical body portion and has a bulb-like cross-sectional shape and opposing first and second substantially planar surfaces. The channel is configured to receive the proximal end of the intraosseous needle.