Curved Bone Cement Cannula with Side Orifices
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Solution Overview
Problem
Conventional methods for delivering stabilizing materials into bone structures, such as vertebroplasty, often require multiple needle insertions and risk tissue or bone puncture due to the use of straight or curved needles with axial openings, which can lead to incomplete material distribution and potential leakage through bone defects.
Innovation Solution
A delivery cannula with a blunt distal end and side orifices allows for radial infusion of curable materials, minimizing the risk of puncturing bone or tissue and enabling more thorough distribution, even when the distal end is in contact with bone, and includes a deflectable segment with shape memory characteristics for improved access and control during procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a straight needle cannula is used to deliver bone stabilizing material, then the procedure can be performed with a simple device, but multiple insertions are required and there is a risk of puncturing or coring tissue
Solution Approach 1:
The needle cannula is designed with a curved configuration instead of straight, allowing it to navigate anatomical structures more effectively. The curved needle can access the vertebral body through a single pedicular approach while following the natural curvature of the bone, eliminating the need for multiple insertions and reducing the risk of tissue puncture.
Solution Approach 2:
The needle cannula incorporates multiple openings (distal opening and one or more proximal openings) segmented along its length. This segmentation allows bone stabilizing material to be delivered through multiple pathways simultaneously, ensuring complete filling of the vertebral body cavity and preventing material leakage through bone defects.
2Manufacturing precision
If multiple needle insertions are performed to access the bone site, then complete material distribution can be achieved, but operating time increases and patient trauma is increased
Solution Approach 1:
The needle cannula incorporates multiple openings (distal opening and one or more proximal openings) segmented along its length. This segmentation allows bone stabilizing material to be delivered through multiple pathways simultaneously, ensuring complete filling of the vertebral body cavity and preventing material leakage through bone defects.
Solution Approach 2:
The needle cannula is pre-configured with a curved shape and multiple openings before insertion. This preliminary configuration allows the single inserted needle to automatically adapt to the vertebral anatomy and distribute material through multiple pathways, achieving complete material distribution without requiring multiple insertions or additional procedural steps.
3Productivity
If a single needle insertion is performed, then operating time is reduced and patient trauma is minimized, but complete access to the bone site cannot be achieved
Solution Approach 1:
The needle cannula is designed with a curved configuration instead of straight, allowing it to navigate anatomical structures more effectively. The curved needle can access the vertebral body through a single pedicular approach while following the natural curvature of the bone, eliminating the need for multiple insertions and reducing the risk of tissue puncture.
Solution Approach 2:
The needle cannula incorporates multiple openings (distal opening and one or more proximal openings) segmented along its length. This segmentation allows bone stabilizing material to be delivered through multiple pathways simultaneously, ensuring complete filling of the vertebral body cavity and preventing material leakage through bone defects.
4Ease of operation
If axial openings at the needle tip are used, then material delivery is straightforward, but material leakage through bone defects occurs
Solution Approach 1:
The needle cannula incorporates multiple openings (distal opening and one or more proximal openings) segmented along its length. This segmentation allows bone stabilizing material to be delivered through multiple pathways simultaneously, ensuring complete filling of the vertebral body cavity and preventing material leakage through bone defects.
Solution Approach 2:
The invention transitions from single-point axial delivery to multi-point distributed delivery along the needle length. By placing openings at multiple positions (distal and proximal), material is delivered through multiple dimensions of the vertebral body, ensuring complete filling and preventing leakage through bone defects.
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 solution reduces operating time, minimizes the need for multiple surgical approaches, and allows for precise delivery of curable materials to various areas within the bone site, enhancing the effectiveness of procedures like vertebroplasty by preventing material leakage and ensuring thorough stabilization of bone structures.
Implementation Method 1
a deflectable segment with shape memory characteristics for improved access and control during procedures
Data Source
AI summary
A curable material delivery cannula device is disclosed. The device includes a cannula and a hub. The cannula includes an open proximal end, a deflectable segment forming a pre-set curve, a lumen, and side orifice(s) adjacent, and proximally spaced from, the distal end and fluidly connected to the lumen. When inserted within a guide cannula, the deflectable segment straightens. When distally extended from the guide cannula, the deflectable segment reverts to the curved shape. The distal end has a blunt tip for non-traumatic interface with bodily material. During use, curable material, such as bone cement, is delivered from the side orifice(s) in a radial direction relative to the lumen. The device may be used to create voids for receiving curable material, and may include spacers configured to control location and/or orientation of the voids.