Percutaneous Bone Material Delivery Device for Spinal Surgery
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Solution Overview
Problem
Current methods for delivering bone material during minimally invasive spinal procedures face challenges due to limited access and proximity to nerves, making it difficult to effectively implant bone grafts or substitutes percutaneously.
Innovation Solution
A device comprising a sleeve and plunger mechanism that allows for the percutaneous delivery of bone material to a surgical site, enabling precise deployment of bone grafts or substitutes through small incisions, even in hard-to-reach locations like the spine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If open surgical approach is used to deliver bone material, then direct access to surgical site is achieved, but tissue damage and procedural complexity increase
Solution Approach 1:
The patent uses a percutaneous delivery device as an intermediary tool that transmits bone material through small needle punctures rather than requiring direct surgical exposure. The device includes a delivery needle, inner needle, and bone material reservoir that work together to transport and deposit bone graft through minimal incisions, resolving the contradiction between direct access and tissue damage.
2Object-affected harmful factors
If percutaneous delivery is used to minimize tissue damage, then tissue trauma is reduced, but delivery precision and control deteriorate
Solution Approach 1:
The delivery device is segmented into multiple functional components: an outer needle for percutaneous access, an inner needle for material containment, a reservoir for bone graft storage, and a delivery mechanism. This segmentation allows each component to perform its specific function with precision while maintaining the overall benefit of minimal tissue trauma through percutaneous delivery.
Solution Approach 2:
The patent replaces manual direct placement of bone material with a controlled mechanical delivery system. The device uses a plunger or spring mechanism to propel bone material through the needle assembly, providing precise control over material deposition location and quantity without requiring direct surgical access, thus maintaining delivery precision while minimizing tissue trauma.
3Strength
If metal implants are used to replace injured bone, then mechanical support is restored, but stress shielding and bone density loss occur
Solution Approach 1:
The patent changes the material parameter from metal to bone material (autograft, allograft, or synthetic bone graft). This parameter change allows the implant to provide mechanical support while being biocompatible and osteoconductive, enabling stress transfer to the surrounding bone tissue and preventing stress shielding. The bone material gradually integrates with host bone, maintaining physiological stress distribution.
4Ease of operation
If bone material is delivered through large incisions, then adequate access for implantation is achieved, but procedural complexity and recovery time increase
Solution Approach 1:
The percutaneous delivery device serves as an intermediary that enables bone material implantation through small needle punctures rather than large incisions. The device includes a delivery needle, inner needle, and bone material reservoir that work together to transport and deposit bone graft through minimal incisions, resolving the contradiction between direct access and tissue damage.
Data Source
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AI summary
A device for delivering a bone material to a surgical site is provided. The device comprises a body having an upper portion and a lower portion. The lower portion of the body is substantially transverse to the upper portion and has an opening for receiving a bone material. An internal chamber is disposed within the upper portion and the lower portion, and a plunger is slidably disposed in at least the internal chamber of the body. The plunger has a distal end configured for delivering the bone material out of the lower portion of the body, wherein movement of the plunger in a first position toward the lower portion of the body delivers the bone material from the lower portion of the body to the surgical site. Methods of delivering the bone material are also provided.