Break-away Washer for Sacroiliac Joint Stabilization
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Solution Overview
Problem
Current surgical methods for stabilizing the sacroiliac joint are inefficient, often requiring extensive exposure and dissection, leading to longer surgical times, increased risk of infection, and inconsistent fusion, which can result in further instability and failed surgeries.
Innovation Solution
The development of a break-away washer and hybrid washer tower for posterior surgical stabilization of the sacroiliac joint, allowing for secure and consistent fusion through a minimally invasive approach, using a method that includes creating an incision, marking an implant site, dilating the area, and inserting a fusion implant with guidance tabs that break away post-implantation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional surgical methods are used for sacroiliac joint stabilization, then the joint can be accessed and stabilized, but extensive surgical exposure and dissection are required, leading to longer surgical times and increased risk of infection
Solution Approach 1:
The surgical approach is segmented into distinct phases: initial exposure through limited incision, implant insertion through the exposure device, and closure. The exposure device itself is segmented with separate components including the body, cap, and implant, allowing for modular insertion and removal while maintaining minimal exposure throughout the procedure.
2Reliability
If traditional surgical methods are used for sacroiliac joint stabilization, then the joint can be accessed and stabilized, but extensive surgical exposure and dissection are required, leading to increased risk of infection and wound complications
Solution Approach 1:
The exposure device is designed with a cap that can be placed over the implant to protect the surgical site and prevent contamination during the procedure. The limited exposure approach inherently cushions the wound from harmful factors by minimizing the open area exposed to the environment.
3Reliability
If traditional posterior iliac screws are used, then the sacroiliac joint can be stabilized, but the hardware is prominent and painful for patients, and at risk for pressure soreness
Solution Approach 1:
The implant is designed with specific local qualities including a smooth surface finish and appropriate dimensions that allow it to be seated within the sacroiliac joint without protruding through the skin. The exposure device ensures proper positioning of the implant at a depth that provides stabilization while eliminating the prominence and associated discomfort of traditional screws.
4Reliability
If current instrumentation systems are used, then the sacroiliac joint can be stabilized, but the systems are designed for other applications and not for connecting and stabilizing the lumbar spine and pelvis, making surgical times longer and more frustrating
Solution Approach 1:
The exposure device and implant system are designed with universal features that allow for efficient connection and stabilization of the lumbar spine and pelvis. The device includes a body and cap structure that can accommodate various implant types, and the standardized interface allows for quick insertion and removal, making the surgical process more efficient and less frustrating for surgeons and staff.
Data Source
AI summary
A break-away washer is provided that includes a washer ring, with a first surface and a second surface configured to couple with the body of a fusion implant, positioned at a distal end of the washer. The washer includes at least one lateral tang extending distally from the first surface to engage an area surrounding an implant site and stabilize the washer. The washer also includes at least one guidance tab affixed to the second surface of the washer ring that extends proximally to define a semi-enclosed, columnar structure. Furthermore, the washer includes at least one corresponding break-away connection point that extends proximally from the second surface to couple the guidance tab to the washer ring. Each of the break-away connection points may be separated from the washer ring following implantation to enable removal of each guidance tab while leaving the washer ring positioned at the implant site.