Nested Surgical Pin for Targeted Intraarticular Injection
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Solution Overview
Problem
Current minimally invasive procedures for sacroiliac joint stabilization face challenges in administering targeted medication due to obstruction by surgical equipment, necessitating an apparatus and method for intraarticular or targeted injection.
Innovation Solution
A surgical apparatus comprising an outer shell and inner pin, which can be configured for insertion and medication injection, allowing for the use of additional surgical instruments as guides, and an adapter for facilitating medication delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a traditional Steinmann pin is used for guidance, then accurate alignment is achieved, but medication administration becomes difficult due to obstruction by surgical equipment
Solution Approach 1:
The inner pin is nested within the outer shell, allowing the device to function as a guide when assembled and as an injection device when the inner pin is removed. This nesting principle enables dual functionality without requiring separate surgical instruments.
Solution Approach 2:
The surgical apparatus is designed to perform multiple functions: it serves as both a guidance device (when inner pin is inserted) and a medication delivery device (when inner pin is removed and adapter is attached). This eliminates the need for multiple separate instruments.
2Measurement precision
If additional surgical instruments are introduced for medication injection, then targeted medication delivery is achieved, but tissue damage and foreign body introduction increase
Solution Approach 1:
The outer shell serves dual purposes as both a guidance structure and a medication delivery conduit. By removing the inner pin and attaching an adapter, the same physical structure enables precise medication injection without requiring additional surgical instruments to be introduced into the anatomical site.
Solution Approach 2:
The inner pin is extracted from the outer shell to convert the device from a guidance-only function to a medication delivery function. This extraction allows the interior channel to be used for injecting medication while minimizing the introduction of foreign bodies into the anatomical area.
3Ease of manufacture
If a single incision is used for the entire procedure, then minimally invasive benefits are achieved, but access to target areas for medication injection is blocked
Solution Approach 1:
The surgical apparatus enables multiple surgical functions (guidance and medication injection) to be performed through a single incision. The outer shell acts as both the guidance structure and the injection conduit, eliminating the need for additional incisions or access points.
Solution Approach 2:
The nested configuration of the inner pin within the outer shell allows the device to be inserted through a single small incision. The inner pin provides guidance while the outer shell provides the injection pathway, both accessible through the same incision site.
Data Source
AI summary
Methods and devices useful for intraarticular or other targeted injection of medication, for example, into an anatomical area. A surgical apparatus may facilitate such injections and may also function as a Steinmann pin or an intramedullary pin. The apparatus may have an outer shell and an inner pin. The inner pin and the outer shell may cooperatively engage to provide a first configuration and a second configuration. In the first configuration the inner pin and the outer shell may be aligned along a longitudinal axis, the inner pin may be disposed within the outer shell, allowing other surgical instruments to slide over the apparatus. In the second configuration the inner pin may be disposed outside of the outer shell and a substance may be injected into the outer shell, for example, via a syringe.