Stereotactic Needle Placement Device for Respiratory Motion
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Solution Overview
Problem
Current stereotactic needle placement devices are not compatible with CT and MRI imaging techniques and are limited to use in specific body parts, such as the brain, making precise needle placement challenging, especially in areas affected by respiratory movements, leading to potential damage to vital organs and tissues.
Innovation Solution
A CT and MRI compatible image-guided whole body stereotactic needle placement device with a base plate, rotating needle holder, arc, needle guide, and sizing tube, allowing precise placement of needles or medical devices in any body part, including those that move with respiration, using fiducial markers and software for accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing stereotactic devices are used for brain interventions, then precise needle placement in the brain is achieved, but the device cannot be used for other body parts
Solution Approach 1:
The device is designed with a universal base plate that can be attached to any body part, making it applicable for needle placement in the brain, thorax, abdomen, and other body parts. The base plate includes attachment means that can be secured to different anatomical locations, allowing the same device to function across multiple body regions while maintaining precise needle placement capability.
2Measurement precision
If multiple needle placement attempts are made to reach the precise point, then the needle may reach the target, but serious life threatening complications occur from internal bleeding and damage to vital organs
Solution Approach 1:
The device allows pre-planning of the needle trajectory using imaging techniques (CT, MRI, ultrasound) before actual needle insertion. The base plate is attached to the body and the needle guide is positioned to define the precise entry point and trajectory on the skin surface before needle insertion, enabling the procedure to be performed in a single attempt and avoiding multiple trials that could cause organ damage.
3Ease of operation
If free hand needle insertion is used, then the procedure is simple, but precise needle placement at the desired point cannot be achieved
Solution Approach 1:
The device introduces a needle guide as an intermediary component between the operator and the patient's body. The needle guide is attached to the base plate which is secured to the body, and it provides a physical guide that constrains the needle to follow a pre-determined trajectory. This intermediary structure simplifies the insertion process by providing a ready-made pathway while ensuring precise needle placement at the target location.
4Adaptability or versatility
If needle placement is performed in body parts affected by respiratory movement, then interventions in moving tissues are possible, but precise positioning becomes challenging
Solution Approach 1:
The device is designed to be adaptable to dynamic conditions in body parts affected by respiratory movement. The base plate can be attached to the chest or abdominal wall, and the needle guide can be positioned to account for tissue movement during breathing. The device allows the operator to plan the trajectory considering the dynamic nature of the tissue, enabling precise needle placement even in moving body parts.
Data Source
AI summary
The invention provides a an image guided whole body stereotactic needle placement device, for inserting needles or any such medical devices at a desired precise point in a body. The device is used under image guidance obtained from cross sectional imaging by Computerized Tomography and Magnetic Resonance Imaging.The device has a circular base plate, a semicircular rotating arc that rotates on the base plate, a needle guide that guides the needle placed in a needle sizing tube, a needle guide cover, and a locking pin that locks the needle guide cover to the needle guide.The device enables immediate detachment of the needle from the device enabling use also in body parts that move with respiration. The device is light weight and small with fixation mechanism to the body such that it can also be used even in newly born.