Biopsy Device Tip with Triple Concave Curvature
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Solution Overview
Problem
Existing electrosurgical biopsy devices are not always suitable for proper placement and are incompatible with magnetic resonance imaging, limiting their effectiveness in accessing and removing tissue specimens, especially in subcutaneous sites like the human breast.
Innovation Solution
A tissue accessing and severing device with an elongated probe component featuring a tissue-cutting member that includes a distal shaft with a penetrating tip, a tubular section, and a cutting edge for longitudinal or oscillating motion, combined with a driver component for precise control and vacuum-assisted specimen collection, allowing for precise tissue specimen removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrosurgical biopsy devices are used to access intracorporeal sites, then tissue can be effectively removed, but the devices are incompatible with magnetic resonance imaging
Solution Approach 1:
The patent removes the electrosurgical cutting mechanism from the biopsy device, extracting the incompatible element while preserving the core biopsy function. The device now uses mechanical cutting edges on the distal tip instead of electrosurgical energy, eliminating MRI incompatibility while maintaining tissue removal capability
Solution Approach 2:
The redesigned biopsy device achieves universality by being compatible with multiple imaging modalities including MRI, ultrasound, and X-ray. The device incorporates imaging-compatible materials and design features that allow it to function across different imaging environments without requiring modality-specific variations
2Ease of operation
If prior needle like tips are used for accessing intracorporeal sites, then insertion is simplified, but proper placement is not always achieved
Solution Approach 1:
The patent applies local quality by creating a distal tip with specialized geometry and properties different from the shaft. The distal tip features a specific shape with cutting edges oriented at particular angles, providing enhanced tissue penetration and placement control at the critical insertion point while maintaining simplicity in the shaft portion
Solution Approach 2:
The device incorporates preliminary action through pre-configured cutting edges and aperture positioning on the distal tip. The cutting edges are pre-oriented to engage tissue at specific angles during insertion, and the aperture is pre-positioned to ensure proper alignment with the target site before full insertion is complete
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 device enables precise access and removal of tissue specimens from targeted sites within the body, facilitating pathological examination while being compatible with various imaging modalities, including MRI, by providing controlled cutting and specimen collection mechanisms.
Implementation Method 1
it is preferred to provide a vacuum within the cutting member from the proximal end of the cutting member. The proximal end of the cutting member may be configured to be in fluid communication with a vacuum source to aspirate the severed tissue specimen through the inner lumen of the cutting member
Data Source
AI summary
The invention is directed to a system and device for separating and collecting a tissue specimen from a target site within a patient. The device includes a probe component which is releasably secured to the driver component. The probe component has an elongated tubular section, a penetrating distal tip and a tissue receiving aperture in the distal end of the tubular section proximal to the distal tip, and a tissue cutting member which is slidably disposed within the probe member to cut a tissue specimen drawn into the interior of the device through the aperture by applying a vacuum to the inner lumen of the tissue cutting member. The driver has drive members for operating the elements of the probe component. The tissue penetrating distal tip preferably has a triple concave curvature shape with three curved cutting edges leading to a sharp distal point.