Puncturing Guide With Rotational Center At Skin Entrance Point
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Solution Overview
Problem
Existing medical guiding devices for puncturing instruments, such as biopsy needles, require two separate operations to set the direction and angle, leading to a variable entrance point, making it difficult to position the distal tip at the puncturing point in a single operation without changing the entrance point.
Innovation Solution
A puncturing guide with a needle guide movable around a point coinciding with the defined puncturing entrance point, allowing the tip to be positioned first and the entrance angle set independently without moving the entrance point, using a base plate with a semi-sphere and bayonet coupling to secure the needle guide, ensuring the rotational center is at the skin surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional guiding device is used with separate adjustment operations for elevation angle and rotation, then the device can be operated with simple components, but the entrance point varies and requires two separate operations to set direction and angle
Solution Approach 1:
The patent combines the elevation angle adjustment and rotation functions into a single integrated guiding device. The needle guide is movable around a point coinciding with the puncturing entrance point, allowing both directional and angular adjustments to be made in one operation without changing the entrance point, thus merging two separate operations into one.
Solution Approach 2:
The needle guide is designed to be dynamically adjustable around the entrance point while maintaining the entrance point as the rotational center. This dynamic capability allows the device to adapt to different puncturing angles and directions without requiring multiple fixed positions or separate adjustment operations.
2Manufacturing precision
If the rotational center is not located at the entrance point, then the device structure can be simpler, but it is not possible to position the distal tip at the puncturing point and then set the entrance angle without changing the entrance point
Solution Approach 1:
The guiding device is designed so that the entrance point itself serves as the rotational center for the needle guide. This self-service design allows the device to automatically maintain the correct geometric relationship between the entrance point and the needle tip during angle adjustments, eliminating the need for complex external reference systems or additional adjustment mechanisms.
3Productivity
If two separate operations are used to set direction and angle, then each operation can be optimized independently, but the overall procedure becomes more time-consuming and the entrance point varies
Solution Approach 1:
The device is pre-configured with the entrance point as the rotational center, allowing the operator to perform all necessary adjustments (both directional and angular) in a single operation. This preliminary configuration eliminates the need for subsequent adjustment operations, reducing the overall procedure time and maintaining consistent entrance point positioning.
Data Source
AI summary
The invention provides a puncturing guide (1, 16) for guiding a puncturing needle into a target site within the body of a patient. The puncturing guide (1, 16) comprises a base plate (2, 17), a needle guide (3, 18), a retainer (4, 19) for securing the needle guide (3, 18) to the base plate (2, 17), a first segment (7, 20) of a first semi-sphere, a second segment (8, 21) of a second semi-sphere, and a needle guide (3, 18) attached to the second segment (8, 21). During a positioning operation, the second segment (8, 21) slides on the first segment (7, 20), so that the needle guide (3, 18) is movable around the center of the first semi-sphere, which is in level with the underside of the base plate (2, 17), thereby providing the possibility to position the tip of a puncturing needle at a puncturing point on the patient's skin and then, in a separate operation, set the entrance angle of the puncturing needle without changing its entrance point.