Tissue Grasping Forceps with Interlocking Jaw and Needle Clamp
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Solution Overview
Problem
Conventional surgical forceps with a single set of jaws struggle to grasp tissue blocks at angles other than parallel to the operating table, and there is no effective method to secure needles during tissue removal, especially in procedures like breast lumpectomy, where the needle can be dislodged during excision.
Innovation Solution
A tissue grasping forceps and needle holder with pivotally connected movable arms, featuring serrated clamp components and regularly spaced tines with central gaps, designed to securely grasp and hold tissue and needles, even at angles, using interlocking teeth and ratchet mechanisms to maintain a closed position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional forceps with a single set of jaws are used, then the structure is simple, but the ability to grasp tissue at various angles is poor
Solution Approach 1:
The forceps is divided into multiple independent working portions (first working portion with first jaw and first clamp, second working portion with second jaw and second clamp), each capable of independent movement and tissue engagement. This segmentation allows each portion to grasp tissue at different angles simultaneously, resolving the contradiction between versatility and structural simplicity.
Solution Approach 2:
The forceps transitions from a single-plane grasping mechanism to a multi-dimensional structure where working portions can move in different planes and orientations. The first and second working portions can engage tissue from different angular directions, adding dimensional capability without excessive complexity.
2Reliability
If conventional forceps with a single set of jaws are used, then the device is simple to operate, but the reliability of securing needles during excision is poor
Solution Approach 1:
The forceps merges two distinct functions into a single instrument: tissue grasping (via jaws) and needle securing (via clamps with serrated teeth). The first clamp and second clamp are integrated into the respective working portions, allowing simultaneous tissue manipulation and needle fixation, thereby improving reliability without requiring separate devices.
Solution Approach 2:
Each working portion is designed with dual functionality: the jaw component for tissue grasping and the clamp component with serrated teeth for needle securing. This multi-functionality ensures that both tissue manipulation and needle fixation can be performed reliably by the same instrument during excision procedures.
3Manufacturing precision
If conventional forceps are used, then the device complexity is low, but the precision of tissue manipulation during excision is poor
Solution Approach 1:
The forceps is segmented into multiple working portions with specialized components (jaws with teeth, clamps with serrated surfaces) that can independently position and secure tissue with high precision. Each segment can be precisely manufactured and positioned, allowing accurate tissue manipulation during excision while maintaining a manageable overall structure.
Data Source
AI summary
A tissue grasping forceps and needle holder. A pair of movable arms are pivotably connected about a pivot connection, with each arm having a handle portion on one side and a working portion on the opposite side of the pivot connection. The working portions interengage when the handle portions are closed to a minimum spaced relation. The working portion has a clamp components and jaw component, with the clamp component comprising a plurality of synchronous teeth located to interlock when the handle portions are in the minimum spaced relation. The jaw component comprises a plurality of regularly spaced tines, with the tines being joined in pairs when the handle portions are in the minimum spaced relation with a gap between the tines, and an interstice between each spaced pair.