Perforating Trocar With Segmented Helical Tube And Rotating Drill Tip
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Solution Overview
Problem
Existing perforating trocars are ineffective in penetrating hard bone surfaces, requiring difficult manual operation to rotate a drill-bit style rod while holding a tube, leading to inefficient and laborious procedures in bone biopsies and other skeletal interventions.
Innovation Solution
A perforating trocar design featuring a rigid tube with a distal end divided into two segments having helical cutting edges and a perforating drill-bit tip that can rotate, allowing for easy one-handed operation and efficient penetration of hard surfaces by combining the cutting edges and drill-bit functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional cutting tool is used to penetrate hard bone, then the tool structure is simple, but the penetration effectiveness is insufficient
Solution Approach 1:
The patent combines the drill-bit rod and cutting-edge tube into a single integrated trocar assembly that rotates together as one unit. This merging eliminates the need for separate manual rotation of the rod while holding the tube, significantly reducing operator difficulty while maintaining effective bone penetration through the combined cutting action of both components
2Reliability
If a drill-bit rod is used to perforate bone, then penetration capability improves, but operation complexity increases
Solution Approach 1:
The patent merges the drill-bit rod and tube into a unified rotating assembly where both components are mechanically coupled to rotate together. This integration simplifies the operation procedure from managing separate rotating components to controlling a single unified tool, reducing operational complexity while preserving the effective perforation capability of the drill-bit design
3Productivity
If a rigid tube with helical cutting edges is used, then cutting efficiency improves, but the ability to penetrate very hard bone is insufficient
Solution Approach 1:
The patent combines helical cutting edges on the tube with a drill-bit tip on the rod into a single integrated system. The helical cutting edges provide efficient material removal and cutting action, while the drill-bit geometry concentrates force for initial penetration into very hard bone. Together, they achieve both high cutting efficiency and reliable penetration of dense skeletal tissue
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
Enables effective and safe perforation of hard bone surfaces with reduced operator effort, facilitating procedures like bone biopsies, vertebroplasty, and treatment of bone lesions, while allowing for easy tool exchange post-perforation.
Implementation Method 1
the distal end of the tube is divided into at least two segments with a helical cutting edge
Implementation Method 2
the zone of the distal tip of the rod has the form of a perforating drill-bit that is able to turn on its axis
Data Source
AI summary
The invention concerns the field of surgical instruments. The inventive trocar (1) is of the type comprising a rigid tube (2) wherein may slide a rod (3) with a perforating distal tip, and it is characterized in the distal tip zone of the rod forms a perforating drill capable of rotating on its axis while the distal end of the tube is divided into at least two segments (10, 11), with helical cutting edge. The invention is applicable in particular to bone biopsy.