Robotic Surgical Drive Unit Flex Spool Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Robotic surgical systems face limitations in the degrees of rotation of their instrument drive units, which can result in damage to internal circuitry and increased resistance, and lack effective feedback mechanisms for operating room staff regarding the status of the instrument drive units.
Innovation Solution
The instrument drive unit incorporates a flex spool assembly with a motor assembly and printed circuit boards, allowing for increased rotation without damaging internal components, and includes visual indicators for status feedback through a translucent housing and annular array of visual indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a robotic surgical system is designed to be highly automated with computer-controlled instruments, then surgical precision and consistency are improved, but system complexity and difficulty of operation increase
Solution Approach 1:
The robotic surgical system is divided into separate modular components including the robotic arm, instrument drive unit, fire mechanism, and control system. Each module can be independently controlled and maintained, reducing overall system complexity while preserving surgical precision through coordinated operation of segments.
Solution Approach 2:
A computer control system acts as an intermediary between the surgeon's inputs and the robotic instruments. This intermediary processes commands, coordinates multiple degrees of freedom, and ensures precise instrument positioning, thereby improving surgical precision without requiring the surgeon to directly manage complex mechanical systems.
2Adaptability or versatility
If robotic instruments are designed with multiple degrees of freedom for complex surgical tasks, then surgical versatility is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The robotic instrument drive unit is designed with universal capabilities to accommodate multiple instrument types and surgical tasks through a standardized interface. The fire mechanism and drive system can operate different instruments (scissors, clamps, staplers) with the same control architecture, providing surgical versatility without increasing individual instrument complexity.
Solution Approach 2:
The robotic system employs dynamic control where the computer adjusts instrument positioning, speed, and force in real-time based on surgical conditions. This dynamic adaptation allows the system to handle complex surgical tasks with varying requirements while maintaining manageable operation through automated adjustment of multiple degrees of freedom.
3Ease of operation
If the fire mechanism is integrated into the robotic instrument rather than being separate, then ease of operation is improved, but reliability may worsen due to increased integration complexity
Solution Approach 1:
The fire mechanism is integrated into the robotic instrument tip along with the drive shaft and cutting element. This merging eliminates the need for separate firing mechanisms and manual intervention, improving ease of operation by allowing automated firing through the existing drive system while maintaining reliability through coordinated control of all components as a unified assembly.
Data Source
AI summary
An instrument drive unit includes a housing configured to be coupled to a surgical robotic arm, a motor assembly, and a flex spool assembly. The motor assembly is rotatably disposed within the housing. The flex spool assembly includes a first printed circuit board mounted to the housing, a second printed circuit board configured to be non-rotatably coupled to and electrically connected to the motor assembly, and a first flex circuit. The first flex circuit has a first end portion connected to the first printed circuit board, a second end portion connected to the second printed circuit board, and an intermediate portion coiled about the second printed circuit board such that rotation of the motor assembly relative to the housing effects movement of the second end portion of the first flex circuit along an annular path.