Load Cell Suture Tensioning for Precise Force Control
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Solution Overview
Problem
Existing suture tensioning methods are inadequate for precise control and real-time adjustment, particularly in minimally invasive heart valve repair procedures, leading to potential suture rupture and suboptimal implant placement.
Innovation Solution
A suture-tensioning device comprising an elongate plunger, plunger track housing, and actuator, with a load cell for tension force measurement, allowing for precise adjustment of suture tension through axial translation and rotation of the plunger within the track housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing suture tensioning methods are used, then the procedure can be performed, but precise control and real-time adjustment of suture tension are inadequate
Solution Approach 1:
The patent incorporates a load cell that provides real-time feedback on suture tension forces. This feedback mechanism enables precise measurement and control of tension, allowing the operator to adjust the plunger to achieve and maintain optimal suture tension while avoiding excessive force that could cause rupture.
Solution Approach 2:
The patent replaces traditional mechanical suture tensioning methods with a more sophisticated system combining a load cell for force measurement, a plunger for controlled displacement, and an actuator for automated or assisted adjustment. This substitution enables precise digital control and monitoring of suture tension.
2Ease of operation
If existing suture tensioning methods are used, then the procedure can be performed, but real-time adjustment capability is insufficient
Solution Approach 1:
The patent employs a dynamic system where the plunger can be adjusted in real-time through axial translation and rotation. The actuator enables continuous adjustment of suture tension during the procedure, allowing the operator to adapt to changing conditions and achieve precise implant placement.
Solution Approach 2:
The plunger acts as an intermediary mechanism between the actuator and the suture. By translating axial movement and rotation into controlled suture tension adjustment, the plunger enables precise real-time control while protecting the suture from direct manipulation that could cause damage.
3Measurement precision
If a suture-tensioning device with load cell and actuator is used, then precise suture tensioning and real-time monitoring are achieved, but device complexity increases
Solution Approach 1:
The patent merges multiple functions into an integrated device: the load cell measures tension, the plunger provides mechanical advantage for adjustment, and the actuator enables controlled movement. This consolidation of measurement and actuation functions into a single device reduces the number of separate components and simplifies the overall system.
Solution Approach 2:
The plunger serves multiple functions: it transmits actuator movement to adjust suture tension, it provides a mechanical interface for the load cell to measure force, and it acts as a constraint to control the suture's position. This multi-functionality reduces the need for separate dedicated components.
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 precise suture tensioning, reducing the risk of rupture and ensuring proper implant placement, while allowing real-time monitoring and minimally invasive procedures, thereby improving surgical outcomes.
Implementation Method 1
The tensioning device may further comprise a load cell device configured to generate signals indicative of an amount of tension force applied to a portion of the plunger
Implementation Method 2
the plunger includes radially-projecting screw threads and the actuator includes screw threads configured to mate with the screw threads of the plunger
Data Source
AI summary
A tensioning device includes an elongate plunger, a plunger track housing configured to receive the plunger therein at least in part, an elongate tube configured to be coupled to the plunger track housing, and an actuator configured to cause axial translation of at least a portion of the plunger within the plunger track housing.