Stapler Flex Cable Tensioning to Prevent Articulation Herniation
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Solution Overview
Problem
Powered surgical stapling devices experience flex cable herniation due to articulation, leading to potential damage and disruption of real-time feedback communication between sensors and the processor.
Innovation Solution
A tensioner mechanism is integrated within the adapter assembly to maintain tension in the flex cable, using a sled and biasing member to prevent herniation during articulation of the tool assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the tool assembly is made pivotable to enable articulation, then the adaptability and versatility of the surgical device is improved, but the flex cable tends to herniate into the joint formed by the pivot member causing damage
Solution Approach 1:
A tensioner mechanism is introduced as an intermediary component between the flex cable and the pivot joint. This tensioner maintains continuous tension on the flex cable, preventing it from herniating into the joint during articulation movements. The tensioner acts as a mediator that allows the pivotable connection to function while protecting the flex cable from damage.
Solution Approach 2:
The tensioner mechanism applies preliminary tension to the flex cable before articulation occurs. By maintaining pre-tension on the cable, the system prevents the cable from sagging or herniating into the joint when the tool assembly articulates, thus protecting the cable integrity in advance of potential damage.
2Measurement precision
If sensors are located in the distal portion of the device to provide real-time feedback, then the measurement precision and control capability are improved, but the flex cable connecting sensors to the processor becomes susceptible to herniation and damage
Solution Approach 1:
The tensioner mechanism serves as an intermediary protective device that safeguards the flex cable connecting the distal sensors to the proximal processor. By maintaining tension on the cable throughout its length, the tensioner prevents herniation at critical points, thereby protecting the communication link between sensors and processor while allowing precise real-time feedback functionality.
3Ease of operation
If the flex cable is made flexible to accommodate articulation movement, then the ease of operation is improved, but the likelihood of herniation and damage to the flex cable increases
Solution Approach 1:
The tensioner mechanism acts as an intermediary that maintains controlled tension on the flexible cable during articulation. This allows the cable to remain flexible enough to accommodate movement while preventing it from herniating into the joint, thus protecting the cable integrity while maintaining ease of operation.
Solution Approach 2:
The tensioner mechanism dynamically adjusts the tension parameter of the flex cable during articulation. By maintaining appropriate tension levels, the system allows the cable to flex and accommodate movement when needed while preventing excessive sagging that would cause herniation, thus balancing flexibility with integrity.
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
The tensioner mechanism effectively maintains flex cable tension, preventing herniation and ensuring continuous real-time feedback communication between sensors and the processor, enhancing the reliability and performance of the surgical stapling device.
Implementation Method 1
a biasing member positioned to urge the sled towards the second position
Data Source
Figure 1
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AI summary
A surgical device includes an adapter assembly, a tool assembly supported on a distal portion of the adapter assembly, sensors supported on the tool assembly, a flex cable that is coupled to the sensors and extends from the tool assembly through the adapter assembly, and a tensioner mechanism that is engaged with the flex cable within the adapter assembly to maintain tension in the flex cable.