Laparoscopic Dissector With Integrated Fluid Dispensing
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Solution Overview
Problem
Current dissector devices for laparoscopic surgery are complex and cumbersome, requiring multiple components and not optimized for reducing surgical intervention and healing times, while also lacking versatility in tissue separation methods.
Innovation Solution
A dissector device with a rod-shaped element featuring an expandable pair of jaws hinged at the distal end, integrated with a dispensing assembly for pressurized fluid, allowing both mechanical and fluid dynamic separation of tissues, and optionally sharp inner edges for scissor-like functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate components are used for mechanical dissection and fluid dispensing, then functional versatility is improved, but device complexity increases
Solution Approach 1:
The patent combines the mechanical dissection function (expandable jaws) and fluid dispensing function (pressurized fluid delivery) into a single integrated rod-shaped element. The fluid channel is incorporated within the rod structure itself, eliminating the need for separate fluid delivery components and reducing overall device complexity while maintaining functional versatility.
Solution Approach 2:
The rod-shaped element serves multiple functions simultaneously: it acts as the structural backbone, contains the fluid channel for pressurized fluid delivery, supports the expandable jaw mechanism for mechanical dissection, and provides the mounting structure for the restraining means. This multi-functionality reduces the number of separate components needed.
2Adaptability or versatility
If expandable jaws are used for mechanical separation, then tissue dissection capability is improved, but device structure becomes more complex
Solution Approach 1:
The expandable jaws are nested within the rod-shaped element structure. The restraining means (pin or pivot) is integrated into the rod structure itself, and the jaws fold or collapse when not in use, allowing them to be stored compactly within the overall device architecture. This nesting approach reduces structural complexity compared to having separate, permanently extended mechanical components.
3Productivity
If pressurized fluid is used for tissue separation, then surgical intervention time is reduced, but fluid delivery system complexity increases
Solution Approach 1:
The patent incorporates a fluid channel directly within the rod-shaped element structure, utilizing hydraulic principles to deliver pressurized fluid to the tissue separation site. This integrated fluid delivery approach eliminates the need for complex external tubing and pumping systems, reducing overall device complexity while maintaining the productivity benefits of pressurized fluid delivery.
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 device simplifies surgical procedures by combining mechanical and fluid dynamic separation, reducing complexity and cost, while enabling quicker, safer, and more versatile tissue dissection with reduced bleeding and vascular damage.
Implementation Method 1
a flow of pressurized gas, for example carbon dioxide... due to the dynamic action of a fluid medium injected therebetween
Implementation Method 2
an expandable balloon is arranged. The expansion of the balloon between the cleavage planes of the tissues causes detachment and separation
Implementation Method 3
a pair of levers hinged to each other at an intermediate position thereof... Detachment and separation of the tissues, i.e. their dissection, is performed by moving the beaks away from each other
Data Source
AI summary
A dissector device having a rod-shaped hollow member, an expandable element with a pair of jaws arranged at a distal end of the rod-shaped member and a grip arranged at a proximal end of the rod-shaped member is provided. The dissector device has dispensing assembly for dispensing a fluid under pressure and has feeding channels and a dispensing channel associated with the jaws of the expandable element. The dispensing channel being has an outlet arranged proximate to or at the free end of the jaw. The feeding channels are arranged in fluid communication with a cavity of the rod-shaped member, whereby a fluid under pressure is fed throughout the cavity of the rod-shaped member in an operating condition of the dissector device.