Prosthesis Implantation Device with Ratchet Positioning and Fluid Isolation
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Solution Overview
Problem
Existing devices for implanting liquid-absorbing prostheses lack precise positioning, risk incomplete or premature release of prostheses, fail to isolate prostheses during insertion, and complicate surgical procedures due to inadequate tissue penetration and fluid isolation.
Innovation Solution
A device featuring a cartridge with a tubular element and pressure element, where the pressure element is designed to push the prosthesis through a tapered opening, preventing tissue and fluid entry, and motorized mechanisms ensure precise alignment and controlled release, with a locking mechanism to prevent premature prosthesis release and facilitate easy tissue insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the hollow member is retreated with respect to the pusher element to release the prosthesis, then the prosthesis exits the hollow member, but the hollow member may not be retreated enough causing incomplete release or overly retreated causing premature release of successive prosthesis
Solution Approach 1:
The patent employs a ratchet mechanism that provides mechanical feedback through audible clicks and tactile resistance, allowing the operator to sense when the hollow member has retreated the correct distance. The ratchet engages at predetermined intervals to prevent over-retreat, providing real-time feedback on the positioning status without requiring complex electronic sensors.
Solution Approach 2:
The ratchet mechanism automatically prevents over-retreat of the hollow member by mechanically blocking further movement once the predetermined distance is reached. This self-regulating feature eliminates the need for external monitoring systems or complex control algorithms, allowing the device to self-correct positioning errors.
2Ease of operation
If the hollow member is used to insert the prosthesis into the body tissue, then the prosthesis can be delivered to the target location, but body fluids and tissue fragments may enter the hollow member and contact the prosthesis causing swelling and occlusion
Solution Approach 1:
The device is divided into two distinct segments: a reusable hollow member for tissue insertion and a disposable cartridge containing the prosthesis. This segmentation allows the hollow member to be used for tissue penetration while the sterile cartridge remains isolated until the moment of prosthesis delivery, preventing fluid contamination of the prosthesis during the insertion process.
Solution Approach 2:
The cartridge acts as an intermediary component that bridges the sterile prosthesis and the non-sterile hollow member. The cartridge's sealed design protects the prosthesis from body fluids during insertion, while its tapered opening allows controlled delivery of the prosthesis into the tissue without direct exposure to contaminants.
3Adaptability or versatility
If a hollow conformation of the terminal portion is used to penetrate body tissue, then the prosthesis insertion channel can be created, but the tubular body interior cannot be isolated from blood and organic liquid
Solution Approach 1:
The device separates the tissue penetration function (hollow member with pointed terminal) from the prosthesis containment function (sealed cartridge). This segmentation allows the hollow member to effectively penetrate tissue while the cartridge maintains fluid isolation of the prosthesis until delivery, solving the contradiction between penetration capability and fluid isolation.
4Manufacturing precision
If the prosthesis is pushed through the tubular element after insertion, then complete release can be achieved, but the tapered opening may cause resistance and difficulty in sliding
Solution Approach 1:
The cartridge is pre-loaded with the prosthesis in a sterile environment before insertion. This preliminary preparation ensures the prosthesis is positioned correctly and the cartridge is sealed, eliminating the need to manipulate the prosthesis inside the hollow member after insertion and reducing friction resistance during 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 enables precise and complete placement of prostheses, reduces the risk of incomplete or premature release, isolates the prosthesis during insertion, and simplifies surgical procedures by ensuring accurate positioning and minimizing contact with body fluids, thereby improving surgical efficiency and reducing infection risk.
Implementation Method 1
the material constituting it absorbs the body liquids, causing a swelling of the prosthesis itself
Data Source
Figure 1
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AI summary
A device for implanting a prosthesis 12 in a body tissue equipped with a tubular element 7, within which a prosthesis 12 can slide, and a pressure element 16 for moving said prosthesis 12. The device also comprises a cartridge 5 provided with a seat 31 at its interior, such seat housing the prosthesis 12 and movable under the action of a pusher element 13 from a first position, in which the seat 31 is not facing the tubular element 7, to a second position, in which the seat 31 is in communication with the tubular element 7 in order to allow the insertion of the prosthesis 12 inside the tubular element 7 upon command of the pressure element 16.