Retractable Scalpel Sheath and Latch Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional scalpels with stationary blades pose a hazard in surgical environments, leading to injuries and potential transmission of infectious agents like HIV, hepatitis B, and hepatitis C, as they require handling by multiple personnel and cannot be safely passed or stored without exposing the blade.
Innovation Solution
A retractable scalpel design featuring a sheath member, a retractable member that moves longitudinally between exposed and guarded positions, and a latch mechanism with a release button, allowing the blade to be safely concealed during handling and storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stationary blade is used in a scalpel, then the blade can perform cutting functions, but the blade remains exposed creating injury hazards to personnel
Solution Approach 1:
The blade is nested within a retractable member that can be inserted into a sheath member, allowing the sharp element to be contained within a protective housing when not in use, thereby eliminating exposure hazards while maintaining cutting functionality when deployed
Solution Approach 2:
The blade transitions from a stationary exposed state to a retractable dynamic system where the blade can be extended for use and retracted into the sheath for safety, allowing the system to adapt between operational and safe states
2Reliability
If a retractable blade mechanism is added to the scalpel, then injury hazards are reduced, but device complexity increases
Solution Approach 1:
The scalpel is divided into separate functional components: a sheath member for protection, a retractable member for blade deployment, and a latch mechanism for securing positions. This segmentation allows each component to perform its specific function with simple structure, reducing overall complexity compared to a monolithic design
Solution Approach 2:
A latch member acts as an intermediary mechanism between the retractable member and sheath, providing a simple locking interface that secures the blade in either extended or retracted position without requiring complex actuation systems
3Productivity
If the blade is always exposed for use, then cutting operations can be performed quickly, but the risk of accidental puncture and infectious transmission increases
Solution Approach 1:
The blade is pre-loaded within the retractable member inside the sheath, ready for immediate deployment when needed. The preliminary preparation of having the blade concealed yet accessible allows for rapid extension during surgery while maintaining safety during handling and storage phases
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 retractable scalpel significantly reduces the risk of injuries and infectious transmission by allowing the blade to be safely guarded during handling and storage, potentially preventing up to 65% of scalpel-related injuries.
Implementation Method 1
a biasing member disposed longitudinally within the retractable member
Data Source
AI summary
A retractable device includes a sheath member having an interior space; a retractable member disposed in the interior space of the sheath member and moveable longitudinally between an exposed position and a guarded position relative to the sheath member; a biasing member disposed longitudinally within the retractable member; and a latch member that locks the retractable member relative to the sheath member in the guarded position. In such circumstances, the latch member includes a release button extending through both the retractable and the sheath members. The retractable member is movable from the exposed position to the guarded position in response to the release button being pushed by a user.