Rotary Medical Puncture Device with Dynamic Shield
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Solution Overview
Problem
There is a need for a medical puncturing device that ensures sterility before use and safe, secure disposal after use, with a requirement for a simple, inexpensive, reliable, self-activating, and disposable device for consistent and controlled production of puncture wounds or incisions for blood sample collection.
Innovation Solution
A medical puncturing device comprising an actuator with a release element, a shield, and a skin puncturing assembly where the actuator and shield are movably associated, allowing the carrier to move from a retracted position to a puncturing position upon relative movement, ensuring the skin puncturing element is exposed for use and then safely retracted for protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the needle or blade is exposed for use, then the device can perform its puncturing function, but the risk of wounding the user or another person increases
Solution Approach 1:
The shield is designed to move dynamically between extended and retracted positions. When the carrier moves to the puncturing position, the shield retracts to allow the skin puncturing element to be exposed for use. After use, the shield extends to cover and protect the element. This dynamic positioning resolves the contradiction by making the harmful factor (exposed needle) controllable rather than static.
Solution Approach 2:
The shield acts as an intermediary between the skin puncturing element and the user. It provides a protective barrier that can be positioned to either protect or expose the sharp element as needed. This intermediary structure allows the device to maintain safety while enabling functional use.
2Reliability
If the device is designed for single use and disposal, then disease transmission is eliminated, but device complexity and cost increase
Solution Approach 1:
The device is segmented into distinct functional components: the actuator, the shield, and the carrier with skin puncturing element. This segmentation allows each component to be independently designed for its specific function and enables complete disposal of all components after a single use, ensuring reliability while keeping individual component complexity manageable.
Solution Approach 2:
The entire device is designed as a disposable unit that can be manufactured at low cost and discarded after single use. This eliminates the need for complex sterilization and disposal mechanisms for reusable components, as the entire device becomes a single-use, low-cost item that prevents disease transmission through complete replacement.
3Object-affected harmful factors
If the carrier is held in retracted position by interference engagement, then safety is maintained, but the mechanism for releasing requires additional components
Solution Approach 1:
The interference engagement between the carrier and shield creates a dynamic locking mechanism. The carrier is held in the retracted position through geometric interference features that prevent movement. When the actuator applies force, the carrier rotates, changing the engagement geometry and allowing the carrier to move to the puncturing position. This dynamic engagement provides safety without requiring separate locking components.
Solution Approach 2:
The safety locking function is merged with the structural engagement features between the carrier and shield. The same geometric features that provide structural support also create the interference engagement that holds the carrier in the safe retracted position. This merging eliminates the need for separate safety locking 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
The device ensures sterility before use, facilitates safe and secure disposal, and provides consistent and controlled puncture wounds, enhancing user safety and reducing the risk of disease transmission.
Implementation Method 1
a drive spring adapted to move the carrier from the retracted position to the puncturing position
Implementation Method 2
a drive spring adapted to move the carrier from the retracted position to the puncturing position
Data Source
AI summary
The medical puncturing device includes an actuator, a shield, and a skin puncturing assembly. The actuator and shield are movable relative to one another. The skin-puncturing assembly includes a carrier and a skin-puncturing element. A distal end of the skin puncturing element is adapted for puncturing the skin of a patient. The carrier is movable from a retracted position wherein the distal end of the skin-puncturing element is disposed within the shield to a puncturing position wherein the distal end of the skin-puncturing element is exposed to puncture the skin of a patient. The carrier is maintained in the retracted position by interference engagement between the carrier and shield. A drive spring is provided to move the carrier from the retracted to puncturing positions. A retraction spring is provided to return the carrier to a position wherein the shield encompasses the skin puncturing element.