Passive Double Drive Blood Collection Needle Shielding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current blood collection systems lack effective protection against accidental needle stick injuries due to inadequate shielding mechanisms, which increases the risk of infection and disease transmission.
Innovation Solution
A shieldable needle device featuring two separate drive members that extend from a folded biased position to an extended position, moving a tip guard from a proximal to a distal position to securely shield the needle cannula, providing enhanced protection by surrounding a greater area of the needle and reducing exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single drive member is used to move the tip guard, then the device structure is simpler, but the shielding reliability is insufficient
Solution Approach 1:
The drive mechanism is segmented into two separate drive members (first drive member and second drive member) that independently extend to move the tip guard. This segmentation provides redundant actuation paths, ensuring that if one drive member fails to extend, the other can still activate the shielding mechanism, thereby improving reliability without excessive complexity
Solution Approach 2:
Each drive member is equipped with its own retention mechanism (first retention mechanism and second retention mechanism) that engages with the wing assembly at different locations. This local differentiation ensures that the shielding activation can occur from multiple points, enhancing the overall reliability of the shielding system
2Object-affected harmful factors
If the tip guard only covers the distal end of the needle cannula, then the device structure is simpler, but the protection area is insufficient
Solution Approach 1:
The tip guard is designed to extend not only distally to cover the needle tip but also laterally to cover the sides of the needle cannula. This multi-dimensional coverage transforms the protection from a simple distal cap to a comprehensive shield that addresses needle stick risks from multiple directions, significantly reducing the harmful factors without requiring multiple separate components
3Ease of operation
If the drive members are retained in the extended position, then the needle is always shielded, but the ease of operation is reduced
Solution Approach 1:
The drive members are designed with dynamic retention mechanisms that can transition between extended and retracted states based on wing assembly position. During normal use, the drive members remain retracted for easy operation. Upon wing release, they automatically extend to provide shielding. This dynamic behavior ensures the device remains easy to operate while maintaining reliability when needed
Solution Approach 2:
The drive members are spring-loaded or elastically biased to automatically extend when the retention mechanisms are released by the wing assembly. This self-service mechanism eliminates the need for manual activation of the shielding, improving ease of operation while ensuring reliable automatic protection deployment
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 consistently and effectively shields the needle cannula, significantly reducing the risk of accidental needle stick injuries by ensuring complete coverage and providing additional side shielding, thus enhancing safety during and after use.
Implementation Method 1
the first drive member and the second drive member are each extendable between a folded biased position and an extended position
Data Source
AI summary
A shieldable needle device including a drive member is disclosed. The drive member is extendable between a biased position and an extended position for moving a tip guard from an first position to a second position in which the tip guard shields a distal end of the needle cannula. The shieldable needle device includes a pair of wings extending laterally from opposing sides of the hub that are movable between a laterally extending position and a dorsal position. With the wings in the dorsal position, the wings retain the drive member in the biased position thereby maintaining the tip guard in the first position. Movement of the wings from the dorsal position to the laterally extending position releases retainment of the drive member. A second drive member may be included.