Dispensing Syringe Plunger With Stylet Passageway
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current dispensing devices for biomaterials, such as bone graft materials, often leave residual material trapped in attachment devices, leading to wastage and the need for excess material preparation due to the inability to fully expel the biomaterial from the syringe and cannulus devices.
Innovation Solution
A dispensing syringe device and cannulus device assembly that includes a plunger with a passageway for a stylet, allowing the stylet to engage and push remaining biomaterial out of the cannulus device, ensuring complete dispensing of the biomaterial from the syringe and cannulus devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If a syringe plunger is used to advance bone graft material from a syringe through an attachment device, then the bone graft material can be dispensed from the syringe, but the attachment device still contains trapped bone graft material that cannot be expelled
Solution Approach 1:
A stylet is introduced as an intermediary tool that passes through the plunger's passageway to directly engage and push the trapped bone graft material out of the attachment device. The stylet acts as a mediator between the operator and the trapped material, enabling complete expulsion that was not achievable with the plunger alone.
Solution Approach 2:
The dispensing function is segmented into two distinct phases: first, the plunger advances material from the syringe through the attachment device; second, the stylet is inserted through the plunger's passageway to specifically address and expel the trapped material remaining in the attachment device. This segmentation allows each component to perform its specialized function effectively.
2Reliability
If more bone graft material is prepared to offset the amount trapped in the attachment device, then complete dispensing can be achieved, but the cost increases due to the expensive components of the bone graft material
Solution Approach 1:
The plunger is designed with an integrated passageway that allows the stylet to pass through it and directly access the trapped material in the attachment device. This self-service design enables the system to complete its own dispensing function without requiring additional material preparation or external intervention beyond the stylet insertion.
3Productivity
If the syringe plunger is completely depressed to expel all bone graft material, then material is advanced from the syringe, but the attachment device retains trapped material making further plunger operation ineffective
Solution Approach 1:
The plunger serves multiple functions: it advances bone graft material from the syringe during normal dispensing, and it also serves as a guide and passageway for the stylet to access and expel trapped material. This multi-functionality reduces the need for separate mechanisms while maintaining complete dispensing capability.
Data Source
AI summary
A plunger for use with a dispensing syringe to dispense a biomaterial is disclosed. The plunger includes a plunger body having a plunger head at its distal end and a plunger base at its proximal end. The plunger body defines a plunger passageway extending through the plunger body from the proximal end to the distal end. The plunger head is received within a syringe passageway of the dispensing syringe, and the plunger passageway receives a stylet.