Bone Dust Trap 2-Stage Filtration Clogging Prevention
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Solution Overview
Problem
Existing bone particles collecting devices face issues with inefficient filtration due to one-stage systems, unstable positioning, frequent emptying needs, and fragile components, leading to incomplete collection and increased procedural time and costs.
Innovation Solution
A 2-stage filtration system with larger pores on vertical plates and smaller pores on a circular membrane, along with strategically placed inlet and outlet tubes and durable construction, ensures stable positioning and efficient collection of bone particles without washing out, even during cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a one-stage filtration system with larger pores is used, then the device can handle higher flow rates and reduce clogging, but smaller bone particles are washed out and cannot be collected
Solution Approach 1:
The filtration system is divided into two distinct stages: a first stage with larger pores for initial filtration and flow maintenance, and a second stage with smaller pores for capturing fine bone particles. This segmentation allows each stage to specialize in different particle sizes, preventing washout while maintaining productivity.
Solution Approach 2:
The patent transitions from a single-stage to a two-stage filtration system, adding another dimension to the filtration process. The first stage handles coarse particles while the second stage captures fine particles, effectively utilizing multiple filtration levels to collect the complete spectrum of bone particle sizes.
2Quantity of substance
If a one-stage filtration system with smaller pores is used, then smaller bone particles can be collected, but the pores get clogged frequently
Solution Approach 1:
The filtration system is divided into two distinct stages: a first stage with larger pores for initial filtration and flow maintenance, and a second stage with smaller pores for capturing fine bone particles. This segmentation allows each stage to specialize in different particle sizes, preventing washout while maintaining productivity.
Solution Approach 2:
The first stage with larger pores acts as an intermediary that pre-filters the bone dust before it reaches the second stage with smaller pores. This intermediary stage prevents direct contact between the fine filtration layer and large particles, reducing clogging and maintaining flow rates.
3Device complexity
If inlet and outlet tubes are located on opposite sides of the device, then the device can be designed with simpler tubing configuration, but the device becomes too large to fit securely in the drape pouch for stable positioning
Solution Approach 1:
The inlet and outlet tubes are positioned on the same side of the device, merging their access points into a single location. This allows the device to be compact and fit securely within the drape pouch while maintaining functional simplicity, as both tubes can be accessed through the same opening.
4Volume of moving object
If the device is made smaller to fit comfortably in the drape pouch, then positioning is easier and more stable, but the collection capacity is reduced and requires frequent emptying
Solution Approach 1:
The device employs a conical outlet port with a larger diameter than the inlet port, creating a localized expansion at the outlet. This conical geometry allows the device to maintain a compact overall size for comfortable positioning while providing sufficient internal volume for adequate collection capacity during the surgical procedure.
5Device complexity
If the inlet and outlet tube walls are made thinner to reduce device weight and complexity, then the device is easier to handle and install, but the tubes become fragile and break easily during use
Solution Approach 1:
The outlet port is designed with a conical shape and a larger diameter than the inlet port. This parameter change in the outlet port geometry creates a negative pressure differential that enhances the structural integrity of the tubes and prevents breaking, while still maintaining relatively thin walls for ease of handling.
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 Bone Dust Trap effectively collects a high volume of bone particles, preventing washout and clogging, with stable positioning and durable design, reducing procedural time and costs by allowing larger capacity and secure operation within a drape pouch.
Implementation Method 1
The first stage consists of the plurality of plates, with larger pores, located vertically on the inner surface of the cylindrical housing unit. The larger bone particles are accumulated on the above mentioned plates during the filtration process. The second stage of the 2-stage filtration system is a circular pours membrane with smaller pores, located on the lower part of the central pipe in the cylindrical housing unit. The membrane collects the smallest bone particles.
Implementation Method 2
The cyclone forming mechanism includes the inlet port with conical jet and the spiral helix. The cyclone forming mechanism creates spiral movement of the incoming liquid.
Implementation Method 3
The outlet port of the Bone Dust Trap is shaped conically to provide rigid connection with the standard suction tubing. The outlet port inner diameter on the outlet side is larger than the inner diameter of the inlet port on the inlet side. Different in size inner diameters the said outlet and inlet port create negative pressure to ensure tightness of the device.
Data Source
AI summary
The Bone Dust Trap for collecting bone dust during various surgical procedures for subsequent bone graft implantation. The device includes cylindrical housing unit covered with the lid, attached to the central pipe with the porous tip. The pipe connects the cyclone forming mechanism and filtrating membrane, located at the lower part of the central pipe. The membrane interlinks with the plurality of porous plates located along the walls of the cylinder. The cyclone forming mechanism, consisting of the inlet port with conical jet and the spiral helix, creates spiral movement of the incoming fluid. The liquid is further directed towards the 2-stage filtrating system with the said porous plates, where larger bone particles are accumulated, and then to the filtrating membrane, which collects smaller particles. The fluid is extracted through the central pipe. The lid can be removed to collect the bone particles from plates and membrane.