Handheld Aspiration Pump With Stable Vacuum for Thrombectomy
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Solution Overview
Problem
Existing pump systems for aspiration thrombectomy are large, expensive, difficult to sterilize, and lack power efficiency and consistent pump pressure, leading to potential vessel collapse due to irregular vacuum cycles.
Innovation Solution
A disposable, handheld pump system with a pump chassis that houses an inlet, outlet, and a flow controller, featuring a dual displacement adapter to alternately pump fluid through separate chambers, ensuring consistent vacuum strength and manual support, and includes a flow meter for feedback control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If reusable large footprint pump systems are used, then pump power and vacuum strength are sufficient, but device size increases, cost increases, and sterilization difficulty increases
Solution Approach 1:
The pump system is divided into separate modular components including a pump chamber, actuator, flow controller, and housing that can be manufactured and sterilized independently, then assembled into a compact disposable unit that maintains sufficient pump power while reducing overall device complexity
Solution Approach 2:
The invention employs a disposable pump system that eliminates the need for expensive reusable equipment. The disposable nature allows for simplified design and manufacturing while maintaining adequate pump power for thrombectomy procedures, and eliminates sterilization requirements entirely
2Ease of manufacture
If simple pump design is used, then manufacturing cost decreases, but pump pressure consistency deteriorates and vessel collapse risk increases
Solution Approach 1:
The pump system incorporates a flow controller that dynamically adjusts fluid flow based on real-time feedback from a flow meter, maintaining consistent pump pressure throughout the procedure. The actuator can modulate its output to compensate for varying resistance, preventing pressure spikes that could cause vessel collapse while keeping the overall design manufacturable
Solution Approach 2:
A flow meter provides real-time feedback on fluid flow rate to a control system that adjusts the actuator output accordingly. This closed-loop control maintains consistent vacuum pressure during aspiration, preventing both pressure drops that reduce effectiveness and pressure spikes that could collapse vessels, while the control algorithm is simple enough to implement in cost-effective hardware
3Device complexity
If irregular vacuum cycle is used, then pump design simplicity is maintained, but harmful effects occur due to pressure spikes causing vessel collapse
Solution Approach 1:
The pump operates in controlled periodic cycles with regulated vacuum phases and release phases. The flow controller modulates the vacuum application in a rhythmic pattern that prevents continuous high negative pressure, allowing vessels to recover between cycles and avoiding collapse while maintaining effective thrombus aspiration over time
Solution Approach 2:
The system dynamically adjusts vacuum pressure levels and cycle timing based on flow meter feedback and procedural conditions. The actuator can vary its pumping speed and duration to maintain safe pressure thresholds, preventing vessel collapse while adapting to changing resistance from thrombus material, all through simple control logic
4Ease of manufacture
If disposable pump system is used, then sterilization ease and cost are improved, but pump power and vacuum strength may be insufficient
Solution Approach 1:
The pump is designed as a disposable single-use device that is manufactured in a sterile state and requires no sterilization process. This eliminates sterilization complexity while the pump maintains sufficient vacuum strength through optimized chamber design, efficient actuator selection, and streamlined fluid pathways that maximize suction capability within the disposable format
Solution Approach 2:
The disposable pump achieves adequate vacuum strength by optimizing key parameters including chamber volume, actuator stroke length and speed, inlet/outlet port sizes, and sealing efficiency. These parameters are carefully selected and tuned during design to ensure the smaller disposable unit can generate vacuum forces comparable to larger reusable systems
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 system reduces costs and maintains high vacuum strength while preventing vessel collapse, offering a compact, efficient, and user-friendly solution for aspiration thrombectomy.
Implementation Method 1
a vacuum pump system... configured to aspirate biological material from a patient's lumen
Implementation Method 2
aspirate the biological material from the lumen of the patient
Data Source
AI summary
An intraluminal system for aspirating biological material from a lumen of a patient includes a disposable intraluminal device having a proximal portion and a distal portion. The system includes a disposable pump configured to aspirate the biological material from the lumen of the patient. The disposable pump is coupled to the proximal portion of the intraluminal device. The disposable pump comprises a pump chassis that houses: an inlet port configured to sealably attach to the proximal portion of the intraluminal device; an outlet port configured to expel the aspirated biological from the pump; and a flow controller configured to adjust a fluid flow through the pump, wherein the pump chassis is sized and shaped to be manually supported by a user.