Manual Suction Device for Thrombus Capture
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Solution Overview
Problem
Current medical devices for removing thrombolytic material from a patient's bloodstream are limited in design and functionality, necessitating alternative manual suction devices that can effectively capture unwanted materials while returning blood to the patient.
Innovation Solution
The development of manual suction devices featuring a housing with a pump, a piston, a connecting rod, and a rotating disk, along with one-way valves, which allow for efficient fluid flow and capture of unwanted materials, facilitating mechanical thrombectomy and blood filtration systems for returning filtered blood to the patient.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual suction devices are used for thrombus capture, then the ability to remove unwanted materials from bloodstream is improved, but the device complexity increases
Solution Approach 1:
The pump mechanism is divided into distinct functional components: a piston for creating pressure differential, a connecting rod for motion transmission, and a rotating disk with offset pivot for converting rotational to linear motion. This segmentation allows each component to perform its specific function efficiently while maintaining overall system reliability for thrombus capture.
Solution Approach 2:
The pump employs dynamic motion conversion where rotational movement of the disk is transformed into reciprocating linear motion of the piston through the offset connecting rod mechanism. This dynamic conversion enables continuous operation and maintains reliable suction for capturing thrombi while managing mechanical complexity through motion transformation.
2Ease of operation
If one-way valves are incorporated in the fluid inlet and outlet, then fluid flow control is improved, but the device complexity increases
Solution Approach 1:
The one-way valves are designed to automatically control fluid flow direction based on pressure differential created by piston motion. The inlet valve opens when piston moves away from fluid path allowing fluid entry, and closes when piston moves toward fluid path. The outlet valve performs the opposite function. This self-regulating mechanism simplifies operation while managing complexity through automatic pressure-driven valve actuation.
3Productivity
If a manually operated pump with piston and connecting rod is used, then the ability to pull and expel fluid alternately is improved, but the ease of operation decreases
Solution Approach 1:
The pump converts simple rotational motion of the disk into complex reciprocating linear motion of the piston through the offset connecting rod mechanism. This dynamic motion transformation allows the user to operate the pump with simple rotational hand movements while achieving efficient alternating fluid intake and expulsion, improving productivity without significantly compromising ease of operation.
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 solution enables effective capture and removal of thrombolytic material from the bloodstream while ensuring the safe return of filtered blood to the patient, enhancing the efficiency and reliability of medical procedures.
Implementation Method 1
A piston is slidingly disposed within a cylinder formed within the housing. A connecting rod is pivotably secured to the piston and a rotating disk having a handle to rotate the disk
Implementation Method 2
A one way inlet valve is disposed within the fluid inlet such that fluid is allowed to flow into the fluid inlet when the piston is moved away from the fluid path but is prevented from flowing out of the fluid inlet when the piston is moved towards the fluid path
Implementation Method 3
A one way outlet valve is disposed within the fluid outlet such that fluid is allowed to flow out of the fluid outlet when the piston is moved towards the fluid path but is prevented from flowing into the fluid outlet when the piston is moved away from the fluid path
Data Source
AI summary
A medical device is adapted for use in assisting with mechanical thrombectomy. The medical device may include a housing that is adapted to be held within a user's hand and a pump that is secured within the housing. A fluid inlet is adapted to receive fluid that is pulled towards the pump and is fluidly coupled with the pump. A fluid outlet is adapted to expel fluid away from the pump and is fluidly coupled with the pump. As the pump is operated by the user, fluid is alternatively pulled into the fluid inlet and expelled through the fluid outlet. In some cases, the fluid may be blood or other bodily fluids.