Medical Pump Unit Segmentation for Sterile Water Jet Surgery
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Solution Overview
Problem
Current medical pumps for water jet surgery are costly to maintain due to the need for substantial and complex devices to generate high pressure, and they do not ensure easy and sterile operation.
Innovation Solution
A medical pump design featuring a pump unit with a controllable drive device that actuates holding devices and clutch means for reversible attachment and detachment, using snap fittings for easy operation and reduced user effort, and a motor control for precise piston displacement, ensuring sterility and efficient setup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If substantial connection devices are used to maintain firm hold on the pump device during operation, then reliability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The pump system is divided into a reusable pump actuating device and a disposable pump unit. The connection devices are segmented into holding devices for positioning and clutch means for power transmission, allowing each component to be optimized independently. The pump unit can be easily exchanged while maintaining reliable connection during operation.
Solution Approach 2:
The drive device automatically actuates the holding devices and clutch means to establish and maintain the connection between the pump unit and actuating device. The system uses the drive device's own actuation to create the holding force, eliminating the need for separate substantial connection mechanisms.
2Power
If large forces are applied to generate high pressure with sufficient flow, then pump performance is improved, but ease of operation deteriorates due to complex connection requirements
Solution Approach 1:
The drive device automatically actuates the holding devices and clutch means using its own drive mechanism. The user simply needs to position the pump unit and activate the drive device, which then automatically establishes the connection and transmits power without requiring manual manipulation of complex connection mechanisms.
Solution Approach 2:
The holding devices are pre-positioned to engage with the pump unit upon insertion. The clutch means are pre-configured to automatically engage when the pump unit is positioned correctly, eliminating the need for complex manual connection procedures while maintaining the ability to generate large forces for high pressure output.
3Ease of operation
If snap fittings are used for easy connection and detachment, then ease of operation is improved, but holding force may be reduced
Solution Approach 1:
The connection system is segmented into two functional stages: first, snap fittings provide easy positioning and preliminary connection; second, the drive device actuates holding devices and clutch means to establish the full power transmission connection. This segmentation allows each stage to be optimized for its specific function.
Solution Approach 2:
The snap fittings perform preliminary positioning and alignment of the pump unit with the actuating device. Once positioned, the drive device automatically actuates the holding devices and clutch means to establish the full connection, ensuring both ease of initial setup and sufficient holding force during 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 design simplifies the connection and operation of the pump unit, reduces the energy required for setup, and maintains high holding force, ensuring reliable and sterile operation with reduced user manipulation, enhancing pump performance and sterility.
Implementation Method 1
A pump unit (20) which is assembled as a single use article and which comprises at least one piston (22) and piston rod (25) for displacing the piston in an allocated cylinder (21) defined by the pump unit
Implementation Method 2
The holding devices and/or the clutch devices are preferably snap fittings. The snap fittings are constructed so that closing of the holding devices and/or clutch devices can be achieved by snapping the holding devices and/or clutch devices in place
Data Source
AI summary
The invention relates to a medical pump, especially for water jet surgery, in which a pump unit is assembled as a single use article and can be reversibly connected to a pump actuating device. Within the pump, the pump actuating device is also used to open up the connection between the pump unit and the pump actuating device.