Cerebrospinal Fluid Drainage Pump with Pressure Sensor Control
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Solution Overview
Problem
Existing cerebrospinal fluid drainage systems are complex and require manual or mechanical adjustments to adapt to pressure changes, leading to inaccuracies in fluid drainage due to reliance on height settings and mechanical components.
Innovation Solution
A system incorporating a fluid drainage line, pressure sensors, and a pump that operates based on preset parameters and measured values, allowing for controlled cerebrospinal fluid drainage by actively pumping fluid according to pressure measurements, eliminating the need for specific height settings and mechanical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If height-adjustable stands and balancing chambers are used for cerebrospinal fluid drainage, then drainage pressure can be maintained, but the system becomes complex and requires manual adjustments that lead to inaccuracies
Solution Approach 1:
The patent replaces the mechanical height-adjustable stand and balancing chamber system with an electronically controlled pump system. The pump is driven by a motor that responds to pressure sensor signals, eliminating the need for mechanical height adjustments and manual balancing operations. This substitution of mechanical control with electronic control reduces system complexity while maintaining reliable pressure control.
Solution Approach 2:
The drainage system becomes self-regulating through the integration of pressure sensors that continuously monitor cerebrospinal fluid pressure and automatically adjust pump operation. The system self-adjusts to maintain target pressure without requiring manual intervention or height adjustments, improving reliability while reducing operational complexity.
2Ease of operation
If mechanical components and height settings are used for fluid drainage, then drainage control is achieved, but measurement accuracy and drainage precision are reduced
Solution Approach 1:
The patent replaces mechanical height-setting components with electronic pressure sensors that directly measure cerebrospinal fluid pressure. This substitution provides continuous, accurate pressure feedback without the inaccuracies introduced by mechanical height adjustments and manual balancing operations.
Solution Approach 2:
The system incorporates pressure sensors that provide continuous feedback on actual cerebrospinal fluid pressure to the control system. This feedback loop enables precise measurement and automatic adjustment of drainage rate to maintain target pressure, significantly improving measurement accuracy compared to mechanical systems that rely on height settings.
3Adaptability or versatility
If valves with specific closing pressure are used to control liquor discharge, then discharge control is achieved, but the system cannot adapt quickly to pressure changes and requires manual adjustments
Solution Approach 1:
The pump system with pressure sensor feedback automatically detects and responds to pressure changes in real-time, eliminating the delay associated with manual valve adjustments. The system self-adjusts pumping rate to adapt to changing pressure conditions without requiring manual intervention or having fixed closing pressure characteristics.
Solution Approach 2:
The system transitions from static valve closing pressure control to dynamic pump control that continuously adjusts based on real-time pressure sensor readings. This enables rapid adaptation to pressure changes by varying pump operation in response to actual pressure conditions rather than relying on fixed mechanical valve characteristics.
4Ease of manufacture
If open system drainage with collecting containers is used, then simple drainage is achieved, but volume-controlled drainage and accurate pressure measurement are not possible
Solution Approach 1:
The patent replaces the simple open collecting container system with an electronically controlled closed-loop drainage system. The pump system with pressure sensor feedback provides precise control over drainage volume and rate, enabling accurate pressure measurement and volume-controlled drainage while maintaining system simplicity through electronic control rather than complex mechanical components.
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
Enables precise and accurate cerebrospinal fluid drainage with regulated pumping capacity, maintaining pressure within specific limits and reducing manual inaccuracies, allowing for volume-controlled drainage and improved measurement accuracy.
Implementation Method 1
a pump (5) with hose connections (9) for connection to a brain catheter (8) and a drainage bag (7)
Implementation Method 2
with a pressure sensor (10) on the brain catheter (8)
Data Source
AI summary
The object of providing a cerebrospinal fluid drainage system 1 which reacts precisely to changes in pressure in the cerebrospinal fluid, with ease of operation, is achieved by the present invention in that a pump 5 is used for draining the cerebrospinal fluid (liquor), wherein operating measured values supplied by sensors act as controlled variable for the operation of the pump. The pressure in the liquor line currently measured by a pressure sensor 10, the liquor pressure in the intracranial cavity being treated, measured intracorporeally by a pressure sensor, and/or the volume of liquor already pumped out, as operating measured value, can, for example, serve as the basis for operational control of the pump of the liquor drainage system. The liquor drainage system according to the invention has the advantage that the liquor is drained not only simply on the basis of the excess pressure in the intracranial cavity being treated, but is actively pumped out of the intracranial cavity in a controlled manner, in particular with constant measurement of the liquor pressure. In this way the pumping capacity can be regulated depending on requirement and the drainage pressure or the liquor pressure kept reliably within a specific pressure range.