Cerebrospinal Fluid Flow Detector with Radiopaque Markers
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Solution Overview
Problem
Current methods for detecting cerebrospinal fluid flow through shunts, such as ventriculoperitoneal shunts, are invasive and unreliable, often requiring uncomfortable procedures and skilled interpretation, and traditional imaging techniques fail to confirm fluid flow effectively due to occlusions and protein buildup.
Innovation Solution
A fluid flow detector with a rotatable wheel and radially extending arms equipped with radiopaque markers that move in response to cerebrospinal fluid flow, allowing X-ray imaging to visualize and quantify fluid movement through a shunt system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional imaging techniques such as computed tomography scanning are used to detect cerebrospinal fluid flow, then the procedure is non-invasive, but the detection accuracy is insufficient due to inability to determine flow occurrence through occluded shunts
Solution Approach 1:
A radiopaque marker is introduced as an intermediary element within the shunt system. This marker serves as a mediator between the cerebrospinal fluid flow and the external imaging detection system, enabling accurate flow detection through its visible movement on imaging studies even when the shunt is occluded
Solution Approach 2:
The radiopaque marker exhibits changes in its radiographic appearance (analogous to color changes) that indicate fluid flow status. The marker's visibility and position changes on imaging studies provide direct visual evidence of cerebrospinal fluid flow occurrence
2Reliability
If invasive procedures such as shunt tap are used to detect cerebrospinal fluid flow, then the detection reliability is improved, but the patient comfort and infection risk deteriorate
Solution Approach 1:
The radiopaque marker acts as an intermediary that enables reliable flow detection without requiring invasive procedures. By visualizing marker movement through non-invasive imaging, the system eliminates the need for shunt taps while maintaining detection reliability
Solution Approach 2:
The invasive mechanical procedure of shunt tap is replaced with a non-invasive imaging-based detection system. The radiopaque marker transforms the detection mechanism from invasive fluid withdrawal to non-invasive visual observation of marker position changes
3Stress or pressure
If shunt systems are used to drain cerebrospinal fluid, then the fluid flow pressure normalization is achieved, but the shunt occlusion due to protein buildup deteriorates
Solution Approach 1:
The radiopaque marker is pre-installed in the shunt system before deployment. This preliminary placement enables continuous monitoring of shunt patency and flow status, allowing early detection of occlusion problems before they become critical
Solution Approach 2:
The radiopaque marker provides visual feedback about shunt function and flow status. By observing marker movement on imaging studies, clinicians can determine whether the shunt is patent or occluded, enabling timely intervention to maintain shunt reliability
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 non-invasive, accurate detection and quantification of cerebrospinal fluid flow, reducing patient discomfort and the need for invasive procedures, and providing reliable data for fluid flow confirmation.
Implementation Method 1
any flow of cerebrospinal fluid through the channel of the fluid flow detector causes movement of the rotatable wheel due to the force of the fluid flow against one or more of the radially extending arms
Implementation Method 2
At least one of the radially extending arms includes at least one radiopaque marker in which movement of the rotatable wheel caused by the flow of cerebrospinal fluid through the channel allows an X-ray imaging apparatus to observe the difference in position of each respective radiopaque marker
Data Source
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AI summary
Embodiments for a cerebrospinal fluid flow detector for detecting the flow of cerebrospinal fluid are disclosed. In some embodiments, the cerebrospinal fluid flow detector includes a casing with a rotatable wheel having a plurality of radially extending arms disposed therein. The rotatable wheel is in communication with a channel having a distal end in communication with an inlet port and a proximal end in communication with an outlet port such that the flow of cerebrospinal fluid through the channel causes the rotatable wheel to rotate. In some embodiments, each radially extending arm includes at least one radiopaque marker in which movement of the rotatable wheel caused by fluid flow through the channel allows an X-ray imaging apparatus to detect the difference in position of a respective radiopaque marker at multiple times caused by rotation of the rotatable wheel.