Catheter Tip Placement Using Ultrasound, Magnetic Tracking, and ECG
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing catheter placement methods lack accuracy and often require harmful X-ray confirmation, leading to increased patient exposure and procedural inefficiencies.
Innovation Solution
An integrated catheter placement system combining ultrasound-assisted guidance, magnetically-based tip location tracking, and ECG signal-based guidance to accurately position the catheter tip within the vasculature, allowing for real-time visualization and correction of malposition without the need for X-rays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional catheter placement methods are used, then the procedure can be performed with simple equipment, but the placement accuracy is poor and requires harmful X-ray confirmation
Solution Approach 1:
The patent replaces the mechanical/radiological confirmation system (X-ray fluoroscopy) with a magnetic field-based detection system. A magnetic sensor detects the magnetic field generated by a magnet in the catheter tip, providing real-time positional feedback without ionizing radiation. This substitution eliminates the need for harmful X-ray confirmation while improving placement accuracy through continuous magnetic field tracking.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the catheter and the detection system. Instead of directly visualizing the catheter with X-rays, a magnet embedded in the catheter tip generates a magnetic field that serves as a mediator for positional detection. This intermediary enables non-ionizing, real-time tracking of catheter position, improving accuracy while avoiding radiation exposure.
2Measurement precision
If multiple guidance modalities are integrated into a single system, then catheter placement accuracy is enhanced, but the device complexity increases
Solution Approach 1:
The patent combines multiple guidance modalities (ultrasound imaging, magnetic field detection, and ECG monitoring) into a single integrated system. The ultrasound probe serves as a common platform that houses both ultrasound transducers for imaging and magnetic sensors for detecting the catheter's magnetic field. This merging of functions into a unified device reduces the number of separate equipment pieces needed while maintaining high placement accuracy through multi-modal guidance.
Solution Approach 2:
The ultrasound probe is designed with multi-functionality, serving both as an imaging device and as a magnetic field detection device. The same probe that provides ultrasound guidance also contains magnetic sensors that detect the catheter's position via its embedded magnet. This universal design allows a single device to perform multiple guidance functions, reducing overall system complexity while enhancing placement accuracy through complementary modalities.
3Reliability
If real-time tracking of catheter tip position is implemented, then malposition can be detected and corrected immediately, but the system requires multiple sensors and modalities increasing complexity
Solution Approach 1:
The catheter incorporates an embedded magnet that serves as its own identification and positioning marker. This self-service approach eliminates the need for external tracking markers or complex imaging systems to locate the catheter tip. The magnetic sensor in the ultrasound probe simply detects the field from this self-contained magnetic source, enabling real-time position detection with minimal additional hardware. The catheter essentially provides its own tracking signal through the embedded magnet.
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
Enhances catheter placement accuracy, reduces patient exposure to radiation, and streamlines the procedure by enabling seamless control of multiple modalities from within the sterile field, thus improving efficiency and safety.
Implementation Method 1
The tip location sensor senses a magnetic field of a stylet disposed in a lumen of the catheter
Implementation Method 2
The ultrasound probe ultrasonically images a portion of the vasculature prior to introduction of the catheter into the vasculature
Data Source
AI summary
A catheter placement system includes a catheter assembly, an external ultrasound probe, a tip location sensor, and a console. The catheter assembly includes a catheter, a magnetic component producing a magnetic field, and an electrocardiogram (ECG) sensor designed to measure an intravascular ECG signal. The external ultrasound probe includes user input controls. The tip location sensor is configured to detect the magnetic field of the magnetic component when the catheter is disposed in the patient, the magnetic field providing magnetic field information for locating the magnetic component relative to the tip location sensor, and to receive the intravascular ECG signal from the ECG sensor. The console is coupled to the tip location sensor and includes a processor and a display. The display is configured to show an image from the external ultrasound probe, a graphical representation of the magnetic component, and successive ECG waveforms detected by the ECG sensor.