ECG-Based Catheter Tip Reconfirmation System
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Solution Overview
Problem
Current methods lack effective means to confirm and reconfirm the position of a catheter or indwelling device placed using ECG signals, leading to potential migration and improper delivery of medicaments.
Innovation Solution
A system and method that involves storing a first ECG signal profile during initial catheter placement and comparing it with a subsequent second profile to determine if displacement has occurred, using ECG signal monitoring and processing to guide repositioning if necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ECG signals are used to guide initial catheter placement, then placement accuracy is improved, but there is no method to confirm whether the catheter remains in the correct position over time
Solution Approach 1:
The system performs preliminary action by acquiring and storing a reference ECG signal profile during initial catheter placement when the catheter is known to be in the correct position. This reference profile serves as a baseline for future comparisons to detect any displacement, enabling proactive monitoring before clinical problems arise.
Solution Approach 2:
The system implements feedback by continuously acquiring new ECG signal profiles and comparing them against the stored reference profile. When differences exceed a predetermined threshold, the system alerts the clinician that the catheter may have migrated, providing real-time feedback to ensure continued proper positioning without requiring repeated invasive verification.
2Device complexity
If traditional placement methods are used without ECG monitoring, then device complexity is reduced, but placement accuracy and position verification capability are insufficient
Solution Approach 1:
The system achieves multi-functionality by using the existing ECG monitoring infrastructure already present in clinical settings. The same ECG leads and amplifiers used for cardiac monitoring are repurposed to detect catheter tip position through impedance changes, eliminating the need for separate specialized sensors or imaging equipment while maintaining high placement accuracy.
Solution Approach 2:
The catheter itself serves the dual function of delivering medication and providing positional information. The catheter's electrical impedance characteristics change predictably with position, allowing it to act as both a therapeutic device and a sensing element, thereby eliminating the need for additional complex positioning hardware.
3Loss of time
If catheter position is not reconfirmed, then loss of time for additional procedures is avoided, but risk of improper medicament delivery due to migration increases
Solution Approach 1:
The system maintains continuous monitoring of catheter position through repeated ECG signal acquisitions and comparisons. This continuous action detects migration in real-time without requiring discontinuous invasive procedures, ensuring the catheter remains properly positioned for safe medicament delivery while minimizing interruption to patient care.
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
Ensures accurate and consistent placement of the catheter tip by enabling reconfirmation of its position, ensuring that medicaments are delivered to the intended region within the vasculature.
Implementation Method 1
a method for reconfirming a position of an indwelling medical device within a body of a patient includes placing the medical device within the body of the patient using ECG signals of the patient
Data Source
AI summary
A catheter includes a proximal portion designed for residing externally of a patient vasculature and a distal portion having a distal tip designed for placement in a desired position within the patient vasculature. A storage component is embedded in a portion of the catheter, the storage component including a radio-frequency identification (RFID) chip. The RFID chip includes non-volatile memory that is programmable by a RFID encoder. The storage component includes data related to the placement of the distal tip of the catheter in the desired position within the patient vasculature.