Needle Dislodgement Detection via Near-Infrared Array
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing blood leakage detection devices are prone to false alarms due to the optic fiber probe being easily displaced, cannot detect needle dislodgement, and do not provide continuous monitoring for hypodermic extravasation during therapeutic processes, posing risks to patients.
Innovation Solution
A wearable device with a flexible sensor assembly and alarm system using near infrared transmitters and a microprocessor unit for instantaneous detection of hypodermic extravasation, employing near infrared spectroscopy to measure liquid content and unoxygenated blood concentration, and transmitting alerts wirelessly to medical attendants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-spot detection approach with an optic fiber probe is used, then the device structure is simple, but the probe tip is easily shifted away causing false detection and delay in blood leakage alarm
Solution Approach 1:
The patent divides the single detection spot into multiple detection spots arranged in an array. Instead of using one optic fiber probe tip, the invention employs multiple probes or multiple detection points along the needle path, allowing detection at several locations simultaneously. This segmentation prevents false detections by providing redundant detection points and eliminates the delay caused by probe displacement at a single spot.
2Ease of operation
If the optic fiber probe is arranged on the same parallel line as the needle, then the detection path is direct, but it presses on the area where the needle pierces into the fistula compressing the needle
Solution Approach 1:
The patent transitions from a one-dimensional linear arrangement where the probe is directly on the needle's parallel line to a two-dimensional or three-dimensional spatial configuration. Multiple detection spots are arranged in a pattern (e.g., array, grid, or radial pattern) around the needle insertion area, allowing detection without direct compression of the needle-fistula interface. This dimensional change enables detection while avoiding mechanical interference with the needle.
3Reliability
If a traditional blood leakage detection device is used, then it can detect blood leakage, but it cannot detect needle dislodgement or issue alarm when detached
Solution Approach 1:
The patent designs the detection system to perform multiple functions beyond just blood leakage detection. The same optic fiber probe array and detection circuitry are configured to detect various conditions including needle dislodgement (by monitoring changes in light scattering patterns or detection signal loss), device detachment (through connection status sensing), and blood leakage. This multi-functional design enhances versatility while maintaining reliable blood leakage detection capability.
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 accurate and timely detection of both blood leakage and needle dislodgement, reducing the risk of large-scale bleeding by providing continuous monitoring and immediate alerts to medical staff.
Implementation Method 1
By using the liquid content volume and unoxygenated blood concentration of the skin tissue as a measurement reference, with a plurality of 760 nm-wavelength near infrared transmitters forming array type detection
Implementation Method 2
The photoelectric sensor comprises a plurality of near infrared transmitters, and the near infrared transmitters are of an array arrangement. The photoelectric sensor comprises a signal amplifier module and a signal filter module that are electrically connected
Data Source
AI summary
A needle dislodgement and blood leakage detection device includes a sensor assembly having a flexible sensor and a flexible substrate. The flexible sensor is provided, on an underside thereof at a location close to the flexible substrate, with a photoelectric sensor including near infrared transmitters that are of an array arrangement. The photoelectric sensor includes a signal amplifier module and a signal filter module that are electrically connected. An alarm device is coupled to the sensor assembly and includes a microprocessor unit, which includes a digital signal converter module, a signal sampling module, a signal demodulation module, a signal processing module, a time division module, a storage module, and a wireless transmission module that are connected in series. The digital signal converter module is connected to the signal filter module. The storage module and the wireless transmission module are respectively connected to a display unit and a computer.