Work

Electrical Characteristics of Unintended Needle Dislodgement Detection Circuit using a Noninvasive Sensor

Year: 2025

Type: article

Abstract: Accidental needle dislodgement during blood purification therapy has become a critical issue, occasionally leading to fatalities. This study examines a circuit designed to detect indwelling needle dislodgement through electrostatic capacitive coupling electrically connected to both the dialysis circuit and the patient’s body, thereby functioning as a non-invasive sensor without direct contact between electrodes and blood. Needle dislodgement detection is based on impedance variations between electrodes, and circuit characteristics were analyzed under various experimental conditions. Optimal signal frequency (10 kHz) and load resistor value (200 kΩ) were identified in this study. These findings suggest that the proposed circuit could enhance the safety of blood purification therapy.

Source: Journal of the Institute of Industrial Applications Engineers

DOI: 10.12792/jiiae.13.55

Authors: Naofumi Nakaya, Satoshi Watanabe, Naruki Shirahama, Takayuki Abe, Takayuki Abe

Institutions: Juntendo University, Shizuoka Institute of Science and Technology, Shimonoseki City University, Tokyo Women's Medical University Hospital

Language: English

Topic: Non-Invasive Vital Sign Monitoring

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Good health and well-being

Open Access status: diamond

Funder: Japan Society for the Promotion of Science