The IMPACT shirt: textile integrated and portable impedance cardiography

Abstract

Measurement of hemodynamic parameters such as stroke volume (SV) via impedance cardiography (ICG) is an easy, non-invasive and inexpensive way to assess the health status of the heart. We present a possibility to use this technology for monitoring risk patients at home. The IMPACT Shirt (IMPedAnce Cardiography Textile) has been developed with integrated textile electrodes and textile wiring, as well as with portable miniaturized hardware. Several textile materials were characterized in vitro and in vivo to analyze their performance with regard to washability, and electrical characteristics such as skin-electrode impedance, capacitive coupling and subjective tactile feeling. The small lightweight hardware measures ECG and ICG continuously and transmits wireless data via Bluetooth to a mobile phone (Android) or PC for further analysis. A lithium polymer battery supplies the circuit and can be charged via a micro-USB. Results of a proof-of-concept trial show excellent agreement between SV assessed by a commercial device and the developed system. The IMPACT Shirt allows monitoring of SV and ECG on a daily basis at the patient's home.

Automatic analysis of pre‐ejection period during sleep using impedance cardiogram

“…With the advancement in sensing technology, portable wearable solutions for impedance cardiography are quickly growing (Hafid et al, 2018;Hu et al, 2014b;Pinheiro et al, 2013;Ulbrich et al, 2014;Weyer, Menden, Leicht, Leonhardt, & Wartzek, 2015;Yazdanian, Mahnam, Edrisi, & Esfahani, 2016). The opportunity to collect continuous information about electromechanical parameters of the cardiovascular system in naturalistic settings needs automatic processing and analysis of noisy data collected over extended time periods without the need for expert inspection and visual scoring.…”

Simultaneous Recording of ICG and ECG Using Z-RPI Device with Minimum Number of Electrodes

“…Development of personalized health (p-health) solutions and advances in smart textiles and textile manufacturing has allowed new developments of wearable measurement systems targeting fitness and even home-care but often they have been limited to biopotential recordings [19,20]. Recent advances in microelectronics have produced system-on-chip (SoC) solutions for biopotential and bioimpedance measurements, and most of them have been successfully tested in several EBI applications [21][22][23][24][25]. Thus, we can confirm that their availability and accessibility have indeed fostered research and development activities targeting p-health monitoring applications based on different embedded electronic wearable measurement systems and patch technology [23,[26][27][28].…”

Automatic Detection of Seismocardiogram Sensor Misplacement for Robust Pre-Ejection Period Estimation in Unsupervised Settings

“…For example, the reference standard for noninvasive PEP measurement is echocardiography which requires a large and expensive apparatus to be operated by trained medical staff [8]. Impedance cardiography (ICG), was validated against echo as a reliable way of measuring PEP [9], however, it is also difficult to use in out-of-clinic settings.…”

“…ICG is obtrusive to measure as it requires a trained medical professional to apply eight electrodes to the subject and operate the measuring device [10], [11]. In [8], the authors developed an unobtrusive way to obtain ICG through textile integration. There is also an increased interest in optical fiber sensors and their integration into smart textiles for non-invasive monitoring of cardiac parameters [12], [13].…”