Utilize este identificador para referenciar este registo:
http://hdl.handle.net/10071/7333
Autoria: | Pinheiro, E. Postolache, O. Girão, P. |
Data: | 2013 |
Título próprio: | Contactless Impedance Cardiography Using Embedded Sensors |
Volume: | 13 |
Número: | 3 |
Paginação: | 157-164 |
ISSN: | 1335-8871 |
Palavras-chave: | Biomedical instrumentation Embedded sensing Impedance measurement Non-invasive monitoring Unobtrusive devices Wheelchair technology |
Resumo: | Impedance cardiography is a technique developed with the intent of monitoring cardiac output. By inspecting a few properties of the obtained signal (impedance cardiogram (ICG), the left ventricular ejection time can be derived with certainty, and an estimate of cardiac output is available. This signal is nowadays used in non-invasive monitoring, requiring the placement of electrodes over the subject’s skin, either ECG-type or in the form of encircling bands. The work here reported describes the implementation steps and the results obtained when embedding the ICG circuitry in a wheelchair’s backrest. The subject is seated normally, is normally dressed, and is completely unaware that monitoring is taking place. That means that the variation of tenths of ohm produced due to the cardiac cycle has to be detected with electrodes having substantial coupling impedance. Contactless ICG with embedded sensors was developed and tested on fourteen healthy subjects. The signal was always acquired, although respiratory activity is also important, constituting a noteworthy innovation in the area |
Arbitragem científica: | Sim |
Acesso: | Acesso Embargado |
Aparece nas coleções: | CTI-RI - Artigos em revistas científicas internacionais com arbitragem científica IT-RI - Artigos em revistas científicas internacionais com arbitragem científica |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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publisher_version_Contactless Impedance Cardiography.pdf Restricted Access | 612,7 kB | Adobe PDF | Ver/Abrir Request a copy |
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