Noninvasive electrical impedance sensor for in vivo tissue discrimination at radio frequencies.
Identifieur interne : 000F89 ( Main/Exploration ); précédent : 000F88; suivant : 000F90Noninvasive electrical impedance sensor for in vivo tissue discrimination at radio frequencies.
Auteurs : Yu Dai [République populaire de Chine] ; Jun Du ; Qing Yang ; Jianxun ZhangSource :
- Bioelectromagnetics [ 1521-186X ] ; 2014.
English descriptors
- KwdEn :
- Animals, Electric Impedance, Electrodes, Electronics, Medical, Equipment Design, Feasibility Studies, Kidney (physiology), Mechanical Phenomena, Minimally Invasive Surgical Procedures (instrumentation), Minimally Invasive Surgical Procedures (methods), Models, Biological, Rabbits, Radio Waves, Signal Processing, Computer-Assisted, Stomach (physiology), Swine.
- MESH :
- instrumentation : Minimally Invasive Surgical Procedures.
- methods : Minimally Invasive Surgical Procedures.
- physiology : Kidney, Stomach.
- Animals, Electric Impedance, Electrodes, Electronics, Medical, Equipment Design, Feasibility Studies, Mechanical Phenomena, Models, Biological, Rabbits, Radio Waves, Signal Processing, Computer-Assisted, Swine.
Abstract
Compared to traditional open surgery, minimally invasive surgery (MIS) allows for a more rapid and less painful recovery. However, the lack of significant haptic feedback in MIS can make tissue discrimination difficult. This paper tests a noninvasive electrical impedance sensor for in vivo discrimination of tissue types in MIS. The sensor consists of two stainless steel spherical electrodes used to measure the impedance spectra over the frequency range of 200 kHz to 5 MHz. The sensor helps ensure free movement on an organ surface and prevents soft tissues from being injured during impedance measurement. Since the recorded electrical impedance is correlated with the force pressed on the electrode and the mechanical property of the tissue, the electrode-tissue contact impedance is calculated theoretically. We show that the standard deviation of the impedance ratio at each frequency point is sufficient to distinguish different tissue types. Both in vitro experiment in a pig kidney and in vivo experiment in rabbit organs were performed to demonstrate the feasibility of the electrical impedance sensor. The experimental results indicated that the sensor, used with the proposed data-processing method, provides accurate and reliable biological tissue discrimination.
DOI: 10.1002/bem.21854
PubMed: 24764269
Affiliations:
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Le document en format XML
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<author><name sortKey="Yang, Qing" sort="Yang, Qing" uniqKey="Yang Q" first="Qing" last="Yang">Qing Yang</name>
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<author><name sortKey="Du, Jun" sort="Du, Jun" uniqKey="Du J" first="Jun" last="Du">Jun Du</name>
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<series><title level="j">Bioelectromagnetics</title>
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<term>Feasibility Studies</term>
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<term>Mechanical Phenomena</term>
<term>Minimally Invasive Surgical Procedures (instrumentation)</term>
<term>Minimally Invasive Surgical Procedures (methods)</term>
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<term>Radio Waves</term>
<term>Signal Processing, Computer-Assisted</term>
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<term>Swine</term>
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<front><div type="abstract" xml:lang="en">Compared to traditional open surgery, minimally invasive surgery (MIS) allows for a more rapid and less painful recovery. However, the lack of significant haptic feedback in MIS can make tissue discrimination difficult. This paper tests a noninvasive electrical impedance sensor for in vivo discrimination of tissue types in MIS. The sensor consists of two stainless steel spherical electrodes used to measure the impedance spectra over the frequency range of 200 kHz to 5 MHz. The sensor helps ensure free movement on an organ surface and prevents soft tissues from being injured during impedance measurement. Since the recorded electrical impedance is correlated with the force pressed on the electrode and the mechanical property of the tissue, the electrode-tissue contact impedance is calculated theoretically. We show that the standard deviation of the impedance ratio at each frequency point is sufficient to distinguish different tissue types. Both in vitro experiment in a pig kidney and in vivo experiment in rabbit organs were performed to demonstrate the feasibility of the electrical impedance sensor. The experimental results indicated that the sensor, used with the proposed data-processing method, provides accurate and reliable biological tissue discrimination.</div>
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<name sortKey="Yang, Qing" sort="Yang, Qing" uniqKey="Yang Q" first="Qing" last="Yang">Qing Yang</name>
<name sortKey="Zhang, Jianxun" sort="Zhang, Jianxun" uniqKey="Zhang J" first="Jianxun" last="Zhang">Jianxun Zhang</name>
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<country name="République populaire de Chine"><noRegion><name sortKey="Dai, Yu" sort="Dai, Yu" uniqKey="Dai Y" first="Yu" last="Dai">Yu Dai</name>
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