Finite volume analysis of the temperature distribution during transurethral resection of the prostate

Tino Morgenstern; Daniel Richter; Jörg Himmel; Olfa Kanoun; Stephan Klöckner; Dinan Wang

doi:10.1515/teme-2019-0156

Article

Finite volume analysis of the temperature distribution during transurethral resection of the prostate

Tino Morgenstern
Tino Morgenstern is a research assistant at the Institute for Measurement Engineering and Sensor Technology. He is an external doctoral candidate at the Chemnitz University of Technology since 2014 and is working on material wear analysis on electro surgical components applied in the transurethral resection of prostate tissue. He studied applied physics at the University of applied Science Koblenz in Remagen. He has expertise in measurement technologies and sensor physics in industrial environments and techniques of high frequency surgery.
, Daniel Richter
Daniel Richter studied automotive engineering at the University of Applied Sciences Dortmund and graduated with a Bachelor of Engineering degree. Currently he is finishing his Master degree in Systems Engineering at the University of Applied Sciences Mülheim and works as a research assistant at the Institute for Measurement Engineering and Sensor Technology. He has expertise in temperature and flow field simulation.
, Jörg Himmel
Jörg Himmel received his Dipl.-Ing. degree in electrical engineering and the Ph.D. degree from the University of Siegen in Germany, in 1983 and 1989, respectively. From 1988 to 2000 he was the managing director of a spin-off company of the University of Siegen and got then appointed professor for Measurement Engineering and Sensor Technology at the Koblenz University of Applied Sciences. Since 2010, he is with the Ruhr West University of Applied Sciences in Mülheim/Ruhr, Germany, where he is the head of the institute for Measurement Engineering and Sensor Technology. His current research interests include industrial measurement, non-destructive testing and electro surgery. Prof. Himmel is a member of the IEEE Instrumentation and Measurement Chapter Board of the Germany section.
, Olfa Kanoun
Olfa Kanoun is a full professor for measurement and sensor technology at Chemnitz University of Technology, Germany. She studied electrical engineering and information technology at the Technical University in Munich from 1989 to 1996, where she specialized in the field of electronics. Prof. Kanoun was awarded in 2001 by the Commission of Professors in Measurement Technology (AHMTe.V.) in Germany. In 2016 she has been appointed as Distinguished Lecturer of the IEEE Instrumentation and Measurement Society. In her research, she focuses on sensors, measurement systems and measurement methods. She has a deep experience on impedance spectroscopy, energy harvesting and nanocomposite sensors.
, Stephan Klöckner
Stephan Klöckner is a Senior R&D Specialist from Olympus Surgical Technologies Europe. He works as an R&D engineer for Olympus since 2005 and is an expert for endoscopic applications, high frequency surgery and Standardization Specialist for medical devices. He studied applied physics at the University of applied Science Koblenz/Remagen. His diploma thesis was prepared at Fresenius Medical Care in Friedberg. Mr. Klöckner is a member of several standardization boards for medical devices, at the German DKE, DIN and the DGBMT.
and Dinan Wang
Dinan Wang received her Ph.D degree from School of Mechanical Engineering, University of Leeds, UK in 2006, where she focused on the flow simulations in microfluidics. From 2006 to 2009 she joined two EU projects within the framework of application of high performance computing in bio-medical research at NEC research laboratory in St. Augustin. From the beginning of 2010 she worked at the Institute of Meteorology, University of Bonn, where she focused on climate modelling within the joint DFG-China project “the influence of climate change on the water resource management”. Since 2012 she has been appointed as a professor for fluid mechanic and numerical heat transfer & CFD techniques at University of Applied Science Ruhr West. Her current research interest lies on the simulation of the bio-medical processes, the battery cooling for E-Vehicles, as well as the simulation/optimization of the integrated renewable energy system.

Published/Copyright: April 21, 2020

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From the journal tm - Technisches Messen Volume 87 Issue 7-8

Abstract

In prostate surgery the transurethral resection (TURP) represents the gold standard which is based on monopolar (M-TURP) and bipolar techniques (TURis). The investigation of the thermal behavior is one of the most important research topics in this type of surgery procedures. Here monopolar systems have been well investigated. The research on electrical and thermal behavior of bipolar systems was initiated about two decades ago. Previous studies focused on thermal behavior according to Joule heating, but did not gain information about the temperature distribution close to the active electrode of the resectoscope. Therefore, the numerical simulations on the temperature distribution near the active electrode of the resectoscope with a finite volume method are presented in this study, which takes blood perfusion into account. The results have shown that the influence of the blood perfusion process can be ignored for regions which are more than 0.4 mm away from the active electrode. This is based on two different blood perfusion models.

Zusammenfassung

In der Prostatachirurgie stellt die transurethrale Resektion (TURP) den Goldstandard dar, welcher auf monopolaren (M-TURP) und bipolaren Techniken (TURis) basiert. Hierbei ist die Untersuchung des thermischen Verhaltens eines der wichtigsten Forschungsthemen. Monopolare Systeme weisen dabei einen umfangreichen Stand der Forschung auf. Für bipolare Systeme reicht die Untersuchung des elektrischen und thermischen Verhaltens bis in die 2000er Jahre zurück. Frühere Studien fokussieren sich dabei auf dem thermischen Verhalten auf Basis joulescher Wärme. Es gibt jedoch keine Informationen über die Temperaturverteilung nahe der Aktivelektrode des Resektoskopes. In dieser Arbeit werden die numerischen Simulationen der Temperaturverteilung um die Aktivelektrode des Resektoskopes vorgestellt, welche die Blutperfusion berücksichtigen. Hierbei haben die Ergebnisse gezeigt, dass der Einfluss der Blutperfusion für Bereiche mit Abstand zur Aktivelektrode größer 0,4 mm vernachlässigt werden kann. Berücksichtigt wurden zwei verschiedene Modelle zur Beschreibung der Blutperfusion.

Keywords: Transurethral resection; TURis; temperature distribution; bio-heat; finite volume method; numerical simulation

Schlagwörter: Transurethrale Resektion; TURis; Temperaturverteilung; Bio-Wärme-Gleichung; Finite-Volumen-Methode; numerische Simulation

About the authors

Tino Morgenstern

Tino Morgenstern is a research assistant at the Institute for Measurement Engineering and Sensor Technology. He is an external doctoral candidate at the Chemnitz University of Technology since 2014 and is working on material wear analysis on electro surgical components applied in the transurethral resection of prostate tissue. He studied applied physics at the University of applied Science Koblenz in Remagen. He has expertise in measurement technologies and sensor physics in industrial environments and techniques of high frequency surgery.

Daniel Richter

Daniel Richter studied automotive engineering at the University of Applied Sciences Dortmund and graduated with a Bachelor of Engineering degree. Currently he is finishing his Master degree in Systems Engineering at the University of Applied Sciences Mülheim and works as a research assistant at the Institute for Measurement Engineering and Sensor Technology. He has expertise in temperature and flow field simulation.

Jörg Himmel

Jörg Himmel received his Dipl.-Ing. degree in electrical engineering and the Ph.D. degree from the University of Siegen in Germany, in 1983 and 1989, respectively. From 1988 to 2000 he was the managing director of a spin-off company of the University of Siegen and got then appointed professor for Measurement Engineering and Sensor Technology at the Koblenz University of Applied Sciences. Since 2010, he is with the Ruhr West University of Applied Sciences in Mülheim/Ruhr, Germany, where he is the head of the institute for Measurement Engineering and Sensor Technology. His current research interests include industrial measurement, non-destructive testing and electro surgery. Prof. Himmel is a member of the IEEE Instrumentation and Measurement Chapter Board of the Germany section.

Olfa Kanoun

Olfa Kanoun is a full professor for measurement and sensor technology at Chemnitz University of Technology, Germany. She studied electrical engineering and information technology at the Technical University in Munich from 1989 to 1996, where she specialized in the field of electronics. Prof. Kanoun was awarded in 2001 by the Commission of Professors in Measurement Technology (AHMTe.V.) in Germany. In 2016 she has been appointed as Distinguished Lecturer of the IEEE Instrumentation and Measurement Society. In her research, she focuses on sensors, measurement systems and measurement methods. She has a deep experience on impedance spectroscopy, energy harvesting and nanocomposite sensors.

Stephan Klöckner

Stephan Klöckner is a Senior R&D Specialist from Olympus Surgical Technologies Europe. He works as an R&D engineer for Olympus since 2005 and is an expert for endoscopic applications, high frequency surgery and Standardization Specialist for medical devices. He studied applied physics at the University of applied Science Koblenz/Remagen. His diploma thesis was prepared at Fresenius Medical Care in Friedberg. Mr. Klöckner is a member of several standardization boards for medical devices, at the German DKE, DIN and the DGBMT.

Dinan Wang

Dinan Wang received her Ph.D degree from School of Mechanical Engineering, University of Leeds, UK in 2006, where she focused on the flow simulations in microfluidics. From 2006 to 2009 she joined two EU projects within the framework of application of high performance computing in bio-medical research at NEC research laboratory in St. Augustin. From the beginning of 2010 she worked at the Institute of Meteorology, University of Bonn, where she focused on climate modelling within the joint DFG-China project “the influence of climate change on the water resource management”. Since 2012 she has been appointed as a professor for fluid mechanic and numerical heat transfer & CFD techniques at University of Applied Science Ruhr West. Her current research interest lies on the simulation of the bio-medical processes, the battery cooling for E-Vehicles, as well as the simulation/optimization of the integrated renewable energy system.

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Received: 2019-11-21

Accepted: 2020-03-30

Published Online: 2020-04-21

Published in Print: 2020-07-26

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Articles in the same Issue

https://doi.org/10.1515/teme-2019-0156

Keywords for this article

Transurethral resection; TURis; temperature distribution; bio-heat; finite volume method; numerical simulation