Thomas Sühn

Thomas Sühn
Otto-von-Guericke-Universität Magdeburg | OvGU · Faculty of Medicine and University Clinic Magdeburg | INKA - Innovation Laboratory for Image Guided Therapy

Master of Science

About

22
Publications
3,199
Reads
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70
Citations
Citations since 2016
21 Research Items
70 Citations
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Introduction
My research focus on acoustic emission sensing and signal processing in orthopaedics. I am particularly interested in the characterization of tissue-instrument-interactions in arthroscopic surgery by means of vibroacoustic signals & non-invasive monitoring of knee joints (vibroarthrography). At the Medical Faculty I am pursuing my PhD @ "Technology Innovations in Therapies and Imaging" graduate school in cooperation with the Department of Orthopaedic Surgery of Prof. Dr. med. Christoph Lohmann.
Additional affiliations
December 2018 - March 2019
Queensland University of Technology
Position
  • Researcher
Description
  • My research was embedded in a project that aims at developing a robotic surgical assistant for knee arthroscopy. It focused on the evaluation of an acoustic emission based method for tissue-tool-event characterization.
May 2017 - March 2022
Otto-von-Guericke-Universität Magdeburg
Position
  • PhD Student
February 2017 - present
Otto-von-Guericke-Universität Magdeburg
Position
  • Doctoral Research Assistants
Education
October 2008 - January 2016
Technische Universität Ilmenau
Field of study
  • Biomedical Engineering

Publications

Publications (22)
Article
Full-text available
Robotic minimally invasive surgery (RMIS) has played an important role in the last decades. In traditional surgery, surgeons rely on palpation using their hands. However, during RMIS, surgeons use the visual-haptics technique to compensate the missing sense of touch. Various sensors have been widely used to retrieve this natural sense, but there ar...
Conference Paper
Full-text available
In this work we summarize applications of a novel approach for providing complementary information for guiding medical interventional devices (MID) and that have been recently published by our research team. This approach consist of using an audio sensor located in the proximal end of the MID in order to extract meaningful information concerning th...
Article
Full-text available
Arthroscopic surgery is a technically challenging but common minimally invasive procedure with a long learning curve and a high incidence of iatrogenic damage. These damages can occur due to the lack of feedback and supplementary information regarding tissue-instrument-contact during surgery. Deliberately performed interactions can be used however...
Article
Full-text available
Background: Biometric sensing is a security method for protecting information and property. State-of-the-art biometric traits are behavioral and physiological in nature. However, they are vulnerable to tampering and forgery. Methods: The proposed approach uses blood flow sounds in the carotid artery as a source of biometric information. A handhe...
Article
Full-text available
Creating surgical access is a critical step in laparoscopic surgery. Surgeons have to insert a sharp instrument such as the Veress needle or a trocar into the patient’s abdomen until the peritoneal cavity is reached. They solely rely on their experience and distorted tactile feedback in that process, leading to a complication rate as high as 14% of...
Article
Minimal-invasive procedures come with significant advantages for the patient. They also come with problems as the navigation/guidance of the devices to a target location is either based on pre-operatively acquired images and then performed free-hand or is accompanied by intraoperative imaging such as MRI or CT that is expensive, complicated and pro...
Article
Full-text available
About 50 % of complications during laparoscopy occur when surgical access is created. The Veress needle and proposed technical alternatives do not provide reliable information to support the surgeons in guiding the needle, or the feedback is not clearly perceivable. Based on acoustic emissions, Surgical Audio Guidance (SURAG) proposes a non-invasiv...
Conference Paper
Full-text available
Introduction According to a study conducted in 2019, the German health care industry is suffering under severe personnel shortage with a lack of over 50.000 medical care workers, operating room nurses, and surgical technicians. This need will become worse in the upcoming decades. Automatization of highly standardized procedures could be a promising...
Article
Full-text available
Under-staffing of nurses is a significant problem in most countries. It is expected to rise in the coming years, making it challenging to perform crucial tasks like assessing a patient's condition, assisting the surgeon in medical procedures, catheterization and Blood Transfusion etc., Automation of some essential tasks would be a viable idea to ov...
Article
Full-text available
Introduction: Atherosclerotic diseases of the carotid are a primary cause of cerebrovascular events such as stroke. For the diagnosis and monitoring angiography, ultrasound- or magnetic resonance-based imaging is used which requires costly hardware. In contrast, the auscultation of carotid sounds and screening for bruits - audible patterns related...
Article
Full-text available
This work aims to demonstrate the feasibility that haptic information can be acquired from a da Vinci robotic tool using audio sensing according to sensor placement requirements in a real clinical scenario. For that, two potential audio sensor locations were studied using an experimental setup for performing, in a repeatable way, interactions of a...
Article
Full-text available
The location of a puncture needle’s tip and the resistance of tissue against puncture are crucial information for clinicians during a percutaneous procedure. The tip location and needle alignment can be observed by image guidance. Tactile information caused by tissue resistance to rupture, allow clinicians the perception of structural changes durin...
Article
Full-text available
The access to the abdomen and the creation of a pneumoperitoneum is an initial and particularly critical step of minimally invasive laparoscopic procedures. Insertion instruments such as the Veress needle need to be introduced blindly into the abdominal cavity, which is associated with inadvertent visceral and vascular injuries. To ensure safe posi...
Article
Full-text available
Cerebrovascular diseases such as stenosis, atherosclerosis or distention of the carotid artery are accountable for about 1 million death per year across Europe. Diagnostic tools like ultrasound imaging, angiography or magnetic resonance-based imaging require specific hardware and highly depend on the experience of the examining clinician. In contra...
Conference Paper
Full-text available
Cerebrovascular diseases such as stenosis of the carotid artery are accountable for about 1 million death per year across Europe. Diagnostic tools like US, angiography or MRI require specific hardware and highly depend on the experience of the examining clinician. In contrast auscultation with a stethoscope can be used to screen for bruits - audibl...
Conference Paper
Full-text available
This paper presents an improved solution for vibroarthrographic measurements. Four different setups for sensor attachment to the knee were assessed with a focus on the stability and reproducibility of the measured signals. By means of power spectral density estimates, the main signal components were compared and afterwards evaluated by conducting a...
Article
Full-text available
Robotic surgeries are still limited with respect to the surgeon’s natural senses. The tactile sense is exceptional important in conventional clinical procedures. To identify critical structures inside the tissue, palpation is a commonly used technique in conventional open surgeries. The underlying organ or pathological structures conditions (health...
Conference Paper
IMPACT - the Individualized Medical Procedures And Cancer Treatment training network will prepare the next generation of entrepreneurial researchers, educators and leaders through worldwide interdisciplinary cooperation between clinical users and technologists. IMPACT will provide the base for the European Union to lead the development of what we c...
Conference Paper
The thyroid is one of the largest endocrine glands in the human body and is involved in protein synthesis as well as in controlling the human energy sources usage. It is very important to monitor the state of thyroid over time as most of the thyroid diseases like Graves’ disease, and thyroid cancer involves change in shape and size of the thyroid....
Article
Wireless communication is an essential part of body area networks (BANs). Ultrasound waves can be used as an alternative to radio frequency (RF) transmission. Nowadays RF telemetry is an established solution and there are several com-panies selling their products. In contrast, for medical implants the use of ultrasound telemetry is an unconventiona...

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Project (1)
Project
In minimally invasive procedures, navigation of Medical Interventional Device (MID) is a challenging task. The clinicians' experience is an essential pre-requirement to complete the procedures without damaging structures or organs. Medical imaging can assist the procedure, which can, however, lead to inaccuracies caused by modality dependent artifacts. Sensor-based solutions have been proposed for improving the accuracy by acquiring additional guidance information from MIDs. This typically requires the sensors to be embedded in the MID tip, leading to direct tissue contact, sterilization issues, and added complexity and cost. Considering these issues, we came up with a new concept for acquiring additional complementary information for guiding MIDs in minimally invasive procedures. This concept is based on using acoustic emission (AE) with a sensor connected at the proximal end of the tool in order to capture information, non-invasively outside the body, concerning the dynamics occurring between the tip of the tool and the tissue. The audio signal resulting from the MID-tissue interactions starting at the tip of the instrument naturally propagates through its shaft so that they can be picked up and detected by an audio sensor located at the proximal end of the instrument. This signal can be then processed in order to extract useful guidance information that can be then mapped into feedback to surgeons during minimally invasive procedures. The main advantage of this novel approach is that no sensor is needed to be placed in direct contact with the patient organs and tissues. The development of an AE guidance solution would allow us to acquire information from conventional MIDs, as a sort of plug-and-play device without the necessity of rebuild specialized instruments and use the already existing ones. This should result in less complicated solutions than the existing one, allowing a faster clinical approval. During the last years, we have tested the SurAG approach with several MIDs such as biopsy needles, guide wires, and laparoscopic and robotic tools, and we have extracted different types of information using advanced signal processing and classification procedures.