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Katzenschlager S, Schneider NRE, Weilbacher F, Weigand MA, Popp E. Evaluating time until ligation in a novel tourniquet - A crossover randomized-controlled trial. Am J Emerg Med 2024; 79:97-104. [PMID: 38412670 DOI: 10.1016/j.ajem.2024.02.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 01/16/2024] [Accepted: 02/17/2024] [Indexed: 02/29/2024] Open
Abstract
INTRODUCTION AND AIM Severe external hemorrhage is a significant reason for morbidity and mortality in adults; thus, the swift and correct application of a tourniquet by laypersons can be lifesaving. We conducted this randomized-controlled cross-over study to investigate the use of a novel tourniquet. METHODS Participants were recruited at the Heidelberg University Hospital. Eligible participants were ≥ 18 years old with a medical background but without prior experience in applying a tourniquet. Participants were 1:1 randomized to the intervention group (PAX tourniquet) or the control group (SAM or CAT tourniquet). In the control group, participants underwent another randomization to either the SAM or CAT tourniquet without a predefined allocation ratio. Hyperspectral measurements were undertaken (i) before ligation, (ii) 30 s after ligation, and (iii) 30 s after the reopening of the tourniquet. The primary outcome was time until ligation before crossover between the respective groups. The analysis of secondary endpoints included all attempts to assess a possible learning effect, intraoperator variability, and hyperspectral measurements. Participants were crossed to the other study group after a brief wash-out phase. RESULTS In total, 50 participants were recruited, resulting in 100 attempts. A success rate of 98% was observed across the study population. Time until ligation was 49 s and 56 s (p = 0.572) in the intervention and control group, respectively. However, there was a significant difference between the PAX and SAM (54 vs 75 s; p = 0.037) and the SAM and CAT tourniquet (75 vs. 47 s; p = 0.015). Further, we observed a significant learning effect in participants allocated to the control group first, with a median reduction of 9 s in the time until ligation. Hyperspectral measurements showed a significant decrease in perfusion and tissue oxygenation after ligation. Further, a significant increase in perfusion and tissue oxygenation was found after reopening the tourniquet compared to the baseline measurement. CONCLUSION The novel PAX tourniquet can be applied quickly and effectively by medical personnel without prior experience in applying a tourniquet.
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Affiliation(s)
| | - Niko R E Schneider
- University of Southampton, Medical Faculty Campus Kassel, Department of Anaesthesiology and Critical Care Medicine.
| | - Frank Weilbacher
- Heidelberg University, Medical Faculty Heidelberg, Department of Anesthesiology.
| | - Markus A Weigand
- Heidelberg University, Medical Faculty Heidelberg, Department of Anesthesiology.
| | - Erik Popp
- Heidelberg University, Medical Faculty Heidelberg, Department of Anesthesiology.
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2
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Felicio-Briegel A, Linek M, Sroka R, Rühm A, Freymüller C, Stocker M, Baumeister P, Reichel C, Volgger V. Hyperspectral imaging for monitoring of free flaps of the oral cavity: A feasibility study. Lasers Surg Med 2024; 56:165-174. [PMID: 38247042 DOI: 10.1002/lsm.23756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 12/23/2023] [Accepted: 12/26/2023] [Indexed: 01/23/2024]
Abstract
OBJECTIVES Hyperspectral imaging (HSI) provides spectral information about hemoglobin, water and oxygen supply and has thus great potential in perfusion monitoring. The aim of the present study was to investigate the feasibility of HSI in the postoperative monitoring of intraoral free flaps. METHODS The 14 patients receiving reconstructive head and neck surgery with a radial forearm free flap were included. HSI was performed intraoperatively (t0), on Day 1 (t1), 2 (t2), 3-6 (t3), 7-9 (t4), 10-11 (t5) and 12-15 (t6) postoperatively. Flap tissue perfusion was assessed on defined regions of interest by calculating the perfusion indices Tissue Hemoglobin Index (THI), hemoglobin oxygenation (StO2 ), Near Infrared Perfusion Index (NIR Perfusion Index) and Tissue Water Index (TWI). RESULTS Image quality varied depending on location of the flap and time of measurement. StO2 was >50 intraoperatively and >40 on t1 for all patients. A significant difference was found solely for TWI between t0 and t2 and t0 and t4. No flap loss occurred. CONCLUSIONS The use of HSI in the monitoring of intraoral flaps is feasible and might become a valuable addition to the current clinical examination of free flaps.
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Affiliation(s)
| | - Matthäus Linek
- Laser-Forschungslabor, LIFE Center, University Hospital, LMU Munich, Planegg, Germany
| | - Ronald Sroka
- Laser-Forschungslabor, LIFE Center, University Hospital, LMU Munich, Planegg, Germany
- Department of Urology, University Hospital, LMU Munich, Munich, Germany
| | - Adrian Rühm
- Laser-Forschungslabor, LIFE Center, University Hospital, LMU Munich, Planegg, Germany
- Department of Urology, University Hospital, LMU Munich, Munich, Germany
| | - Christian Freymüller
- Laser-Forschungslabor, LIFE Center, University Hospital, LMU Munich, Planegg, Germany
| | - Magdalena Stocker
- Department of Otorhinolaryngology, University Hospital Salzburg, Salzburg, Austria
| | - Philipp Baumeister
- Department of Otorhinolaryngology, University Hospital, LMU Munich, Munich, Germany
| | - Christoph Reichel
- Department of Otorhinolaryngology, University Hospital, LMU Munich, Munich, Germany
| | - Veronika Volgger
- Department of Otorhinolaryngology, University Hospital, LMU Munich, Munich, Germany
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3
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Saknite I, Kwun S, Zhang K, Hood A, Chen F, Kangas L, Kortteisto P, Kukkonen A, Spigulis J, Tkaczyk ER. Hyperspectral imaging to accurately segment skin erythema and hyperpigmentation in cutaneous chronic graft-versus-host disease. JOURNAL OF BIOPHOTONICS 2023; 16:e202300009. [PMID: 36942511 DOI: 10.1002/jbio.202300009] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 03/15/2023] [Accepted: 03/17/2023] [Indexed: 06/18/2023]
Abstract
In 51 lesions from 15 patients with the inflammatory skin condition chronic graft-versus-host-disease, hyperspectral imaging accurately delineated active erythema and post-inflammatory hyperpigmentation. The method was validated by dermatologist-approved confident delineations of only definitely affected and definitely unaffected areas in photographs. A prototype hyperspectral imaging system acquired a 2.5 × 3.5 cm2 area of skin at 120 wavelengths in the 450-850 nm range. Unsupervised extraction of unknown absorbers by endmember analysis achieved a comparable accuracy to that of supervised extraction of known absorbers (melanin, hemoglobin) by chromophore mapping: 0.78 (IQR: 0.39-0.85) vs. 0.83 (0.53-0.91) to delineate erythema and 0.74 (0.57-0.87) vs. 0.73 (0.52-0.84) to delineate hyperpigmentation. Both algorithms achieved higher specificity than sensitivity. Whereas a trained human confidently marked a median of 7% of image pixels, unsupervised and supervised algorithms delineated a median of 14% and 27% pixels. Hyperspectral imaging could overcome a fundamental practice gap of distinguishing active from inactive manifestations of inflammatory skin disease.
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Affiliation(s)
- Inga Saknite
- Vanderbilt Dermatology Translational Research Clinic, Department of Dermatology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
- Biophotonics Laboratory, Institute of Atomic Physics and Spectroscopy, University of Latvia, Riga, Latvia
| | - Shinwho Kwun
- Vanderbilt Dermatology Translational Research Clinic, Department of Dermatology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Kathy Zhang
- Vanderbilt Dermatology Translational Research Clinic, Department of Dermatology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Alexis Hood
- Vanderbilt Dermatology Translational Research Clinic, Department of Dermatology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Fuyao Chen
- Vanderbilt Dermatology Translational Research Clinic, Department of Dermatology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | | | | | | | - Janis Spigulis
- Biophotonics Laboratory, Institute of Atomic Physics and Spectroscopy, University of Latvia, Riga, Latvia
| | - Eric R Tkaczyk
- Vanderbilt Dermatology Translational Research Clinic, Department of Dermatology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
- Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee, USA
- Vanderbilt-Ingram Cancer Center, Nashville, Tennessee, USA
- Dermatology Service and Research Service, Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, Tennessee, USA
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Studier-Fischer A, Seidlitz S, Sellner J, Bressan M, Özdemir B, Ayala L, Odenthal J, Knoedler S, Kowalewski KF, Haney CM, Salg G, Dietrich M, Kenngott H, Gockel I, Hackert T, Müller-Stich BP, Maier-Hein L, Nickel F. HeiPorSPECTRAL - the Heidelberg Porcine HyperSPECTRAL Imaging Dataset of 20 Physiological Organs. Sci Data 2023; 10:414. [PMID: 37355750 PMCID: PMC10290660 DOI: 10.1038/s41597-023-02315-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 06/15/2023] [Indexed: 06/26/2023] Open
Abstract
Hyperspectral Imaging (HSI) is a relatively new medical imaging modality that exploits an area of diagnostic potential formerly untouched. Although exploratory translational and clinical studies exist, no surgical HSI datasets are openly accessible to the general scientific community. To address this bottleneck, this publication releases HeiPorSPECTRAL ( https://www.heiporspectral.org ; https://doi.org/10.5281/zenodo.7737674 ), the first annotated high-quality standardized surgical HSI dataset. It comprises 5,758 spectral images acquired with the TIVITA® Tissue and annotated with 20 physiological porcine organs from 8 pigs per organ distributed over a total number of 11 pigs. Each HSI image features a resolution of 480 × 640 pixels acquired over the 500-1000 nm wavelength range. The acquisition protocol has been designed such that the variability of organ spectra as a function of several parameters including the camera angle and the individual can be assessed. A comprehensive technical validation confirmed both the quality of the raw data and the annotations. We envision potential reuse within this dataset, but also its reuse as baseline data for future research questions outside this dataset. Measurement(s) Spectral Reflectance Technology Type(s) Hyperspectral Imaging Sample Characteristic - Organism Sus scrofa.
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Affiliation(s)
- Alexander Studier-Fischer
- Department of General, Visceral, and Transplantation Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Silvia Seidlitz
- Division of Intelligent Medical Systems, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Faculty of Mathematics and Computer Science, Heidelberg University, Heidelberg, Germany
- HIDSS4Health - Helmholtz Information and Data Science School for Health, Karlsruhe, Heidelberg, Germany
- National Center for Tumor Diseases (NCT) Heidelberg, a partnership between DKFZ and Heidelberg University Hospital, Heidelberg, Germany
| | - Jan Sellner
- Division of Intelligent Medical Systems, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Faculty of Mathematics and Computer Science, Heidelberg University, Heidelberg, Germany
- HIDSS4Health - Helmholtz Information and Data Science School for Health, Karlsruhe, Heidelberg, Germany
| | - Marc Bressan
- Department of General, Visceral, and Transplantation Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Berkin Özdemir
- Department of General, Visceral, and Transplantation Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Leonardo Ayala
- Division of Intelligent Medical Systems, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Medical Faculty, Heidelberg University, Heidelberg, Germany
| | - Jan Odenthal
- Department of General, Visceral, and Transplantation Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Samuel Knoedler
- Department of General, Visceral, and Transplantation Surgery, Heidelberg University Hospital, Heidelberg, Germany
- Division of Plastic Surgery, Department of Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Karl-Friedrich Kowalewski
- Department of Urology, Medical Faculty of Mannheim at the University of Heidelberg, Mannheim, Germany
| | - Caelan Max Haney
- Department of General, Visceral, and Transplantation Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Gabriel Salg
- Department of General, Visceral, and Transplantation Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Maximilian Dietrich
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Hannes Kenngott
- Department of General, Visceral, and Transplantation Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Ines Gockel
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, Leipzig University Hospital, Leipzig, Germany
| | - Thilo Hackert
- Department of General, Visceral, and Transplantation Surgery, Heidelberg University Hospital, Heidelberg, Germany
- Department of General, Visceral, and Thoracic Surgery, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Beat Peter Müller-Stich
- Department of General, Visceral, and Transplantation Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Lena Maier-Hein
- Division of Intelligent Medical Systems, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Faculty of Mathematics and Computer Science, Heidelberg University, Heidelberg, Germany
- HIDSS4Health - Helmholtz Information and Data Science School for Health, Karlsruhe, Heidelberg, Germany
- National Center for Tumor Diseases (NCT) Heidelberg, a partnership between DKFZ and Heidelberg University Hospital, Heidelberg, Germany
| | - Felix Nickel
- Department of General, Visceral, and Transplantation Surgery, Heidelberg University Hospital, Heidelberg, Germany.
- HIDSS4Health - Helmholtz Information and Data Science School for Health, Karlsruhe, Heidelberg, Germany.
- Department of General, Visceral, and Thoracic Surgery, University Hospital Hamburg-Eppendorf, Hamburg, Germany.
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Traber J, Wild T, Marotz J, Berli MC, Franco-Obregón A. Concurrent Optical- and Magnetic-Stimulation-Induced Changes on Wound Healing Parameters, Analyzed by Hyperspectral Imaging: An Exploratory Case Series. Bioengineering (Basel) 2023; 10:750. [PMID: 37508777 PMCID: PMC10376418 DOI: 10.3390/bioengineering10070750] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 05/31/2023] [Accepted: 06/14/2023] [Indexed: 07/30/2023] Open
Abstract
The effects of concurrent optical and magnetic stimulation (COMS) therapy on wound-healing-related parameters, such as tissue oxygenation and water index, were analyzed by hyperspectral imaging: an exploratory case series. Background: Oedema and inadequate perfusion have been identified as key factors in delayed wound healing and have been linked to reduced mitochondrial respiration. Targeting mitochondrial dysfunction is a promising approach in the treatment of therapy refractory wounds. This sub-study aimed to investigate the effects of concurrent optical and magnetic stimulation (COMS) on oedema and perfusion through measuring tissue oxygenation and water index, using hyperspectral imaging. Patients and methods: In a multi-center, prospective, comparative clinical trial, eleven patients with chronic leg and foot ulcers were treated with COMS additively to Standard of Care (SOC). Hyperspectral images were collected during patient visits before and after treatment to assess short- and long-term hemodynamic and immunomodulatory effects through changes in tissue oxygenation and water index. Results: The average time for wound onset in the eleven patients analyzed was 183 days, with 64% of them being considered unresponsive to SOC. At week 12, the rate of near-complete and complete wound closure was 64% and 45%, respectively. COMS therapy with SOC resulted in an increased short-term tissue oxygenation over the 8-week treatment phase, with oxygen levels decreasing in-between patient visits. The study further found a decrease in tissue water content after the therapy, with a general accumulation of water levels in-between patient visits. This study's long-term analysis was hindered by the lack of absolute values in hyperspectral imaging and the dynamic nature of patient parameters during visits, resulting in high interpatient and intervisit variability. Conclusions: This study showed that COMS therapy as an adjunct to SOC had a positive short-term effect on inflammation and tissue oxygenation in chronic wounds of various etiologies. These results further supported the body of evidence for safety and effectiveness of COMS therapy as a treatment option, especially for stagnant wounds that tended to stay in the inflammatory phase and required efficient phase transition towards healing.
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Affiliation(s)
- Jürg Traber
- Venenklinik Bellevue, Brückenstrasse 9, 8280 Kreuzlingen, Switzerland
| | - Thomas Wild
- Clinic of Plastic, Hand and Aesthetic Surgery Burn Center, BG Clinic Bergmannstrost, 06112 Halle (Saale), Germany
- Medical University Halle, Outpatient and Operating Center, Martin-Luther University Halle (Saale), 06112 Halle (Saale), Germany
- Institute of Applied Bioscience and Process Management Head of Education Course "Academic Wound Consultant", University of Applied Science Anhalt, 06366 Koethen, Germany
| | - Jörg Marotz
- BG-Klinikum Bergmannstrost, 06112 Halle (Saale), Germany
| | - Martin C Berli
- Department of Surgery, Spital Limmattal, 8952 Schlieren, Switzerland
| | - Alfredo Franco-Obregón
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228, Singapore
- Institute of Health Technology and Innovation (iHealthtech), National University of Singapore, Singapore 117599, Singapore
- Biolonic Currents Electromagnetic Pulsing Systems Laboratory (BICEPS), National University of Singapore, Singapore 117599, Singapore
- Competence Center for Applied Biotechnology and Molecular Medicine, University of Zürich, 8057 Zürich, Switzerland
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6
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Stern M, Schremmer J, Scharm S, Baasen S, Heinen Y, Sansone R, Polzin A, Jung C, Heiss C, Kelm M, Busch L. Microvascular tissue perfusion after postcatheterization pseudoaneurysm treatment. Clin Hemorheol Microcirc 2022; 82:275-282. [PMID: 35938240 DOI: 10.3233/ch-221438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND Femoral pseudoaneurysm (PSA) is a severe complication after endovascular procedures. Ultrasound-guided manual compression (MC) and percutaneous thrombin injection (TI) are frequently used treatments. MC is less effective, TI may cause thromboembolic events. OBJECTIVE Up to date, there is no data regarding impairment of microvascular tissue perfusion after PSA treatment. METHODS In this single-center, prospective study 22 patients with PSA were included. We compared macro- and microcirculatory perfusion in the treated and untreated leg at baseline before, after and one day after treatment. Leg perfusion was assessed with ultrasound and ankle-brachial index (ABI). Microcirculatory perfusion of the feet was measured with a near-infrared spectroscopy (NIRS) camera generating StO2-tissue-maps. RESULTS Successful PSA thrombosis was achieved in 16 (100%) patients in TI group and in 4 (66.7%) patients in MC group. There was no evidence of arterial thrombi on ultrasound and the ABI did not differ between groups. NIRS StO2-tissue-maps of the feet showed no significant difference in both groups concerning the treated (p = 0.121) or the untreated (p = 0.198) leg during follow up. CONCLUSIONS In this small exploratory study, there was no evidence of micro- and macrovascular tissue perfusion impairment after treatment of postcatheterization femoral pseudoaneurysm with thrombin injection underscoring the safety of this approach.
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Affiliation(s)
- M Stern
- Department of Cardiology, Pulmonology, and Vascular Medicine, University Duesseldorf, Medical Faculty, Duesseldorf, Germany
| | - J Schremmer
- Department of Cardiology, Pulmonology, and Vascular Medicine, University Duesseldorf, Medical Faculty, Duesseldorf, Germany
| | - S Scharm
- Department of Cardiology, Pulmonology, and Vascular Medicine, University Duesseldorf, Medical Faculty, Duesseldorf, Germany
| | - S Baasen
- Department of Cardiology, Pulmonology, and Vascular Medicine, University Duesseldorf, Medical Faculty, Duesseldorf, Germany
| | - Y Heinen
- Department of Cardiology, Pulmonology, and Vascular Medicine, University Duesseldorf, Medical Faculty, Duesseldorf, Germany
| | - R Sansone
- Department of Cardiology, Pulmonology, and Vascular Medicine, University Duesseldorf, Medical Faculty, Duesseldorf, Germany
| | - A Polzin
- Department of Cardiology, Pulmonology, and Vascular Medicine, University Duesseldorf, Medical Faculty, Duesseldorf, Germany
| | - C Jung
- Department of Cardiology, Pulmonology, and Vascular Medicine, University Duesseldorf, Medical Faculty, Duesseldorf, Germany
| | - C Heiss
- Department of Clinical and Experimental Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom.,Department of Vascular Medicine, Surrey and Sussex NHS Healthcare Trust, Redhill, United Kingdom
| | - M Kelm
- Department of Cardiology, Pulmonology, and Vascular Medicine, University Duesseldorf, Medical Faculty, Duesseldorf, Germany.,Cardiovascular Research Institute Duesseldorf (CARID)Duesseldorf, Germany
| | - L Busch
- Department of Cardiology, Pulmonology, and Vascular Medicine, University Duesseldorf, Medical Faculty, Duesseldorf, Germany
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Katzenschlager S, Dietrich M, Peterstorfer F, Manten K, von der Forst M, Behnisch R, Leowardi C, Studier-Fischer A, Nickel F, Weigand MA, Weilbacher F, Popp E. Implementation of hyperspectral imaging in a trauma resuscitation room: a randomized controlled trial. Scand J Trauma Resusc Emerg Med 2022; 30:66. [PMID: 36494726 PMCID: PMC9733002 DOI: 10.1186/s13049-022-01057-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 11/30/2022] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Hyperspectral imaging (HSI) is a novel imaging technology with the ability to assess microcirculatory impairment. We aimed to assess feasibility of performing HSI, a noninvasive, contactless method to assess microcirculatory alterations, during trauma resuscitation care. METHODS This randomized controlled clinical trial was conducted in a dedicated trauma resuscitation room of a level one trauma center. We included adult patients who were admitted to the trauma resuscitation room. Patients were allocated in a 1:1 ratio to the HSI group (intervention) or control group. In addition to the standard of care, patients in the intervention group had two hyperspectral recordings (HSR) of their hand palm taken. Primary outcomes were the treatment duration of the primary survey (until end of ABCDE-evaluation, ultrasound and evaluation by the trauma team) and the total resuscitation room care (until transport to definitive care) as well as the ability to perform measurements from all HSR. Secondary outcomes were analyses from the intervention group compared to HSI measurements of 26 healthy volunteers including an analysis based on the ISS (Injury severity score) (< 16 vs. ≥ 16). Care givers, and those assessing the outcomes were blinded to group assignment. RESULTS Our final analysis included 51 patients, with 25 and 26 allocated to the control and intervention group, respectively. There was a statistically significant shorter median duration of the primary survey in the control group (03:22 min [Q1-Q3 03:00-03:51]) compared to the intervention group (03:59 min [Q1-Q3 03:29-04:35]) with a difference of -37 s (95% CI -66 to -12). Total resuscitation room care was longer in the control group, but without significance: 60 s (95% CI -60 to 180). From 52 HSI, we were able to perform hyperspectral measurements on all images, with significant differences between injured patients and healthy volunteers. CONCLUSION HSI proved to be feasible during resuscitation room care and can provide valuable information on the microcirculatory state. Trial registration DRKS DRKS00024047- www.drks.de . Registered on 13th April 2021.
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Affiliation(s)
- Stephan Katzenschlager
- grid.5253.10000 0001 0328 4908Department of Anesthesiology, Heidelberg University Hospital, Im Neuenheimer Feld 420, 69120 Heidelberg, Germany
| | - Maximilian Dietrich
- grid.5253.10000 0001 0328 4908Department of Anesthesiology, Heidelberg University Hospital, Im Neuenheimer Feld 420, 69120 Heidelberg, Germany
| | - Franziska Peterstorfer
- grid.5253.10000 0001 0328 4908Department of Anesthesiology, Heidelberg University Hospital, Im Neuenheimer Feld 420, 69120 Heidelberg, Germany
| | - Katharina Manten
- grid.5253.10000 0001 0328 4908Department of Anesthesiology, Heidelberg University Hospital, Im Neuenheimer Feld 420, 69120 Heidelberg, Germany
| | - Maik von der Forst
- grid.5253.10000 0001 0328 4908Department of Anesthesiology, Heidelberg University Hospital, Im Neuenheimer Feld 420, 69120 Heidelberg, Germany
| | - Rouven Behnisch
- grid.7700.00000 0001 2190 4373Institute of Medical Biometry, Heidelberg University, Heidelberg, Germany
| | - Christine Leowardi
- grid.5253.10000 0001 0328 4908Department of General, Visceral, and Transplantation Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Alexander Studier-Fischer
- grid.5253.10000 0001 0328 4908Department of General, Visceral, and Transplantation Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Felix Nickel
- grid.5253.10000 0001 0328 4908Department of General, Visceral, and Transplantation Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Markus A. Weigand
- grid.5253.10000 0001 0328 4908Department of Anesthesiology, Heidelberg University Hospital, Im Neuenheimer Feld 420, 69120 Heidelberg, Germany
| | - Frank Weilbacher
- grid.5253.10000 0001 0328 4908Department of Anesthesiology, Heidelberg University Hospital, Im Neuenheimer Feld 420, 69120 Heidelberg, Germany
| | - Erik Popp
- grid.5253.10000 0001 0328 4908Department of Anesthesiology, Heidelberg University Hospital, Im Neuenheimer Feld 420, 69120 Heidelberg, Germany
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8
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Zhang L, Huang D, Chen X, Zhu L, Chen X, Xie Z, Huang G, Gao J, Shi W, Cui G. Visible near-infrared hyperspectral imaging and supervised classification for the detection of small intestinal necrosis tissue in vivo. BIOMEDICAL OPTICS EXPRESS 2022; 13:6061-6080. [PMID: 36733734 PMCID: PMC9872898 DOI: 10.1364/boe.470202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 09/23/2022] [Accepted: 09/26/2022] [Indexed: 06/18/2023]
Abstract
Complete recognition of necrotic areas during small bowel tissue resection remains challenging due to the lack of optimal intraoperative aid identification techniques. This research utilizes hyperspectral imaging techniques to automatically distinguish normal and necrotic areas of small intestinal tissue. Sample data were obtained from the animal model of small intestinal tissue of eight Japanese large-eared white rabbits developed by experienced physicians. A spectral library of normal and necrotic regions of small intestinal tissue was created and processed using six different supervised classification algorithms. The results show that hyperspectral imaging combined with supervised classification algorithms can be a suitable technique to automatically distinguish between normal and necrotic areas of small intestinal tissue. This new technique could aid physicians in objectively identify normal and necrotic areas of small intestinal tissue.
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Affiliation(s)
- LeChao Zhang
- College of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun, Jilin, 130000, China
- Zhongshan Research Institute, Changchun University of Science and Technology, Zhongshan, Guangdong, 528400, China
| | - DanFei Huang
- College of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun, Jilin, 130000, China
- Zhongshan Research Institute, Changchun University of Science and Technology, Zhongshan, Guangdong, 528400, China
| | - XiaoJing Chen
- College of Electrical and Electronic Engineering, Wenzhou University, Wenzhou, Zhejiang, 325000, China
| | - LiBin Zhu
- Pediatric General Surgery, The Second Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China
| | - XiaoQing Chen
- Pediatric General Surgery, The Second Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China
| | - ZhongHao Xie
- College of Electrical and Electronic Engineering, Wenzhou University, Wenzhou, Zhejiang, 325000, China
| | - GuangZao Huang
- College of Electrical and Electronic Engineering, Wenzhou University, Wenzhou, Zhejiang, 325000, China
| | - JunZhao Gao
- College of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun, Jilin, 130000, China
- Zhongshan Research Institute, Changchun University of Science and Technology, Zhongshan, Guangdong, 528400, China
| | - Wen Shi
- College of Electrical and Electronic Engineering, Wenzhou University, Wenzhou, Zhejiang, 325000, China
| | - GuiHua Cui
- College of Electrical and Electronic Engineering, Wenzhou University, Wenzhou, Zhejiang, 325000, China
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Abstract
OBJECTIVE To analyze the blood oxygen concentrations (StO 2 ) of different stages of pressure injury (PI) tissue using hyperspectral images to serve as a guideline for the treatment and care of PIs. METHODS This study used a prospective design. A total of 30 patients with sacral PIs were recruited from the rehabilitation ward of a teaching hospital. The authors used a hyperspectral detector to collect wound images and the Beer-Lambert law to estimate changes in tissue StO 2 in different stages of PI. RESULTS The tissue StO 2 of healthy skin and that of stage 1 PI skin were similar, whereas the tissue StO 2 of the wound in stage 2 PIs was significantly higher than that of healthy skin and scabbed tissue (medians, 82.5%, 74.4%, and 68.3%; P < .05). In stage 3 PIs, StO 2 was highest in subcutaneous tissue and adipose tissue (82.5%) and lowest in peripheral scabs (68.35%). The tissue StO 2 was highest in subcutaneous tissue in stage 4 PIs, and this tissue was red in the hyperspectral spectrum. The scab-covered area of unstageable PIs had the lowest StO 2 of all PI tissue types (median, 44.3%). CONCLUSIONS Hyperspectral imaging provides physiologic information on wound microcirculation, which can enable better evaluation of healing status. Assessing tissue StO 2 data can provide a clinical index of wound healing.
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Spectral organ fingerprints for machine learning-based intraoperative tissue classification with hyperspectral imaging in a porcine model. Sci Rep 2022; 12:11028. [PMID: 35773276 PMCID: PMC9247052 DOI: 10.1038/s41598-022-15040-w] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 06/16/2022] [Indexed: 12/26/2022] Open
Abstract
Visual discrimination of tissue during surgery can be challenging since different tissues appear similar to the human eye. Hyperspectral imaging (HSI) removes this limitation by associating each pixel with high-dimensional spectral information. While previous work has shown its general potential to discriminate tissue, clinical translation has been limited due to the method’s current lack of robustness and generalizability. Specifically, the scientific community is lacking a comprehensive spectral tissue atlas, and it is unknown whether variability in spectral reflectance is primarily explained by tissue type rather than the recorded individual or specific acquisition conditions. The contribution of this work is threefold: (1) Based on an annotated medical HSI data set (9059 images from 46 pigs), we present a tissue atlas featuring spectral fingerprints of 20 different porcine organs and tissue types. (2) Using the principle of mixed model analysis, we show that the greatest source of variability related to HSI images is the organ under observation. (3) We show that HSI-based fully-automatic tissue differentiation of 20 organ classes with deep neural networks is possible with high accuracy (> 95%). We conclude from our study that automatic tissue discrimination based on HSI data is feasible and could thus aid in intraoperative decisionmaking and pave the way for context-aware computer-assisted surgery systems and autonomous robotics.
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11
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Calin MA, Parasca SV. Automatic detection of basal cell carcinoma by hyperspectral imaging. JOURNAL OF BIOPHOTONICS 2022; 15:e202100231. [PMID: 34427393 DOI: 10.1002/jbio.202100231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 08/19/2021] [Indexed: 06/13/2023]
Abstract
The purpose of this study was to test the ability of hyperspectral imaging (HSI) combined with unsupervised anomaly detectors to automatically differentiate basal cell carcinoma (BCC) from normal skin. Hyperspectral images of the face of a female patient with a BCC of the lower lip were acquired using a visible/near-infrared HSI system and two anomaly detection algorithms (Reed-Xiaoli and Reed-Xiaoli/Uniform Target hybrid anomaly detectors) were used to detect pathological tissue from normal skin. The results revealed that the receiver operating characteristic curve of the Reed-Xiaoli/Uniform Target hybrid detector was higher than that of the Reed-Xiaoli detector in the range of false positive rates between 0 and 0.8. The area under curve values were good (0.7074 and 0.8607, respectively) with Reed-Xiaoli/Uniform Target hybrid detector performing better. In conclusion, HSI combined with either of two anomaly detectors can play a promising role in the automated screening of BCC.
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Affiliation(s)
- Mihaela Antonina Calin
- Optoelectronic Methods for Biomedical Applications Department, National Institute of Research and Development for Optoelectronics INOE 2000, Magurele, Ilfov, Romania
| | - Sorin Viorel Parasca
- Plastic and Reconstructive Surgery Department, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
- Emergency Clinical Hospital for Plastic, Reconstructive Surgery and Burns, Bucharest, Romania
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12
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Dietrich M, Özdemir B, Gruneberg D, Petersen C, Studier-Fischer A, von der Forst M, Schmitt FCF, Fiedler MO, Nickel F, Müller-Stich BP, Brenner T, Weigand MA, Uhle F, Schmidt K. Hyperspectral Imaging for the Evaluation of Microcirculatory Tissue Oxygenation and Perfusion Quality in Haemorrhagic Shock: A Porcine Study. Biomedicines 2021; 9:1829. [PMID: 34944645 PMCID: PMC8698916 DOI: 10.3390/biomedicines9121829] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 11/27/2021] [Accepted: 11/29/2021] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND The ultimate goal of haemodynamic therapy is to improve microcirculatory tissue and organ perfusion. Hyperspectral imaging (HSI) has the potential to enable noninvasive microcirculatory monitoring at bedside. METHODS HSI (Tivita® Tissue System) measurements of tissue oxygenation, haemoglobin, and water content in the skin (ear) and kidney were evaluated in a double-hit porcine model of major abdominal surgery and haemorrhagic shock. Animals of the control group (n = 7) did not receive any resuscitation regime. The interventional groups were treated exclusively with either crystalloid (n = 8) or continuous norepinephrine infusion (n = 7). RESULTS Haemorrhagic shock led to a drop in tissue oxygenation parameters in all groups. These correlated with established indirect markers of tissue oxygenation. Fluid therapy restored tissue oxygenation parameters. Skin and kidney measurements correlated well. High dose norepinephrine therapy deteriorated tissue oxygenation. Tissue water content increased both in the skin and the kidney in response to fluid therapy. CONCLUSIONS HSI detected dynamic changes in tissue oxygenation and perfusion quality during shock and was able to indicate resuscitation effectivity. The observed correlation between HSI skin and kidney measurements may offer an estimation of organ oxygenation impairment from skin monitoring. HSI microcirculatory monitoring could open up new opportunities for the guidance of haemodynamic management.
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Affiliation(s)
- Maximilian Dietrich
- Department of Anesthesiology, Heidelberg University Hospital, 69120 Heidelberg, Germany; (D.G.); (C.P.); (M.v.d.F.); (F.C.F.S.); (M.O.F.); (M.A.W.); (F.U.)
| | - Berkin Özdemir
- Department of General, Visceral and Transplantation Surgery, Heidelberg University Hospital, 69120 Heidelberg, Germany; (B.Ö.); (A.S.-F.); (F.N.); (B.P.M.-S.)
| | - Daniel Gruneberg
- Department of Anesthesiology, Heidelberg University Hospital, 69120 Heidelberg, Germany; (D.G.); (C.P.); (M.v.d.F.); (F.C.F.S.); (M.O.F.); (M.A.W.); (F.U.)
| | - Clara Petersen
- Department of Anesthesiology, Heidelberg University Hospital, 69120 Heidelberg, Germany; (D.G.); (C.P.); (M.v.d.F.); (F.C.F.S.); (M.O.F.); (M.A.W.); (F.U.)
| | - Alexander Studier-Fischer
- Department of General, Visceral and Transplantation Surgery, Heidelberg University Hospital, 69120 Heidelberg, Germany; (B.Ö.); (A.S.-F.); (F.N.); (B.P.M.-S.)
| | - Maik von der Forst
- Department of Anesthesiology, Heidelberg University Hospital, 69120 Heidelberg, Germany; (D.G.); (C.P.); (M.v.d.F.); (F.C.F.S.); (M.O.F.); (M.A.W.); (F.U.)
| | - Felix C. F. Schmitt
- Department of Anesthesiology, Heidelberg University Hospital, 69120 Heidelberg, Germany; (D.G.); (C.P.); (M.v.d.F.); (F.C.F.S.); (M.O.F.); (M.A.W.); (F.U.)
| | - Mascha O. Fiedler
- Department of Anesthesiology, Heidelberg University Hospital, 69120 Heidelberg, Germany; (D.G.); (C.P.); (M.v.d.F.); (F.C.F.S.); (M.O.F.); (M.A.W.); (F.U.)
| | - Felix Nickel
- Department of General, Visceral and Transplantation Surgery, Heidelberg University Hospital, 69120 Heidelberg, Germany; (B.Ö.); (A.S.-F.); (F.N.); (B.P.M.-S.)
| | - Beat Peter Müller-Stich
- Department of General, Visceral and Transplantation Surgery, Heidelberg University Hospital, 69120 Heidelberg, Germany; (B.Ö.); (A.S.-F.); (F.N.); (B.P.M.-S.)
| | - Thorsten Brenner
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Essen, University Duisburg-Essen, 45147 Essen, Germany; (T.B.); (K.S.)
| | - Markus A. Weigand
- Department of Anesthesiology, Heidelberg University Hospital, 69120 Heidelberg, Germany; (D.G.); (C.P.); (M.v.d.F.); (F.C.F.S.); (M.O.F.); (M.A.W.); (F.U.)
| | - Florian Uhle
- Department of Anesthesiology, Heidelberg University Hospital, 69120 Heidelberg, Germany; (D.G.); (C.P.); (M.v.d.F.); (F.C.F.S.); (M.O.F.); (M.A.W.); (F.U.)
| | - Karsten Schmidt
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Essen, University Duisburg-Essen, 45147 Essen, Germany; (T.B.); (K.S.)
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Dietrich M, Marx S, von der Forst M, Bruckner T, Schmitt FCF, Fiedler MO, Nickel F, Studier-Fischer A, Müller-Stich BP, Hackert T, Brenner T, Weigand MA, Uhle F, Schmidt K. Hyperspectral imaging for perioperative monitoring of microcirculatory tissue oxygenation and tissue water content in pancreatic surgery - an observational clinical pilot study. Perioper Med (Lond) 2021; 10:42. [PMID: 34847953 PMCID: PMC8638177 DOI: 10.1186/s13741-021-00211-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 07/30/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Hyperspectral imaging (HSI) could provide extended haemodynamic monitoring of perioperative tissue oxygenation and tissue water content to visualize effects of haemodynamic therapy and surgical trauma. The objective of this study was to assess the capacity of HSI to monitor skin microcirculation and possible relations to perioperative organ dysfunction in patients undergoing pancreatic surgery. METHODS The hyperspectral imaging TIVITA® Tissue System was used to evaluate superficial tissue oxygenation (StO2), deeper layer tissue oxygenation (near-infrared perfusion index (NPI)), haemoglobin distribution (tissue haemoglobin index (THI)) and tissue water content (tissue water index (TWI)) in 25 patients undergoing pancreatic surgery. HSI parameters were measured before induction of anaesthesia (t1), after induction of anaesthesia (t2), postoperatively before anaesthesia emergence (t3), 6 h after emergence of anaesthesia (t4) and three times daily (08:00, 14:00, 20:00 ± 1 h) at the palm and the fingertips until the second postoperative day (t5-t10). Primary outcome was the correlation of HSI with perioperative organ dysfunction assessed with the perioperative change of SOFA score. RESULTS Two hundred and fifty HSI measurements were performed in 25 patients. Anaesthetic induction led to a significant increase of tissue oxygenation parameters StO2 and NPI (t1-t2). StO2 and NPI decreased significantly from t2 until the end of surgery (t3). THI of the palm showed a strong correlation with haemoglobin levels preoperatively (t2: r = 0.83, p < 0.001) and 6 h postoperatively (t4: r = 0.71, p = 0.001) but not before anaesthesia emergence (t3: r = 0.35, p = 0.10). TWI of the palm and the fingertip rose significantly between pre- and postoperative measurements (t2-t3). Higher blood loss, syndecan level and duration of surgery were associated with a higher increase of TWI. The perioperative change of HSI parameters (∆t1-t3) did not correlate with the perioperative change of the SOFA score. CONCLUSION This is the first study using HSI skin measurements to visualize tissue oxygenation and tissue water content in patients undergoing pancreatic surgery. HSI was able to measure short-term changes of tissue oxygenation during anaesthetic induction and pre- to postoperatively. TWI indicated a perioperative increase of tissue water content. Perioperative use of HSI could be a useful extension of haemodynamic monitoring to assess the microcirculatory response during haemodynamic therapy and major surgery. TRIAL REGISTRATION German Clinical Trial Register, DRKS00017313 on 5 June 2019.
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Affiliation(s)
- Maximilian Dietrich
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Sebastian Marx
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Maik von der Forst
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Thomas Bruckner
- Institute of Medical Biometry and Informatics, University of Heidelberg, Heidelberg, Germany
| | - Felix C F Schmitt
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Mascha O Fiedler
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Felix Nickel
- Department of General, Visceral and Transplantation Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Alexander Studier-Fischer
- Department of General, Visceral and Transplantation Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Beat P Müller-Stich
- Department of General, Visceral and Transplantation Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Thilo Hackert
- Department of General, Visceral and Transplantation Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Thorsten Brenner
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Markus A Weigand
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Florian Uhle
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Karsten Schmidt
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Essen, University Duisburg-Essen, Essen, Germany.
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Linek M, Felicio-Briegel A, Freymüller C, Rühm A, Englhard AS, Sroka R, Volgger V. Evaluation of hyperspectral imaging to quantify perfusion changes during the modified Allen test. Lasers Surg Med 2021; 54:245-255. [PMID: 34541694 DOI: 10.1002/lsm.23479] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 08/29/2021] [Indexed: 12/20/2022]
Abstract
OBJECTIVES To evaluate the capability of hyperspectral imaging (HSI), a contact-less and noninvasive technology, to monitor perfusion changes of the hand during a modified Allen test (MAT) and cuff occlusion test. Furthermore, the study aimed at obtaining objective perfusion parameters of the hand. METHODS HSI of the hand was performed on 20 healthy volunteers with a commercially available HSI system during a MAT and a cuff occlusion test. Besides gathering red-green-blue (RGB) images, the perfusion parameters tissue hemoglobin index (THI), (superficial tissue) hemoglobin oxygenation (StO2), near-infrared perfusion (NIR), and tissue water index (TWI) were calculated for four different regions of interest on the hand. For the MAT, occlusion (OI; the ratio between the condition during occlusion and before occlusion) and reperfusion (RI; the ratio between the non-occlusion state and the prior occlusion state) indices were calculated for each perfusion parameter. All data were correlated to the clinical findings. RESULTS False-color images showed visible differences between the various perfusion conditions during the MAT and cuff occlusion test. THI, StO2, and NIR behaved as expected from physiology, while TWI did not in the context of this study. During rest, mean THI, StO2, and NIR of the hand were 34 ± 2, 72 ± 9, and 61 ± 6, respectively. The RI for THI showed a roundabout threefold increase after reperfusion of both radial and ulnar artery and was thus, distinctly pronounced when compared with StO2 and NIR (~1.25). The OI was lowest for THI when compared with StO2 and NIR. CONCLUSIONS HSI with its parameters THI, StO2, and NIR proved to be suitable to evaluate perfusion of the hand. By this, it could complement visual inspection during the MAT for evaluating the functionality of the superficial palmary arch before radial or ulnar artery harvest. The presented RI might deliver useful comparative values to detect pathological perfusion disorders at an early stage. As microcirculation monitoring is crucial for many medical issues, HSI shows potential to be used, besides further applications, in the monitoring of (free) flaps and transplants and microcirculation monitoring of critically ill patients.
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Affiliation(s)
- Matthäus Linek
- Laser-Forschungslabor, LIFE Center, University Hospital, LMU Munich, Planegg, Germany
| | | | - Christian Freymüller
- Laser-Forschungslabor, LIFE Center, University Hospital, LMU Munich, Planegg, Germany
| | - Adrian Rühm
- Laser-Forschungslabor, LIFE Center, University Hospital, LMU Munich, Planegg, Germany.,Department of Urology, University Hospital, LMU Munich, Munich, Germany
| | - Anna Sophie Englhard
- Department of Otorhinolaryngology, University Hospital, LMU Munich, Munich, Germany
| | - Ronald Sroka
- Laser-Forschungslabor, LIFE Center, University Hospital, LMU Munich, Planegg, Germany.,Department of Urology, University Hospital, LMU Munich, Munich, Germany
| | - Veronika Volgger
- Department of Otorhinolaryngology, University Hospital, LMU Munich, Munich, Germany
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van Welzen A, Hoch M, Wahl P, Weber F, Rode S, Tietze JK, Boeckmann L, Emmert S, Thiem A. The Response and Tolerability of a Novel Cold Atmospheric Plasma Wound Dressing for the Healing of Split Skin Graft Donor Sites: A Controlled Pilot Study. Skin Pharmacol Physiol 2021; 34:328-336. [PMID: 34365456 PMCID: PMC8619757 DOI: 10.1159/000517524] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 05/19/2021] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Cold atmospheric plasma (CAP) has positive effects on wound healing and antimicrobial properties. However, an ongoing challenge is the development of specific modes of application for different clinical indications. OBJECTIVES We investigated in a prospective pilot study the response and tolerability of a newly developed CAP wound dressing for the acute healing of split skin graft donor sites compared to conventional therapy. METHODS We applied both treatments to each patient (n = 10) for 7 days and measured 4 parameters of wound healing every other day (i.e., 1,440 measurements) using a hyperspectral imaging camera. Additionally, we evaluated the clinical appearance and pain levels reported by the patients. RESULTS The CAP wound dressing was superior to the control (p < 0.001) in the improvement of 3 wound parameters, that is, deep tissue oxygen saturation, hemoglobin distribution, and tissue water distribution. CAP was well tolerated, and pain levels were lower in CAP-treated wound areas. CONCLUSION CAP wound dressing is a promising new tool for acute wound healing.
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Affiliation(s)
- Annika van Welzen
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, Rostock, Germany
| | - Matti Hoch
- Department of Systems Biology and Bioinformatics, University of Rostock, Rostock, Germany
| | | | - Frank Weber
- Department for Biostatistics and Informatics in Medicine, University Medical Center, Rostock, Germany
| | - Susen Rode
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, Rostock, Germany
| | - Julia Katharina Tietze
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, Rostock, Germany
| | - Lars Boeckmann
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, Rostock, Germany
| | - Steffen Emmert
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, Rostock, Germany
| | - Alexander Thiem
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, Rostock, Germany
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Schmidt A, Niesner F, von Woedtke T, Bekeschus S. Hyperspectral Imaging of Wounds Reveals Augmented Tissue Oxygenation Following Cold Physical Plasma Treatment in Vivo. IEEE TRANSACTIONS ON RADIATION AND PLASMA MEDICAL SCIENCES 2021. [DOI: 10.1109/trpms.2020.3009913] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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17
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Kohler LH, Köhler H, Kohler S, Langer S, Nuwayhid R, Gockel I, Spindler N, Osterhoff G. Hyperspectral Imaging (HSI) as a new diagnostic tool in free flap monitoring for soft tissue reconstruction: a proof of concept study. BMC Surg 2021; 21:222. [PMID: 33931056 PMCID: PMC8086299 DOI: 10.1186/s12893-021-01232-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 04/23/2021] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVES Free flap surgery is an essential procedure in soft tissue reconstruction. Complications due to vascular compromise often require revision surgery or flap removal. We present hyperspectral imaging (HSI) as a new tool in flap monitoring to improve sensitivity compared to established monitoring tools. METHODS We performed a prospective observational cohort study including 22 patients. Flap perfusion was assessed by standard clinical parameters, Doppler ultrasound, and HSI on t0 (0 h), t1 (16-28 h postoperatively), and t2 (39-77 h postoperatively). HSI records light spectra from 500 to 1000 nm and provides information on tissue morphology, composition, and physiology. These parameters contain tissue oxygenation (StO2), near-infrared perfusion- (NIR PI), tissue hemoglobin- (THI), and tissue water index (TWI). RESULTS Total flap loss was seen in n = 4 and partial loss in n = 2 cases. Every patient with StO2 or NIR PI below 40 at t1 had to be revised. No single patient with StO2 or NIR PI above 40 at t1 had to be revised. Significant differences between feasable (StO2 = 49; NIR PI = 45; THI = 16; TWI = 56) and flaps with revision surgery [StO2 = 28 (p < 0.001); NIR PI = 26 (p = 0.002); THI = 56 (p = 0.002); TWI = 47 (p = 0.045)] were present in all HSI parameters at t1 and even more significant at t2 (p < 0.0001). CONCLUSION HSI provides valuable data in free flap monitoring. The technique seems to be superior to the gold standard of flap monitoring. StO2 and NIR PI deliver the most valuable data and 40 could be used as a future threshold in surgical decision making. Clinical Trial Register This study is registered at the German Clinical Trials Register (DRKS) under the registration number DRKS00020926.
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Affiliation(s)
- Lukas H Kohler
- Department of Orthopedic, Trauma and Plastic Surgery, Leipzig University Hospital, Liebigstraße 20, 04103, Leipzig, Saxony, Germany.
| | - Hannes Köhler
- Innovation Center Computer Assisted Surgery (ICCAS), University of Leipzig, Leipzig, Saxony, Germany
| | - Simon Kohler
- Department of Orthopedic, Trauma and Plastic Surgery, Leipzig University Hospital, Liebigstraße 20, 04103, Leipzig, Saxony, Germany
| | - Stefan Langer
- Department of Orthopedic, Trauma and Plastic Surgery, Leipzig University Hospital, Liebigstraße 20, 04103, Leipzig, Saxony, Germany
| | - Rima Nuwayhid
- Department of Orthopedic, Trauma and Plastic Surgery, Leipzig University Hospital, Liebigstraße 20, 04103, Leipzig, Saxony, Germany
| | - Ines Gockel
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, Leipzig University Hospital, Leipzig, Saxony, Germany
| | - Nick Spindler
- Department of Orthopedic, Trauma and Plastic Surgery, Leipzig University Hospital, Liebigstraße 20, 04103, Leipzig, Saxony, Germany
| | - Georg Osterhoff
- Department of Orthopedic, Trauma and Plastic Surgery, Leipzig University Hospital, Liebigstraße 20, 04103, Leipzig, Saxony, Germany
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Dietrich M, Brenner T, Nickel F, Studier-Fischer A, Müller-Stich BP, Weigand MA, Schmidt K. [What is new in … Hyperspectral imaging : A future technology for hemodynamic monitoring]. Anaesthesist 2020; 70:144-145. [PMID: 33258002 DOI: 10.1007/s00101-020-00892-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M Dietrich
- Klinik für Anästhesiologie, Universitätsklinikum Heidelberg, Heidelberg, Deutschland
| | - T Brenner
- Klinik für Anästhesiologie und Intensivmedizin, Universitätsklinikum Essen, Universität Duisburg-Essen, Hufelandstraße 55, 45147, Essen, Deutschland
| | - F Nickel
- Klinik für Allgemein‑, Viszeral- und Transplantationschirurgie, Universitätsklinikum Heidelberg, Heidelberg, Deutschland
| | - A Studier-Fischer
- Klinik für Allgemein‑, Viszeral- und Transplantationschirurgie, Universitätsklinikum Heidelberg, Heidelberg, Deutschland
| | - B P Müller-Stich
- Klinik für Allgemein‑, Viszeral- und Transplantationschirurgie, Universitätsklinikum Heidelberg, Heidelberg, Deutschland
| | - M A Weigand
- Klinik für Anästhesiologie, Universitätsklinikum Heidelberg, Heidelberg, Deutschland
| | - K Schmidt
- Klinik für Anästhesiologie und Intensivmedizin, Universitätsklinikum Essen, Universität Duisburg-Essen, Hufelandstraße 55, 45147, Essen, Deutschland.
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Saiko G, Lombardi P, Au Y, Queen D, Armstrong D, Harding K. Hyperspectral imaging in wound care: A systematic review. Int Wound J 2020; 17:1840-1856. [PMID: 32830443 PMCID: PMC7949456 DOI: 10.1111/iwj.13474] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 07/07/2020] [Accepted: 07/15/2020] [Indexed: 01/18/2023] Open
Abstract
Multispectral and hyperspectral imaging (HSI) are emerging imaging techniques with the potential to transform the way patients with wounds are cared for, but it is not clear whether current systems are capable of delivering real-time tissue characterisation and treatment guidance. We conducted a systematic review of HSI systems that have been assessed in patients, published over the past 32 years. We analysed 140 studies, including 10 different HSI systems. Current in vivo HSI systems generate a tissue oxygenation map. Tissue oxygenation measurements may help to predict those patients at risk of wound formation or delayed healing. No safety concerns were reported in any studies. A small number of studies have demonstrated the capabilities of in vivo label-free HSI, but further work is needed to fully integrate it into the current clinical workflow for different wound aetiologies. As an emerging imaging modality for medical applications, HSI offers great potential for non-invasive disease diagnosis and guidance when treating patients with both acute and chronic wounds.
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Affiliation(s)
| | | | | | | | - David Armstrong
- Keck School of MedicineUniversity of Southern California, Los AngelesCaliforniaCaliforniaCanada
| | - Keith Harding
- School of MedicineCardiff UniversityWalesUK
- A*STARSingapore
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Algorithm for Mapping Kidney Tissue Water Content during Normothermic Machine Perfusion Using Hyperspectral Imaging. ALGORITHMS 2020. [DOI: 10.3390/a13110289] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The preservation of kidneys using normothermic machine perfusion (NMP) prior to transplantation has the potential for predictive evaluation of organ quality. Investigations concerning the quantitative assessment of physiological tissue parameters and their dependence on organ function lack in this context. In this study, hyperspectral imaging (HSI) in the wavelength range of 500–995 nm was conducted for the determination of tissue water content (TWC) in kidneys. The quantitative relationship between spectral data and the reference TWC values was established by partial least squares regression (PLSR). Different preprocessing methods were applied to investigate their influence on predicting the TWC of kidneys. In the full wavelength range, the best models for absorbance and reflectance spectra provided Rp2 values of 0.968 and 0.963, as well as root-mean-square error of prediction (RMSEP) values of 2.016 and 2.155, respectively. Considering an optimal wavelength range (800–980 nm), the best model based on reflectance spectra (Rp2 value of 0.941, RMSEP value of 3.202). Finally, the visualization of TWC distribution in all pixels of kidneys’ HSI image was implemented. The results show the feasibility of HSI for a non-invasively and accurate TWC prediction in kidneys, which could be used in the future to assess the quality of kidneys during the preservation period.
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Bjorgan A, Pukstad BS, Randeberg LL. Hyperspectral characterization of re-epithelialization in an in vitro wound model. JOURNAL OF BIOPHOTONICS 2020; 13:e202000108. [PMID: 32558341 DOI: 10.1002/jbio.202000108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 05/27/2020] [Accepted: 06/11/2020] [Indexed: 06/11/2023]
Abstract
In vitro wound models are useful for research on wound re-epithelialization. Hyperspectral imaging represents a non-destructive alternative to histology analysis for detection of re-epithelialization. This study aims to characterize the main optical behavior of a wound model in order to enable development of detection algorithms. K-Means clustering and agglomerative analysis were used to group spatial regions based on the spectral behavior, and an inverse photon transport model was used to explain differences in optical properties. Six samples of the wound model were prepared from human tissue and followed over 22 days. Re-epithelialization occurred at a mean rate of 0.24 mm2 /day after day 8 to 10. Suppression of wound spectral features was the main feature characterizing re-epithelialized and intact tissue. Modeling the photon transport through a diffuse layer placed on top of wound tissue properties reproduced the spectral behavior. The missing top layer represented by wounds is thus optically detectable using hyperspectral imaging.
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Affiliation(s)
- Asgeir Bjorgan
- Department of Electronic Systems, NTNU Norwegian University of Science and Technology, Trondheim, Norway
| | - Brita S Pukstad
- Department of Clinical and Molecular Medicine, NTNU Norwegian University of Science and Technology, Trondheim, Norway
- Department of Dermatology, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Lise L Randeberg
- Department of Electronic Systems, NTNU Norwegian University of Science and Technology, Trondheim, Norway
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Mehdorn M, Köhler H, Rabe SM, Niebisch S, Lyros O, Chalopin C, Gockel I, Jansen-Winkeln B. Hyperspectral Imaging (HSI) in Acute Mesenteric Ischemia to Detect Intestinal Perfusion Deficits. J Surg Res 2020; 254:7-15. [DOI: 10.1016/j.jss.2020.04.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 03/19/2020] [Accepted: 04/07/2020] [Indexed: 02/07/2023]
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Dietrich M, Marx S, Bruckner T, Nickel F, Müller-Stich BP, Hackert T, Weigand MA, Uhle F, Brenner T, Schmidt K. Bedside hyperspectral imaging for the evaluation of microcirculatory alterations in perioperative intensive care medicine: a study protocol for an observational clinical pilot study (HySpI-ICU). BMJ Open 2020; 10:e035742. [PMID: 32948546 PMCID: PMC7500303 DOI: 10.1136/bmjopen-2019-035742] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
INTRODUCTION Normalisation of macrocirculatory parameters during resuscitation therapy does not guarantee the restoration of microcirculatory perfusion in critical illness due to haemodynamic incoherence. Persistent microcirculatory abnormalities are associated with severity of organ dysfunction and mandate the development of bedside microcirculatory monitoring. A novel hyperspectral imaging (HSI) system can visualise changes in skin perfusion, oxygenation and water content at the bedside. We aim to evaluate the effectiveness of HSI for bedside monitoring of skin microcirculation and the association of HSI parameters with organ dysfunction in patients with sepsis and major abdominal surgery. METHODS AND ANALYSIS Three independent groups will be assessed and separately analysed within a clinical prospective observational study: (1) 25 patients with sepsis or septic shock (according to sepsis-3 criteria), (2) 25 patients undergoing pancreatic surgery and (3) 25 healthy controls. Patients with sepsis and patients undergoing pancreatic surgery will receive standard therapy according to local protocols derived from international guidelines. In addition, cardiac output of perioperative patients and patients with sepsis will be measured. Healthy controls undergo one standardised evaluation. The TIVITA Tissue System is a novel HSI system that uses the visible and near-infrared spectral light region to determine tissue microcirculatory parameters. HSI analysis (hand/knee) will be done in parallel to haemodynamic monitoring within defined intervals during a 72-hour observation period. HSI data will be correlated with the Sequential Organ Failure Assessment score, global haemodynamics, inflammation and glycocalyx markers, surgical complications and 30-day outcome. ETHICS AND DISSEMINATION The protocol has been approved by the local ethics committee of the University of Heidelberg (S-148/2019). Study results will be submitted to peer-reviewed journals and medical conferences. TRIAL REGISTRATION NUMBER DRKS00017313; Pre-results.
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Affiliation(s)
- Maximilian Dietrich
- Department of Anaesthesiology, University Hospital Heidelberg, Heidelberg, Germany
| | - Sebastian Marx
- Department of Anaesthesiology, University Hospital Heidelberg, Heidelberg, Germany
| | - Thomas Bruckner
- Institute of Medical Biometry and Informatics, University of Heidelberg, Heidelberg, Germany
| | - Felix Nickel
- Department of General, Visceral and Transplantation Surgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Beat Peter Müller-Stich
- Department of General, Visceral and Transplantation Surgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Thilo Hackert
- Department of General, Visceral and Transplantation Surgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Markus A Weigand
- Department of Anaesthesiology, University Hospital Heidelberg, Heidelberg, Germany
| | - Florian Uhle
- Department of Anaesthesiology, University Hospital Heidelberg, Heidelberg, Germany
| | - Thorsten Brenner
- Department of Anaesthesiology, University Hospital Heidelberg, Heidelberg, Germany
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Essen, University Duisburg-Essen, Essen, North Rhine-Westphalia, Germany
| | - Karsten Schmidt
- Department of Anaesthesiology, University Hospital Heidelberg, Heidelberg, Germany
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Essen, University Duisburg-Essen, Essen, North Rhine-Westphalia, Germany
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Bjorgan A, Randeberg LL. Exploiting scale-invariance: a top layer targeted inverse model for hyperspectral images of wounds. BIOMEDICAL OPTICS EXPRESS 2020; 11:5070-5091. [PMID: 33014601 PMCID: PMC7510863 DOI: 10.1364/boe.399636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 07/15/2020] [Accepted: 07/28/2020] [Indexed: 05/10/2023]
Abstract
Detection of re-epithelialization in wound healing is important, but challenging. Hyperspectral imaging can be used for non-destructive characterization, but efficient techniques are needed to extract and interpret the information. An inverse photon transport model suitable for characterization of re-epithelialization is validated and explored in this study. It exploits scale-invariance to enable fitting of the epidermal skin layer only. Monte Carlo simulations indicate that the fitted layer transmittance and reflectance spectra are unique, and that there exists an infinite number of coupled parameter solutions. The method is used to explain the optical behavior of and detect re-epithelialization in an in vitro wound model.
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Saiko G, Lombardi P, Au Y, Queen D, Armstrong D, Harding K. Hyperspectral imaging in wound care: A systematic review. Int Wound J 2020. [PMID: 32830443 DOI: 10.1111/iwj.13474.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Multispectral and hyperspectral imaging (HSI) are emerging imaging techniques with the potential to transform the way patients with wounds are cared for, but it is not clear whether current systems are capable of delivering real-time tissue characterisation and treatment guidance. We conducted a systematic review of HSI systems that have been assessed in patients, published over the past 32 years. We analysed 140 studies, including 10 different HSI systems. Current in vivo HSI systems generate a tissue oxygenation map. Tissue oxygenation measurements may help to predict those patients at risk of wound formation or delayed healing. No safety concerns were reported in any studies. A small number of studies have demonstrated the capabilities of in vivo label-free HSI, but further work is needed to fully integrate it into the current clinical workflow for different wound aetiologies. As an emerging imaging modality for medical applications, HSI offers great potential for non-invasive disease diagnosis and guidance when treating patients with both acute and chronic wounds.
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Affiliation(s)
| | | | | | | | - David Armstrong
- Keck School of Medicine, University of Southern California, Los Angeles, California, California, Canada
| | - Keith Harding
- School of Medicine, Cardiff University, Wales, UK.,A*STAR, Singapore
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Schwandner F, Hinz S, Witte M, Philipp M, Schafmayer C, Grambow E. Intraoperative Assessment of Gastric Sleeve Oxygenation Using Hyperspectral Imaging in Esophageal Resection: A Feasibility Study. Visc Med 2020; 37:165-170. [PMID: 34239918 DOI: 10.1159/000509304] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 06/08/2020] [Indexed: 12/14/2022] Open
Abstract
Introduction Sufficient tissue oxygenation is essential for anastomotic healing in visceral surgery. Hyperspectral imaging (HSI) is a noncontact, noninvasive technique for clinical assessment of tissue oxygenation in real time. Methods In this case series, HSI was used in 4 patients who were admitted for either esophageal cancer or cardiac carcinoma (AEG type I or II). Thoraco-abdominal surgical esophageal resection was performed after staging and neoadjuvant therapy. Intraoperative oxygenation of superficial (StO2) and underlying tissue (NIR perfusion index) of the gastric sleeve were studied intrathoracic by means of the TIVITA® Tissue HSI camera. This was performed prior to esophagogastric anastomosis. The postoperative course, especially in view of surgical complications, was recorded. Results Assessment of StO2 and NIR perfusion index was performed in 4 regions of interest per gastric sleeve, aboral and oral of the clinically determined resection line. It allowed the fast quantification of gastric oxygenation prior gastroesophageal anastomosis. Median StO2 aboral of the determined resection line was 69%, while median StO2 in the oral part of the gastric sleeve was found at 53%. In contrast, the median NIR perfusion index was similar aboral (80) and oral (82) of the resection line. In none of the 4 studied patients, an anastomotic failure appeared. Discussion/Conclusion This report suggests that HSI is a feasible technique for intraoperative assessment of tissue oxygenation before gastroesophageal anastomosis and might reduce the incidence of anastomotic failure in the gastrointestinal tract.
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Affiliation(s)
- Frank Schwandner
- Department of General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
| | - Sebastian Hinz
- Department of General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
| | - Maria Witte
- Department of General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
| | - Mark Philipp
- Department of General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
| | - Clemens Schafmayer
- Department of General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
| | - Eberhard Grambow
- Department of General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
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Dietrich M, Marx S, Weigand MA, Brenner T, Schmidt K. Hyperspectral imaging for bedside microcirculatory monitoring of critical care and perioperative patients: A new approach for tissue perfusion-based haemodynamic management? Anaesth Crit Care Pain Med 2020; 39:631-633. [PMID: 32289530 DOI: 10.1016/j.accpm.2019.11.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 11/01/2019] [Accepted: 11/01/2019] [Indexed: 10/24/2022]
Affiliation(s)
- M Dietrich
- Department of Anaesthesiology, Heidelberg University Hospital, 110, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany
| | - S Marx
- Department of Anaesthesiology, Heidelberg University Hospital, 110, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany
| | - M A Weigand
- Department of Anaesthesiology, Heidelberg University Hospital, 110, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany
| | - T Brenner
- Department of Anaesthesiology, Heidelberg University Hospital, 110, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany
| | - K Schmidt
- Department of Anaesthesiology, Heidelberg University Hospital, 110, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany.
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Marotz J, Kulcke A, Siemers F, Cruz D, Aljowder A, Promny D, Daeschlein G, Wild T. Extended Perfusion Parameter Estimation from Hyperspectral Imaging Data for Bedside Diagnostic in Medicine. Molecules 2019; 24:molecules24224164. [PMID: 31744187 PMCID: PMC6891704 DOI: 10.3390/molecules24224164] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 10/30/2019] [Accepted: 11/14/2019] [Indexed: 11/16/2022] Open
Abstract
Background: Hyperspectral Imaging (HSI) has a strong potential to be established as a new contact-free measuring method in medicine. Hyperspectral cameras and data processing have to fulfill requirements concerning practicability and validity to be integrated in clinical routine processes. Methods: Calculating physiological parameters which are of significant clinical value from recorded remission spectra is a complex challenge. We present a data processing method for HSI remission spectra based on a five-layer model of perfused tissue that generates perfusion parameters for every layer and presents them as depth profiles. The modeling of the radiation transport and the solution of the inverse problem are based on familiar approximations, but use partially heuristic methods for efficiency and to fulfill practical clinical requirements. Results: The parameter determination process is consistent, as the measured spectrum is practically completely reproducible by the modeling sequence; in other words, the whole spectral information is transformed into model parameters which are easily accessible for physiological interpretation. The method is flexible enough to be applicable on a wide spectrum of skin and wounds. Examples of advanced procedures utilizing extended perfusion representation in clinical application areas (flap control, burn diagnosis) are presented.
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Affiliation(s)
- Jörg Marotz
- Klinik für Plastische und Handchirurgie und Brandverletztenzentrum, BG-Klinikum Bergmannstrost, D-06002 Halle (Saale), Germany;
- Institute of Applied Bioscience and Process Management, University of Applied Science Anhalt, D-06366 Köthen (Anhalt), Germany;
- Correspondence: ; Tel.: +49-17696526456
| | - Axel Kulcke
- Diaspective Vision GmbH, D-18233 Am Salzhaff, Germany;
| | - Frank Siemers
- Klinik für Plastische und Handchirurgie und Brandverletztenzentrum, BG-Klinikum Bergmannstrost, D-06002 Halle (Saale), Germany;
| | - Diogo Cruz
- Clinic of Plastic, Hand and Aesthetic Surgery, Medical Center Dessau, University of Applied Science Anhalt, D-06847 Dessau, Germany;
| | - Ahmed Aljowder
- Clinic of Dermatology, Immunology and Allergology, Medical Center Dessau, Medical University Brandenburg “Theodor Fontane“ Medical Center Dessau, D-06847 Dessau, Germany;
| | - Dominik Promny
- Klinik für Plastische, Wiederherstellende und Handchirurgie, Zentrum für Schwerbrandverletzte, Klinikum Nürnberg, D-90471 Nürnberg, Germany;
| | - Georg Daeschlein
- Klinik und Poliklinik für Hautkrankheiten, Universitätsmedizin Greifswald, D-17475 Greifswald, Germany;
| | - Thomas Wild
- Institute of Applied Bioscience and Process Management, University of Applied Science Anhalt, D-06366 Köthen (Anhalt), Germany;
- Clinic of Plastic, Hand and Aesthetic Surgery, Medical Center Dessau, University of Applied Science Anhalt, D-06847 Dessau, Germany;
- Clinic of Dermatology, Immunology and Allergology, Medical Center Dessau, Medical University Brandenburg “Theodor Fontane“ Medical Center Dessau, D-06847 Dessau, Germany;
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Grambow E, Dau M, Sandkühler NA, Leuchter M, Holmer A, Klar E, Weinrich M. Evaluation of peripheral artery disease with the TIVITA® Tissue hyperspectral imaging camera system. Clin Hemorheol Microcirc 2019; 73:3-17. [DOI: 10.3233/ch-199215] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Eberhard Grambow
- Department for General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
| | - Michael Dau
- Department of Oral, Maxillofacial and Plastic Surgery, University Medical Center Rostock, Rostock, Germany
| | - Niels Arne Sandkühler
- Department for General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
| | - Matthias Leuchter
- Department for General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
| | | | - Ernst Klar
- Department for General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
| | - Malte Weinrich
- Department for General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
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Abstract
INTRODUCTION Anastomotic insufficiency (AI) remains the most feared surgical complication in gastrointestinal surgery, which is closely associated with a prolonged inpatient hospital stay and significant postoperative mortality. Hyperspectral imaging (HSI) is a relatively new medical imaging procedure which has proven to be promising in tissue identification as well as in the analysis of tissue oxygenation and water content. Until now, no data exist on the in vivo HSI analysis of gastrointestinal anastomoses. METHODS Intraoperative images were obtained using the TIVITA™ tissue system HSI camera from Diaspective Vision GmbH (Pepelow, Germany). In 47 patients who underwent gastrointestinal surgery with esophageal, gastric, pancreatic, small bowel or colorectal anastomoses, 97 assessable recordings were generated. Parameters obtained at the sites of the anastomoses included tissue oxygenation (StO2), the tissue hemoglobin index (THI), near-infrared (NIR) perfusion index, and tissue water index (TWI). RESULTS Obtaining and analyzing the intraoperative images with this non-invasive imaging system proved practicable and delivered good results on a consistent basis. A NIR gradient along and across the anastomosis was observed and, furthermore, analysis of the tissue water and oxygenation content showed specific changes at the site of anastomosis. CONCLUSION The HSI method provides a non-contact, non-invasive, intraoperative imaging procedure without the use of a contrast medium, which enables a real-time analysis of physiological anastomotic parameters, which may contribute to determine the "ideal" anastomotic region. In light of this, the establishment of this methodology in the field of visceral surgery, enabling the generation of normal or cut off values for different gastrointestinal anastomotic types, is an obvious necessity.
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Köhler H, Jansen-Winkeln B, Maktabi M, Barberio M, Takoh J, Holfert N, Moulla Y, Niebisch S, Diana M, Neumuth T, Rabe SM, Chalopin C, Melzer A, Gockel I. Evaluation of hyperspectral imaging (HSI) for the measurement of ischemic conditioning effects of the gastric conduit during esophagectomy. Surg Endosc 2019; 33:3775-3782. [DOI: 10.1007/s00464-019-06675-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 01/17/2019] [Indexed: 12/18/2022]
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Duan F, Yuan J, Liu X, Cui L, Bai YH, Li XH, Xu HR, Liu CY, Yu WX. Feasibility of hyperspectral analysis for discrimination of rabbit liver VX2 tumor. World J Gastrointest Oncol 2019; 11:1-8. [PMID: 30984345 PMCID: PMC6451930 DOI: 10.4251/wjgo.v11.i1.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Revised: 12/08/2018] [Accepted: 12/13/2018] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Hepatocellular carcinoma is one of the most common malignant tumors worldwide. Currently, the most accurate diagnosis imaging modality for hepatocellular carcinoma is enhanced magnetic resonance imaging. However, it is still difficult to distinguish cirrhosis lesions, and novel diagnosis modalities are still needed.
AIM To investigate the feasibility of hyperspectral analysis for discrimination of rabbit liver VX2 tumor.
METHODS In this study, a rabbit liver VX2 tumor model was established. After laparotomy, under direct view, VX2 tumor tissue and normal liver tissue were subjected to hyperspectral analysis.
RESULTS The spectral signature of the liver tumor was clearly distinguishable from that of the normal tissue, simply from the original spectral curves. Specifically, two absorption peaks at 600-900 nm wavelength in normal tissue disappeared but a new reflection peak appeared in the tumor. The average optical reflection at the whole waveband of 400-1800 nm in liver tumor was higher than that of the normal tissue.
CONCLUSION Hyperspectral analysis can differentiate rabbit VX2 tumors. Further research will continue to perform hyperspectral imaging to obtain more information for differentiation of liver cancer from normal tissue.
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Affiliation(s)
- Feng Duan
- Department of Interventional Radiology, the General Hospital of Chinese People’s Liberation Army, Beijing 100853, China
| | - Jing Yuan
- Department of Pathology, the General Hospital of Chinese People’s Liberation Army, Beijing 100853, China
| | - Xuan Liu
- Department of Interventional Radiology, the General Hospital of Chinese People’s Liberation Army, Beijing 100853, China
| | - Li Cui
- Department of Interventional Radiology, the General Hospital of Chinese People’s Liberation Army, Beijing 100853, China
| | - Yan-Hua Bai
- Department of Interventional Radiology, the General Hospital of Chinese People’s Liberation Army, Beijing 100853, China
| | - Xiao-Hui Li
- Department of Interventional Radiology, the General Hospital of Chinese People’s Liberation Army, Beijing 100853, China
| | - Huang-Rong Xu
- Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, Shaanxi Province, China
| | - Chen-Yang Liu
- Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, Shaanxi Province, China
| | - Wei-Xing Yu
- Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, Shaanxi Province, China
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Holmer A, Marotz J, Wahl P, Dau M, Kämmerer PW. Hyperspectral imaging in perfusion and wound diagnostics – methods and algorithms for the determination of tissue parameters. ACTA ACUST UNITED AC 2018; 63:547-556. [DOI: 10.1515/bmt-2017-0155] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 06/01/2018] [Indexed: 02/05/2023]
Abstract
Abstract
Blood perfusion is the supply of tissue with blood, and oxygen is a key factor in the field of minor and major wound healing. Reduced perfusion of a wound bed or transplant often causes various complications. Reliable methods for an objective evaluation of perfusion status are still lacking, and insufficient perfusion may remain undiscovered, resulting in chronic processes and failing transplants. Hyperspectral imaging (HSI) represents a novel method with increasing importance for clinical practice. Therefore, methods, software and algorithms for a new HSI system are presented which can be used to observe tissue oxygenation and other parameters that are of importance in supervising healing processes. This could offer an improved insight into wound perfusion allowing timely intervention.
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Affiliation(s)
- Amadeus Holmer
- Diaspective Vision GmbH , Strandstraße 15 , D-18233 Am Salzhaff , Germany
| | - Jörg Marotz
- Diaspective Vision GmbH , Strandstraße 15 , D-18233 Am Salzhaff , Germany
| | - Philip Wahl
- Diaspective Vision GmbH , Strandstraße 15 , D-18233 Am Salzhaff , Germany
| | - Michael Dau
- Department of Oral, Maxillofacial Plastic Surgery , University Medical Center Rostock , D-18057 Rostock , Germany
| | - Peer W. Kämmerer
- Department of Oral, Maxillofacial Plastic Surgery , University Medical Center Rostock , D-18057 Rostock , Germany
- Department of Oral, Maxillofacial Plastic Surgery , University Medical Center Mainz , D-55131 Mainz , Germany
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Wild T, Becker M, Winter J, Schuhschenk N, Daeschlein G, Siemers F. Hyperspectral imaging of tissue perfusion and oxygenation in wounds: assessing the impact of a micro capillary dressing. J Wound Care 2018; 27:38-51. [DOI: 10.12968/jowc.2018.27.1.38] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Thomas Wild
- Clinic of Plastic, Aesthetic und Hand Surgery, Universtiy of Applied Science Anhalt, Medical Center Desau; Clinic of Dermatologie, Venerology und Allergology, Immunological Center, Medical School Brandenburg ‘Theodor Fontane’ Medical Center Dessau
| | - Markus Becker
- Clinic of Dermatologie, Venerology und Allergology, Immunological Center, Medical School Brandenburg ‘Theodor Fontane’ Medical Center Dessau
| | - Jochen Winter
- Clinic of Plastic, Aesthetic und Hand Surgery, Universtiy of Applied Science Anhalt, Medical Center Desau
| | - Nicole Schuhschenk
- Clinic of Plastic, Aesthetic und Hand Surgery, Universtiy of Applied Science Anhalt, Medical Center Desau
| | | | - Frank Siemers
- Berufsgenossenschaftliche Kliniken Bergmannstrost, Postfach 200153, D-06002 Halle (Saale)
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