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Miskovic V, Malafronte E, Minetti C, Machrafi H, Varon C, Iorio CS. Thermotropic Liquid Crystals for Temperature Mapping. Front Bioeng Biotechnol 2022; 10:806362. [PMID: 35646874 PMCID: PMC9133408 DOI: 10.3389/fbioe.2022.806362] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Accepted: 03/24/2022] [Indexed: 11/13/2022] Open
Abstract
Wound management in Space is an important factor to be considered in future Human Space Exploration. It demands the development of reliable wound monitoring systems that will facilitate the assessment and proper care of wounds in isolated environments, such as Space. One possible system could be developed using liquid crystal films, which have been a promising solution for real-time in-situ temperature monitoring in healthcare, but they are not yet implemented in clinical practice. To progress in the latter, the goal of this study is twofold. First, it provides a full characterization of a sensing element composed of thermotropic liquid crystals arrays embedded between two elastomer layers, and second, it discusses how such a system compares against non-local infrared measurements. The sensing element evaluated here has an operating temperature range of 34–38°C, and a quick response time of approximately 0.25 s. The temperature distribution of surfaces obtained using this system was compared to the one obtained using the infrared thermography, a technique commonly used to measure temperature distributions at the wound site. This comparison was done on a mimicked wound, and results indicate that the proposed sensing element can reproduce the temperature distributions, similar to the ones obtained using infrared imaging. Although there is a long way to go before implementing the liquid crystal sensing element into clinical practice, the results of this work demonstrate that such sensors can be suitable for future wound monitoring systems.
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Affiliation(s)
- Vanja Miskovic
- Service Chimie-Physique, Université Libre de Bruxelles, Brussels, Belgium
- *Correspondence: Vanja Miskovic,
| | - Elena Malafronte
- Service Chimie-Physique, Université Libre de Bruxelles, Brussels, Belgium
| | - Christophe Minetti
- Service Chimie-Physique, Université Libre de Bruxelles, Brussels, Belgium
| | - Hatim Machrafi
- Service Chimie-Physique, Université Libre de Bruxelles, Brussels, Belgium
- GIGA-In Silico Medicine, Université de Liége, Liège, Belgium
| | - Carolina Varon
- Service Chimie-Physique, Université Libre de Bruxelles, Brussels, Belgium
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Infrared Thermography as a Non-Invasive Tool in Musculoskeletal Disease Rehabilitation—The Control Variables in Applicability—A Systematic Review. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12094302] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
In recent years, the usefulness of infrared thermography (IRT) as a valuable supplementary imaging method in medical diagnostics, as well as for assessing the effects of the treatment of musculoskeletal injuries, has been increasingly confirmed. At the same time, great importance is attached to the standards of thermographic research, the fulfillment of which determines the correct methodology and interpretation of the results. This article discusses the medical applications of infrared thermography in musculoskeletal system diseases, with particular emphasis on its usefulness in assessing the therapeutic effects of physical treatments used in rehabilitation. The literature from the last decade that is available in the Medline and Web of Science databases has been reviewed. Among the physiotherapeutic methods used, the following were selected that directly affect the musculoskeletal system: cryotherapy, laser therapy, electrotherapy, diathermy, and massage. The article summarizes all the guidelines and recommendations for IR imaging in medicine and rehabilitation.
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Casal D, Mota-Silva E, Iria I, Alves S, Farinho A, Pen C, Lourenço-Silva N, Mascarenhas-Lemos L, Silva-Ferreira J, Ferraz-Oliveira M, Vassilenko V, Videira PA, Goyri-O’Neill J, Pais D. Reconstruction of a 10-mm-long median nerve gap in an ischemic environment using autologous conduits with different patterns of blood supply: A comparative study in the rat. PLoS One 2018; 13:e0195692. [PMID: 29659600 PMCID: PMC5902043 DOI: 10.1371/journal.pone.0195692] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Accepted: 03/27/2018] [Indexed: 12/19/2022] Open
Abstract
The aim of this study was to evaluate in the Wistar rat the efficacy of various autologous nerve conduits with various forms of blood supply in reconstructing a 10-mm-long gap in the median nerve (MN) under conditions of local ischemia. A 10-mm-long median nerve defect was created in the right arm. A loose silicone tube was placed around the nerve gap zone, in order to simulate a local ischemic environment. Rats were divided in the following experimental groups (each with 20 rats): the nerve Graft (NG) group, in which the excised MN segment was reattached; the conventional nerve flap (CNF) and the arterialized neurovenous flap (ANVF) groups in which the gap was bridged with homonymous median nerve flaps; the prefabricated nerve flap (PNF) group in which the gap was reconstructed with a fabricated flap created by leaving an arteriovenous fistula in contact with the sciatic nerve for 5 weeks; and the two control groups, Sham and Excision groups. In the latter group, the proximal stump of the MN nerve was ligated and no repair was performed. The rats were followed for 100 days. During this time, they did physiotherapy. Functional, electroneuromyographic and histological studies were performed. The CNF and ANVF groups presented better results than the NG group in the following assessments: grasping test, nociception, motor stimulation threshold, muscle weight, and histomorphometric evaluation. Radial deviation of the operated forepaw was more common in rats that presented worse results in the other outcome variables. Overall, CNFs and ANVFs produced a faster and more complete recovery than NGs in the reconstruction of a 10-mm-long median nerve gap in an ischemic environment in the Wistar rat. Although, results obtained with CNFs were in most cases were better than ANVFs, these differences were not statistically significant for most of the outcome variables.
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Affiliation(s)
- Diogo Casal
- Anatomy Department, NOVA Medical School, Universidade NOVA de Lisboa, Lisbon, Portugal
- Plastic and Reconstructive Surgery Department and Burn Unit, Centro Hospitalar de Lisboa Central–Hospital de São José, Lisbon, Portugal
- UCIBIO, Life Sciences Department, Faculty of Sciences and Technology, Universidade NOVA de Lisboa, Caparica, Portugal
- CEDOC, NOVA Medical School, Universidade NOVA de Lisboa, Lisbon, Portugal
| | - Eduarda Mota-Silva
- LIBPhys, Physics Department, Faculdade de Ciências e Tecnologias, Universidade NOVA de Lisboa, Lisbon, Portugal
| | - Inês Iria
- CEDOC, NOVA Medical School, Universidade NOVA de Lisboa, Lisbon, Portugal
| | - Sara Alves
- Pathology Department, Centro Hospitalar de Lisboa Central–Hospital de São José, Lisbon, Portugal
| | - Ana Farinho
- CEDOC, NOVA Medical School, Universidade NOVA de Lisboa, Lisbon, Portugal
| | - Cláudia Pen
- Pathology Department, Centro Hospitalar de Lisboa Central–Hospital de São José, Lisbon, Portugal
| | | | - Luís Mascarenhas-Lemos
- Anatomy Department, NOVA Medical School, Universidade NOVA de Lisboa, Lisbon, Portugal
- Pathology Department, Centro Hospitalar de Lisboa Central–Hospital de São José, Lisbon, Portugal
| | - José Silva-Ferreira
- Pathology Department, Centro Hospitalar de Lisboa Central–Hospital de São José, Lisbon, Portugal
| | - Mário Ferraz-Oliveira
- Pathology Department, Centro Hospitalar de Lisboa Central–Hospital de São José, Lisbon, Portugal
| | - Valentina Vassilenko
- LIBPhys, Physics Department, Faculdade de Ciências e Tecnologias, Universidade NOVA de Lisboa, Lisbon, Portugal
| | - Paula Alexandra Videira
- UCIBIO, Life Sciences Department, Faculty of Sciences and Technology, Universidade NOVA de Lisboa, Caparica, Portugal
- CEDOC, NOVA Medical School, Universidade NOVA de Lisboa, Lisbon, Portugal
| | - João Goyri-O’Neill
- Anatomy Department, NOVA Medical School, Universidade NOVA de Lisboa, Lisbon, Portugal
| | - Diogo Pais
- Anatomy Department, NOVA Medical School, Universidade NOVA de Lisboa, Lisbon, Portugal
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