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Soltan N, Siegmund GP, Cripton PA, Jones CF. Geometric and Inertial Properties of the Pig Head and Brain in an Anatomical Coordinate System. Ann Biomed Eng 2023; 51:2544-2553. [PMID: 37358713 PMCID: PMC10598157 DOI: 10.1007/s10439-023-03294-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 06/19/2023] [Indexed: 06/27/2023]
Abstract
Porcine models in injury biomechanics research often involve measuring head or brain kinematics. Translation of data from porcine models to other biomechanical models requires geometric and inertial properties of the pig head and brain, and a translationally relevant anatomical coordinate system (ACS). In this study, the head and brain mass, center of mass (CoM), and mass moments of inertia (MoI) were characterized, and an ACS was proposed for the pre-adolescent domestic pig. Density-calibrated computed tomography scans were obtained for the heads of eleven Large White × Landrace pigs (18-48 kg) and were segmented. An ACS with a porcine-equivalent Frankfort plane was defined using externally palpable landmarks (right/left frontal process of the zygomatic bone and zygomatic process of the frontal bone). The head and brain constituted 7.80 ± 0.79% and 0.33 ± 0.08% of the body mass, respectively. The head and brain CoMs were primarily ventral and caudal to the ACS origin, respectively. The mean head and brain principal MoI (in the ACS with origin at respective CoM) ranged from 61.7 to 109.7 kg cm2, and 0.2 to 0.6 kg cm2, respectively. These data may aid the comparison of head and brain kinematics/kinetics data and the translation between porcine and human injury models.
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Affiliation(s)
- Nikoo Soltan
- Department of Mechanical Engineering, The University of British Columbia, Vancouver, BC Canada
- Orthopaedic and Injury Biomechanics Group, ICORD, Vancouver, BC Canada
| | - Gunter P. Siegmund
- MEA Forensic Engineers & Scientists, Laguna Hills, CA USA
- School of Kinesiology, The University of British Columbia, Vancouver, BC Canada
| | - Peter A. Cripton
- Department of Mechanical Engineering, The University of British Columbia, Vancouver, BC Canada
- Orthopaedic and Injury Biomechanics Group, ICORD, Vancouver, BC Canada
- School of Biomedical Engineering, The University of British Columbia, Vancouver, BC Canada
| | - Claire F. Jones
- School of Electrical and Mechanical Engineering, The University of Adelaide, Adelaide, SA Australia
- Adelaide Spinal Research Group, Centre for Orthopaedic & Trauma Research, The University of Adelaide, Adelaide, SA Australia
- Department of Orthopaedics & Trauma, Royal Adelaide Hospital, Adelaide, SA Australia
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2
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Arias-Buría JL, Borrella-Andrés S, Rodríguez-Sanz J, López-de-Celis C, Malo-Urriés M, Fernández-de-las-Peñas C, Gallego-Sendarrubias GM, González-Rueda V, Pérez-Bellmunt A, Albarova-Corral I. Precision and Safety of Ultrasound-Guided versus Palpation-Guided Needle Placement on the Patellar Tendon: A Cadaveric Study. Life (Basel) 2023; 13:2060. [PMID: 37895441 PMCID: PMC10608026 DOI: 10.3390/life13102060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 10/01/2023] [Accepted: 10/13/2023] [Indexed: 10/29/2023] Open
Abstract
For decades, needling interventions have been performed based on manual palpation and anatomic knowledge. The increasing use of real-time ultrasonography in clinical practice has improved the accuracy and safety of needling techniques. Although currently ultrasound-guided procedures are routinely used for patellar tendon pathology, e.g., during percutaneous electrolysis, the accuracy of these procedures is still unknown. This study used a cadaveric model to compare and evaluate both the accuracy and safety of ultrasound-guided and palpation-guided needling techniques for the patellar tendon. A total of five physical therapists performed a series of 20 needle insertion task each (n = 100), 10 insertions based on manual palpation (n = 50) and 10 insertions guided with ultrasound (n = 50) to place a needle along the interface between the patellar tendon and Hoffa's fat pad. All procedures were performed on cryopreserved knee specimens. Distance to the targeted tissue, time of the procedure, accurate rate of insertions, number of passes, and unintentional punctured structures between both applications (with and without ultrasound guiding) were compared. The results revealed higher accuracy (100% vs. 80%), a lower distance from needle to the targeted tissue (0.25 ± 0.65 vs. 2.5 ± 1.9 mm), longer surface of contact with the needle (15.5 ± 6.65 vs. 4.7 ± 7.5 mm), and a lower frequency of patellar tendon puncture (16% vs. 52%, p < 0.001) with the ultrasound-guided procedure as opposed to palpation-guided one. Nevertheless, the ultrasound-guided procedure took longer (54.8 ± 26.8 vs. 23.75 ± 15.4 s) and required more passes (2.55 ± 1.9 vs. 1.5 ± 0.95) to be conducted than the palpation-guided procedure (all, p < 0.001). According to these findings, the accuracy of invasive procedures applied on the patellar tendon is higher when conducted with ultrasound guidance than when conducted just on manual palpation or anatomical landmark. These results suggest that ultrasound could improve the clinical application of invasive procedures at the fat-patellar tendon interface. Due to the anatomical features of the targeted tissue, some procedures require this precision, so the use of ultrasound is recommended.
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Affiliation(s)
- José L. Arias-Buría
- Department of Physical Therapy, Occupational Therapy, Rehabilitation and Physical Medicine, Universidad Rey Juan Carlos. Av. de Atenas, s/n, Alcorcón, 28922 Madrid, Spain
| | - Sergio Borrella-Andrés
- Health Sciences Faculty, Department of Physiatry and Nursing, University of Zaragoza, C/Domingo Miral S/N, 50009 Zaragoza, Spain
| | - Jacobo Rodríguez-Sanz
- Faculty of Medicine and Health Science, Universitat Internacional de Catalunya C/Josep Trueta S/N, Sant Cugat del Vallés, 08195 Barcelona, Spain
- ACTIUM Functional Anatomy Group, Sant Cugat del Vallés, 08195 Barcelona, Spain
| | - Carlos López-de-Celis
- Faculty of Medicine and Health Science, Universitat Internacional de Catalunya C/Josep Trueta S/N, Sant Cugat del Vallés, 08195 Barcelona, Spain
- ACTIUM Functional Anatomy Group, Sant Cugat del Vallés, 08195 Barcelona, Spain
- Fundació Institut Universitari per a la Recerca a l’Atenció Primària de Salut Jordi Gol i Gurina, 08007 Barcelona, Spain
| | - Miguel Malo-Urriés
- Health Sciences Faculty, Department of Physiatry and Nursing, University of Zaragoza, C/Domingo Miral S/N, 50009 Zaragoza, Spain
| | - César Fernández-de-las-Peñas
- Department of Physical Therapy, Occupational Therapy, Rehabilitation and Physical Medicine, Universidad Rey Juan Carlos. Av. de Atenas, s/n, Alcorcón, 28922 Madrid, Spain
| | - Gracia M. Gallego-Sendarrubias
- Department of Physical Therapy, Camilo José Cela University. C. Castillo de Alarcón, 49, Villafranca del Castillo, 28692 Madrid, Spain
| | - Vanessa González-Rueda
- Faculty of Medicine and Health Science, Universitat Internacional de Catalunya C/Josep Trueta S/N, Sant Cugat del Vallés, 08195 Barcelona, Spain
- ACTIUM Functional Anatomy Group, Sant Cugat del Vallés, 08195 Barcelona, Spain
- Fundació Institut Universitari per a la Recerca a l’Atenció Primària de Salut Jordi Gol i Gurina, 08007 Barcelona, Spain
| | - Albert Pérez-Bellmunt
- Faculty of Medicine and Health Science, Universitat Internacional de Catalunya C/Josep Trueta S/N, Sant Cugat del Vallés, 08195 Barcelona, Spain
- ACTIUM Functional Anatomy Group, Sant Cugat del Vallés, 08195 Barcelona, Spain
| | - Isabel Albarova-Corral
- Health Sciences Faculty, Department of Physiatry and Nursing, University of Zaragoza, C/Domingo Miral S/N, 50009 Zaragoza, Spain
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3
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Pentsou J, Vagias M, Davies T, Hoey S, Huuskonen V. Thoracolumbar Retrolaminar Block: Anatomical and Radiological Study of Injectate Pattern Distribution in Canine Cadavers. Animals (Basel) 2023; 13:3008. [PMID: 37835614 PMCID: PMC10571983 DOI: 10.3390/ani13193008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 09/17/2023] [Accepted: 09/20/2023] [Indexed: 10/15/2023] Open
Abstract
The retrolaminar block is a regional anaesthetic technique, first developed in humans, in which the local anaesthetic is deposited directly onto the dorsal aspect of the thoracic or lumbar vertebral lamina. This study aims to evaluate the distribution of landmark-guided thoracolumbar retrolaminar injections in greyhound cadavers. Thirteen injections of contrast-dye solution were performed in eight cadavers at the level of the twelfth thoracic vertebra (T12), with either 20 mL (n = 8, high volume, HV) or 10 mL (n = 5, low volume, LV) per site. The spread of the injectate was evaluated through computed tomography and transverse anatomical dissection. The groups were compared using the Mann-Whitney U test. The median (range) of the extent of the spread was 4 (2-5) and 3 (2-4) intervertebral foramina in the LV and HV groups, respectively. The median (range) of the spread along the retrolaminar space was 3 (2-3) retrolaminar segments in the LV and 3 (2-4) in the HV group. Epidural and retroperitoneal spread was identified in seven cadavers. Following landmark-guided retrolaminar injections, the injectate spread both in the retrolaminar and paravertebral spaces, without any obvious association between the volume of injectate and the extent of the spread. Further studies are warranted to determine the clinical efficacy of the technique.
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Affiliation(s)
- Julia Pentsou
- Department of Veterinary Anaesthesia and Analgesia, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh EH25 9RG, UK
| | - Michail Vagias
- Department of Small Animal Surgery, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh EH25 9RG, UK;
| | - Thomas Davies
- Bristol Vet Specialists, Unit 10, More Plus Central Park, Madison Way, Severn Beach, Bristol BS35 4ER, UK;
| | - Séamus Hoey
- Equine Clinical Studies, Diagnostic Imaging and Anaesthesia, UCD School of Veterinary Medicine, University College Dublin, D04 W6F6 Dublin, Ireland; (S.H.); (V.H.)
| | - Vilhelmiina Huuskonen
- Equine Clinical Studies, Diagnostic Imaging and Anaesthesia, UCD School of Veterinary Medicine, University College Dublin, D04 W6F6 Dublin, Ireland; (S.H.); (V.H.)
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Axford DT, Potra R, Appleyard R, Tomka J, Arenas-Miquelez A, Bokor D, Ferreira L, Raniga S. Development of a Cadaveric Shoulder Motion Simulator with Open-Loop Iterative Learning for Dynamic, Multiplanar Motion: A Preliminary Study. J Clin Med 2023; 12:4596. [PMID: 37510711 PMCID: PMC10380955 DOI: 10.3390/jcm12144596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 06/26/2023] [Accepted: 07/07/2023] [Indexed: 07/30/2023] Open
Abstract
Ex vivo shoulder motion simulators are commonly used to study shoulder biomechanics but are often limited to performing simple planar motions at quasi-static speeds using control architectures that do not allow muscles to be deactivated. The purpose of this study was to develop an open-loop tendon excursion controller with iterative learning and independent muscle control to simulate complex multiplanar motion at functional speeds and allow for muscle deactivation. The simulator performed abduction/adduction, faceted circumduction, and abduction/adduction (subscapularis deactivation) using a cadaveric shoulder with an implanted reverse total shoulder prosthesis. Kinematic tracking accuracy and repeatability were assessed using maximum absolute error (MAE), root mean square error (RMSE), and average standard deviation (ASD). During abduction/adduction and faceted circumduction, the RMSE did not exceed 0.3, 0.7, and 0.8 degrees for elevation, plane of elevation, and axial rotation, respectively. During abduction/adduction, the ASD did not exceed 0.2 degrees. Abduction/adduction (subscapularis deactivation) resulted in a loss of internal rotation, which could not be restored at low elevation angles. This study presents a novel control architecture, which can accurately simulate complex glenohumeral motion. This simulator will be used as a testing platform to examine the effect of shoulder pathology, treatment, and rehabilitation on joint biomechanics during functional shoulder movements.
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Affiliation(s)
- David Timothy Axford
- Department of Mechanical and Materials Engineering, Western University, London, ON N6A 3K7, Canada
- Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, NSW 2109, Australia
| | - Robert Potra
- Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, NSW 2109, Australia
- Department of Electrical and Computer Engineering, Western University, London, ON N6A 3K7, Canada
| | - Richard Appleyard
- Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, NSW 2109, Australia
| | - Janos Tomka
- Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, NSW 2109, Australia
| | - Antonio Arenas-Miquelez
- Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, NSW 2109, Australia
| | - Desmond Bokor
- Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, NSW 2109, Australia
| | - Louis Ferreira
- Department of Mechanical and Materials Engineering, Western University, London, ON N6A 3K7, Canada
| | - Sumit Raniga
- Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, NSW 2109, Australia
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5
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Ong HN, Chen IH, Hsieh YH, Hsu CH, Weng TI, Chang CC. Comparison of fatal traumatic medico-legal cases with postmortem computed tomography and autopsy: A pilot study in Taiwan. J Formos Med Assoc 2023; 122:351-354. [PMID: 36253239 DOI: 10.1016/j.jfma.2022.09.015] [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: 06/30/2022] [Revised: 09/27/2022] [Accepted: 09/28/2022] [Indexed: 11/07/2022] Open
Abstract
In order to determine the performance of postmortem computed tomography (PMCT) in identifying traumatic-relevant macroscopic findings in medico-legal cases, this retrospective observational pilot study involving nine trauma casualties who had received PMCT prior to autopsy. The comparison of these findings in six anatomical regions as dictated in Injury Severity Score (ISS) were performed. 104 traumatic-relevant findings were identified with achievement of 51% congruent findings. PMCT and autopsy had additionally found 22 and 29 findings respectively. PMCT had highest sensitivity for extremity injury (81.82%), followed by chest (73.91%), head, neck and face (71.43%), and abdomino-pelvic area (50%). It had excellent detection rate in abnormal air collection, fracture, foreign body localization, internal ballistic and intracranial pathology. However, the solid organ and vascular injuries as well as integumentary lesions were the major drawback. In conclusion, incorporation of PMCT to autopsy in medico-legal investigation helps to preserve the most abundant traumatic-relevant injuries compared to either modality.
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Affiliation(s)
- Hooi-Nee Ong
- Department of Emergency Medicine, National Taiwan University Hospital and National Taiwan, University College of Medicine, Taipei, Taiwan; Department and Graduate Institute of Forensic Medicine, National Taiwan University College of Medicine, Taipei, Taiwan
| | - I-Hung Chen
- Department of Forensic Pathology, Institute of Forensic Medicine, Ministry of Justice, New Taipei City, Taiwan
| | - Yu-Hsuan Hsieh
- Department and Graduate Institute of Forensic Medicine, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Cho-Hsien Hsu
- Department of Forensic Pathology, Institute of Forensic Medicine, Ministry of Justice, New Taipei City, Taiwan
| | - Te-I Weng
- Department of Emergency Medicine, National Taiwan University Hospital and National Taiwan, University College of Medicine, Taipei, Taiwan; Department and Graduate Institute of Forensic Medicine, National Taiwan University College of Medicine, Taipei, Taiwan.
| | - Chin-Chen Chang
- Department and Graduate Institute of Forensic Medicine, National Taiwan University College of Medicine, Taipei, Taiwan; Department of Medical Imaging, National Taiwan University Hospital and National Taiwan, University College of Medicine, Taipei, Taiwan.
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6
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Maes A, Pestiaux C, Marino A, Balcaen T, Leyssens L, Vangrunderbeeck S, Pyka G, De Borggraeve WM, Bertrand L, Beauloye C, Horman S, Wevers M, Kerckhofs G. Cryogenic contrast-enhanced microCT enables nondestructive 3D quantitative histopathology of soft biological tissues. Nat Commun 2022; 13:6207. [PMID: 36266273 PMCID: PMC9584947 DOI: 10.1038/s41467-022-34048-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 10/12/2022] [Indexed: 12/24/2022] Open
Abstract
Biological tissues comprise a spatially complex structure, composition and organization at the microscale, named the microstructure. Given the close structure-function relationships in tissues, structural characterization is essential to fully understand the functioning of healthy and pathological tissues, as well as the impact of possible treatments. Here, we present a nondestructive imaging approach to perform quantitative 3D histo(patho)logy of biological tissues, termed Cryogenic Contrast-Enhanced MicroCT (cryo-CECT). By combining sample staining, using an X-ray contrast-enhancing staining agent, with freezing the sample at the optimal freezing rate, cryo-CECT enables 3D visualization and structural analysis of individual tissue constituents, such as muscle and collagen fibers. We applied cryo-CECT on murine hearts subjected to pressure overload following transverse aortic constriction surgery. Cryo-CECT allowed to analyze, in an unprecedented manner, the orientation and diameter of the individual muscle fibers in the entire heart, as well as the 3D localization of fibrotic regions within the myocardial layers. We foresee further applications of cryo-CECT in the optimization of tissue/food preservation and donor banking, showing that cryo-CECT also has clinical and industrial potential.
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Affiliation(s)
- Arne Maes
- Department of Materials Engineering, KU Leuven, Heverlee, Belgium
- Biomechanics lab, Institute of Mechanics, Materials and Civil Engineering, UCLouvain, Louvain-la-Neuve, Belgium
- Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
| | - Camille Pestiaux
- Biomechanics lab, Institute of Mechanics, Materials and Civil Engineering, UCLouvain, Louvain-la-Neuve, Belgium
- Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
| | - Alice Marino
- Pole of Cardiovascular Research, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
| | - Tim Balcaen
- Biomechanics lab, Institute of Mechanics, Materials and Civil Engineering, UCLouvain, Louvain-la-Neuve, Belgium
- Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Leuven, Belgium
| | - Lisa Leyssens
- Biomechanics lab, Institute of Mechanics, Materials and Civil Engineering, UCLouvain, Louvain-la-Neuve, Belgium
- Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
| | - Sarah Vangrunderbeeck
- Biomechanics lab, Institute of Mechanics, Materials and Civil Engineering, UCLouvain, Louvain-la-Neuve, Belgium
- Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Leuven, Belgium
| | - Grzegorz Pyka
- Biomechanics lab, Institute of Mechanics, Materials and Civil Engineering, UCLouvain, Louvain-la-Neuve, Belgium
- Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
| | - Wim M De Borggraeve
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Leuven, Belgium
| | - Luc Bertrand
- Pole of Cardiovascular Research, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
| | | | - Sandrine Horman
- Pole of Cardiovascular Research, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium
| | - Martine Wevers
- Department of Materials Engineering, KU Leuven, Heverlee, Belgium
| | - Greet Kerckhofs
- Department of Materials Engineering, KU Leuven, Heverlee, Belgium.
- Biomechanics lab, Institute of Mechanics, Materials and Civil Engineering, UCLouvain, Louvain-la-Neuve, Belgium.
- Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, Brussels, Belgium.
- Prometheus, Division for Skeletal Tissue Engineering, KU Leuven, Leuven, Belgium.
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Pedrotti E, Bonacci E, Fasolo A, De Rossi A, Camposampiero D, Jones GLA, Bernardi P, Merigo F, Ponzin D, Marchini G, Sbarbati A. Ultrastructural Analysis of Rehydrated Human Donor Corneas After Air-Drying and Dissection by Femtosecond Laser. Front Med (Lausanne) 2022; 8:787937. [PMID: 34993214 PMCID: PMC8724048 DOI: 10.3389/fmed.2021.787937] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 11/24/2021] [Indexed: 11/24/2022] Open
Abstract
Purpose: To evaluate the efficiency of femtosecond laser (FSL) incision of rehydrated human donor corneas after air-drying and its effects on corneal structure. Methods: We compared the rehydrated and fresh-preserved corneas by microscopy following Victus-Tecnolas FSL treatment for straight-edge anterior lamellar keratoplasty (ALK). The corneas were dehydrated at room temperature under a laminar-flow hood. Results: To obtain the horizontal cut in rehydrated corneas, we increased the FSL pulse energy to 1.2 μJ from 0.80 μJ applied for the fresh corneas and obtained a clear-cut separation of the lamellar lenticule cap from the corneal bed. Light microscopy showed regular arrangement of stromal collagen lamellae, with spaces in between the fibers in the corneal stroma in the fresh and the rehydrated corneas, but the uppermost epithelial layers in the rehydrated corneas were lost. Transmission electron microscopy (TEM) revealed no signs of thermal or mechanical damage to the corneal structure. The epithelial basal membrane and Bowman's layer maintained their integrity. The epithelial basal layer and cells were separated by large spaces due to junction alteration in the rehydrated corneas. There were gaps between the lamellar layers in the stroma, especially in the rehydrated corneas. Keratocytes displayed normal structure in the fresh corneas but were devoid of microorganules in the rehydrated corneas. Minor irregularities were observed in the vertical incision and the horizontal stroma appeared smooth on scanning electron microscopy. Conclusion: The corneal stroma of rehydrated corneas maintained morphology and integrity, while corneal cellular components were generally altered. When corneas are intended for FSL-assisted ALK, effective stromal bed incision is best achieved at a laser power higher than that currently adopted for fresh corneas.
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Affiliation(s)
- Emilio Pedrotti
- Ophthalmology Unit, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Erika Bonacci
- Ophthalmology Unit, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Adriano Fasolo
- Ophthalmology Unit, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy.,Research Unit, The Veneto Eye Bank Foundation, Venice, Italy
| | - Arianna De Rossi
- Ophthalmology Unit, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | | | - Gary L A Jones
- Research Unit, The Veneto Eye Bank Foundation, Venice, Italy
| | - Paolo Bernardi
- Anatomy and Histology Section, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Flavia Merigo
- Anatomy and Histology Section, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Diego Ponzin
- Research Unit, The Veneto Eye Bank Foundation, Venice, Italy
| | - Giorgio Marchini
- Ophthalmology Unit, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Andrea Sbarbati
- Anatomy and Histology Section, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
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8
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González-Arnay E, Galluccio F, Pérez-Santos I, Merlano-Castellanos S, Bañón-Boulet E, Jiménez-Sánchez L, Rivier-Julien C, Barrueco-Fernández M, Olea MS, Yamak-Altinpulluk E, Teles AS, Fajardo-Pérez M. Permeable spaces between glenohumeral ligaments as potential gateways for rapid regional anesthesia of the shoulder. Ann Anat 2021; 239:151814. [PMID: 34536540 DOI: 10.1016/j.aanat.2021.151814] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 07/27/2021] [Accepted: 07/28/2021] [Indexed: 11/29/2022]
Abstract
Shoulder pain is a highly prevalent condition, often resulting in major life limitations, and requiring effective treatments. In this work, we explore the anatomical basis of a proposed approach to the regional anesthesia of the shoulder through a single injection under the subscapularis muscle. Bilateral experimental injections in shoulders from body donors (Radiolar ® and Methylene-Blue) under the subscapular muscle (n = 11) and cadaveric systematic dissections of other 35 shoulders from body donors were performed. Injectate spread was then qualitatively assessed. Long axis of permeable foramina in the anterior aspect of the shoulder joint capsule was measured in centimeters using a digital caliper. More than 40% of specimens had at least one permeable space (Weitbrech and/or Rouvière foramina) communicating the subscapular bursa and the articular space. We further demonstrate that an ultrasonography-guided injection under the subscapularis muscle allows the spread of the injectate through the anterior, inferior and posterodorsal walls of the articular capsule, the subacromial bursa, and the bicipital groove, as well as into the articular space for some injections. The odds of accidental intraarticular injection decrease when injecting with low volumes. This anatomical study provides a detailed description of foramina between glenohumeral ligaments. Furthermore, the data shown in this work supports, as a proof of concept, a safe alternative for rapid and specific blockade of terminal sensory branches innervating the shoulder joint capsule.
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Affiliation(s)
- Emilio González-Arnay
- Departamento de Anatomía, Histología y Neurociencia, Universidad Autónoma de Madrid, Calle Arzobispo Morcillo, 4, 28029 Madrid, Spain; Division of Pathology, General Hospital of La Palma (HGLP) Buenavista de Arriba s/n PC48713 La Palma, Canary Islands, Spain.; MoMaRC Morphological Madrid Research Center, Calle Arzobispo Morcillo, 4, 28029 Madrid, Spain.
| | - Felice Galluccio
- MoMaRC Morphological Madrid Research Center, Calle Arzobispo Morcillo, 4, 28029 Madrid, Spain; Division of Rheumatology, Medical-geriatric Department, University Hospital AOU Careggi, Largo Piero Palagi, 1, 50139 Florence, Italy.
| | - Isabel Pérez-Santos
- Departamento de Anatomía, Histología y Neurociencia, Universidad Autónoma de Madrid, Calle Arzobispo Morcillo, 4, 28029 Madrid, Spain.
| | - Sebastián Merlano-Castellanos
- Departamento de Anatomía, Histología y Neurociencia, Universidad Autónoma de Madrid, Calle Arzobispo Morcillo, 4, 28029 Madrid, Spain.
| | - Elena Bañón-Boulet
- Departamento de Anatomía, Histología y Neurociencia, Universidad Autónoma de Madrid, Calle Arzobispo Morcillo, 4, 28029 Madrid, Spain.
| | - Lorena Jiménez-Sánchez
- Departamento de Anatomía, Histología y Neurociencia, Universidad Autónoma de Madrid, Calle Arzobispo Morcillo, 4, 28029 Madrid, Spain; Wellcome Translational Neuroscience Ph.D. Program, Centre for Clinical Brain Sciences, University of Edinburgh, 49 Little France Crescent, Edinburgh EH16 4SB, Scotland, UK.
| | - Clotilde Rivier-Julien
- Departamento de Anatomía, Histología y Neurociencia, Universidad Autónoma de Madrid, Calle Arzobispo Morcillo, 4, 28029 Madrid, Spain.
| | - Manuel Barrueco-Fernández
- Departamento de Anatomía, Histología y Neurociencia, Universidad Autónoma de Madrid, Calle Arzobispo Morcillo, 4, 28029 Madrid, Spain.
| | - Marilina S Olea
- MoMaRC Morphological Madrid Research Center, Calle Arzobispo Morcillo, 4, 28029 Madrid, Spain; Hospital Interzonal General Dr. José Penna, Av. Lainez 2401, B8000 Bahía Blanca, Buenos Aires, Argentina.
| | - Ece Yamak-Altinpulluk
- MoMaRC Morphological Madrid Research Center, Calle Arzobispo Morcillo, 4, 28029 Madrid, Spain; Department of Outcomes Research Anesthesiology Institute Cleveland Clinic, 2049 East 100th Street, Cleveland, OH 44195, USA; Department of Anesthesiology and Reanimation, University of Istambul-cerrahpasa School of Medicine, Cerrahpaşa Campus, Kocamustafapaşa Cad. No:34/E, Istanbul, Turkey; Anaesthesiology Clinical Research Office, Ataturk University, Üniversite Atatürk Üniversitesi Kampüsü, 25030 Yakutiye, Erzurum, Turkey.
| | - Ana S Teles
- MoMaRC Morphological Madrid Research Center, Calle Arzobispo Morcillo, 4, 28029 Madrid, Spain; Department of Anesthesia, Instituto Português de Oncologia Do Porto Francisco Gentil, R. Dr. António Bernardino de Almeida 62, 4200-072 Porto, Portugal.
| | - Mario Fajardo-Pérez
- MoMaRC Morphological Madrid Research Center, Calle Arzobispo Morcillo, 4, 28029 Madrid, Spain; Department of Anesthesia and Chronic Pain, Móstoles University Hospital, C. Gladiolo, s/n, 28933 Móstoles, Spain.
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El-Monajjed K, Driscoll M. Analysis of Surgical Forces Required to Gain Access Using a Probe for Minimally Invasive Spine Surgery via Cadaveric-Based Experiments Towards Use in Training Simulators. IEEE Trans Biomed Eng 2020; 68:330-339. [PMID: 32746011 DOI: 10.1109/tbme.2020.2996980] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
INTRODUCTION Virtual Reality haptic-based surgical simulators for training purposes have recently been receiving increased traction within the medical field. However, its future adoption is contingent on the accuracy and reliability of the haptic feedback. GOAL This study describes and analyzes the implementation of a set of haptic-tailored experiments to extract the force feedback of a medical probe used in minimally invasive spinal lumbar interbody fusion surgeries. METHODS Experiments to extract linear, lateral and rotational insertion, relaxation and extraction of the tool within the spinal muscles, intervertebral discs and lumbar nerve on two cadaveric torsos were conducted. RESULTS Notably, mean force-displacement and torque-angular displacement curves describing the different tool-tissue responses were reported with a maximum force of 6.87 (±1.79) N at 40 mm in the muscle and an initial rupture force through the Annulus Fibrosis of 20.550 (±7.841) N at 6.441 mm in the L4/L5 disc. CONCLUSION The analysis showed that increasing the velocity of the probe slightly reduced and delayed depth of the muscle punctures but significantly lowered the force reduction due to relaxation. Decreasing probe depth resulted with a reduction to the force relaxation drop. However, varying the puncturing angle of attack resulted with a significant effect on increasing force intensities. Finally, not resecting the thoracolumbar fascia prior to puncturing the muscle resulted with a significant increase in the force intensities. SIGNIFICANCE These results present a complete characterization of the input required for probe access for spinal surgeries to provide an accurate haptic response in training simulators.
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Beck T, Kilchling T, Reese S, Brühschwein A, Meyer-Lindenberg A. Influence of storage on the quality of conventional CT and µCT-imaging for the middle and inner cat ear. Anat Sci Int 2019; 95:190-201. [PMID: 31728859 DOI: 10.1007/s12565-019-00509-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 11/04/2019] [Indexed: 10/25/2022]
Abstract
The aim of this study was to analyze whether different fixation methods such as freezing or formaldehyde storage for different periods of time have an influence on the recognition of anatomical relevant structures in the middle and inner ear of the cat with conventional computed tomography (cCT) and micro-computed tomography (µCT). Besides, effects of freeze-thaw cycles on determined structures of the ear were investigated by means of histological slices. Three veterinarians with different radiologic expertise evaluated the scans of 30 dissected cat ears anonymously and scored predefined structures in a five-point scale with reference to visually sharp reproducibility and perfect image quality. The total scores of the different fixation groups as well as the ears within a group were compared with each other. Furthermore, an intra-reader examination including an evaluation of the identifiability of specified structures was performed for both imaging methods. cCT as well as µCT-scans have a very low variation coefficient of 1.6% and 2.3%, respectively. The results for the alterations between the different fixation methods show that the changes for cCT-scans are negligible, as the percentage alteration compared to fresh samples ranges in a very small interval with values from 1.0% better to 1.2% worse. µCT-scans are more influenced by the fixation method with a range from 1.3% better to 6.9% worse values. The scans mostly deteriorated after two freeze-thaw cycles (1.8% worse) and after storing the samples for 1 (2.4% worse), respectively, and 3 weeks in formaldehyde (6.9% worse).
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Affiliation(s)
- Tobias Beck
- Clinic for Small Animal Surgery and Reproduction, Ludwig-Maximilians-University Munich, Veterinärstraße 13, 80539, Munich, Germany. .,, Wolfratshausen, Germany.
| | - T Kilchling
- Clinic for Small Animal Surgery and Reproduction, Ludwig-Maximilians-University Munich, Veterinärstraße 13, 80539, Munich, Germany.,, Baden-Baden, Germany
| | - S Reese
- Veterinary Department, Institute of Veterinary Anatomy, Histology and Embryology, Ludwig-Maximilians-University Munich, Veterinärstraße 13, 80539, Munich, Germany
| | - A Brühschwein
- Clinic for Small Animal Surgery and Reproduction, Ludwig-Maximilians-University Munich, Veterinärstraße 13, 80539, Munich, Germany
| | - Andrea Meyer-Lindenberg
- Clinic for Small Animal Surgery and Reproduction, Ludwig-Maximilians-University Munich, Veterinärstraße 13, 80539, Munich, Germany
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Tisch C, Brencicova E, Schwendener N, Lombardo P, Jackowski C, Zech WD. Hounsfield unit values of liver pathologies in unenhanced post-mortem computed tomography. Int J Legal Med 2019; 133:1861-1867. [DOI: 10.1007/s00414-019-02016-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 02/01/2019] [Indexed: 12/11/2022]
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Rapid and reliable detection of previous freezing of cerebral tissue by computed tomography and magnetic resonance imaging. Forensic Sci Med Pathol 2018; 14:85-94. [DOI: 10.1007/s12024-018-9955-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/11/2018] [Indexed: 10/18/2022]
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