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L’Her E, Geeraerts T, Desclefs JP, Benhamou D, Blanie A, Cerf C, Delmas V, Jourdain M, Lecomte F, Ouanes I, Garnier M, Mossadegh C. Recommandations de pratiques professionnelles : Intérêts de l’apprentissage par simulation en soins critiques. ANNALES FRANCAISES DE MEDECINE D URGENCE 2022. [DOI: 10.3166/afmu-2022-0411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Abeysekera N, Whitmore KA, Abeysekera A, Pang G, Laupland KB. Applications of 3D printing in critical care medicine: A scoping review. Anaesth Intensive Care 2021; 49:164-172. [PMID: 33789504 DOI: 10.1177/0310057x20976655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Although a wide range of medical applications for three-dimensional printing technology have been recognised, little has been described about its utility in critical care medicine. The aim of this review was to identify three-dimensional printing applications related to critical care practice. A scoping review of the literature was conducted via a systematic search of three databases. A priori specified themes included airway management, procedural support, and simulation and medical education. The search identified 1544 articles, of which 65 were included. Ranging across many applications, most were published since 2016 in non - critical care discipline-specific journals. Most studies related to the application of three-dimensional printed models of simulation and reported good fidelity; however, several studies reported that the models poorly represented human tissue characteristics. Randomised controlled trials found some models were equivalent to commercial airway-related skills trainers. Several studies relating to the use of three-dimensional printing model simulations for spinal and neuraxial procedures reported a high degree of realism, including ultrasonography applications three-dimensional printing technologies. This scoping review identified several novel applications for three-dimensional printing in critical care medicine. Three-dimensional printing technologies have been under-utilised in critical care and provide opportunities for future research.
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Affiliation(s)
- Natasha Abeysekera
- Intensive Care Services, Royal Brisbane and Women's Hospital, Herston, Australia
| | - Kirsty A Whitmore
- Intensive Care Services, Royal Brisbane and Women's Hospital, Herston, Australia.,Faculty of Medicine, University of Queensland, Herston, Australia
| | - Ashvini Abeysekera
- Otolaryngology and Head and Neck Surgery, Royal Brisbane and Women's Hospital, Herston, Australia
| | - George Pang
- Intensive Care Services, Royal Brisbane and Women's Hospital, Herston, Australia
| | - Kevin B Laupland
- Intensive Care Services, Royal Brisbane and Women's Hospital, Herston, Australia.,Faculty of Health, Queensland University of Technology (QUT), Kelvin Grove, Australia
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Liu Z, Bible J, Wells J, Vadivalagan D, Singapogu R. Examining the Effect of Haptic Factors for Vascular Palpation Skill Assessment Using an Affordable Simulator. IEEE OPEN JOURNAL OF ENGINEERING IN MEDICINE AND BIOLOGY 2020; 1:228-234. [PMID: 33681817 PMCID: PMC7932134 DOI: 10.1109/ojemb.2020.3017156] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Goal: Simulators that incorporate haptic feedback for clinical skills training are increasingly used in medical education. This study addresses the neglected aspect of rendering simulated feedback for vascular palpation skills training by systematically examining the effect of haptic factors on performance. Methods: A simulator-based approach to examine palpation skill is presented. Novice participants with and without minimal previous palpation training performed a palpation task on a simulator that rendered controlled vibratory feedback under various conditions. Results: Five objective metrics were employed to analyze participants’ performance that yielded key findings in quantifying palpation performance. Participants’ palpation accuracy was influenced by all three haptic factors, ranging from moderate to statistically significant. Duration, Total Path Length and Ratio of Correct Movement also demonstrated utility for quantifying performance. Conclusions: We demonstrate that our affordable simulator is capable of rendering controlled haptic feedback suitable for skills training. Further, metrics presented in this study can be used for structured palpation skills assessment and training, potentially improving healthcare delivery.
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Affiliation(s)
- Zhanhe Liu
- Department of Bioengineering, Clemson University, Clemson, SC 29634, USA
| | - Joseph Bible
- Department of Mathematical and Statistical Sciences, Clemson University, SC 29634, USA
| | - Jared Wells
- Department of Bioengineering, Clemson University, Clemson, SC 29634, USA
| | - Deepak Vadivalagan
- Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USA
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Black RA, Houston G. 40th Anniversary Issue: Reflections on papers from the archive on "Cardiovascular devices and modelling". Med Eng Phys 2020; 72:74-75. [PMID: 31554581 DOI: 10.1016/j.medengphy.2019.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Richard A Black
- Department of Biomedical Engineering, University of Strathclyde, Glasgow, Scotland, UK.
| | - Gregor Houston
- Department of Biomedical Engineering, University of Strathclyde, Glasgow, Scotland, UK
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L'Her E, Geeraerts T, Desclefs JP, Benhamou D, Blanié A, Cerf C, Delmas V, Jourdain M, Lecomte F, Ouanes I, Garnier M, Mossadegh C. Simulation-based teaching in critical care, anaesthesia and emergency medicine. Anaesth Crit Care Pain Med 2020; 39:311-326. [PMID: 32223994 DOI: 10.1016/j.accpm.2020.03.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Erwan L'Her
- Centre Hospitalier Régional Universitaire de Brest, La Cavale-Blanche, Médecine Intensive et Réanimation, LATIM, INSERM, UMR 1101, boulevard Tanguy-Prigent, 29609 Brest cedex, France.
| | - Thomas Geeraerts
- Anesthésie-Réanimation, CHU de Toulouse, Hôpital Pierre-Paul-Riquet, Institut Toulousain de Simulation en Santé (ItSimS), Université Toulouse 3-Paul-Sabatier, place du Docteur-Baylac, TSA 40031, 31059 Toulouse cedex 9, France
| | - Jean-Philippe Desclefs
- Samu 91, Smur de Corbeil-Essonnes, Centre Hospitalier Sud-Francilien, 91100 Corbeil-Essonnes, France
| | - Dan Benhamou
- Service d'Anesthésie-Réanimation, Hôpitaux Universitaires Paris-Sud, AP-HP, Hôpital Bicêtre, 78, rue du Général-Leclerc, 94275 Le Kremlin-Bicêtre, France
| | - Antonia Blanié
- Département d'anesthésie-réanimation-médecine périopératoire, groupe hospitalo-universitaire, Paris-Saclay, AP-HP, Paris, France; Centre de simulation LabForSIMS, faculté de médecine Paris-Sud, unité de recherche CIAMS, EA4532, UFR STAPS Paris-Sud, Orsay, France
| | - Charles Cerf
- Réanimation Polyvalente, Hôpital Foch, 40, rue Worth, 92150 Suresnes, France
| | - Véronique Delmas
- Urgences, CHU Le Mans, 194, avenue Rubillard, 72000 Le Mans, France
| | - Mercedes Jourdain
- Réanimation médicale, Hôpital Salengro, rue Émile-Laine, 59037 Lille, France
| | - François Lecomte
- Urgences, Hôpital Cochin, 27, rue du Faubourg-Saint-Jacques, 75014 Paris, France
| | - Islem Ouanes
- Réanimation Médicale, Hôpital Fattouma-Bourguiba, avenue Farhat-Hached, Monastir, Tunisia
| | - Marc Garnier
- Département d'anesthésie et réanimation, Pôle Thorax-Voies Aériennes-Anesthésie-Réanimation, Hôpital Tenon, 4, rue de la Chine, 75020 Paris, France; INSERM, UMR1152, Faculté de médecine X.-Bichat, 16, rue Henri-Huchard, 75018 Paris, France
| | - Chirine Mossadegh
- Hôpital Universitaire La Pitié-Salpêtrière, Service de Réanimation Médicale, 47-83, boulevard de l'Hôpital, 75651 Paris cedex 13, France
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White SC, Sedler J, Jones TW, Seckeler M. Utility of three-dimensional models in resident education on simple and complex intracardiac congenital heart defects. CONGENIT HEART DIS 2018; 13:1045-1049. [PMID: 30230245 DOI: 10.1111/chd.12673] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 08/02/2018] [Accepted: 08/17/2018] [Indexed: 12/01/2022]
Abstract
OBJECTIVE Applications of three-dimensional (3D) printed models in medicine include preprocedure planning, patient education, and clinical training. Reproducing complex anatomy as a 3D printed model can be useful for understanding congenital heart defects (CHD). We hypothesized that using 3D printed models during didactic sessions with resident physicians will improve trainees' understanding of CHD. DESIGN AND INTERVENTION We performed a prospective, randomized educational intervention for teaching pediatric and pediatric/emergency medicine residents about simple (ventricular septal defect [VSD]) and moderately complex (tetralogy of Fallot [ToF]) CHD. Residents were divided into two groups: intervention and control. Each group completed a subjective survey about their comfort with the anatomy, evaluation, and treatment of VSD and ToF and took an objective test on VSD and ToF. They separately received the same 20 min lecture, including projected two-dimensional digital images of VSD and ToF; the intervention group was given 3D printed models created using the same imaging data. After the lecture, the groups repeated the survey and test questions. RESULTS Twenty-six residents participated in the VSD session, 34 in the ToF. There were no differences in demographics between control and intervention groups. All residents had higher subjective comfort with VSD and ToF after the lectures. There was no difference in baseline test scores for VSD or ToF groups. The control group scored higher on the VSD postlecture test. The intervention group scored higher on the ToF postlecture test. CONCLUSION Incorporation of 3D printed models into lectures about CHD imparts a greater acute level of understanding, both subjective and objective, for pediatric and combined pediatric/emergency medicine residents. There does not seem to be an added benefit for understanding ventricular septal defects, but there is for tetralogy of Fallot, likely due to increased complexity of the lesion and difficulty visualizing spatial relationships in CHD with multiple components.
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Affiliation(s)
- Shelby C White
- Department of Pediatrics (Cardiology), University of Arizona, Tucson, Arizona
| | | | - Trahern W Jones
- Department of Pediatrics, University of Arizona, Tucson, Arizona
| | - Michael Seckeler
- Department of Pediatrics (Cardiology), University of Arizona, Tucson, Arizona
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Jones TW, Seckeler MD. Use of 3D models of vascular rings and slings to improve resident education. CONGENIT HEART DIS 2017; 12:578-582. [PMID: 28608434 DOI: 10.1111/chd.12486] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2017] [Revised: 05/05/2017] [Accepted: 05/11/2017] [Indexed: 01/17/2023]
Abstract
OBJECTIVE Three-dimensional (3D) printing is a manufacturing method by which an object is created in an additive process, and can be used with medical imaging data to generate accurate physical reproductions of organs and tissues for a variety of applications. We hypothesized that using 3D printed models of congenital cardiovascular lesions to supplement an educational lecture would improve learners' scores on a board-style examination. DESIGN AND INTERVENTION Patients with normal and abnormal aortic arches were selected and anonymized to generate 3D printed models. A cohort of pediatric and combined pediatric/emergency medicine residents were then randomized to intervention and control groups. Each participant was given a subjective survey and an objective board-style pretest. Each group received the same 20-minutes lecture on vascular rings and slings. During the intervention group's lecture, 3D printed physical models of each lesion were distributed for inspection. After each lecture, both groups completed the same subjective survey and objective board-style test to assess their comfort with and postlecture knowledge of vascular rings. RESULTS There were no differences in the basic demographics of the two groups. After the lectures, both groups' subjective comfort levels increased. Both groups' scores on the objective test improved, but the intervention group scored higher on the posttest. CONCLUSIONS This study demonstrated a measurable gain in knowledge about vascular rings and pulmonary artery slings with the addition of 3D printed models of the defects. Future applications of this teaching modality could extend to other congenital cardiac lesions and different learners.
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Affiliation(s)
- Trahern W Jones
- Department of Pediatrics, University of Arizona College of Medicine, Arizona, USA
| | - Michael D Seckeler
- Department of Pediatrics, University of Arizona College of Medicine, Arizona, USA
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Halabian M, Beigzadeh B, Karimi A, Shirazi HA, Shaali MH. A combination of experimental and finite element analyses of needle-tissue interaction to compute the stresses and deformations during injection at different angles. J Clin Monit Comput 2016; 30:965-975. [PMID: 26515741 DOI: 10.1007/s10877-015-9801-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Accepted: 10/26/2015] [Indexed: 11/30/2022]
Abstract
One of the main clinical applications of the needles is its practical usage in the femoral vein catheterization. Annually more than two million peoples in the United States are exposed to femoral vein catheterization. How to use the input needles into the femoral vein has a key role in the sense of pain in post-injection and possible injuries, such as tissue damage and bleeding. It has been shown that there might be a correlation between the stresses and deformations due to femoral injection to the tissue and the sense of pain and, consequently, injuries caused by needles. In this study, the stresses and deformations induced by the needle to the femoral tissue were experimentally and numerically investigated in response to an input needle at four different angles, i.e., 30°, 45°, 60°, and 90°, via finite element method. In addition, a set of experimental injections at different angles were carried out to compare the numerical results with that of the experimental ones, namely pain score. The results revealed that by increasing the angle of injection up to 60°, the strain at the interaction site of the needle-tissue is increased accordingly while a significant falling is observed at the angle of 90°. In contrast, the stress due to injection was decreased at the region of needle-tissue interaction with showing the lowest one at the angle of 90°. Experimental results were also well confirmed the numerical observations since the lowest pain score was seen at the angle of 90°. The results suggest that the most effective angle of injection would be 90° due to a lower amount of stresses and deformations compared to the other angles of injection. These findings may have implications not only for understating the stresses and deformations induced during injection around the needle-tissue interaction, but also to give an outlook to the doctors to implement the most suitable angle of injection in order to reduce the pain as well as post injury of the patients.
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Affiliation(s)
- Mahdi Halabian
- School of Mechanical Engineering, Iran University of Science and Technology, Tehran, 16846, Iran.,Tissue Engineering and Biological Systems Research Laboratory, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, 16886, Iran
| | - Borhan Beigzadeh
- School of Mechanical Engineering, Iran University of Science and Technology, Tehran, 16846, Iran
| | - Alireza Karimi
- School of Mechanical Engineering, Iran University of Science and Technology, Tehran, 16846, Iran. .,Tissue Engineering and Biological Systems Research Laboratory, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, 16886, Iran. .,Department of Mechanical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.
| | - Hadi Asgharzadeh Shirazi
- School of Mechanical Engineering, Iran University of Science and Technology, Tehran, 16846, Iran.,Tissue Engineering and Biological Systems Research Laboratory, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, 16886, Iran
| | - Mohammad Hasan Shaali
- School of Mechanical Engineering, Iran University of Science and Technology, Tehran, 16846, Iran
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9
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Seto AH, Kern MJ. Simulator training: The bridge between “primum non nocere” and “learning by doing”. Catheter Cardiovasc Interv 2016; 87:381-2. [DOI: 10.1002/ccd.26432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 01/06/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Arnold H. Seto
- Division of Cardiology, Department of Medicine; Long Beach Veteran's Affairs Medical Center; California 90822
| | - Morton J. Kern
- Division of Cardiology, Department of Medicine; Long Beach Veteran's Affairs Medical Center; California 90822
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O'Reilly MK, Reese S, Herlihy T, Geoghegan T, Cantwell CP, Feeney RNM, Jones JFX. Fabrication and assessment of 3D printed anatomical models of the lower limb for anatomical teaching and femoral vessel access training in medicine. ANATOMICAL SCIENCES EDUCATION 2016; 9:71-79. [PMID: 26109268 DOI: 10.1002/ase.1538] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 03/27/2015] [Accepted: 04/13/2015] [Indexed: 06/04/2023]
Abstract
For centuries, cadaveric dissection has been the touchstone of anatomy education. It offers a medical student intimate access to his or her first patient. In contrast to idealized artisan anatomical models, it presents the natural variation of anatomy in fine detail. However, a new teaching construct has appeared recently in which artificial cadavers are manufactured through three-dimensional (3D) printing of patient specific radiological data sets. In this article, a simple powder based printer is made more versatile to manufacture hard bones, silicone muscles and perfusable blood vessels. The approach involves blending modern approaches (3D printing) with more ancient ones (casting and lost-wax techniques). These anatomically accurate models can augment the approach to anatomy teaching from dissection to synthesis of 3D-printed parts held together with embedded rare earth magnets. Vascular simulation is possible through application of pumps and artificial blood. The resulting arteries and veins can be cannulated and imaged with Doppler ultrasound. In some respects, 3D-printed anatomy is superior to older teaching methods because the parts are cheap, scalable, they can cover the entire age span, they can be both dissected and reassembled and the data files can be printed anywhere in the world and mass produced. Anatomical diversity can be collated as a digital repository and reprinted rather than waiting for the rare variant to appear in the dissection room. It is predicted that 3D printing will revolutionize anatomy when poly-material printing is perfected in the early 21st century.
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Affiliation(s)
- Michael K O'Reilly
- Anatomy in the Biomedical Section, School of Medicine and Medical Science, University College Dublin, Dublin, Ireland
| | - Sven Reese
- Department of Veterinary Sciences, Section of Anatomy, Histology, and Embryology, Faculty of Veterinary Medicine, University of Munich, Munich, Germany
| | - Therese Herlihy
- Diagnostic Imaging, School of Medicine and Medical Science, University College Dublin, Dublin, Ireland
| | - Tony Geoghegan
- Department of Interventional Radiology, Mater Misericordiae University Hospital, Dublin, Ireland
| | - Colin P Cantwell
- Department of Radiology, St. Vincent's University Hospital, Dublin, Ireland
| | - Robin N M Feeney
- Anatomy in the Biomedical Section, School of Medicine and Medical Science, University College Dublin, Dublin, Ireland
| | - James F X Jones
- Anatomy in the Biomedical Section, School of Medicine and Medical Science, University College Dublin, Dublin, Ireland
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Gurm HS, Sanz-Guerrero J, Johnson DD, Jensen A, Seth M, Chetcuti SJ, Lalonde T, Greenbaum A, Dixon SR, Shih A. Using simulation for teaching femoral arterial access: A multicentric collaboration. Catheter Cardiovasc Interv 2015; 87:376-80. [PMID: 26489781 DOI: 10.1002/ccd.26256] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Accepted: 09/16/2015] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To assess the impact of simulation training on complications associated with femoral arterial access obtained by first year cardiology fellows. BACKGROUND Prior studies demonstrate a higher incidence of arterial access related complications among patients undergoing invasive cardiac procedures. METHODS First year cardiology fellows at four teaching hospitals in Michigan tracked their femoral access experience and any associated complications between July 2011 and June 2013. Fellows starting their academic training in July 2012 were first trained on a specially developed simulator before starting their rotation in the catheterization laboratory. The primary outcome was access proficiency, defined as five successful femoral access attempts without any complication or need to seek help from a more experienced team member. RESULTS A total of 1,278 femoral access attempts were made by 21 fellows in 2011-2012 compared with 869 femoral access attempts made by 21 fellows in 2012-2013. There was a lower rate of access related complications in patients undergoing access attempts by first year fellows in year 2 compared with year 1 (2.1% versus 4.5%, P = 0.003). The number of procedures to achieve procedural proficiency was significantly higher in year 1 compared with year 2 (median 20 versus 10, P = 0.007). CONCLUSIONS Incorporation of simulation in the training of first year fellows was associated with an improvement in proficiency and a clinically meaningful reduction in vascular complications.
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Affiliation(s)
- Hitinder S Gurm
- Division of Cardiovascular Medicine, University of Michigan, Ann Arbor, Michigan
| | - Jorge Sanz-Guerrero
- Facultades De Ingenieria Medicina Y Ciencias Biologicas, Instituto De Ingenieria Biologica Y Medica, Pontificia Universidad Catolica De Chile, Santiago, Chile.,Department of Mechanical Engineering, Wu Manufacturing Research Center University of Michigan, Ann Arbor, Michigan
| | - Daniel D Johnson
- Department of Mechanical Engineering, Wu Manufacturing Research Center University of Michigan, Ann Arbor, Michigan
| | - Andrea Jensen
- Division of Cardiovascular Medicine, University of Michigan, Ann Arbor, Michigan
| | - Milan Seth
- Division of Cardiovascular Medicine, University of Michigan, Ann Arbor, Michigan
| | - Stanley J Chetcuti
- Division of Cardiovascular Medicine, University of Michigan, Ann Arbor, Michigan
| | - Thomas Lalonde
- Department of Cardiovascular Medicine, St. John Hospital, Detroit, Michigan
| | - Adam Greenbaum
- Division of Cardiovascular Medicine, Henry Ford Hospital, Detroit, Michigan
| | - Simon R Dixon
- Department of Cardiovascular Medicine, Beaumont Hospital, Royal Oak, Michigan
| | - Albert Shih
- Department of Mechanical Engineering, Wu Manufacturing Research Center University of Michigan, Ann Arbor, Michigan.,Biomedical Engineering, University of Michigan, Ann Arbor
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Abstract
Three-dimensional (3-D) printing technology has rapidly developed in the last few decades. Meanwhile, the application of this technology has reached beyond the engineering field and expanded to almost all disciplines, including medicine. There has been much research on the medical applications of 3-D printing in neurosurgery, orthopedics, maxillofacial surgery, plastic surgery, tissue engineering, as well as other fields. Because of the complexity of the cardiovascular system, the application of this technology is limited and difficult, as compared to other disciplines, and thus there is much room for future development. Many of the difficulties associated with this technology must be overcome. Nonetheless, there is no doubt that 3-D printing technology will benefit patients with cardiovascular diseases in the near future.
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Affiliation(s)
- Di Shi
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Kai Liu
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Xin Zhang
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Hang Liao
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Xiaoping Chen
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, 610041, China.
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14
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Bone geometry on the contact stress in the shoulder for evaluation of pressure ulcers: finite element modeling and experimental validation. Med Eng Phys 2015; 37:187-94. [PMID: 25575962 DOI: 10.1016/j.medengphy.2014.11.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Revised: 08/20/2014] [Accepted: 11/29/2014] [Indexed: 11/22/2022]
Abstract
This research presents the finite element modeling (FEM) of human-specific computed tomography (CT) data to study the effect of bone prominences on contact stress in the shoulder for prevention of pressure ulcers. The 3D geometry of scapula, skin, and surrounding soft tissues in the shoulder was reconstructed based on the anonymous CT data of a human subject in a prone posture (without loading on the shoulder) for FEM analysis of the contact stress. FEM analysis results show that the maximum stress is located at the prominence of the scapula with sharp bone geometry. This demonstrates that stress concentration at the bone prominence is a significant factor to cause the high contact stress, which is a source for pressure ulcers. For experimental validation, a physical shoulder model manufactured by 3D printing of the bone geometry and the mold for molding of tissue-mimicking silicone was developed. Compression tests of the mattress foam and silicone were conducted to find the nonlinear stress-strain relations as inputs for FEM. Experiments of compressing the shoulder model against the foam were carried out. Three flexible force sensors were embedded inside the model to measure the contact forces and compared to the FEM predictions. Results show that the FEM predicted forces match well with the experimental measurements and demonstrate that FEM can accurately predict the stress distributions in the shoulder to study the effect of bone geometry on the inception of pressure ulcers.
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