Medical Engineering & Physics最新文献

A multiparameter comparative approach to the three-dimensional numerical analysis of the hemodynamics of total cavopulmonary connection

IF 1.7 4区医学 Q3 ENGINEERING, BIOMEDICAL

Medical Engineering & Physics

Pub Date : 2025-03-28 DOI: 10.1016/j.medengphy.2025.104331

Paulo Cesar Duarte Junior , Rudolf Huebner , Hemerson Donizete Pinheiro

Purpose

Univentricular congenital heart diseases represent a significant challenge in cardiology, requiring a complex staged treatment protocol involving total cavopulmonary connection via the Fontan procedure. The application of advanced numerical methods has proved fundamental to understanding post-surgical behavior, allowing the multidisciplinary team to design more efficient and physiologically realistic anatomies. However, the definition of boundary conditions to represent fluid behavior in anatomical changes following total cavopulmonary connection is still an emerging field, frequently relying on estimates and simplifications. This study aimed to identify an effective set of variables for simplifying the analysis of hemodynamic behavior in total cavopulmonary connection and reducing the requirement for extensive computational resources.

Methods

A multiparameter comparative analysis of simulations was performed by using several variables under rest conditions for specific Fontan configurations, accounting for factors such as turbulent versus laminar flow, Newtonian versus non-Newtonian fluid, and rigid versus flexible vascular walls.

Results

Two sets of variables were found to provide the best results: (i) Newtonian fluid behavior, turbulent flow, steady regime, and rigid walls were found suitable when the distribution of blood flow to the pulmonary arteries is the desired result and (ii) Newtonian fluid behavior, turbulent flow, transient regime, and rigid walls were found suitable when the distribution of blood flow to pulmonary arteries, shear stress, and energy loss are equally important.

Conclusion

The identified sets of variables provide a solid foundation for future analyses, ensuring reliable results and an efficient use of computational resources.

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引用次数: 0

Automated ADHD detection using dual-modal sensory data and machine learning

IF 1.7 4区医学 Q3 ENGINEERING, BIOMEDICAL

Medical Engineering & Physics

Pub Date : 2025-03-24 DOI: 10.1016/j.medengphy.2025.104328

Yanqing Ji , Janet Zhang-Lea , John Tran

This study explores using dual-modal sensory data and machine learning to objectively identify Attention-Deficit/Hyperactivity Disorder (ADHD), a neurodevelopmental disorder traditionally diagnosed through subjective clinical evaluations. Six machine learning algorithms, including Logistic Regression (LR), Random Forest (RF), XGBoost (XGB), LightGBM (LGBM), Neural Network (NN), and Support Vector Machine (SVM), were evaluated using both activity and heart rate variability (HRV) data collected from 103 participants. The results show that both activity and HRV data performed similarly when analyzed individually. However, when the two datasets were combined, the highest F1-score increased by 12 % compared to the activity data and 23 % compared to the HRV data. This combination leverages the complementary strengths of both data, representing a key contribution of our work. With the combined data, the SVM model performed best, achieving an F1-Score of 0.87 and a Matthews Correlation Coefficient of 0.77. This study highlights the significant potential of interdisciplinary collaboration and the use of diverse data sources to advance ADHD detection through cutting-edge machine learning techniques.

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引用次数: 0

Degradation of the mechanical properties of poly-lactide-caprolactone-collagen composite for pulmonary artery banding after implantation into a rat's peritoneum

IF 1.7 4区医学 Q3 ENGINEERING, BIOMEDICAL

Medical Engineering & Physics

Pub Date : 2025-03-21 DOI: 10.1016/j.medengphy.2025.104319

Lukáš Horný , Lucie Vištejnová , Tomáš Suchý , Eva Kuželová Košťáková , Hynek Chlup , Jakub Kronek , Zbyněk Sobotka , Zdeněk Petřivý , Margit Žaloudková , Kristýna Havlíčková , Jiří Moláček

Pulmonary artery banding is a surgical procedure performed when there is a shunt between the left and right ventricle. Its aim is to constrict the lumen of the pulmonary artery by using a band to reduce blood flow to the lungs. In this study, we report the results of investigating the mechanical properties of a composite composed of poly(L-lactide-co-ε-caprolactone) layers and a collagen matrix (PLCL-COLL). PLCL layers were obtained by electrospinning, impregnated with collagen solution, and finally cross-linked to increase the stiffness of the material. Bands of PLCL-COLL were implanted into a rat peritoneum and explanted after 1, 3, and 6 months in vivo. The mechanical properties of the material before and after implantation were determined using uniaxial tensile tests. The same was done with samples of strips prepared from GORE-TEX material. By comparing the results of tensile tests before implantation and after explantation, it was found that PLCL-COLL degrades in the rat's body and that it exhibits a mechanical response showing of elastic modulus values that correspond well to arterial biomechanics (elastic modulus measured in the initial linear region of the deformation was found to be: 4.14 MPa ± 1.11 MPa, 2.34 MPa ± 1.02 MPa, 1.11 MPa ± 0.77 MPa, and 0.88 MPa ± 0.60 MPa before implantation, and 1, 3, and 6 months after implantation respectively). Similar to the elastic modulus, the strength of the PLCL-COLL composite decreased during in vivo exposure (1.32 ± 0.32 MPa, 0.60 ± 0.26 MPa, 0.44 ± 0.11 MPa, and 0.46 ± 0.28 MPa before implantation, and 1, 3, and 6 months after implantation respectively). In our experiments, PLCL-COLL material was always more compliant than GORE-TEX (elastic modulus 34.7 MPa ± 2.06 MPa before implantation, and 9.35 MPa ± 6.80 MPa after implantation). The results suggest that PLCL-COLL could be a suitable candidate for the development of artery banding tapes, and also for further use in cardiovascular surgery.

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引用次数: 0

Measurement of heart rate from long-distance videos via projection of rotated orthogonal bases in POS

IF 1.7 4区医学 Q3 ENGINEERING, BIOMEDICAL

Medical Engineering & Physics

Pub Date : 2025-03-13 DOI: 10.1016/j.medengphy.2025.104326

Bing Rao , Ruige Fang , Changchen Zhao , Jie Bai

Remote photoplethysmography (rPPG) has long been an active research topic. Existing rPPG approaches achieve high accuracy of heart rate extraction, as long as the user is relatively close to the camera (typically, less than 1 meter distance). This article investigates the performance of existing rPPG approaches under the long-distance recording conditions and proposes a novel Projection of Rotated Orthogonal Bases in POS (ProPOS) algorithm for heart rate extraction. A set of orthogonal projection bases is generated around the original plain of POS algorithm. The raw measurement traces are projected on these bases and the final output signal is obtained by a designed SNR selection criterion. The long-distance rPPG (LD-rPPG) dataset is established for long-distance rPPG research by varying the recording distance from 3 m-30 m. Extensive experiments are performed in comparison with existing approaches. Experiments show that videos recorded by HikVision DS-V108 and Logitech C920 cameras contain a certain amount of physiological signal whereas the videos recorded by HikVision DS-U102D and Mercury cameras contain little physiological signal. Using zoom lenses is beneficial to improve the rPPG measurement accuracy under long-distance conditions.

{"title":"Measurement of heart rate from long-distance videos via projection of rotated orthogonal bases in POS","authors":"Bing Rao , Ruige Fang , Changchen Zhao , Jie Bai","doi":"10.1016/j.medengphy.2025.104326","DOIUrl":"10.1016/j.medengphy.2025.104326","url":null,"abstract":"<div><div>Remote photoplethysmography (rPPG) has long been an active research topic. Existing rPPG approaches achieve high accuracy of heart rate extraction, as long as the user is relatively close to the camera (typically, less than 1 meter distance). This article investigates the performance of existing rPPG approaches under the long-distance recording conditions and proposes a novel Projection of Rotated Orthogonal Bases in POS (ProPOS) algorithm for heart rate extraction. A set of orthogonal projection bases is generated around the original plain of POS algorithm. The raw measurement traces are projected on these bases and the final output signal is obtained by a designed SNR selection criterion. The long-distance rPPG (LD-rPPG) dataset is established for long-distance rPPG research by varying the recording distance from 3 m-30 m. Extensive experiments are performed in comparison with existing approaches. Experiments show that videos recorded by HikVision DS-V108 and Logitech C920 cameras contain a certain amount of physiological signal whereas the videos recorded by HikVision DS-U102D and Mercury cameras contain little physiological signal. Using zoom lenses is beneficial to improve the rPPG measurement accuracy under long-distance conditions.</div></div>","PeriodicalId":49836,"journal":{"name":"Medical Engineering & Physics","volume":"138 ","pages":"Article 104326"},"PeriodicalIF":1.7,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143642666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surgical technique and implant design affect abduction kinematics and functional outcomes after reverse shoulder arthroplasty

IF 1.7 4区医学 Q3 ENGINEERING, BIOMEDICAL

Medical Engineering & Physics

Pub Date : 2025-03-10 DOI: 10.1016/j.medengphy.2025.104323

Gillian Kane , Clarissa LeVasseur , Ajinkya Rai , Maria Munsch , Alexandra S. Gabrielli , Christopher J. Como , Jonathan D. Hughes , William Anderst , Albert Lin

The purpose of this study was to identify surgical techniques and implant geometries that influence in-vivo kinematics, functional outcomes, and clinical outcomes after reverse shoulder arthroplasty (RSA). Synchronized biplane radiographs imaged the operated shoulder during scapular plane abduction in 35 patients who received RSA within the past 2.5 ± 1.2 yrs. Shoulder kinematics and arthrokinematics (contact paths) were determined by matching subject-specific CT-based bone-plus-implant models to the radiographs using a validated tracking technique. Torque and total work done during abduction were measured using an isokinetic dynamometer. Implant characteristics and surgical techniques that were associated with kinematics/arthrokinematics, strength, or patient-reported outcomes were identified using multiple linear regression. Neck shaft angle, glenosphere size, and retroversion were associated with in-vivo kinematics and functional outcomes during abduction after RSA. These findings improve our understanding of how implant design and surgical technique impact kinematics and functional outcomes after RSA. The results highlight the necessity of in vivo data to validate cadaver-based research and computer simulations of joint function after RSA, emphasizing that those models do not account for the dynamic healing process and neuromuscular adaptations that occur after surgery.

{"title":"Surgical technique and implant design affect abduction kinematics and functional outcomes after reverse shoulder arthroplasty","authors":"Gillian Kane , Clarissa LeVasseur , Ajinkya Rai , Maria Munsch , Alexandra S. Gabrielli , Christopher J. Como , Jonathan D. Hughes , William Anderst , Albert Lin","doi":"10.1016/j.medengphy.2025.104323","DOIUrl":"10.1016/j.medengphy.2025.104323","url":null,"abstract":"<div><div>The purpose of this study was to identify surgical techniques and implant geometries that influence <em>in-vivo</em> kinematics, functional outcomes, and clinical outcomes after reverse shoulder arthroplasty (RSA). Synchronized biplane radiographs imaged the operated shoulder during scapular plane abduction in 35 patients who received RSA within the past 2.5 ± 1.2 yrs. Shoulder kinematics and arthrokinematics (contact paths) were determined by matching subject-specific CT-based bone-plus-implant models to the radiographs using a validated tracking technique. Torque and total work done during abduction were measured using an isokinetic dynamometer. Implant characteristics and surgical techniques that were associated with kinematics/arthrokinematics, strength, or patient-reported outcomes were identified using multiple linear regression. Neck shaft angle, glenosphere size, and retroversion were associated with <em>in-</em>vivo kinematics and functional outcomes during abduction after RSA. These findings improve our understanding of how implant design and surgical technique impact kinematics and functional outcomes after RSA. The results highlight the necessity of <em>in vivo</em> data to validate cadaver-based research and computer simulations of joint function after RSA, emphasizing that those models do not account for the dynamic healing process and neuromuscular adaptations that occur after surgery.</div></div>","PeriodicalId":49836,"journal":{"name":"Medical Engineering & Physics","volume":"138 ","pages":"Article 104323"},"PeriodicalIF":1.7,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of marathon running on morphological variations in the knee joint based on statistical shape modelling

IF 1.7 4区医学 Q3 ENGINEERING, BIOMEDICAL

Medical Engineering & Physics

Pub Date : 2025-03-10 DOI: 10.1016/j.medengphy.2025.104327

Chenchen Wu , Xuelian Gu , Tianyi Zhang , Niuniu Zhao , Zhiyang Xu , Xin Peng , Lingbin Xu , Bo Chen

Objective

This study investigates the morphological variations influenced by marathon running by establishing a statistical shape model (SSM) of the knee joint for non-marathon-running Chinese women and comparing it with Chinese female marathon runners.

Approach

Magnetic resonance images of the knee joints of 8 Chinese female marathon runners and 48 female non-marathon controls were collected. A SSM of knee joint geometry was developed for the control group and assessed. Each model was individually fitted to extract the principal component weights, which were analysed using independent sample t-tests and Mann–Whitney U tests to identify significance. The differences of knee joint geometry between the two groups were compared by principal component to assess the impact of marathon running on knee joint morphology.

Main results

The SSM of the control group met evaluation standards. Marathon running maybe impacts the geometric structure of the knee joint significantly, notably manifesting as an outward bulge of the lateral femoral epicondyle, expansion of the trochlea and medial tibial, slight concavity of the tibial plateau, increased uniformity of the articular surfaces of the patella, and thickening of the posteroinferior region of the patella by comparisons.

Significance

Marathon running is one of the factors that influences morphological variations in the knee joint because of physiological adaptations to muscle training, with some areas even experiencing pathogenic tendencies of bone expansion. These findings will aid in the early diagnosis of marathon-related diseases, so as to provide an opportunity for early intervention to prevent such conditions. Besides, this can provide new theoretical support for sports medicine and formulate evidence-based exercise regimes.

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引用次数: 0

The effect of bone plasticity models on simulations of primary fixation in total knee arthroplasty

IF 1.7 4区医学 Q3 ENGINEERING, BIOMEDICAL

Medical Engineering & Physics

Pub Date : 2025-03-09 DOI: 10.1016/j.medengphy.2025.104329

Navid Soltanihafshejani , Thom Bitter , Nico Verdonschot , Dennis Janssen

Predictions of primary fixation in total knee arthroplasty (TKA) can aid in implant design, optimizing long-term survival. Finite element (FE) simulations are commonly used to assess micromotions at the bone-implant interface during daily activities, requiring accurate computational models. A key factor is the material model used to simulate bone properties. This study evaluated two plastic material models—Isotropic Crushable Foam (ICF) and softening Von-Mises (sVM)—for predicting primary fixation in femoral TKA components. Mechanical tests on human femoral trabecular bone samples under cyclic loading were replicated using FE simulations with ICF and sVM models. These models were then applied to FE simulations of three femoral TKA reconstructions, representing patients aged 57, 73, and 90 years. The ICF model replicated the gradual plastic deformation observed in experiments, unlike the sVM model, and more closely matched the permanent deformation of bone samples. In primary fixation simulations, micromotions at the bone-implant interface averaged 27 µm with ICF and 17 µm with sVM. While both predictions fall within acceptable ranges, the ICF model, as a pressure-dependent material model, more accurately replicates experimental energy dissipation and plastic deformation patterns, closely mirroring human bone's plastic behavior. This makes it better suited for simulating implant-bone interface micromotions in primary TKA fixation.

{"title":"The effect of bone plasticity models on simulations of primary fixation in total knee arthroplasty","authors":"Navid Soltanihafshejani , Thom Bitter , Nico Verdonschot , Dennis Janssen","doi":"10.1016/j.medengphy.2025.104329","DOIUrl":"10.1016/j.medengphy.2025.104329","url":null,"abstract":"<div><div>Predictions of primary fixation in total knee arthroplasty (TKA) can aid in implant design, optimizing long-term survival. Finite element (FE) simulations are commonly used to assess micromotions at the bone-implant interface during daily activities, requiring accurate computational models. A key factor is the material model used to simulate bone properties. This study evaluated two plastic material models—Isotropic Crushable Foam (ICF) and softening Von-Mises (sVM)—for predicting primary fixation in femoral TKA components. Mechanical tests on human femoral trabecular bone samples under cyclic loading were replicated using FE simulations with ICF and sVM models. These models were then applied to FE simulations of three femoral TKA reconstructions, representing patients aged 57, 73, and 90 years. The ICF model replicated the gradual plastic deformation observed in experiments, unlike the sVM model, and more closely matched the permanent deformation of bone samples. In primary fixation simulations, micromotions at the bone-implant interface averaged 27 µm with ICF and 17 µm with sVM. While both predictions fall within acceptable ranges, the ICF model, as a pressure-dependent material model, more accurately replicates experimental energy dissipation and plastic deformation patterns, closely mirroring human bone's plastic behavior. This makes it better suited for simulating implant-bone interface micromotions in primary TKA fixation.</div></div>","PeriodicalId":49836,"journal":{"name":"Medical Engineering & Physics","volume":"138 ","pages":"Article 104329"},"PeriodicalIF":1.7,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Blinded prediction of custom-made pelvic implant failure using patient-specific finite element modeling

IF 1.7 4区医学 Q3 ENGINEERING, BIOMEDICAL

Medical Engineering & Physics

Pub Date : 2025-03-09 DOI: 10.1016/j.medengphy.2025.104321

Nicholas J. Dunbar , Yuhui Zhu , Ata Babazadeh-Naseri , John E. Akin , Benedetta Spazzoli , Claudio Belvedere , Davide M. Donati , Alberto Leardini , Benjamin J. Fregly

Additively manufactured, custom-made implants used for reconstruction are a promising treatment following tumor resection. However, failure rates due to mechanical factors remain high when used in the pelvis for even state-of-the-art prosthesis designs. In a collaborative effort between a clinical and an engineering research team, this study evaluated whether patient-specific biomechanical modeling could predict, in a blinded fashion, the mode and location of a clinically-observed mechanical failure. Multiple failure criteria were considered including the risk of bone fracture due to overloading or stress shielding and prosthesis fracture due to overloading or fatigue. The blinded predictions indicated that the risk of fatigue failure in the pubic screws were eight times higher than the most critical ilium screw and two times higher than the most critical cancellous screw. Simulation of stress-shielding during walking matched evidence of osteolysis in the ilium and pubis. Incorporating patient-specific modeling into the custom implant design process may lead to improved durability.

用于重建的定制添加制造假体是肿瘤切除术后一种很有前景的治疗方法。然而，即使是最先进的假体设计，在骨盆中使用时由于机械因素导致的失败率仍然很高。在临床和工程研究团队的共同努力下，这项研究评估了患者特异性生物力学建模是否能以盲法预测临床观察到的机械故障的模式和位置。研究考虑了多种失效标准，包括过载或应力屏蔽导致的骨骼断裂风险，以及过载或疲劳导致的假体断裂风险。盲法预测结果表明，耻骨螺钉的疲劳失效风险比最关键的髂骨螺钉高八倍，比最关键的松质骨螺钉高两倍。行走过程中的应力屏蔽模拟与髂骨和耻骨的骨溶解证据相匹配。将患者特异性建模纳入定制植入物设计过程可能会提高耐用性。

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引用次数: 0

Characterization of nonlinear stress relaxation of the femoral and tibial trabecular bone for computational modeling

IF 1.7 4区医学 Q3 ENGINEERING, BIOMEDICAL

Medical Engineering & Physics

Pub Date : 2025-03-08 DOI: 10.1016/j.medengphy.2025.104324

Thomas Gersie , Thom Bitter , David Wolfson , Robert Freeman , Nico Verdonschot , Dennis Janssen

Computational models of orthopedic reconstructions are reliant on bone material properties, but viscoelastic behavior of trabecular bone is often ignored in numerical simulations. The inclusion of stress relaxation could be of importance for the accuracy of models simulating the primary stability of cementless implants. In this study, a material model to describe the nonlinear viscoelastic behavior of human trabecular bone was constructed based on uniaxial stress relaxation experiments. The relationship of bone mineral density (BMD) and stress relaxation was explored, and the material model was implemented in sample-specific finite element (FE) simulations.

Cylindrical trabecular human bone specimens, from the distal femur and proximal tibia, were subjected to stress relaxation tests, undergoing compression with strains from 0.2 % to 0.8 % for 30 min on four consecutive days. The experimental data were extrapolated to 24 h. Similar levels of stress relaxation were found for femoral and tibial specimens, with an average 54.4 % stress relaxation and a maximum level of 81.6 %. Using a modified superposition model, the specimen-specific nonlinear stress relaxation behavior was captured. However, when the samples were considered collectively, no correlation was found between applied strain, BMD and the viscoelastic response. Therefore, the average level of stress relaxation in combination with existing BMD-stiffness relationships were implemented in FE simulations for each individual specimen. While the FE models, on average, overestimated the overall stiffness by 64 %, they were able to adequately capture the stress relaxation response.

{"title":"Characterization of nonlinear stress relaxation of the femoral and tibial trabecular bone for computational modeling","authors":"Thomas Gersie , Thom Bitter , David Wolfson , Robert Freeman , Nico Verdonschot , Dennis Janssen","doi":"10.1016/j.medengphy.2025.104324","DOIUrl":"10.1016/j.medengphy.2025.104324","url":null,"abstract":"<div><div>Computational models of orthopedic reconstructions are reliant on bone material properties, but viscoelastic behavior of trabecular bone is often ignored in numerical simulations. The inclusion of stress relaxation could be of importance for the accuracy of models simulating the primary stability of cementless implants. In this study, a material model to describe the nonlinear viscoelastic behavior of human trabecular bone was constructed based on uniaxial stress relaxation experiments. The relationship of bone mineral density (BMD) and stress relaxation was explored, and the material model was implemented in sample-specific finite element (FE) simulations.</div><div>Cylindrical trabecular human bone specimens, from the distal femur and proximal tibia, were subjected to stress relaxation tests, undergoing compression with strains from 0.2 % to 0.8 % for 30 min on four consecutive days. The experimental data were extrapolated to 24 h. Similar levels of stress relaxation were found for femoral and tibial specimens, with an average 54.4 % stress relaxation and a maximum level of 81.6 %. Using a modified superposition model, the specimen-specific nonlinear stress relaxation behavior was captured. However, when the samples were considered collectively, no correlation was found between applied strain, BMD and the viscoelastic response. Therefore, the average level of stress relaxation in combination with existing BMD-stiffness relationships were implemented in FE simulations for each individual specimen. While the FE models, on average, overestimated the overall stiffness by 64 %, they were able to adequately capture the stress relaxation response.</div></div>","PeriodicalId":49836,"journal":{"name":"Medical Engineering & Physics","volume":"138 ","pages":"Article 104324"},"PeriodicalIF":1.7,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A wireless intraoperative joint force sensing system for total hip arthroplasty

IF 1.7 4区医学 Q3 ENGINEERING, BIOMEDICAL

Medical Engineering & Physics

Pub Date : 2025-03-08 DOI: 10.1016/j.medengphy.2025.104325

Masaru Higa , Hiromasa Tanino , Hirai Yusuke , Inoue Seita , Mitsutake Ryo , Ito Hiroshi

A wireless sensor-instrumented femoral head was developed that enables the intraoperative measurement of three force components in a total hip arthroplasty (THA). The design of the head was 32 mm in diameter with a 12/14 taper at the bottom, being compatible with commonly available THA. Inside the femoral head, there are three Hall effect sensors paired with permanent magnets, along with a microprocessor, a Bluetooth wireless module, a noncontact reed switch, and three lithium button batteries, all components were hermetically encapsulated. These components work together to measure and transmit the hip forces applied to the head during surgery. Through bench-top calibration, the system demonstrated a mean measurement error of approximately 8 % for forces up to 800 N. Additionally the practical applications of the prosthesis were tested on three hips from two cadavers undergoing THA. The hip forces were successively measured as the hip was passively moved, revealing insights into the potential for anterior or posterior dislocations with dislocation-prone positions. Understanding these intraoperative hip forces could aid surgeons in making the optimal decisions regarding implant placement and component selection, to minimize the risk of postoperative complications such as dislocation. Overall, this sensor-instrumented prosthesis will be useful for quantifying intraoperative hip forces.

{"title":"A wireless intraoperative joint force sensing system for total hip arthroplasty","authors":"Masaru Higa , Hiromasa Tanino , Hirai Yusuke , Inoue Seita , Mitsutake Ryo , Ito Hiroshi","doi":"10.1016/j.medengphy.2025.104325","DOIUrl":"10.1016/j.medengphy.2025.104325","url":null,"abstract":"<div><div>A wireless sensor-instrumented femoral head was developed that enables the intraoperative measurement of three force components in a total hip arthroplasty (THA). The design of the head was 32 mm in diameter with a 12/14 taper at the bottom, being compatible with commonly available THA. Inside the femoral head, there are three Hall effect sensors paired with permanent magnets, along with a microprocessor, a Bluetooth wireless module, a noncontact reed switch, and three lithium button batteries, all components were hermetically encapsulated. These components work together to measure and transmit the hip forces applied to the head during surgery. Through bench-top calibration, the system demonstrated a mean measurement error of approximately 8 % for forces up to 800 N. Additionally the practical applications of the prosthesis were tested on three hips from two cadavers undergoing THA. The hip forces were successively measured as the hip was passively moved, revealing insights into the potential for anterior or posterior dislocations with dislocation-prone positions. Understanding these intraoperative hip forces could aid surgeons in making the optimal decisions regarding implant placement and component selection, to minimize the risk of postoperative complications such as dislocation. Overall, this sensor-instrumented prosthesis will be useful for quantifying intraoperative hip forces.</div></div>","PeriodicalId":49836,"journal":{"name":"Medical Engineering & Physics","volume":"138 ","pages":"Article 104325"},"PeriodicalIF":1.7,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0