Fong‐Chin Su

National Cheng Kung University

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Li‐Chieh Kuo

National Cheng Kung University

132

I‐Ming Jou

E-Da Hospital

Hsiu‐Yun Hsu

National Cheng Kung University

You-Li Chou

Kaohsiung Chang Gung Memorial Hospital

Tai‐Hua Yang

National Cheng Kung University

Chien-Ju Lin

National Cheng Kung University

Hsiao-Feng Chieh

National Cheng Kung University

Lan-Yuen Guo

Kaohsiung Medical University

Cheng‐Feng Lin

National Cheng Kung University

Po‐Ting Wu

National Cheng Kung University

Cooperative Institutions

National Cheng Kung University

458

National Cheng Kung University Hospital

134

Kaohsiung Medical University

National Taiwan University

National Yang Ming Chiao Tung University

China Medical University

Mayo Clinic

Chang Gung University

Kaohsiung Medical University Chung-Ho Memorial Hospital

National Taiwan University Hospital

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Virtual hand modeling for ultrasound-guided percutaneous surgical simulator

Hsin-Chen Chen Tai‐Hua Yang Chih-Kai Chen Min-Tzu Chu I‐Ming Jou

Percutaneous surgery, which accesses to inner organs via "needle-puncture" of the skin rather than an "open" approach, has gotten greater attention and preference in clinic. So far, using cadavers as a medium for surgeons' skill training for percutaneous release procedures remains the most common training approach, which is extremely costly in materials and untraceable in procedures. In this study we investigate a new virtual hand modeling framework for developing an ultrasound (US)-guided percutaneous release simulator. Our framework first builds a finger joint model with bones, tendons, skin surface, and joint mechanism from magnetic resonance (MR) images of a human hand. Then, we design a joint-constraint registration method to fuse MR and US hand images of the same subject. Lastly, the fused image sets are warped to match the spatial configuration of a phantom hand by a thin-plate spline (TPS) warping scheme with incremental anatomical landmarks. Experiments showed that our framework incorporating anatomical and biomechanical constraints efficiently accommodated for pose and intensity variations of an articulated structure among different modality images, thus providing a promising medium of virtual MR-US image model for practicing percutaneous release surgery.

3D ultrasound

Surgical simulation

10.1109/hic.2014.7038925

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Biomechanical analysis of force distribution in one-handed and two-handed child chest compression- a randomized crossover observational study

BMC Emergency Medicine (2022)

Jui-Yi Tsou Chia‐Lung Kao Yi‐Fang Tu Ming‐Yuan Hong Fong‐Chin Su

Abstract Background E ven force distribution would generate efficient external chest compression (ECC). Little research has been done to compare force distribution between one-hand (OH) and two-handed (TH) during child ECC. Therefore, this study was to investigate force distribution, rescuer perceived fatigue and discomfort/pain when applying OH and TH ECC in children. Methods Crossover manikin study. Thirty-five emergency department registered nurses performed lone rescuer ECC using TH and OH techniques, each for 2 min at a rate of at least 100 compressions/min. A Resusci Junior Basic manikin equipped with a MatScan pressure measurement system was used to collect data. The perceived exertion scale (modified Borg scale) and numerical rating scale (NRS) was applied to evaluate the fatigue and physical pain of delivering chest compressions. Results The maximum compression force (kg) delivered was 56.58 ± 13.67 for TH and 45.12 ± 7.90 for OH ECC ( p < 0.001). The maximum-minimum force difference force delivered by TH and OH ECC was 52.24 ± 13.43 and 41.36 ± 7.57, respectively ( p < 0.001). The mean caudal force delivered by TH and OH ECC was 29.45 ± 16.70 and 34.03 ± 12.01, respectively ( p = 0.198). The mean cranial force delivered by TH and OH ECC was 27.13 ± 11.30 and 11.09 ± 9.72, respectively ( p < 0.001). The caudal–cranial pressure difference delivered by TH and OH ECC was 19.14 ± 15.96 and 26.94 ± 14.48, respectively ( p = 0.016). The perceived exertion and NRS for OH ECC was higher than that of the TH method ( p < 0.001, p = 0.004, respectively). Conclusions The TH method produced greater compression force, had more efficient compression, and delivered a more even force distribution, and produced less fatigue and physical pain in the rescuer than the OH method. Trial registration The Cheng Kung University Institutional Review Board A-ER-103-387. http://nckuhirb.med.ncku.edu.tw/sitemap.php

Crossover study

10.1186/s12873-022-00566-z

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Citations (2)

Assessing Finger Joint Biomechanics by Applying Equal Force to Flexor Tendons In Vitro Using a Novel Simultaneous Approach

PLoS ONE (2016)

Tai‐Hua Yang Szu‐Ching Lu Wei-Jr Lin Kristin D. Zhao Chunfeng Zhao

The flexor digitorum superficialis (FDS) and flexor digitorum profundus (FDP) are critical for finger flexion. Although research has recently focused on these tendons' coactivity, their contributions in different tasks remain unclear. This study created a novel simultaneous approach to investigate the coactivity between the tendons and to clarify their contributions in different tasks.Ten human cadaveric hands were mounted on our custom frame with the FDS and FDP of the third finger looped through a mechanical pulley connected to a force transducer. Joint range of motion, tendon excursion and loading force were recorded during individual joint motion and free joint movement from rest to maximal flexion. Each flexor tendon's moment arm was then calculated.In individual motions, we found that the FDP contributed more than the FDS in proximal interphalangeal (PIP) joint motion, with an overall slope of 1.34 and all FDP-to-FDS excursion (P/S) ratios greater than 1.0 with force increase. However, the FDP contributed less than the FDS in metacarpophalangeal (MCP) joint motion, with an overall slope of 0.95 and P/S ratios smaller than 1.0 throughout the whole motion except between 1.9% and 13.1% force. In free joint movement, the FDP played a greater role than the FDS, with an overall ratio of 1.37 and all P/S ratios greater than 1.0.The new findings include differences in finger performance and excursion amounts between the FDS and FDP throughout flexion. Such findings may provide the basis for new hand models and treatments.

Cadaveric spasm

Biomechanics

Interphalangeal Joint

Excursion

Finger joint

Metacarpophalangeal joint

10.1371/journal.pone.0160301

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Citations (55)

The Motion Analysis System and Goniometry of the Finger Joints

Journal of Hand Surgery (European Volume) (1998)

H-Y. CHIU Fong‐Chin Su S. H. Wang H-Y. HSU

The application of a video-based motion analysis system for goniometry of finger joints during measurement of the fingertip motion area has been assessed. The results indicate that the motion analysis system is reliable for angular measurements of finger joints that are comparable with those obtained by conventional goniometer. The advantages of using the motion analysis system is that it can record and show the changes in angle of all finger joints continuously during finger motion.

Goniometer

Motion analysis

10.1016/s0266-7681(98)80098-3

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Citations (63)

The influence of FAs complexity and architectures of cytoskeleton on morphology during cell initial spreading

The FASEB Journal (2012)

Weiyin Lin Ting-Jung Chen Chia-Ching Wu Fong‐Chin Su

The cytoskeleton controls intracellular force equilibrium and force transmission from attachment substrate to focal adhesions (FAs). During epithelial‐mesenchymal transition (EMT), essential process for numerous developmental processes, cell morphology has dramatically change by alter force balance between extracellular matrix (ECM) and cytoskeletons. The force and tension pattern change in cytoskeleton in relation to different morphology is still unknown. Our objective is to simulate the dynamics of intracellular force distribution and total stored energy during cell spreading by using the cytoskeleton tensegrity model with the pre‐tensed actin filaments and the pre‐compressed microtubules. The Madin‐Darby Canine Kidney (MDCK) cell, bovine aortic endothelium cell (BAEC), and myoblastoma cell (C2C12) and NIH 3T3 fibroblast (NIH 3T3) represents each step of EMT. The coordination of FA was used for stimulation. Our results indicated that most of all MDCK and C2C12 is circle shape as compared to BAEC and NIH 3T3 which is polygon. FAs in C2C12 but not BAEC and MDCK fuse together during cell spreading. The total energy in stress fiber and microtubules will increase and decrease with spreading area respectively. Cells have different FA distribution and stress fiber arrangement present different cell morphology due to energy distribution. This study was supported by NSC in Taiwan (NSC 98‐2627‐B‐006‐010).

Stress fiber

3T3 cells

C2C12

10.1096/fasebj.26.1_supplement.1067.8

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PRELIMINARY ASSESMENT OF FLEXOR TENDONS CONTRIBUTION IN REQUIRED FINGER JOINT MOTION: A NOVEL RESEARCH METHOD

Tai‐Hua Yang Szu‐Ching Lu Wei-Jr Lin Kristine D Zhao Chunfeng Zhao

Tai-Hua Yang, Szu-Ching Lu, Wei-Jr Lin, Kristine D Zhao, Chunfeng Zhao, Li-Chieh Kuo, I-Ming Jou, Kai-Nan An, Fong-Chin Su Institute of Biomedical Engineering, Department of Computer Science & Information Engineering & Institute of Medical Informatics Department of Occupational Therapy, Department of Orthopedics, Medical Device Innovation Center, National Cheng Kung University, Taiwan, R.O.C. Department of Orthopedics, China Medical University Hospital, Taiwan, R.O.C. Orthopedic Biomechanics Laboratory, Division of Orthopedic Research, Mayo Clinic Rochester, Rochester, Minnesota Email address: fcsu@mail.ncku.edu.tw

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Optimum Propulsion Technique in Different Wheelchair Handrim Diameter

Lan-Yuen Guo Fong‐Chin Su Kai An

Manual wheelchair

Dynamometer

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Citations (3)

Biomechanical implications of angular and torsional deformities in children's gait

Gait & Posture (1996)

Chia-Chun Lin Fong‐Chin Su You-Li Chou Wulong Huang

10.1016/0966-6362(96)80658-8

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The Use of the Motion Analysis System for Evaluation of Loss of Movement in the Finger

Journal of Hand Surgery (European Volume) (2000)

H-Y. CHIU S-C. LIN Fong‐Chin Su S. H. Wang H-Y. HSU

We have used the motion analysis system to measure loss of finger movement after injury. The motion analysis system can provide information about the dynamic angular changes of each finger joint and the fingertip motion area for the injured finger. The latter can be used to calculate the percentage of fingertip motion area preserved. A stiff finger may show limited fingertip motion area with the finger joints tending to flex and extend together.

Motion analysis

Little finger

Finger joint

Ring finger

10.1054/jhsb.1999.0344

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Citations (37)

Mechanical evaluation of topical silicone gel on skin wound healing

Cheng-Hsien Chiang Cheng‐San Yang C.H. Yeh M.Y. Chen Fong‐Chin Su

Dermatix is a Food and Drug Administration (FDA) registered treatment for hypertrophic scars and keloids. Some studies have evaluated its effects on scars and tried to find out its mechanism of effectiveness. However, there were few papers discussing about the mechanical properties of wounds after treated with Dermatix. Thus, our study aims to conduct tensile test to analyze the condition of skin wound treated with Dermatix and compare the results to the non-treated wounds. We evaluated the wound healing condition at 1, 2, 4 and 6 weeks healing time and introduced recovery index to normalize the different growing condition of each rats. The results showed that during healing time 4~6 weeks, both wounds recovered rapidly. And in all the healing time, Dermatix treated group showed better tensile strength and better recovery index. However, no significant difference was found at all healing time. We guess it is occlusion, hydration and normalization of TEWL effects of Dermatix that help collagen synthesize.

Transepidermal water loss

Hypertrophic scars

Skin repair

10.1109/nebc.2009.4967834

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Citations (1)