We present a systematical study on comparison between water and dry coupling in photoacoustic tomography of the humanfinger joints.Compared to the direct water immersion of thefinger for water coupling,the dry couplin...We present a systematical study on comparison between water and dry coupling in photoacoustic tomography of the humanfinger joints.Compared to the direct water immersion of thefinger for water coupling,the dry coupling is realized through a transparent PDMSfilm-based water bag,which ensures water-free contact with the skin.The results obtained suggest that the dry cou-pling provides image quality comparable to that by water coupling while eliminating the wrin-kling of thefinger joint caused by the water immersion.In addition,the dry coupling offers more stable hemodynamic images than the water coupling as the water immersion of thefinger joint causes reduction in blood vessel size.展开更多
This study was undertaken to determine the bending strength properties of off-cut Yellow Meranti wood by applying the finger jointed techniques. The finger orientations that were used in this study are vertical and ho...This study was undertaken to determine the bending strength properties of off-cut Yellow Meranti wood by applying the finger jointed techniques. The finger orientations that were used in this study are vertical and horizontal finger orientation. Specimens were bonded with PVAc （polyvinyl acetate）. The bending strength properties were determined by the three point and four point bending test method. The results show that vertical finger orientation has the higher mean of modulus of rupture and the modulus of elasticity value of 24.49 MPa （28.91 MPa） and 8,814 MPa （11,668 MPa） respectively. However, the tested specimen properties did not meet the minimum strength of the solid （control） specimens.展开更多
Trauma, osteoarthritis and rheumatoid arthritis can destroy the articulating cartilage in small and large joints, especially in the metacarpo [tarso] phalangeal (MCP/MTP) and phalangeal-phalangeal (PIP) joints. Single...Trauma, osteoarthritis and rheumatoid arthritis can destroy the articulating cartilage in small and large joints, especially in the metacarpo [tarso] phalangeal (MCP/MTP) and phalangeal-phalangeal (PIP) joints. Single piece finger prosthetic designs can reduce pain and correct aesthetic issues, with problems on contemporary designs including decreased stability, lack of fixation and loss of functionality. The examined implants are representative models of currently available total joint replacement (TJR) designs for MCP replacement, such as the Swanson one piece implant. These implants have been shown clinically to have a high failure rate (up to 90%), but the cause of failure is unknown. Compressive studies using a 50 N force and medial-lateral loads of 50 N perpendicular to the longitudinal axis of the arms of the implant were individually applied. Due to material failings, lower values had to be used in some cases. Maximum stress values were found for flexion loading;the Swanson approximation had a peak stress of 8.71 GPa at the interface of the joint arm and the flexion center, Neuflex had 0.188 GPa peak stress at the fixation center of the arm, and in the center of the joint, and the Avanta design had a 5.20 GPa peak stress at the flexion center. The location and concentration of stresses on the models correspond to literature searches for clinical data, showing that the main failure mechanism for these implants is due to primary flexion-extension natural movement of the joint.展开更多
Gout is one of the most common inflammatory arthritides that predominantly affects the first metatarsophalangeal joint. The underlying inflammatory process is elicited by the deposition of monosodium urate (MSU) cryst...Gout is one of the most common inflammatory arthritides that predominantly affects the first metatarsophalangeal joint. The underlying inflammatory process is elicited by the deposition of monosodium urate (MSU) crystals in the affected joint that are termed tophi and which may in the course of chronic gout progress into subcutaneous depositions of tophi. In this case report, we present a patient (PID: 6925981) who was seen in our outpatient department with a first episode of tophaceous gout in the finger, an infrequently seen condition that mostly affects older men with long-term gout. We discuss the case in view of the current literature on diagnosis and treatment of tophaceous gout.展开更多
Brachydactyly is a general term that refers to disproportionately short fingers and toes and forms a part of the group of limb malformations characterized by bone dysostosis. Brachydactyly usually occurs either as an ...Brachydactyly is a general term that refers to disproportionately short fingers and toes and forms a part of the group of limb malformations characterized by bone dysostosis. Brachydactyly usually occurs either as an isolated malformation or as a part of a complex malformation syndrome. Brachydactyly is classified as types A, B, C, D, or E;brachymetatarsus IV;Sugarman brachydactyly;or Kirner deformity. Various types of isolated brachydactyly are rare, except for types A3 and D. We describe a 15-year-old girl with isolated brachyphalangism of the basal finger bones of the little finger with symptoms of tenosynovitis. Tenosynovitis might be caused by growth deviation between the flexor digitorum superficialis and the flexor digitorum profundus. The patient responded very well to surgical treatment.展开更多
目的:探讨在对手指旋转撕脱离断伤断指患者采用显微外科再植治疗的效果。方法:纳入2021年3月至2024年3月间我院收治的手指旋转撕脱离断伤断指患者96例,随机分为对照组和研究组(n=48),分别给予常规残端修整术治疗以及显微外科再植手术治...目的:探讨在对手指旋转撕脱离断伤断指患者采用显微外科再植治疗的效果。方法:纳入2021年3月至2024年3月间我院收治的手指旋转撕脱离断伤断指患者96例,随机分为对照组和研究组(n=48),分别给予常规残端修整术治疗以及显微外科再植手术治疗。治疗后6m对比患者治疗效果,治疗后6m测定两点辨别觉、断指指甲长度等,并采用手指关节总主动活动度(Total active movement,TAM)评估指关节功能,术前、术后1m采用日常生活能力(Activity of daily living,ADL)评分评价患者日常生活能力。结果:治疗后半年研究组患者总有效率为91.67%,相较于对照组的66.67%升高(χ^(2)=9.095,P<0.05);研究组患者临床各项指标恢复程度优于对照组(P<0.05);研究组患者关节功能恢复情况优于对照组(χ^(2)=9.466,P<0.05);治疗后1m两组患者日常生活能力评分均相较于治疗前上升,且研究组相较于对照组上升(P<0.05)。结论:采用显微外科再植治疗可有助于手指断面组织生长,并对远端指尖活动度、关节活动度起到改善作用,并提升日常生活能力。展开更多
基金supported by the Natural National Science Foundation of China(NSFC)(61701076)
文摘We present a systematical study on comparison between water and dry coupling in photoacoustic tomography of the humanfinger joints.Compared to the direct water immersion of thefinger for water coupling,the dry coupling is realized through a transparent PDMSfilm-based water bag,which ensures water-free contact with the skin.The results obtained suggest that the dry cou-pling provides image quality comparable to that by water coupling while eliminating the wrin-kling of thefinger joint caused by the water immersion.In addition,the dry coupling offers more stable hemodynamic images than the water coupling as the water immersion of thefinger joint causes reduction in blood vessel size.
文摘This study was undertaken to determine the bending strength properties of off-cut Yellow Meranti wood by applying the finger jointed techniques. The finger orientations that were used in this study are vertical and horizontal finger orientation. Specimens were bonded with PVAc （polyvinyl acetate）. The bending strength properties were determined by the three point and four point bending test method. The results show that vertical finger orientation has the higher mean of modulus of rupture and the modulus of elasticity value of 24.49 MPa （28.91 MPa） and 8,814 MPa （11,668 MPa） respectively. However, the tested specimen properties did not meet the minimum strength of the solid （control） specimens.
文摘Trauma, osteoarthritis and rheumatoid arthritis can destroy the articulating cartilage in small and large joints, especially in the metacarpo [tarso] phalangeal (MCP/MTP) and phalangeal-phalangeal (PIP) joints. Single piece finger prosthetic designs can reduce pain and correct aesthetic issues, with problems on contemporary designs including decreased stability, lack of fixation and loss of functionality. The examined implants are representative models of currently available total joint replacement (TJR) designs for MCP replacement, such as the Swanson one piece implant. These implants have been shown clinically to have a high failure rate (up to 90%), but the cause of failure is unknown. Compressive studies using a 50 N force and medial-lateral loads of 50 N perpendicular to the longitudinal axis of the arms of the implant were individually applied. Due to material failings, lower values had to be used in some cases. Maximum stress values were found for flexion loading;the Swanson approximation had a peak stress of 8.71 GPa at the interface of the joint arm and the flexion center, Neuflex had 0.188 GPa peak stress at the fixation center of the arm, and in the center of the joint, and the Avanta design had a 5.20 GPa peak stress at the flexion center. The location and concentration of stresses on the models correspond to literature searches for clinical data, showing that the main failure mechanism for these implants is due to primary flexion-extension natural movement of the joint.
文摘Gout is one of the most common inflammatory arthritides that predominantly affects the first metatarsophalangeal joint. The underlying inflammatory process is elicited by the deposition of monosodium urate (MSU) crystals in the affected joint that are termed tophi and which may in the course of chronic gout progress into subcutaneous depositions of tophi. In this case report, we present a patient (PID: 6925981) who was seen in our outpatient department with a first episode of tophaceous gout in the finger, an infrequently seen condition that mostly affects older men with long-term gout. We discuss the case in view of the current literature on diagnosis and treatment of tophaceous gout.
文摘Brachydactyly is a general term that refers to disproportionately short fingers and toes and forms a part of the group of limb malformations characterized by bone dysostosis. Brachydactyly usually occurs either as an isolated malformation or as a part of a complex malformation syndrome. Brachydactyly is classified as types A, B, C, D, or E;brachymetatarsus IV;Sugarman brachydactyly;or Kirner deformity. Various types of isolated brachydactyly are rare, except for types A3 and D. We describe a 15-year-old girl with isolated brachyphalangism of the basal finger bones of the little finger with symptoms of tenosynovitis. Tenosynovitis might be caused by growth deviation between the flexor digitorum superficialis and the flexor digitorum profundus. The patient responded very well to surgical treatment.
文摘目的:探讨在对手指旋转撕脱离断伤断指患者采用显微外科再植治疗的效果。方法:纳入2021年3月至2024年3月间我院收治的手指旋转撕脱离断伤断指患者96例,随机分为对照组和研究组(n=48),分别给予常规残端修整术治疗以及显微外科再植手术治疗。治疗后6m对比患者治疗效果,治疗后6m测定两点辨别觉、断指指甲长度等,并采用手指关节总主动活动度(Total active movement,TAM)评估指关节功能,术前、术后1m采用日常生活能力(Activity of daily living,ADL)评分评价患者日常生活能力。结果:治疗后半年研究组患者总有效率为91.67%,相较于对照组的66.67%升高(χ^(2)=9.095,P<0.05);研究组患者临床各项指标恢复程度优于对照组(P<0.05);研究组患者关节功能恢复情况优于对照组(χ^(2)=9.466,P<0.05);治疗后1m两组患者日常生活能力评分均相较于治疗前上升,且研究组相较于对照组上升(P<0.05)。结论:采用显微外科再植治疗可有助于手指断面组织生长,并对远端指尖活动度、关节活动度起到改善作用,并提升日常生活能力。
