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Tendon transfers

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https://www.readbyqxmd.com/read/29223630/postoperative-loss-of-midline-function-in-brachial-plexus-birth-palsy
#1
Dustin A Greenhill, Arianna Trionfo, Frederick V Ramsey, Scott H Kozin, Dan A Zlotolow
PURPOSE: To identify the rate of and predictive variables for functionally limited shoulder internal rotation in postoperative patients with brachial plexus birth palsy. METHODS: Records of patients with brachial plexus birth palsy who had surgery on the affected upper extremity during a 10-year period were retrospectively reviewed. Patient demographics, physical examinations, and all upper extremity procedures were recorded. Loss of midline function (LOM) was defined as a Modified Mallet Scale or Active Movement Scale (AMS) internal rotation score <3...
December 6, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29219218/rotator-cuff-tendon-assessment-using-magic-angle-insensitive-3d-ultrashort-echo-time-cones-magnetization-transfer-ute-cones-mt-imaging-and-modeling-with-histological-correlation
#2
Yanchun Zhu, Xin Cheng, Yajun Ma, Jonathan H Wong, Yaoqin Xie, Jiang Du, Eric Y Chang
BACKGROUND: Rotator cuff tendons (RCTs) are challenging to image due to the "magic angle effect" and their short T2 . PURPOSE: To assess the degree of magic angle sensitivity of human RCTs and to utilize a 3D ultrashort echo time Cones sequence with magnetization transfer preparation (UTE-Cones-MT) and two-pool quantitative MT modeling with histological correlation. We hypothesized that MT parameters would be less sensitive to the magic angle compared with conventional T2 measurements...
December 8, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29203001/technique-using-the-modified-rolling-hitch-for-split-peroneus-brevis-tendon-transfer-in-lateral-ankle-stabilization
#3
Chih-Kai Hong, Chen-Hao Chiang, Yi-Hung Huang, Wei-Ren Su, Sheng-Pin Lo
We report our technique for split peroneus brevis lateral ankle stabilization using the modified rolling hitch for tendon graft fixation. Applying the modified rolling hitch for tendon grasping in this procedure was useful, and it could decrease the surgical time and avoid the tendon injury caused by the needle.
December 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/29195712/arthrodesis-versus-carpometacarpal-preservation-in-key-grip-procedures-in-tetraplegic-patients-a-comparative-study-of-40-cases
#4
Bertrand Coulet, Thomas Waitzenegger, Jacques Teissier, Cyril Lazerges, Michel Chammas, Charles Fattal, Adeline Cambon-Binder
PURPOSE: Constructing a lateral key pinch (KP) is a universal aim of any functional upper limb surgery program for tetraplegia. Three stages are required: (1) activating the pinch mechanism by flexor pollicis longus tenodesis to the radius or by tendon transfer to the flexor pollicis longus, (2) simplifying the polyarticular chain, and (3) positioning the thumb column. We compared 2 techniques for accomplishing the latter stage, 1 utilizing arthrodesis of the carpometacarpal joint (CMC) and 1 that did not require arthrodesis of the CMC...
November 29, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29192506/extensive-hand-thermal-and-blast-injury-from-electronic-cigarette-explosion-a-case-report
#5
Ellen S Satteson, Nicholas J Walker, Christopher J Tuohy, Joseph A Molnar
BACKGROUND: As the use of electronic cigarettes rises, more reports of injuries related to device explosion are surfacing. METHODS: Presented here is the case of a 35-year-old man sustaining extensive thermal and blast injuries to his hand when the device exploded while he was holding it. He required multiple surgeries involving groin flap coverage, tendon transfer, and nerve grafting to optimize his postinjury function. RESULTS: While much of his hand function has been restored, he has continued deficits in range of motion and sensation as a result of the incident...
November 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/29185830/median-nerve-injury-after-removal-of-subdermal-implantable-contraceptive
#6
Joani M Christensen, Nicholas M Caggiano, Aviram M Giladi, Matthew L Iorio
BACKGROUND: Subdermal implantable contraceptives are highly effective, approved in over 60 countries, and used by millions of women. Due to simple insertion and removal protocols, these procedures are often performed in the outpatient clinic setting, and procedural complications are rare. However, given the location of the implant in the medial antebrachial interval, there is a risk of neurovascular injury, especially with malpositioned or deeply placed implants. METHODS: We present a case of proximal median nerve injury leading to severe neuropathy after attempted removal of a subdermal implantable contraceptive requiring neurolysis and tendon transfers...
November 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/29171303/flexor-hallucis-longus-muscle-and-tendon-transfer-for-the-treatment-of-achilles-tendon-wounds
#7
Michael R Anderson, Derek E Bell, John P Ketz
No abstract text is available yet for this article.
November 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/29166314/step-cut-lengthening-a-technique-for-treatment-of-flexor-pollicis-longus-tendon-rupture
#8
Chew-Wei Chong, Shih-Heng Chen
Reconstruction of a tendon defect is a challenging task in hand surgery. Delayed repair of a ruptured flexor pollicis longus (FPL) tendon is often associated with tendon defect. Primary repair of the tendon is often not possible, particularly after debridement of the unhealthy segment of the tendon. As such, various surgical treatments have been described in the literature, including single-stage tendon grafting, 2-stage tendon grafting, flexor digitorum superficialis tendon transfer from ring finger, and interphalangeal joint arthrodesis...
November 21, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29163120/the-myosuit-bi-articular-anti-gravity-exosuit-that-reduces-hip-extensor-activity-in-sitting-transfers
#9
Kai Schmidt, Jaime E Duarte, Martin Grimmer, Alejandro Sancho-Puchades, Haiqi Wei, Chris S Easthope, Robert Riener
Muscle weakness-which can result from neurological injuries, genetic disorders, or typical aging-can affect a person's mobility and quality of life. For many people with muscle weakness, assistive devices provide the means to regain mobility and independence. These devices range from well-established technology, such as wheelchairs, to newer technologies, such as exoskeletons and exosuits. For assistive devices to be used in everyday life, they must provide assistance across activities of daily living (ADLs) in an unobtrusive manner...
2017: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/29147681/crimped-nanofibrous-biomaterials-mimic-microstructure-and-mechanics-of-native-tissue-and-alter-strain-transfer-to-cells
#10
Spencer E Szczesny, Tristan P Driscoll, Hsiao-Yun Tseng, Pang-Ching Liu, Su-Jin Heo, Robert L Mauck, Pen-Hsiu G Chao
To fully recapitulate tissue microstructure and mechanics, fiber crimping must exist within biomaterials used for tendon/ligament engineering. Existing crimped nanofibrous scaffolds produced via electrospinning are dense materials that prevent cellular infiltration into the scaffold interior. In this study, we used a sacrificial fiber population to increase the scaffold porosity and evaluated the effect on fiber crimping. We found that increasing scaffold porosity increased fiber crimping and ensured that the fibers properly uncrimped as the scaffolds were stretched by minimizing fiber-fiber interactions...
November 13, 2017: ACS Biomaterials Science & Engineering
https://www.readbyqxmd.com/read/29144991/finite-element-simulation-on-posterior-tibial-tendinopathy-load-transfer-alteration-and-implications-to-the-onset-of-pes-planus
#11
Duo Wai-Chi Wong, Yan Wang, Aaron Kam-Lun Leung, Ming Yang, Ming Zhang
BACKGROUND: Posterior tibial tendinopathy is a challenging foot condition resulting in pes planus, which is difficult to diagnose in the early stage. Prior to the deformity, abnormal internal load transfer and soft tissue attenuation are anticipated. The objective of this study was to investigate the internal load transfer and strain of the ligaments with posterior tibial tendinopathy, and the implications to pes planus and other deformities. METHODS: A three-dimensional finite element model of the foot and ankle was reconstructed from magnetic resonance images of a 28-year-old normal female...
November 3, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29132787/distal-biceps-brachii-tendon-transfer-for-re-establishing-extrinsic-finger-function-feasibility-study-in-cadavers
#12
Matthew D Welsch, Alexander D Mih, Brock D Reiter, Gregory A Merrell
PURPOSE: To determine the anatomic feasibility of transferring the biceps brachii tendon into either the extensor digitorum communis (EDC) or flexor digitorum profundus (FDP), determine the excursion imparted to EDC and FDP tendons after transfer, and compare the work capacity of the cadaver biceps to previously published data on the biceps as well as the recipient muscles by calculating the physiologic cross-sectional area (PCSA). METHODS: Four fresh-frozen cadaver shoulder-elbow-wrist specimens were used to measure tendon excursion that can be obtained with transfer of the distal biceps tendon into either the EDC or FDP...
November 11, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29117835/spontaneous-rupture-of-the-extensor-pollicis-longus-with-the-extensor-pollicis-brevis-deformity
#13
Kazuo Ikeda, Naoki Osamura, Kaoru Tada
This paper examines three cases of spontaneous ruptures of the extensor pollicis longus (EPL) with the extensor pollicis brevis (EPB) deformity. The patients ranged from 39 to 71 years old. Non-dominant hands were involved in all three cases. There were no trauma nor pathological cause of EPL ruptures. A tendon transfer using the extensor indicis proprius was performed in each case. Intraoperative findings showed hypoplastic EPB in one case and EPB defects in two cases. A weak or defective EPB puts an excessive load on the EPL, which might be one of the causes of spontaneous EPL rupture...
December 2017: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/29111420/viscoelastic-shear-lag-model-to-predict-the-micromechanical-behavior-of-tendon-under-dynamic-tensile-loading
#14
Jiayu Wu, Hong Yuan, Longyuan Li, Kunjie Fan, Shanguang Qian, Bing Li
Owing to its viscoelastic nature, tendon exhibits stress rate-dependent breaking and stiffness function. A Kelvin-Voigt viscoelastic shear lag model is proposed to illustrate the micromechanical behavior of the tendon under dynamic tensile conditions. Theoretical closed-form expressions are derived to predict the deformation and stress transfer between fibrils and interfibrillar matrix while tendon is dynamically stretched. The results from the analytical solutions demonstrate that how the fibril overlap length and fibril volume fraction affect the stress transfer and mechanical properties of tendon...
October 27, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/29101976/repair-of-pronator-quadratus-with-partial-muscle-split-and-distal-transfer-for-volar-plating-of-distal-radius-fractures
#15
REVIEW
Hui-Kuang Huang, Jung-Pan Wang, Ming-Chau Chang
Flexor tendon injury is a rare, but serious, complication after volar plate fixation for distal radius fractures. The plate position and prominence at the watershed line are contributing factors that cause flexor tendon injury. With the standard volar approach, the pronator quadratus (PQ) is typically elevated off the radial attachment. The distal part of the plate is often visible after repair of the PQ. We describe a "PQ-splitting" technique for covering the distal edge of the plate if primary PQ repair cannot completely cover the distal part of the plate...
November 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29099896/reverse-shoulder-arthroplasty-and-latissimus-dorsi-tendon-transfer
#16
Mihir Sheth, Jia-Wei Kevin Ko, Surena Namdari
In a systematic review, we critically examined and synthesized the results of individual studies on reverse shoulder arthroplasty (RSA) with latissimus dorsi tendon transfer. Two electronic databases were searched. For each included study, 2 reviewers evaluated the quality of its methods and retrieved data. In cases in which outcomes data were similar between studies, data were pooled using frequency-weighted (FW) mean values to generate summary outcomes. Seven studies met the inclusion and exclusion criteria, and 133 patient cases were reviewed...
September 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/29095059/tendon-transfer-surgery-focus-on%C3%A2
#17
Roberto Cuomo, Luca Grimaldi, Giuseppe Nisi, Cesare Brandi, Carlo D'Aniello
Median and Ulnar nerve palsy is a devastating condition that compromise hand function. A procedure of tendon transfer may be helpful to restore the movements by linking palsy muscles to other muscles able to contract. Scientific discoveries and technological innovations have profoundly changed this kind of surgery; studies on sarcomeres, for example, changed the concept of tensioning. To date we know that muscle strength and its contraction capacity depends on many factors (not only tensioning) such as sarcomeres length, cellular cytoskeleton and extracellular matrix composition: all of these factors interact together and in a ways not still fully understood, determining the complex concept of "movement...
November 2, 2017: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/29079740/anatomical-study-of-the-neurovascular-in-flexor-hallucis-longus-tendon-transfers
#18
Haijiao Mao, Wenwei Dong, Zengyuan Shi, Weigang Yin, Dachuan Xu, Keith L Wapner
The transfer of the flexor hallucis longus tendon or flexor digitorum longus tendon is frequently used for the treatment of posterior tibial tendon insufficiency or chronic Achilles tendinopathy. According to several anatomical studies, harvesting the flexor hallucis longus (FHL) tendon may cause nerve injury. Sixty-eight embalmed feet were dissected and anatomically classified to define the relationship between Henry's knot and the plantar nerves. Two different configurations were identified. In Pattern 1, which was observed in 64 specimens (94...
October 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29078829/what-do-you-do-with-the-achilles-if-you-have-no-fancy-toys
#19
REVIEW
Rajiv Shah, Sampat Dumbre Patil
Surgical management of Achilles disorders warrants excision of the degenerated tendon and removal of impinging bone. Resulting defects can be bridged by various methods. Although FHL is the most commonly used tendon for transfer, large defects in cases of chronic Achilles ruptures may be bridged by use of a distant donor tendon. Bony anchorage of a lengthened or transferred tendon into the calcaneus can be done with suture anchors or with interference screws. In developing countries, such implants may not be available or affordable, necessitating the adoption of innovative ways to anchor tendons into the calcaneus...
December 2017: Foot and Ankle Clinics
https://www.readbyqxmd.com/read/29078827/insertional-tendinopathy-of-the-achilles-debridement-primary-repair-and-when-to-augment
#20
REVIEW
Rachel J Shakked, Steven M Raikin
Insertional Achilles tendinopathy is a degenerative enthesopathy associated with pain and dysfunction. Nonsurgical management is first attempted for a period of 3 to 6 months and may consist of physical therapy with eccentric training and other modalities. Surgical treatment can be successful with a variety of approaches. A thorough debridement through a midline tendon-splitting approach is associated with high satisfaction rates. Flexor hallucis longus transfer to augment the repair is considered in older, heavier patients or if more than 50% of the tendon was debrided...
December 2017: Foot and Ankle Clinics
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