The Experts below are selected from a list of 270 Experts worldwide ranked by ideXlab platform
George Kirsh - One of the best experts on this subject based on the ideXlab platform.
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avascular necrosis and fracture of the Capitate Bone unusual scintigraphic features
Clinical Nuclear Medicine, 2000Co-Authors: Robert Mansberg, Guy W Lewis, George KirshAbstract:Often avascular necrosis is diagnosed using three-phase skeletal scintigraphy. A case of avascular necrosis and fracture of the Capitate Bone after trauma is described. Features atypical of fracture were shown on the initial Bone scan.
Frédéric Paycha - One of the best experts on this subject based on the ideXlab platform.
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Occult Capitate fracture through a Bone island – SPECT/CT arthrography imaging
European Journal of Hybrid Imaging, 2018Co-Authors: Klaus Strobel, Lidija Antunovic, Wouter Van Der Bruggen, Gopinath Gnanasegaran, Willm Uwe Kampen, Tim Van Den Wyngaert, Edmond Rust, Torsten Kuwert, Frédéric PaychaAbstract:Background Single photon emission tomography/computed tomography ( SPECT/CT) combines the strengths of Bone scintigraphy and CT and serve as an important alternative to magnetic resonance (MR) imaging in carpal trauma patients if conventional x-rays are equivocal. Case presentation In a young patient with pain 4 days after carpal trauma conventional x-rays were negative for fracture and MR showed only Bone bruise. SPECT/CT arthrography one month later revealed intensive uptake in the Capitate Bone corresponding to a fracture through a Bone island on the CT part of the study. Conclusion SPECT/CT combines the sensitivity of Bone scintigraphy and specificity of (diagnostic) CT and might serve as an important second line imaging modality for the detection of occult carpal fracture.
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Occult Capitate fracture through a Bone island – SPECT/CT arthrography imaging
European Journal of Hybrid Imaging, 2018Co-Authors: Klaus Strobel, Lidija Antunovic, Wouter Van Der Bruggen, Gopinath Gnanasegaran, Willm Uwe Kampen, Tim Van Den Wyngaert, Edmond Rust, Torsten Kuwert, Frédéric PaychaAbstract:Single photon emission tomography/computed tomography (SPECT/CT) combines the strengths of Bone scintigraphy and CT and serve as an important alternative to magnetic resonance (MR) imaging in carpal trauma patients if conventional x-rays are equivocal. In a young patient with pain 4 days after carpal trauma conventional x-rays were negative for fracture and MR showed only Bone bruise. SPECT/CT arthrography one month later revealed intensive uptake in the Capitate Bone corresponding to a fracture through a Bone island on the CT part of the study. SPECT/CT combines the sensitivity of Bone scintigraphy and specificity of (diagnostic) CT and might serve as an important second line imaging modality for the detection of occult carpal fracture.
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occult Capitate fracture through a Bone island spect ct arthrography imaging
European Journal of Hybrid Imaging, 2018Co-Authors: Klaus Strobel, Lidija Antunovic, Wouter Van Der Bruggen, Gopinath Gnanasegaran, Willm Uwe Kampen, Tim Van Den Wyngaert, Edmond Rust, Torsten Kuwert, Frédéric PaychaAbstract:Single photon emission tomography/computed tomography (SPECT/CT) combines the strengths of Bone scintigraphy and CT and serve as an important alternative to magnetic resonance (MR) imaging in carpal trauma patients if conventional x-rays are equivocal. In a young patient with pain 4 days after carpal trauma conventional x-rays were negative for fracture and MR showed only Bone bruise. SPECT/CT arthrography one month later revealed intensive uptake in the Capitate Bone corresponding to a fracture through a Bone island on the CT part of the study. SPECT/CT combines the sensitivity of Bone scintigraphy and specificity of (diagnostic) CT and might serve as an important second line imaging modality for the detection of occult carpal fracture.
U. Pfister - One of the best experts on this subject based on the ideXlab platform.
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“Scapho-Capitate fracture syndrome” an beiden Händen
Der Unfallchirurg, 2003Co-Authors: P. C. Strohm, P. Laier, C. A. Müller, S. Gutorski, U. PfisterAbstract:Das “scapho-Capitate fracture syndrome” ist ein sehr seltenes, aber schweres und komplexes Verletzungsmuster des Carpus.Es wurde erstmals 1956 in der Literatur erwähnt, hier wurden von Fenton [5] 2 Fälle dieser Verletzung beschrieben. Bisher wurden insgesamt 31 Fälle publiziert, ein beidseitiges Auftreten jedoch noch nie. Anhand dieser Kasuistik wollen wir erstmalig das beidseitige Auftreten eines “scaphoCapitate fracture syndrome“ beschreiben und einen kurzen Literaturüberblick geben. The scapho-Capitate fracture syndrome is a rare but severe injury of the carpus. It is characterized by a rotation of the proximal fragment of the Capitate Bone of 90 or 180° and a fracture of the navicular Bone in the intermediate third.This injury is caused by a fall on the outstretched and dorsiflected hand. The scapho-Capitate fracture syndrome was firstly described in 1956 by Fenton.There are 31 cases described in literature but none of these involves both hands.Here we describe the first case of scapho-Capitate fracture syndrome in both hands, in a 21 year old woman who jumped out of a window with suicidal intentions.She was treated operatively by Herbert-screws and K-wires.
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“Scapho-Capitate fracture syndrome” an beiden Händen
Der Unfallchirurg, 2003Co-Authors: P. C. Strohm, P. Laier, C. A. Müller, S. Gutorski, U. PfisterAbstract:The scapho-Capitate fracture syndrome is a rare but severe injury of the carpus. It is characterized by a rotation of the proximal fragment of the Capitate Bone of 90 or 180 degrees and a fracture of the navicular Bone in the intermediate third. This injury is caused by a fall on the outstretched and dorsiflected hand. The scapho-Capitate fracture syndrome was firstly described in 1956 by Fenton. There are 31 cases described in literature but none of these involves both hands. Here we describe the first case of scapho-Capitate fracture syndrome in both hands, in a 21 year old woman who jumped out of a window with suicidal intentions. She was treated operatively by Herbert-screws and K-wires.
Hong-wei Fang - One of the best experts on this subject based on the ideXlab platform.
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Anatomical study of volar pedicled Capitate transposition for treatment of avascular lunate necrosis
Chinese Journal of Hand Surgery, 2012Co-Authors: Yun-zhen Zhao, Shu-qing Yang, Hong-wei FangAbstract:Objective To provide the anatomical basis of transferring volar pedicled partial Capitate Bone to replace lunate Bone with necrosis. Methods The distribution characteristics of nutrient arteries of 100 Capitates were observed.These Capitates were divided into two parts,distal and proximal,to record the quantity and position and measure the caliber of the nutrient arteries.Statistic analyze of the data was conducted.Two casting specimens with Bone and peripheral vascular retention were prepared.The caliber,quantity and position of major nutrient arteries of the Capitate Bone were recorded and measured.Two epipodite specimens with arterial injections of rubber latex were prepared to dissect the dorsal nutrient arteries.Intraosseous blood vessels of the Capitate were observed in 5 specimens on coronal plane sections. Results Both the volar and dorsal aspects of the proximal and distal parts of the Capitate were rich of nutrient vessel entries,with the number of vessel entry slightly higher on the dorsal aspect.The caliber size of the volar vasculature of the Capitate specimens was significantly bigger than that of the dorsal side ( P ＜ 0.01 ).The casting specimens and latex perfusion specimens conformed to the distribution and quantity of nutrient arteries of the Capitate. Conclusion Both the distal and proximal portions of the Capitate Bone are rich of nutrient arteries.Vascular caliber is bigger on the volar side than on the dorsal side.It is anatomically proved that volar pedided proximal Capitate Bone flap transfer is suitable to replacelunate Bone with necrosis.It is a new surgical model for treating Kienbock disease. Key words: Capitate Bone; Kienbock disease; Anatomy,regional
Assaf Kadar - One of the best experts on this subject based on the ideXlab platform.
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the vascular anatomy of the Capitate new discoveries using micro computed tomography imaging
Journal of Hand Surgery (European Volume), 2017Co-Authors: Assaf Kadar, Mohamed Morsy, Alexis Laungani, Osman Akdag, Steven L MoranAbstract:Purpose To study the intraosseous 3-dimensional microvasculature of the Capitate Bone using a novel high-resolution micro-computed tomography (μCT) imaging technology, and to examine the blood supply as it relates to the most common fracture types. Methods Ten cadaveric wrists were injected with a lead-based contrast agent. The Capitates were harvested and imaged using a μCT scanner. The intraosseous vascularity was incorporated into a 3-dimensional image. We measured the vascular pattern as well as the vessels' cross-sectional area, number, and distribution. An average Capitate fracture line was calculated using clinical data from 22 patients with Capitate fractures. The fracture line was projected on the representative Capitate to assess its relation with the nutrient vessels' entry points. Results The Capitate is a well-vascularized carpal supplied by dorsal and volar vascular systems that anastomose in 30% of cases. There was no predominance of one vascular system over the other. Most vessels enter the Capitate at the distal half and supply the proximal pole in a retrograde fashion. In addition, most specimens (70%) also had at least one vessel entering the proximal pole through the volar Capitate ligaments and supplying the proximal pole directly. The average fracture line had an oblique orientation, and 90% of the specimens had a blood vessel entering proximal to that line. Conclusions This μCT vascular study further verifies that the Capitate receives most of its vasculature in a retrograde fashion, but the study also shows that most Capitates have vessels supplying the proximal pole directly. These findings might explain why most Capitate waist fractures do not progress to proximal pole avascular necrosis. Clinical relevance This study characterizes the microvasculature of the Capitate and might shed light on processes involved in Bone healing and the etiology of Capitate avascular necrosis.
