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Vascular reconstruction

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https://www.readbyqxmd.com/read/27914772/vascular-reconstruction-after-retroperitoneal-and-lower-extremity-sarcoma-resection
#1
M Wortmann, I Alldinger, D Böckler, A Ulrich, A Hyhlik-Dürr
PURPOSE: Soft tissue sarcomas (STS) of the retroperitoneum and the lower limb with invasion of major blood vessels are very rare malignancies. This study analyses the outcome of patients with vascular replacement during resection of STS of the retroperitoneum and the lower extremity with either arterial or concomitant arterial and venous infiltration. METHODS: Patients with vascular replacement during resection of sarcoma of the retroperitoneum and the lower extremity between 1990 and 2014 were included in this retrospective single center study...
November 20, 2016: European Journal of Surgical Oncology
https://www.readbyqxmd.com/read/27913913/improved-image-quality-in-abdominal-ct-in-patients-who-underwent-treatment-for-hepatocellular-carcinoma-with-small-metal-implants-using-a-raw-data-based-metal-artifact-reduction-algorithm
#2
Keitaro Sofue, Takeshi Yoshikawa, Yoshiharu Ohno, Noriyuki Negi, Hiroyasu Inokawa, Naoki Sugihara, Kazuro Sugimura
OBJECTIVES: To determine the value of a raw data-based metal artifact reduction (SEMAR) algorithm for image quality improvement in abdominal CT for patients with small metal implants. METHODS: Fifty-eight patients with small metal implants (3-15 mm in size) who underwent treatment for hepatocellular carcinoma were imaged with CT. CT data were reconstructed by filtered back projection with and without SEMAR algorithm in axial and coronal planes. To evaluate metal artefact reduction, mean CT number (HU and SD) and artefact index (AI) values within the liver were calculated...
December 2, 2016: European Radiology
https://www.readbyqxmd.com/read/27913755/applications-of-three-dimensional-printing-in-surgery
#3
REVIEW
Chi Li, Tsz Fung Cheung, Vei Chen Fan, Kin Man Sin, Chrisity Wai Yan Wong, Gilberto Ka Kit Leung
Three-dimensional (3D) printing is a rapidly advancing technology in the field of surgery. This article reviews its contemporary applications in 3 aspects of surgery, namely, surgical planning, implants and prostheses, and education and training. Three-dimensional printing technology can contribute to surgical planning by depicting precise personalized anatomy and thus a potential improvement in surgical outcome. For implants and prosthesis, the technology might overcome the limitations of conventional methods such as visual discrepancy from the recipient's body and unmatching anatomy...
December 2, 2016: Surgical Innovation
https://www.readbyqxmd.com/read/27913424/digital-3d-reconstructions-using-histological-serial-sections-of-lung-tissue-including-the-alveolar-capillary-network
#4
Roman Grothausmann, Lars Knudsen, Matthias Ochs, Christian Mühlfeld
The alveolar capillary network (ACN) provides an enormously large surface area that is necessary for pulmonary gas exchange. Changes of the ACN during normal or pathological development or in pulmonary diseases are of great functional impact and warrant further analysis. Due to the complexity of the three-dimensional (3D) architecture of the ACN, 2D approaches are limited in providing a comprehensive impression of the characteristics of the normal ACN or the nature of its alterations. Stereological methods offer a quantitative way to assess the ACN in 3D in terms of capillary volume, surface area or number but lack a 3D visualization to interpret the data...
December 2, 2016: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/27913222/human-liver-regeneration-in-advanced-cirrhosis-is-organized-by-the-portal-tree
#5
Katalin Dezső, András Rókusz, Edina Bugyik, Armanda Szücs, András Szuák, Bence Dorogi, Mátyás Kiss, Ágnes Nemeskéri, Péter Nagy, Sándor Paku
BACKGROUND&AIMS: In advanced cirrhosis new hepatocytic nodules are generated by budding of ductules in areas of parenchymal extinction. However, the vascular alterations in the areas of parenchymal extinction, the blood supply and the structure of the new hepatocytic nodules have not been analyzed in detail. METHODS: Explanted human cirrhotic livers of three different etiologies and two experimental models of cirrhosis in rats were examined thoroughly. 3D reconstruction of the immunohistochemically stained serial sections and casting of human and experimental cirrhotic livers have been used to reveal the structural organization of the regenerative buds...
November 29, 2016: Journal of Hepatology
https://www.readbyqxmd.com/read/27909288/reconstruction-of-isolated-inferior-right-hepatic-vein-s-in-right-lobe-living-donor-liver-transplantation-using-polytetrafluoroethylene-grafts-a-new-feasible-concept-technique-of-bridging-conduit-venoplasty-and-outcomes
#6
Ashok Thorat, Shih-Chao Hsu, Horng-Ren Yang, Ping-Chun Li, Ming-Li Li, Chun-Chieh Yeh, Te-Hung Chen, Kin-Shing Poon, Long-Bin Jeng
BACKGROUND Right lobe living donor liver transplantation (LDLT) remains the most common form of liver transplantation in Asia. However, reconstruction of the venous outflow in a right liver allograft may pose technical difficulties if hepatic venous variations are present. Recently, much emphasis has been given to the reconstruction of large and multiple inferior right hepatic veins (IRHVs). The method of reconstructive technique, type of vascular grafts, and the outcome after the procedure have been a point of debate...
December 2, 2016: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/27908375/treatment-of-radiation-induced-urethral-strictures
#7
REVIEW
Matthias D Hofer, Joceline S Liu, Allen F Morey
Radiation therapy may result in urethral strictures from vascular damage. Most radiation-induced urethral strictures occur in the bulbomembranous junction, and urinary incontinence may result as a consequence of treatment. Radiation therapy may compromise reconstruction due to poor tissue healing and radionecrosis. Excision and primary anastomosis is the preferred urethroplasty technique for radiation-induced urethral stricture. Principles of posterior urethroplasty for trauma may be applied to the treatment of radiation-induced urethral strictures...
February 2017: Urologic Clinics of North America
https://www.readbyqxmd.com/read/27904225/the-inferior-medial-genicular-artery-and-its-vascularization-of-the-pes-anserinus-superficialis-a-cadaveric-study
#8
Lena Hirtler, Manuel Ederer, Mike Faber, Patrick Weninger
BACKGROUND: A common method for reconstruction of the anterior cruciate ligament (ACL) is it's replacement by a free avascular graft, using the gracilis and/or semitendinosus tendons. These grafts pass a vulnerable phase in the ligamentization-process during the 1(st) year after reconstruction. The aims of this study were first to evaluate the vascularization of the pes anserinus superficialis (PAS) by the inferior medial genicular artery (IMGA) and second to develop a pedunculated surgical technique for ACL reconstruction, to preserve a maximal amount of natural vascularization of the tendons inserting at the PAS...
November 2016: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/27900711/lacertus-fibrosus-augmentation-for-distal-biceps-brachii-rupture-repair-surgical-technique
#9
M Fontana, A Trimarchi, A Colozza
BACKGROUND: Repair of distal biceps tendon ruptures has become widely accepted. Unfortunately, care of retracted-degenerated injuries remains a challenge for orthopedic surgeons. Complication rates appear to increase when surgery is performed in chronic cases compared to those operated acutely. Multiple techniques for chronic reconstruction with the use of grafts have been described. Recently Morrey, from the Mayo Clinic, proposed a direct anatomic repair of retracted distal biceps tendon ruptures in extreme flexion (60°-90°) to avoid grafting...
December 2016: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/27900349/symptomatic-bilateral-coronary-artery-fistula-to-pulmonary-artery-in-elderly-patient
#10
Francisco Pereira da Silva, Paulo Donato, Henrique Donato, Elisabete Jorge, Maria Joao Ferreira, Filipe Caseiro-Alves
We report the imaging findings of an uncommon coronary vascular termination anomaly, with fistula to the pulmonary artery. This 70 year old female patient presented unstable angina, showing a coronary artery fistula depicted in coronary angiogram from the left coronary to the pulmonary artery, with no significant atherosclerotic pathology. Due to development of ventricular tachycardia in stress echocardiogram examination, she was proposed for coronary fistula closure. Coronary CT was performed for procedure planning and allowed the identification of a second unsuspected fistula from the right coronary to the right pulmonary artery...
2016: European Journal of Radiology Open
https://www.readbyqxmd.com/read/27900098/clinical-effects-of-three-surgical-approaches-for-a-giant-cell-tumor-of-the-distal-radius-and-ulna
#11
Jing Zhang, Yi Li, Dongqi Li, Junfeng Xia, Su Li, Shunling Yu, Yedan Liao, Xiaojuan Li, Huilin Li, Zuozhang Yang
The aim of the present study was to assess the curative effects of three surgical approaches for a giant cell tumor (GCT) of the distal radius and ulna. A total of 27 patients with GCT on distal radius and ulnas (7 and 20, respectively), confirmed by biopsy, were treated with individualized treatment regimens, according to the Campanacci's grade system: i) Curettage plus inactivated tumor bed and allogeneic bone graft/bone cement augmentation for Campanacci's grade I GCT of the distal radius and ulna (Group A); ii) simple en bloc resection for Campanacci's grade II and III GCT of the distal ulna (Group B); iii) en bloc resection and reconstruction with non-vascularized fibular autograft/allogeneic bone graft for Campanacci's II and III GCT of the distal radius (Group C)...
November 2016: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/27896655/transhepatic-hilar-approach-for-perihilar-cholangiocarcinoma-significance-of-early-judgment-of-resectability-and-safe-vascular-reconstruction
#12
Naohisa Kuriyama, Shuji Isaji, Akihiro Tanemura, Yusuke Iizawa, Hiroyuki Kato, Yasuhiro Murata, Yoshinori Azumi, Masashi Kishiwada, Shugo Mizuno, Masanobu Usui, Hiroyuki Sakurai
In the most common surgical procedure for perihilar cholangiocarcinoma, the margin status of the proximal bile duct is determined at the final step. Our procedure, the transhepatic hilar approach, confirms a cancer-negative margin status of the proximal bile duct first. We first performed a partial hepatic parenchymal transection to expose the hilar plate, and then transected the proximal bile duct to confirm margin status. Then, divisions of the hepatic artery and portal vein of the future resected liver are performed, followed by the residual hepatic parenchymal transection...
November 28, 2016: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/27896183/the-trapezius-muscle-flap-a-viable-alternative-for-posterior-scalp-and-neck-reconstruction
#13
Hee Jun Yang, Dong Hun Lee, Yang Woo Kim, Sang Gu Lee, Young Woo Cheon
BACKGROUND: The trapezius muscle flap is not usually the first reconstructive option for skin and soft tissue defects in the posterior neck and scalp due to surgeons' unfamiliarity with the surgical anatomy and developments in free tissue transfer techniques. The goals of this study were to describe the clinical use of trapezius flaps in posterior neck and scalp reconstruction, and to investigate the vascular anatomy of trapezius flaps in Asians in order to obtain information facilitating the safe design and elevation of flaps in which most of the muscle is preserved...
November 2016: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/27895379/functional-outcomes-after-successful-lower-extremity-arterial-injuries-repair
#14
Ziad Sophie, Lekhraj Mal
The study was conducted to measure functional outcome of patients who had successful lower extremity arterial reconstruction after vascular injury at a tertiary care centre in Karachi over 5 years from January 2008 to December 2013. In this descriptive cohort study, the functional outcomes were assessed with lower extremity functional scale (LEFS). The mean age the 75 patients in the study was 32±11 years. Limb salvage was successful in 72(96%) cases. The most common injured artery was superficial femoral artery 30(40%) followed by popliteal artery 19(25%)...
October 2016: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/27894916/reliability-of-extended-dorsal-intercostal-artery-perforator-propeller-flaps-for-reconstruction-of-large-myelomeningocele-defects
#15
Goktekin Tenekeci, Yavuz Basterzi
Reconstruction of large myelomeningocele defects using extended (elongated beyond the lateral margin of the latissimus dorsi muscle) dorsal intercostal artery perforator (DICAP) propeller flaps is not recommended by previous studies. However, to provide tension-free and successful closure of a defect, the DICAP propeller flaps must sometimes be elongated beyond this margin. Our experience and results in this issue are discussed. In this article, reconstruction of 11 consecutive cases, with large myelomeningocele defects in which standard DICAP propeller flaps were incapable to close the defect, was achieved using extended DICAP propeller flaps between June 2013 and November 2015...
November 15, 2016: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/27894581/pre-expanded-super-thin-skin-perforator-flaps
#16
REVIEW
Chunmei Wang, Sifen Yang, Lee L Q Pu
Patients with severe postburn scar contractures underwent reconstruction of skin defects after scar excision with pre-expanded super-thin skin perforator flaps supplied primarily by perforators via the "bridging effect" from the branches of the adjacent arteries as 2-stage procedures. Pre-expansion is an innovative technique and may improve the anastomoses between subdermal vascular plexuses and extend the supplying area of these vessels to the flap. Such a flap becomes super thin, but with a prefabricated blood supply it can be used for reconstruction of skin defects of the face, neck, or other body part with improved functional and cosmetic outcomes...
January 2017: Clinics in Plastic Surgery
https://www.readbyqxmd.com/read/27894575/pre-expanded-free-perforator-flaps
#17
REVIEW
Emre Hocaoğlu
Pre-expanded perforator flaps are the most recent technical way to shape tissue for exact needs. Reconstruction with pre-expanded free perforator flaps has proven successful in terms of obtaining more extensive, more pliable, and thinner flaps that have increased vascularity, and also causing less donor site morbidity. In this article the author's experience with the clinical application of such flaps and the relevant published literature are reviewed.
January 2017: Clinics in Plastic Surgery
https://www.readbyqxmd.com/read/27892493/autologous-temporomandibular-joint-reconstruction-independent-of-exogenous-additives-a-proof-of-concept-study-for-guided-self-generation
#18
Jiao Wei, Tanja Herrler, Dong Han, Kai Liu, Rulin Huang, Markus Guba, Chuanchang Dai, Qingfeng Li
Joint defects are complex and difficult to reconstruct. By exploiting the body's own regenerative capacity, we aimed to individually generate anatomically precise neo-tissue constructs for autologous joint reconstruction without using any exogenous additives. In a goat model, CT scans of the mandibular condyle including articular surface and a large portion of the ascending ramus were processed using computer-aided design and manufacturing. A corresponding hydroxylapatite negative mold was printed in 3D and temporarily embedded into the transition zone of costal periosteum and perichondrium...
November 28, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27892447/a-study-on-variations-of-nutrient-foramen-of-humerus-with-its-clinical-implications
#19
D I Mansur, P Manandhar, M K Haque, D K Mehta, S Duwal, B Timalsina
Background Nutrient foramen is an opening into shaft of humerus which gives passage to the blood vessels of medullary cavity. The knowledge of nutrient foramen is important in surgical procedures like bone grafting and more recently in microsurgical vascularized bone transplantation. Objective To determine the number, location and direction of nutrient foramen and whether the nutrient foramens obey the rule of ossification, that is directed away from the growing end of the bone or not. Method The present study consisted of 253 (108 right and 145 left) dried humeri excluding any fracture or pathological abnormalities during the period of 15th December 2014 - 14th February 2015...
January 2016: Kathmandu University Medical Journal (KUMJ)
https://www.readbyqxmd.com/read/27891264/world-s-first-clinical-case-of-gene-activated-bone-substitute-application
#20
I Y Bozo, R V Deev, A Y Drobyshev, A A Isaev, I I Eremin
Treatment of patients with large bone defects is a complex clinical problem. We have initiated the first clinical study of a gene-activated bone substitute composed of the collagen-hydroxyapatite scaffold and plasmid DNA encoding vascular endothelial growth factor. The first patient with two nonunions of previously reconstructed mandible was enrolled into the study. Scar tissues were excised; bone defects (5-14 mm) between the mandibular fragments and nonvascularized rib-bone autograft were filled in with the gene-activated bone substitute...
2016: Case Reports in Dentistry
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