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https://www.readbyqxmd.com/read/28994804/biodegradable-magnesium-stent-treatment-of-saccular-aneurysms-in-a-rat-model-introduction-of-the-surgical-technique
#1
Edin Nevzati, Jeannine Rey, Daniel Coluccia, Donato D'Alonzo, Basil Grüter, Luca Remonda, Javier Fandino, Serge Marbacher
The steady progess in the armamentarium of techniques available for endovascular treatment of intracranial aneurysms requires affordable and reproducable experimental animal models to test novel embolization materials such as stents and flow diverters. The aim of the present project was to design a safe, fast, and standardized surgical technique for stent assisted embolization of saccular aneurysms in a rat animal model. Saccular aneurysms were created from an arterial graft from the descending aorta.The aneurysms were microsurgically transplanted through end-to-side anastomosis to the infrarenal abdominal aorta of a syngenic male Wistar rat weighing >500 g...
October 1, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28984618/reduced-th-expression-and-%C3%AE-synuclein-accumulation-contribute-towards-nigrostriatal-dysfunction-in-experimental-hepatic-encephalopathy
#2
Isabel Suárez, Guillermo Bodega, Miguel Rubio, Benjamín Fernández
PURPOSE: The present work examines α-synuclein expression in the nigrostriatal system of a rat chronic hepatic encephalopathy model induced by portacaval anastomosis (PCA). There is evidence that dopaminergic dysfunction in disease conditions is strongly associated with such expression. Possible relationships among dopaminergic neurons, astroglial cells and α-synuclein expression were sought. METHODS: Brain tissue samples from rats at 1 and 6 months post-PCA, and controls, were analysed immunohistochemically using antibodies against tyrosine hydroxylase (TH), α-synuclein, glial fibrillary acidic protein (GFAP) and ubiquitin (Ub)...
2017: Restorative Neurology and Neuroscience
https://www.readbyqxmd.com/read/28952820/a-novel-laparoscopic-surgery-model-with-a-device-to-expand-the-abdominal-working-space-in-rats-the-influence-of-pneumoperitoneum-and-skin-incision-length-on-postoperative-inflammatory-cytokines
#3
Naruhiko Murase, Takahisa Tainaka, Hiroo Uchida, Akinari Hinoki, Chiyoe Shirota, Kazuki Yokota, Kazuo Oshima, Ryo Shirotsuki, Kosuke Chiba, Yujiro Tanaka
PURPOSE: Experimental models of laparoscopic surgery generally use large animals owing to a sufficient abdominal working space. We developed a novel laparoscopic surgery model in rats. We performed intestinal anastomosis to demonstrate the feasibility and reliability of this model. MATERIALS AND METHODS: We designed a device for rats that expanded the abdominal working space and allowed us to manipulate the intraperitoneal organs by hand under direct vision with pneumoperitoneum...
September 27, 2017: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/28923652/orthotopic-kidney-transplantation-in-the-rat-with-the-use-of-a-sleeve-arterial-anastomosis-method-and-a-modified-stenting-technique-for-renal-veins
#4
Z-D Jin, L-N Xue, L-S Peng
BACKGROUND: We describe a simple and reliable orthotopic kidney transplantation method in rats with the use of sleeve arterial anastomosis and a modified stenting technique for anastomosis of the renal vein (RV). METHODS: Male Fischer and Lewis rats were used as kidney donors and recipients, respectively, and their left kidneys were harvested in situ. In the control rats (n = 30), the renal artery (RA) and RV anastomoses were performed end-to-end with interrupted sutures by means of the conventional technique...
October 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28902940/bacterial-translocation-and-mortality-on-rat-model-of-intestinal-ischemia-and-obstruction
#5
Rafael Izar Domingues da Costa, Roberto Rasslan, Marcia Kiyomi Koike, Edivaldo Massazo Utiyama, Edna Frasson de Souza Montero
Purpose: To develop an experimental model of intestinal ischemia and obstruction followed by surgical resection of the damaged segment and reestablishment of intestinal transit, looking at bacterial translocation and survival. Methods: After anesthesia, Wistar rats was subject to laparotomy, intestinal ischemia and obstruction through an ileal ligature 1.5cm of ileum cecal valve; and the mesenteric vessels that irrigate upstream of the obstruction site to approximately 7 to 10 cm were ligated...
August 2017: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/28894657/optimization-of-an-arterialized-venous-fasciocutaneous-flap-in-the-abdomen-of-the-rat
#6
Diogo Casal, Eduarda Mota-Silva, Diogo Pais, Inês Iria, Paula A Videira, David Tanganho, Sara Alves, Luís Mascarenhas-Lemos, José Martins Ferreira, Mário Ferraz-Oliveira, Valentina Vassilenko, João Goyri O'Neill
BACKGROUND: Although numerous experimental models of arterialized venous flaps (AVFs) have been proposed, no single model has gained widespread acceptance. The main aim of this work was to evaluate the survival area of AVFs produced with different vascular constructs in the abdomen of the rat. METHODS: Fifty-three male rats were divided into 4 groups. In group I (n = 12), a 5-cm-long and 3-cm-wide conventional epigastric flap was raised on the left side of the abdomen...
August 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28883693/effects-of-albumin-glutaraldehyde-glue-on-healing-of-colonic-anastomosis-in-rats
#7
Kalliopi Despoudi, Ioannis Mantzoros, Orestis Ioannidis, Aggeliki Cheva, Nikolaos Antoniou, Dimitrios Konstantaras, Savvas Symeonidis, Manousos George Pramateftakis, Efstathios Kotidis, Stamatis Angelopoulos, Konstantinos Tsalis
AIM: To evaluate the effect of local surgical adhesive glue (albumin/glutaraldehyde-Bioglue) on the healing of colonic anastomoses in rats. METHODS: Forty Albino-Wistar male rats were randomly divided into two groups, with two subgroups of ten animals each. In the control group, an end-to-end colonic anastomosis was performed after segmental resection. In the Bioglue group, the anastomosis was protected with extraluminar application of adhesive glue containing albumin and glutaraldehyde...
August 21, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28880048/histopathological-changes-associated-to-an-absorbable-fibrin-patch-tachosil%C3%A2-covering-in-an-experimental-model-of-high-risk-colonic-anastomoses
#8
C García-Vásquez, S Gómez García de Las Heras, C Pastor Idoate, D De Pablo, M J Fernández-Aceñero
BACKGROUND: TachoSil® is a fibrin sponge that contains fibrinogen and thrombin and is a useful adjuvant to enhance control of air leaks in thoracic surgery and to control bleeding in vascular and general surgery. Its use in intestinal surgery to prevent suture dehiscence is currently under investigation. MATERIAL AND METHODS: We report the results of a prospective randomized experimental study on 33 large white pigs in which a high-risk suture was created by induction of ischemia...
September 7, 2017: Histology and Histopathology
https://www.readbyqxmd.com/read/28867319/transfer-of-learning-from-practicing-microvascular-anastomosis-on-silastic-tubes-to-rat-s-abdominal-aorta
#9
Pooneh Mokhtari, Ali Tayebi Meybodi, Michael T Lawton, Andre Payman, Arnau Benet
OBJECT: Learning to perform microvascular anastomosis is difficult. Laboratory practice models using artificial vessels are frequently used for this purpose. However, the efficacy of such practice models has not been objectively assessed on the performance of microvascular anastomosis during live surgical settings. This study was carried out to assess the transfer of learning from practicing microvascular anastomosis on tubes to anastomosing rat's abdominal aorta. METHODS: Ten surgeons without any experience in microvascular anastomosis were randomly assigned to an experimental or a control group...
August 31, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28854521/substitution-rate-based-screening-model-to-assess-stenosis-progression-in-experimental-stenotic-arteriovenous-grafts
#10
Chung-Dann Kan, Wei-Ling Chen, Chia-Hung Lin, Ming-Jui Wu, Yi-Chen Mai
An arteriovenous graft (AVG) has a higher patency rate in stenosis progression at the venous anastomosis site, which causes coexisting inflow and outflow stenoses. This leads to increases in blood pressure, flow velocity, and flow resistance, resulting in hemodialysis (HD) vascular access dysfunction from early clots and thrombosis to the progression of coexisting stenoses. To prevent vascular access complications such as inflow or outflow stenoses, this study proposes a novel examination method in an experimental AVG system using a substitution-rate based screening model...
August 15, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/28804554/effect-of-omiganan-on-colonic-anastomosis-healing-in-a-rat-model-of-peritonitis
#11
Teresa Lorenzi, Maria Michela Cappelletti Trombettoni, Roberto Ghiselli, Francesca Paolinelli, Rosaria Gesuita, Oscar Cirioni, Mauro Provinciali, Wojciech Kamysz, Elzbieta Kamysz, Cristiano Piangatelli, Mario Castellucci Md, Mario Guerrieri, Manrico Morroni
BACKGROUND: This study investigates the effects of the antimicrobial cationic peptide omiganan-alone and combined with the antibiotic imipenem-on colonic anastomosis healing in presence of intraperitoneal sepsis induced in a rodent model of cecal ligation and puncture (CLP). METHODS: Forty male Wistar rats were divided into 5 groups of 8 animals. Group 1 (control group) underwent laparotomy and cecal mobilization and the next day received left colon anastomosis...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28796579/effects-of-localized-x-ray-irradiation-on-peripheral-nerve-regeneration-in-transected-sciatic-nerve-in-rats
#12
Bo Jiang, Yong Zhang, Jiaju Zhao, Chang She, Xiaozhong Zhou, Qirong Dong, Peiji Wang
Low-dose radiation has been used in clinical and experimental models for the prevention of scarring and for fracture healing. There is evidence that low-dose radiation improves the hormesis of various cell types but little is known about its effects on peripheral nerve tissue. In this study, we investigated the beneficial effects of low-dose radiation on the regeneration of transectional peripheral nerve injury in an experimental rat model. Seventy-two male Sprague-Dawley rats received transection injury to the left sciatic nerves, and the nerves were subsequently sutured by epineurium end-to-end anastomosis to restore continuity...
October 2017: Radiation Research
https://www.readbyqxmd.com/read/28759319/an-experimental-lymphedema-animal-model-for-assessing-the-results-of-lymphovenous-anastomosis
#13
Randolfo Fernández Peñuela, Gemma Pons Playa, Laura Casaní Arazo, Jaume Masiá Ayala
BACKGROUND: The lymphatic system is the least studied of the body's systems, and as a result its contribution to human health and diseases is not well known. The failure of the lymphatic system to drain extravasated fluid efficiently leads to accumulation of lymph in the interstitial tissue, thus causing lymphedema. Despite developments in microsurgery procedures, the results of lymphedema treatment remain disappointing. The aim of this study was to develop an experimental animal model that is able to reproduce the disease and to apply various surgical and therapeutic approaches...
July 31, 2017: Lymphatic Research and Biology
https://www.readbyqxmd.com/read/28755096/analysis-of-the-hemostatic-potential-of-modern-topical-sealants-on-arterial-and-venous-anastomoses-an-experimental-porcine-study
#14
Hamidreza Fonouni, Arash Kashfi, Ali Majlesara, Oliver Stahlheber, Lukas Konstantinidis, Thomas W Kraus, Arianeb Mehrabi, Hani Oweira
One of the widely accepted adjunctive agents in the variety of surgical modalities are sealants. Our study aim was to compare four commonly used modern sealants in a standardized experimental setting to assess their feasibility, and hemostatic efficacy in vascular anastomosis. Forty landrace pigs (weight: 24.7 ± 3.8 kg) were randomized into the control (n = 8) and four sealant groups; TachoSil® (n = 8), Tissucol Duo® (n = 8), Coseal® (n = 8), and FloSeal® (n = 8). After doing a portal vein end-to-end anastomosis as well as stitches of aortic incision, the sealants were applied on anastomotic site...
September 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28709930/particle-image-velocimetry-study-of-the-celiac-trunk-hemodynamic-induced-by-continuous-flow-left-ventricular-assist-device
#15
Francesco Scardulla, Diego Bellavia, Leonardo D'Acquisto, Giuseppe M Raffa, Salvatore Pasta
Whereas left ventricular assist device (LVAD) is the gold-standard therapy for patients with heart failure, gastrointestinal bleeding is one of the most common complications. LVAD implantation may remarkably impact aortic hemodynamics so that experimental and computational flow analyses can be used to study the disease mechanisms. Here we present an experimentally-calibrated computational model of the celiac trunk hemodynamic of a LVAD-supported patient who experienced bleeding after device implantation. Specifically, both particle image velocimetry (PIV) and echocardiography were used to measure and compare flow distributions in each branch of a phantom model of the patient abdominal aorta...
July 12, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28700005/fluorescent-test-accurately-predicts-leak-of-ischemic-colon-anastomosis-in-rats
#16
Laura Moschetti, Tiago Leal Ghezzi, Belisa Gomes Müller, Adriano Basso Dias, Oly Campos Corleta
Purpose: To investigate if fluorescein fluorescent test can predict dehiscence in a model of ischemic colonic anastomosis in rats. Methods: This experimental controlled trial randomly assigned 55 rats to four groups. Anastomoses were performed in non-ischemic colon segments (control group) and in ischemic colon segments measuring 1, 2 or 3 cm long (groups 1, 2 and 3, respectively). Fluorescein was injected and the tissues were examined under ultraviolet light. Seven days later, a second-look surgery was performed to check for the presence or absence of anastomosis dehiscence...
June 2017: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/28689390/usefulness-of-end-to-side-bridging-anastomosis-of-sural-nerve-to-tibial-nerve-an-experimental-research
#17
Soner Civi, Emre Durdag, Murat Hamit Aytar, Ozgur Kardes, Figen Kaymaz, Sukru Aykol
OBJECTIVE: Repair of sensorial nerve defect is an important issue on peripheric nerve surgery. The aim of the present study was to determine the effects of sensory-motor nerve bridging on the denervated dermatomal area, in rats with sensory nerve defects, using a neural cell adhesion molecule (NCAM). METHODS: We compared the efficacy of end-to-side (ETS) coaptation of the tibial nerve for sural nerve defect repair, in 32 Sprague-Dawley rats. Rats were assigned to 1 of 4 groups: group A was the sham operated group, group B rats had sural nerves sectioned and buried in neighboring muscles, group C experienced nerve sectioning and end-to-end (ETE) anastomosis, and group D had sural nerves sectioned and ETS anastomosis was performed using atibial nerve bridge...
July 2017: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/28688571/local-effects-of-epidermal-growth-factor-on-the-wound-healing-in-esophageal-anastomosis-an-experimental-study
#18
Ayşe Bülbül Adam, Mustafa Yaşar Özdamar, Hacı Hasan Esen, Engin Günel
OBJECTIVE: In this study with the experimental model of primary repair of esophageal atresia(EA), we investigated the effects of the epidermal growth factor(EGF) on wound healing in the anastomosis of EA. MATERIALS AND METHODS: Forty rabbits that were performed a resection of a 1-cm segment of the cervical esophagus followed by the end-to-end anastomosis were divided into four groups. Group I (7-day group) and III (21-day group), the control groups, had no EGF applied to the anastomosis...
August 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28648580/flowmetry-evolution-in-microvascular-surgery-a-systematic-review
#19
REVIEW
Georgios Pafitanis, Maria Raveendran, Simon Myers, Ali M Ghanem
This review aims to provide a summary of the flowmeter devices used in microvascular surgery and assesses their contribution to improving the clinical outcomes of free tissue transfer. Flowmeters are widely accepted as the standard method of intraoperative assessment of the patency of coronary vascular anastomoses, providing thresholds that predict outcome. There is limited evidence regarding the use of flow measurements in plastic surgery microvascular anastomoses; however, flowmetry appears to have some role in postoperative free flap monitoring and prevention of complications...
September 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28634703/isoperistaltic-versus-antiperistaltic-side-to-side-anastomosis-after-right-laparoscopic-hemicolectomy-for-cancer-isovanti-trial-study-protocol-for-a-randomised-clinical-trial
#20
N Ibañez, J Abrisqueta, J Luján, Q Hernández, P Parrilla
BACKGROUND: It is believed that loosing ileocecal valve is well tolerated in patients who do not have short bowel syndrome or Crohn disease. From the hypothesis of colonic peristalsis and transit is regulated by that ileocecal valvular mechanism, we try to find out if the creation of a new pseudo-valvular mechanism as antiperistaltic anastomosis could be considered after right hemicolectomy can cause any short- or long-term changes in gastrointestinal habits. PURPOSE: The purpose of the study at primary endpoint is to compare early (occurring within 30 days of surgery) and late (occurring during the follow-up) postoperative complications between both groups The purpose of the study at secondary endpoint is to compare intraoperative and postoperative events between experimental and control groups in terms of operating time, first oral tolerance day, first flatus and faeces, length of hospital stay and orocecal transit; comparing rates of gastrointestinal life quality and comparing mortality rates between both groups...
June 21, 2017: International Journal of Colorectal Disease
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