Search results for "Ligature"
showing 10 items of 16 documents
Terminal ligature of inferior thyroid arterhy branches during total thyroidectomy for multinodular goiter is associated with higher postoperative cal…
2010
Purpose: To evaluate the impact of truncal versus terminal branch ligature of the inferior thyroid artery (ITA) on postoperative calcium and PTH plasma levels in patients undergoing total thyroidectomy for multinodular goiter. Methods: A prospective randomized study was performed comparing a group of patients that underwent either truncal ligature of the ITA (group 1) or terminal ligature of ITA branches (group 2). Results: A series of 126 consecutive patients with non-toxic euthyroid multinodular goiter underwent total thyroidectomy. Truncal ligature of the ITA was performed in 63 patients (group 1) and terminal branch ITA ligature in 63 patients (group 2). Postoperative ionized serum calc…
Adrenalectomy for Bilateral and Recurrent Pheochromocytoma: Increased Intraoperative Risk?
2006
Adrenalectomy for pheochromocytoma is per se associated with a specific intraoperative cardiovascular risk caused by catecholamine secretion during manipulation of the tumor. Bilateral or multiple, and recurrent chromaffine tumors are special subentities with a potentially more intensified and longer surgical preparation. The aim of our study was to examine these effects on hemodynamic changes compared with those observed for primary, solitary tumors. Of the 82 studied interventions between February 1992 and May 2005, 58 were seen to involve primary, unilateral tumors, 17 involved bilateral (1 trilateral) findings, and there were 7 cases of recurrency. The hemodynamic changes related to pri…
CARATTERIZZAZIONE DELL’ATTRITO SU COMPONENTI PER APPLICAZIONI ORTODONTICHE MEDIANTE UN SIMULATORE “IN VITRO”
2010
La diffusione delle tecniche a basso attrito (low friction) nell’ambito di terapie ortodontiche per lo spostamento di un dente mediante applicazione di una forza debole (0.5 – 0.7 N) o media (0.7-2.0 N) ha spinto la ricerca del settore odontoiatrico verso lo studio delle forze di attrito nel moto tra archetto ortodontico (archwire) e attacchi ortodontici (brackets). L’esame della letteratura ha mostrato alcuni approcci molto semplificati alla misura dell’attrito, con configurazioni piane, mediante simulazioni poco aderenti a quanto accade nel corso di una reale terapia ortodontica. Il presente lavoro si prefigge uno studio preliminare del fenomeno mediante caratterizzazione della forza di a…
Gesteigerte Expression des Tunnelproteins Connexin43 in der obstruierten Rattenblase - eine mögliche Ursache obstruktionsbedingter Blasenhyperaktivit…
2002
Fragestellung: Blasenhyperaktivitat ist ein haufiges und belastendes Symptom der Blasenauslassobstruktion und persistiert oft auch nach effektiver Deobstruierung. Gap junctions werden schon langer als mogliche Ursache von Blasenhyperaktivitat diskutiert. Wir untersuchten die regionale Verteilung des Gap-junction-Proteins Connexin43 in obstruierten und nicht obstruierten Rattenblasen. Material und Methode: Durch partielle Ligatur der Urethra wurde eine Obstruktion bei weiblichen Ratten erzeugt. Nach 6 Wochen wurden die Blasen entnommen und fur den molekularbiologischen Nachweis von Connexin43-mRNS durch kompetitive RT-PCR oder die immunhistochemische Detektion von Connexin43-Protein weiterve…
The role of Doppler ultrasonography in determining the proper surgical approach to the management of varicocele in children and adolescents
2006
In a study from Italy, colour-Doppler ultrasonography was a reliable diagnostic tool in the preoperative assessment of patients with varicocele. The authors also found that it helped to distinguish those who could be treated laparoscopically from those who should be treated by microsurgical subinguinal ligature. OBJECTIVE To investigate whether colour Doppler ultrasonography (CDUS) is a reliable diagnostic tool for selecting patients with varicocele to undergo either laparoscopy or open microsurgical subinguinal ligation. PATIENTS AND METHODS In a 3-year period, 42 boys affected by left varicocele were evaluated before surgery by inguinal and scrotal CDUS. Using this method it was possible …
Effect of implant placement depth on the peri-implant bone defect configurations in ligature-induced peri-implantitis : an experimental study in dogs
2018
Background The subcrestal placement of implant platform has been considered a key factor in the preservation of crestal bone, but the influence of implant placement depth on bone remodeling combined with peri-implantitis is not fully understood. The aim of this study was to assess the effect of the crestal or subcrestal placement of implants on peri-implant bone defects of ligature-induced peri-implantitis in dogs. Material and Methods Eight weeks after tooth extraction in six beagle dogs, two different types of implants (A: OsseoSpeed™, Astra, Mölndal, Sweden; B: Integra-CP™, Bicon, Boston, USA) were placed at either crestal or subcrestal (-1.5 mm) positions on one side of the mandible. Li…
Gastric control of duodenal electric activity--the function of the gastroduodenal junction.
1975
An investigation was made into the links between electric activity of antral and of duodeno-jejunal musculature in different functional conditions. The function of the gastroduodenal junction in this linking mechanism was analysed. The following observations were made: (a) in the absence of gastric stimulation, the slow electric activities of stomach and duodenum appear to be completely independent; (b) the gastroduodenal junction evidences no electric activity of its own but is affected by that of the two adjacent structures; (c) chemical stimulation of the gastric mucosa causes activation of the electric and mechanical activity of the stomach and analogous activation of duodenal musculatu…
Deep vein thrombus formation induced by flow reduction in mice is determined by venous side branches.
2013
Interaction between vascular wall abnormalities, inflammatory leukocytes, platelets, coagulation factors and hemorheology in the pathogenesis of deep vein thrombosis (DVT) is incompletely understood, requiring well defined animal models of human disease. METHODS AND RESULTS: We subjected male C57BL/6 mice to ligation of the inferior vena cava (IVC) as a flow reduction model to induce DVT. Thrombus size and weight were analyzed macroscopically and sonographically by B-mode, pulse wave (pw) Doppler and power Doppler imaging (PDI) using high frequency ultrasound. Thrombus size varied substantially between individual procedures and mice, irrespective of the flow reduction achieved by the ligatu…
Effects of simultaneous nicotine and alcohol use in periodontitis progression in rats: A histomorphometric study
2013
The aim of this study was to evaluate the effects of alcohol and nicotine, when used alone or simulta - neously, on the alveolar bone loss area resulting from ligature-induced periodontitis in rats. Study design: Forty adult male rats received a cotton ligature in the first lower molar sulcular area, and the animals were randomly assigned to different treatments (n = 10, each group) including daily peritoneal injections of saline solution (group A), submitted to self-administration of alcohol 25% (group B), nicotine solution in concentration 0.19 ?l/ml (group C), and nicotine solution in concentration 0.19 ?l/ml plus self-administration of alcohol 25% (group D). Five weeks later, the animal…
Experimental models of orthodontic tooth movement and their effects on periodontal tissues remodelling.
2021
Made available in DSpace on 2022-04-29T08:31:31Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-10-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Objectives: The present study aimed to compare two different models of orthodontic tooth movement (OTM) in rats by evaluating tooth movement efficiency and periodontal tissues remodelling. Design: Fifteen animals were randomly distributed into 3 groups: control group (untreated); ligature appliance (LA) as experimental OTM using a closed coil spring fixed around maxillary first molar by steel ligature; occlusal appliance (OA) as experimental OTM using a closed coil spring attached on the occlusal surface of the maxillary f…