14 research outputs found
Saphenous nerve block as a diagnosis tool for chronic postsurgical pain of the left medial calf
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An experimental protocol for in situ colorectal liver metastases ablation by radiofrequency toward a standard procedure
No full textExtension of Hepatic Resection Ameliorates Survival in Patients with Type IIIa or IIIb Klatskin Tumors Despite Surgical Complications
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Effects of the radiofrequency interference with modified titanium surgical clips on liver parenchyma -an in vivo experiment
No full textRezumat Efectele interferenåei radiofrecvenåei cu agrafele de titan modificate la nivelul parenchimului hepatic -experiment in vivo Scop: Cercetarea testeazã biocompatibilitatea mai multor tipuri de agrafe de titan la nivelul ficatului în prezenåa radiofrecvenåei, în funcåie de distanåa plasãrii agrafei şi timp. Material aei metodã: Este un studiu experimental pe porc care urmãreaete modificãrile histologice (inflamaåie, necrozã, fibrozã) ce apar la interfaåa dintre agrafele de Ti (modificate prin tratare termicã în vid la temperaturi înalte -1000°C aei 1150°C) şi ficat, în condiåiile prezenåei radiofrecvenåei. Agrafele au fost plasate la nivelul ficatului de porc la distanåa de 0.5 cm, 1,5 cm aei 2,5 cm faåa de sonda de RF. Inflamaåia, necroza şi firboza au fost mãsurate la 7, 14 şi 28 de zile. Rezultate: Alterarea tisularã scade odatã cu creaeterea distanåei la care au fost implantate agrafele. Necroza şi inflamaåia induse de radiofrecvenåã în åesuturile din jurul agrafelor de titan implantate se diminueazã în timp, dar fibroza nu devine mai pronunåatã. Agrafele de titan modificate la 1000°C duc la o necrozã mai puåin pronunåatã decât agrafele de titan nemodificate. Efectele nu se menåin însã pentru inflamaåie sau fibrozã. Tipul de agrafã modereazã efectul distanåei asupra fibrozei şi necrozei. Tipul de agrafã modereazã relaåia timpinflamaåie. Concluzii: Datele obåinute sugereazã cã nu existã un singur tip de agrafe de titan care prezintã o biocompatibilitate net superioarã celorlalte în toate situaåiile. Biocompatibilitatea agrafelor de titan depinde de distanåa la care sunt acestea amplasate: cele netratate mai aproape (sub 1cm faåã de sonda de RF), cele tratate termic mai departe (>1cm). Cuvinte cheie: Agrafe de titan, radiofrecvenåa, inflamaåie, necrozã, fibrozã Abstract Aim: This study sets out to test the biocompatibility of titanium clips in liver, in the presence of radiofrequency. Biocompatibility is assessed at various distances from the RF electrode and different points in time. Method: It is an experimental study conducted on pigs and makes use of histological changes that occur at the livertitanium interface in presence of RF to test hypotheses. The titanium clips were modified in high vacuum (10 -5 atm) by heating them at 1000 °C aei 1150 °C. Titanium clips were placed in liver at 0.5, 1.5 and 2.5 cm from RF probe. At 7, 14 and 28 days the inflammation, necrosis and fibrosis were assessed. Results: The histological alterations decrease with the distance of implantation of titanium clips. The inflammation and necrosis nearby the titanium clips decrease in time, but the fibrosis does not increased, as expected. The modified titanium at 1000°C clips cause less necrosis than commercial titanium clips. The moderator role of clip type between distance and cell alteration is empirically supported only for fibrosis and necrosis. The moderator role between time and cell alteration is supported only for inflammation. surgical clips in all situations. The biocompatibility of the titanium clips depends on the distance from the RF probe. The commercial ones prove less damaging if they are placed close to the RF probe (less than 1 cm) and those that were treated at 1150 C have a better bio-compatibility if placed more than 1 cm from RF probe
Ultrasonographic and Imaging Appearance of Peripheral Intraneural Vascular Anomalies: Report of Two Cases and Review of the Literature.
No full textThe purpose of the paper is to present the ultrasonographic and imaging appearance of two cases of peripheral nerve intraneural vascular anomalies and provide a comprehensive review of the publications on this subject.The clinical presentation, ultrasonographic appearance, corresponding imaging and outcome of a case of ulnar nerve venous malformation and a case of median nerve arteriovenous malformation are presented.Literature search revealed 35 papers presenting 52 cases of vascular anomalies involving the peripheral nerves. The ultrasonographic appearance was described only in ten cases. Our review suggests that peripheral intraneural vascular anomalies are twice more frequent in women. About three quarters of them are located in the upper limb, with the median nerve involved in one third and the ulnar nerved involved in a quarter of all cases. Most of the cases are hemangiomas. Peripheral neural compartment syndromes in patients with coexisting vascular anomalies may prompt for vascular neural involvement, requiring diagnostic imaging studies. Gray-scale and Doppler ultrasound are the methods of first choice, as they provide not only direct visual proof of neural involvement but also contribute to the differential diagnosis between hemangiomas and vascular malformations.</jats:p
