Histoacryl
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To determine whether PHEMA [poly(2-hydroxyethylmethacrylate)] is suitable for portal vein embolization in patients scheduled to right hepatectomy and whether it is as effective as the currently used agent (a histoacryl/lipiodol mixture). Two groups of nine patients each scheduled for extended right hepatectomy for primary or secondary hepatic tumor, had right portal vein embolization in an effort to induce future liver remnant (FLR) hypertrophy. One group had embolization with PHEMA, the other one with the histoacryl/lipiodol mixture. In all patients, embolization was performed using the right retrograde transhepatic access. Embolization was technically successful in all 18 patients, with no complication related to the embolization agent. Eight patients of either group developed FLR hypertrophy allowing extended right hepatectomy. Likewise, one patient in each group had recanalization of a portal vein branch. Histology showed that both embolization agents reach the periphery of portal vein branches, with PHEMA penetrating somewhat deeper into the periphery. PHEMA has been shown to be an agent suitable for embolization in the portal venous system comparable with existing embolization agent (histoacryl/lipiodol mixture).
- MeSH
- enbukrylát farmakologie terapeutické užití MeSH
- ethjodizovaný olej farmakologie terapeutické užití MeSH
- hepatektomie metody MeSH
- játra účinky léků MeSH
- lidé středního věku MeSH
- lidé MeSH
- polyhydroxyethylmethakrylát farmakologie terapeutické užití MeSH
- senioři MeSH
- terapeutická embolizace metody MeSH
- vena portae účinky léků MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- klinické zkoušky kontrolované MeSH
- srovnávací studie MeSH
BACKGROUND: Treating great and small saphenous vein trunk insufficiency with cyanoacrylate glue is the least taxing treatment method of all available techniques. Due to long-term unavailability of commercial kits with n-butyl-2-cyanoacrylate (histoacryl) in the Czech Republic, we used a modified technique. PATIENTS AND METHODS: Fifty-six limbs in 49 patients suffering from great saphenous vein or small saphenous vein insufficiency in combination with symptomatic chronic venous insufficiency and complicating comorbidities were treated with a modified endovascular cyanoacrylate glue application technique. RESULTS: The immediate success rate of the treatment was 98 %. In follow-up intervals of six weeks, six months, one year, and two years, the anatomical success rates of embolization (recanalization of no more than 5 cm of the junction) were 98, 96, 94, and 94 %, respectively. At identical intervals the venous insufficiency was scored according to the Aberdeen Varicose Vein Questionnaire and the American Venous Clinical Severity Score. In both cases, improvement was demonstrated over the two-year follow-up, with a 0.5 % significance level. Specific clinical signs of venous insufficiency were also evaluated, such as pain, oedema, clearance of varicose veins, and healing of venous ulceration. One severe complication - a pulmonary embolism - was reported, without consequences. CONCLUSIONS: We demonstrated that treating insufficient saphenous veins with modified histoacryl application brought a relief from symptoms of venous insufficiency and that the efficiency of this technique is comparable to commonly used methods.
- MeSH
- časové faktory MeSH
- chronická nemoc MeSH
- dospělí MeSH
- enbukrylát aplikace a dávkování škodlivé účinky MeSH
- endovaskulární výkony * škodlivé účinky MeSH
- Kaplanův-Meierův odhad MeSH
- lidé středního věku MeSH
- lidé MeSH
- prospektivní studie MeSH
- rizikové faktory MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- stupeň závažnosti nemoci MeSH
- terapeutická embolizace * škodlivé účinky MeSH
- varixy diagnostické zobrazování chirurgie terapie MeSH
- vena saphena * diagnostické zobrazování chirurgie MeSH
- výsledek terapie MeSH
- žilní insuficience diagnostické zobrazování chirurgie terapie MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- Publikační typ
- časopisecké články MeSH
- Geografické názvy
- Česká republika MeSH
Background: A histopathological examination was conducted on vein samples from six patients who had undergone great saphenous vein sealing with Histoacryl and Lipiodol to treat chronic venous insufficiency of the superficial venous system. Patients and methods: In each patient a sample of the complete vein including the surrounding tissue was obtained through a minor incision under perioperative sonographic monitoring. Each patient had signed an informed consent form. Samples were taken at the following intervals: six days, six weeks, six months, one year, two years, and three years after treatment. Results: N-butyl-2-cyanoacrylate with Lipiodol induces a thrombotic reaction in the acute phase and endothelium is destroyed but no significant inflammation or substantial vascular wall damage is present. In the subsequent period, a foreign body giant cell reaction emerges accompanied by only moderate chronic inflammation that does not extend to the vascular wall or the surrounding tissue. The thrombus is organized with minimal recanalization. The foreign material is gradually degraded, and it is no longer detectable after three years. The vessel wall showed slight sclerotization. Conclusions: N-butyl-2-cyanoacrylate that has been applied gradually degrades over the course of three years accompanied by a giant cell reaction, mild chronic inflammation and cicatrices, but there is minimal recanalization of the obturated section.
- MeSH
- enbukrylát MeSH
- lidé MeSH
- varixy * MeSH
- vena saphena * MeSH
- výsledek terapie MeSH
- žilní insuficience * MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
Hemobilia is a rare phenomenon. In this case report we present an emergent transcatheter glue embolization (in which N-butyl cyanoacrylate is used as an embolizing agent) due to arteriobilary fistula occurred following the laparoscopic cholecystectomy in a 41-year-old woman.
- MeSH
- biliární píštěl etiologie terapie MeSH
- cévní píštěle etiologie terapie MeSH
- cholecystektomie laparoskopická škodlivé účinky MeSH
- dospělí MeSH
- enbukrylát terapeutické užití MeSH
- endovaskulární výkony MeSH
- hemobilie etiologie MeSH
- krvácení etiologie terapie MeSH
- lidé MeSH
- terapeutická embolizace MeSH
- tkáňová adheziva terapeutické užití MeSH
- žlučník krevní zásobení MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- ženské pohlaví MeSH
- Publikační typ
- kazuistiky MeSH
Cíl: Embolizace insuficientní velké a malé safény modifikovaným N-2-butylakrylátem komerčně vyráběnými sety je v současnosti nejšetrnější způsob jejich ošetření. Při nedostupnosti komerčního setu jsme použili modifikovanou techniku aplikace směsi Histoacrylu a Lipiodolu, běžně používanou k ošetření cévních malformací, tumorů nebo při krvácení cév. Metodika: Během 2 let jsme ošetřili 56 končetin u 49 pacientů s insuficietní vena saphena magna nebo vena saphena parva. Do studie byli atrahováni zejména pacienti s těžkou formou žilní nedostatečnosti a pacienti s komplikujícími komorbiditami. Ošetření bylo provedeno modifikovanou technikou aplikace akrylátového lepidla. Výsledky: Bezprostřední úspěšnost ošetření byla 98 %. V sledovaných intervalech 6 týdnů, 6 měsíců, 1 rok a 2 roky byla anatomická úspěšnost okluze (rekanalizace do 5 cm od junkce) 98, 96, 94, 94 %. Ve stejných intervalech byl hodnocen stav žilní nedostatečnosti podle Aberdeenského skórovacího dotazníku a amerického Venous Clinical Severity Score. U obou jsme dosáhli zlepšení proti výchozím hodnotám na 0,05% hladině významnosti. Byly hodnoceny i jednotlivé známky žilní nedostatečnosti. Jsou diskutovány rizikové faktory selhání metody a pooperační komplikace. U jednoho pacienta jsme zaznamenali únik částečky lepidla do plic. Závěr: Podařilo se nám prokázat, že ošetření velkých kmenů VSM a VSP embolizací Histoacrylem odstranilo u našich pacientů příznaky žilní nedostatečnosti a efektivitou je srovnatelné s běžně užívanými metodami.
Goal: The embolization of large and small safena with modified N2-butylacrylate by commercially produced sets is currently the gentlest treatment method. We used a modified technique of applying Histoacryl and Lipiodol, commonly used to treat vascular malformations, tumors, or bleeding vessel. Method: Over two years, 56 limbs were treated in 49 patients with insufficient saphena magna or saphena parva. In particular, patients with severe forms of venous insufficiency and patients with complicating comorbidities were enrolled in the study. The treatment was carried out by a modified technique of acrylate adhesive application. Results: Immediate success rate was 98%. At the observed intervals of 6 weeks, 6 months, 1 year and 2 years, the anatomical success rate of occlusion (recanalization up to 5 cm from the junction) was 98, 96, 94, 94%. At the same intervals, the venous insufficiency status was evaluated by the Aberdeen Scoring Questionnaire and the American Venous Clinical Severity Score Venous Scoring System. In both cases, we showed improvement to 0.5% significance level in the two-year follow-up. Individual clinical signs of venous insufficiency were also evaluated. Risk factors of failure of the technique and post-operative complications are discussed. One patient experienced leakage of the adhesive into the lungs. Conclusion: We have shown that treatment of large VSM and VSP embolizati-on by Histoacryl has eliminated symptoms of venous insufficiency and efficacy in our patients comparable to commonly used methods.
The Enhanced Permeability and Retention (EPR) effect is extensively used in drug delivery research. Taking into account that EPR is a highly variable phenomenon, we have here set out to evaluate if contrast-enhanced functional ultrasound (ceUS) imaging can be employed to characterize EPR-mediated passive drug targeting to tumors. Using standard fluorescence molecular tomography (FMT) and two different protocols for hybrid computed tomography-fluorescence molecular tomography (CT-FMT), the tumor accumulation of a ~10 nm-sized near-infrared-fluorophore-labeled polymeric drug carrier (pHPMA-Dy750) was evaluated in CT26 tumor-bearing mice. In the same set of animals, two different ceUS techniques (2D MIOT and 3D B-mode imaging) were employed to assess tumor vascularization. Subsequently, the degree of tumor vascularization was correlated with the degree of EPR-mediated drug targeting. Depending on the optical imaging protocol used, the tumor accumulation of the polymeric drug carrier ranged from 5 to 12% of the injected dose. The degree of tumor vascularization, determined using ceUS, varied from 4 to 11%. For both hybrid CT-FMT protocols, a good correlation between the degree of tumor vascularization and the degree of tumor accumulation was observed, within the case of reconstructed CT-FMT, correlation coefficients of ~0.8 and p-values of <0.02. These findings indicate that ceUS can be used to characterize and predict EPR, and potentially also to pre-select patients likely to respond to passively tumor-targeted nanomedicine treatments.
- MeSH
- akrylamidy aplikace a dávkování MeSH
- enbukrylát MeSH
- kontrastní látky aplikace a dávkování MeSH
- krevní objem MeSH
- lékové transportní systémy * MeSH
- mikrobubliny MeSH
- myši nahé MeSH
- nádorové buněčné linie MeSH
- nádory krevní zásobení metabolismus patofyziologie ultrasonografie MeSH
- permeabilita MeSH
- regionální krevní průtok MeSH
- tomografie metody MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
