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  • 1
    Electronic Resource
    Electronic Resource
    Experimental and clinical results with a pulsed dye laser for angioplasty (1993)
    Springer
    European radiology 3 (1993), S. 12-18 
    Details
    ISSN: 1432-1084
    Keywords: Arteries, extremities ; Arteries, laser angioplasty ; Arteries, transluminal angioplasty ; Lasers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We investigated a pulsed 504 nm dye laser at a pulse duration of 1.44 μ and a pulse rate of 10 Hz for its angioplasty capabilities. Laser energy was delivered via 9 F multi-fiber ring catheters. Our experimental data showed effective ablation of atheroma and disruption of calcified plaques at an energy fluence of 9.5 J/cm2 under saline and blood. Histologically, there was only minimal thermal injury to adjacent tissues. Irregular tissue borders after radiant energy exposure of 12.7 J/cm2, under blood, provide strong evidence for ablation by a shock-or pressure-wave mechanism. Percutaneous peripheral laser-assisted angioplasty was performed in 25 patients with arterial occlusive disease of the iliac and femoro-poplteal arteries (mean occlusion length 7.2 cm). All lesions were initially traversed by a guide-wire. Technical success was achieved in 24 out of 25 patients (96%). Laser angioplasty decreased the mean stenosis rate from 100% to 51± 12% (P 〈 0.01). The ankle-brachial index (ABI) rose from 0.48±0.16 before to 0.88±0.10 after intervention (P 〈 0.01) with a value of 0.82±0.15 at 6 months follow-up. The overall success rate, judged clinically and by ABI determinations in all patients, was 84% at a mean follow-up period of 7.9 months. The number of stand-alone laser procedure was 21%. Clinical application of the delivery devices proved to be safe due to the “over-the-wire” approach. Our prelimanary clinical data encourage further refinement of pulsed dye laser angioplasty for more efficacious debulking of atheroma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00173516
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Yamakawa-Prothese mit prolongierter Verweildauer als Therapiekonzept am Beispiel einer benignen biliären Striktur (1998)
    Springer
    Der Chirurg 69 (1998), S. 776-779 
    Details
    ISSN: 1433-0385
    Keywords: Key words: Bile ducts ; injuries ; Bile ducts ; interventional procedure ; Bile ducts ; stenosis or obstruction ; Bile ducts ; stents and prostheses ; Schlüsselwörter: Gallenwegverletzungen ; Gallenwege ; interventionelle Prozeduren ; Gallenwege ; Stenosen und Obstruktionen ; Gallenwege ; Stents und Prothesen.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung. Ziel: Als Alternative zur operativen Revision einer hohen, benignen biliären Striktur soll das technische Vorgehen der großkalibrigen Gallengangschienung mit Yamakawa-Prothesen ohne repetitive Ballondilatation am Beispiel einer Patientin geschildert werden. Methoden: Zur Stenoseüberbrückung wurde bilateral eine percutan-transhepatische Anlage von 2 Yamakawa-Prothesen aus Silikon vorgenommen (Ductus hepaticus, rechts: 14-F-Prothese; links: 12-F-Prothese). Die Prothesen wurden unter permanentem oralen Antibioticaschutz alle 8 Wochen durch neue Prothesen ersetzt. Nach 8 Monaten wurden beide Prothesen entfernt. Ergebnisse: Die Kontroll-Cholangiographie zeigte ein normal-weites intrahepatisches Gallenwegsystem rechts und eine 50 %ige Mündungsstenose des linken Ductus hepaticus. Die Nachbeobachtung über einen Zeitraum von 18 Monaten zeigte keinen Hinweis auf eine Abflußbehinderung des Gallengangsystems. Schlußfolgerungen: Im Vergleich zur repetitiven Ballondilatation und zur Implantation metallischer Gallenwegstents bietet sich die prolongierte, großkalibrige Schienung benigner biliärer Strikturen mit Yamakawa-Prothesen als alternative Therapieform an.
    Notes: Summary. Aim: As an alternative method to the operative revision of benign bile duct strictures, we report the use of a large-bore bile duct prosthesis (Yamakawa prosthesis) in one patient. Methods: Bilateral percutaneous transhepatic implantation of Yamakawa prostheses (14 F right side, 12 F left side) was performed without adjunctive balloon dilatation. The prostheses were exchanged every 8 weeks under continuous antibiotic treatment and were finally removed after 8 months. Results: Control cholangiography showed a normal intrahepatic biliary system on the right side and a 50 % stenosis at the orifice of the left hepatic duct. Follow-up over 18 months showed no signs of recurrent disease. Conclusions: In comparison to balloon dilatation and implantation of metallic stents, prolonged bilateral splinting with large-bore Yamakawa prostheses seems to be an alternative for the treatment of benign bile duct strictures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001040050490
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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