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  • Articles: DFG German National Licenses  (3)
  • Arteries, extremities  (1)
  • Bile ducts  (1)
  • Key words: Anus  (1)
  • 1
    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
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European radiology 7 (1997), S. 1035-1042 
    ISSN: 1432-1084
    Keywords: Key words: Anus ; abnormalities ; Anus ; MR imaging ; Fistula ; anal ; Intestines ; MR imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The aim of this study was to revisit anal anatomy, to explain surgical terminology in perianal complications of Crohn disease, and to show the MR imaging findings of perianal fistulas and abscesses. To this end more than 200 patients were studied using surface coils (Helmholtz; phased array) at 1.0 and 1.5 T. Transverse and coronal T1- and T2-weighted images were obtained. Parks' classification was used to describe perianal abscesses and fistulas. This pictorial essay shows the normal anal anatomy and pathologic findings such as subcutaneous, para-anal, ischiorectal, intersphincteric, and supralevatoric abscesses and fistulas. MR imaging with surface coils is well suited to showing the anal anatomy and to reliably describing perianal abscesses and fistulas according to surgical terminology.
    Type of Medium: Electronic Resource
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  • 3
    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
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