Zusammenfassung
Hintergrund: Bei der APC (Argon-Plasma-Coagulation) handelt es sich um ein thermisches Ablationsverfahren.
Dabei wird durch ionisiertes Gas (Argon-Plasma) Hochfrequenzenergie übertragen, dies
führt zur Koagulation des Gewebes. Der PRECISE-Modus ist ein neuer Modus mit vergleichsweise
geringem Energieeintrag und besserer Reproduzierbarkeit der thermischen Gewebeeffekte.
Diese sind unabhängig vom Abstand der Sondenspitze zum Gewebe durch eine automatische
Nachregulation des Generators während der Applikation. Folge ist eine nur mäßige Erhitzung
des Gewebes und ein begrenzter Tiefeneffekt. Das Ziel der Studie ist die Evaluation
des PRECISE-Modus bei Patienten mit Angiodysplasien im Zökum und/oder Dünndarm. Methodik: 94 Patienten wurden eingeschlossen. Die Effektivität und Sicherheit des PRECISE-Modus
wurden auf der Basis des lokalen Koagulationseffekts, der Rate an Re-Blutungen und
Transfusionen sowie der Komplikationen (Infektion, Perforation) analysiert. Resultate: Es wurden 44 weibliche und 50 männliche Patienten aufgenommen, medianes Alter 65,5
± 8,5 Jahre. 58 Patienten (62 %) boten Läsionen im Dünndarm, 28 (30 %) im Zökum und
bei 8 (8 %) Patienten fanden sich Läsionen sowohl im Zökum als auch Dünndarm. Alle
234 Läsionen von 94 Patienten konnten erfolgreich koaguliert werden. Es fanden sich
keine Perforationen, Blutungen oder Gewebe-Karbonisationen nach der Applikation. Re-Blutungen
traten bei 18 (19 %) Patienten nach einem medianen Follow-up von 6,1 Monaten auf,
neue Läsionen in gleicher Lokalisation fanden sich bei 15/18 (16 %) Patienten. Diskussion: Im Vergleich zu den bekannten APC-Modi FORCED und PULSED scheint der PRECISE-Modus
besonders geeignet für die Behandlung blutender Angiodysplasien in „kritischen” dünnwandigen
Lokalisationen wie Zökum und Dünndarm. Der Koagulationseffekt ist vergleichbar effektiv,
bei allerdings besserer thermischer Tiefenkontrolle und damit höherer Sicherheit.
Abstract
Background: APC is a thermal coagulation technique that uses ionized argon to transmit high-frequency
electrical current, contact-free, to tissue. Precise APC is one of the new modes and
is characterized by a small and distinctive energy input, higher reproducibility of
tissue effects which is almost independent of the probe distance. The aim of the study
was the evaluation of precise APC in patients with bleeding angiodysplasia’s in the
cecum or the small bowel. Aim/Methods: Patients (pts.) with bleeding angiodysplasia of the cecum or small bowel were prospectively
enrolled. Effectivity and safety of APC was assessed by evaluating the local coagulation
effect, number of rebleedings and transfusions and complications (perforation, infection).
Results: There were 50 males and 44 females, median age 65.5 ± 8.5 years. 58 pts. (62 %) had
lesions in the small bowel, 28 pts. (30 %) lesions in the cecum and 8 pts. (8 %) lesions
in small bowel and cecum. All 234 visible lesions in 94 pts. were coagulated successfully.
There was no perforation, active bleeding and tissue carbonization after the procedure.
Re-bleeding was recognized in 18 pts. (19 %) after a mean follow-up of 6.1 months
and new lesions in the same area were seen in 15 / 18 pts (16 %). Conclusion: In a historical comparison to forced or pulsed APC, precise APC may be a more appropriate
option for the treatment of bleeding angiodysplasia’s in critical locations like the
cecum or small bowel. The coagulation effect seems to be comparable and due to its
better depth control we assume a better safety, especially in preventing perforations.
Schlüsselwörter
Angiodysplasie - gastrointestinale Blutung - Argon-Plasma-Coagulation - PRECISE APC
Key words
angiodysplasia - gastrointestinal bleeding - argon-plasma coagulation - PRECISE APC
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PD Dr. Axel Eickhoff
Division of Gastroenterology, Klinikum Hanau
Leimenstr. 20
63450 Hanau
Germany
Phone: ++ 49/61 81/2 96 42 10
Fax: ++ 49/61 81/2 96 42 11
Email: axel_eickhoff@klinikum-hanau.de