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16 December 2010

Hemodynamic efficacy of sequential hemoclip application using the Olympus HX-110/610 reloadable clipping device in spurting bleedings

Anke EndeABCDEF, Yurdaguel ZopfBCD, Roland HeideBCD, Thomas BernatikB, Markus WehlerB, Dieter SchwabBC, Eckhart G. HahnE, Juergen MaissABCDEFG

DOI: 10.12659/MSM.881313

Med Sci Monit 2011; 17(1): MT1-6

Abstract

Background: Hemoclip application in GI-hemorrhage has proven to be effective. Clinical experience shows that multiple clips are frequently necessary. In 2005, an easily reloadable clip-applicator was introduced. We evaluated the hemodynamic efficacy of this new device.
Material/Methods: We prospectively compared the new clipping device (Olympus HX 110/610) in a validated experimental setting using the compactEASIE®-simulator for GI bleeding. The artificial blood circulation system in the simulator was connected to a pressure transducer. Four investigators of different endoscopic experience (1000–6000 endoscopies) treated 12 bleeding sources each, with up to 6 clips for each bleeding location. Pressures were recorded to objectify the additive effects of sequential clip application on the reduction in vessel diameter. The intervention was abandoned if a maximum measurable pressure of 300 mmHg was achieved.
Results: Hemoclip application led to a significant increase of peak pressure (91±100 mmHg, p<0.001) and mean pressure (95±99 mmHg, p<0.001), representing a significant reduction in vessel diameter. Pooled data showed a significant stepwise increase in mean and maximum system pressure, resulting in reduction of vessel diameter up to the fifth hemoclip. On average, 5 clips (range 1–6) were used. More experienced endoscopists achieved a higher increase in mean pressure (167 and 118 mmHg vs 72 and 23 mmHg, p<0.05). Mean reloading time was 39 seconds (19–49 sec).
Conclusions: Sequential application of multiple hemoclips led to an increasing effect, comparable to the results of previous clinical trials. The number of hemoclips applied correlated inversely, but not significantly, with the endoscopist´s experience. Expensive single-use clips appear dispensable in view of the short reloading time.

Keywords: Hemostatic Techniques - instrumentation, Prospective Studies, Gastrointestinal Hemorrhage - therapy, Endoscopy, Gastrointestinal - methods, Blood Pressure, Sus scrofa

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