We report here on the efficacy and safety of three arthroscopic procedures using a Holmium: Yag laser in two high-responder haemophiliacs. The two patients were treated with an activated prothrombin complex concentrate (FEIBA; Immuno, Vienna, Austria). Treatment was started just before surgery and continued for 4-8 days. On one occasion antifibrinolytics were concomitantly used without thromboembolic complication. Post-operative blood loss was slight, joint mobility was rapidly acceptable and full weight bearing without pain was possible on day 4. Such a procedure would appear to be superior to conventional arthroscopic synovectomy utilizing mechanical devices in haemophiliacs, because it might improve the quality of local haemostasis and the rapidity of post-operative recovery. In addition, it is also the technical procedure of choice in haemophilic patients with inhibitors who need synovectomy.

In this paper we propose and investigate a new but simple and natural extension of the way people record video. This extension allows to unfold the semantics of video clips and thus enables a completely new set of applications on raw video footage. Two microphones are connected to a camcorder: a headworn speech input microphone and an environmental microphone. During recording the cameraman speaks out loud content-descriptive annotations and/or editing commands. Due to the two-microphones setup the sound of annotations and editing commands can be removed from the environmental audio by adaptive filtering enabling people to play back the video as if there had been no annotations. Simultaneously, these annotations are transcribed to ASCII by means of a standard speech recognition engine. The viability of this approach is demonstrated by means of an important application for video libraries: the automatic abstraction of raw video footage.0-7695-0695-X/00 $10.00 (c) 2000 IEEE

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