| 摘要 |
A device is used for expanding a surgical operation or an ulceration, particularly a deep ulceration, and for maintaining it in expanded condition. The device incorporates a spiral and a cloth-formed material associated thereto. The spiral and the cloth-formed material are arranged to form an internal passage, which makes possible access to inner part of the human body, e.g. a vertebrate, vein, intestine, etcetera. The device is easy to install and can he adapted to the type of operation or wound. It is made in technically simple material and I advantageous from cost aspects.
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