| 摘要 |
PCT No. PCT/SE97/00826 Sec. 371 Date Oct. 7, 1998 Sec. 102(e) Date Oct. 7, 1998 PCT Filed May 20, 1997 PCT Pub. No. WO97/43951 PCT Pub. Date Nov. 27, 1997A medical apparatus (1) for detecting changes in the cross section of an elongate body cavity, for example, a human urinary tract. The apparatus includes a retainer portion (60) and a sensor portion (10) connected to the retainer portion and having a sensitive body (30) of flexible material. The sensor portion has a first end portion which is fixed to the retainer device (60). The sensitive body is designed as a catheter-like device projecting from the retainer portion (60) and provided at its free end (17) with a rigid closure (37). The sensitive body is hollow and its cavity varies according to the compression of the sensitive body due to cross-sectional changes of the elongated body being examined. A pressure-sensing device indicates the pressure in the cavity and thus the cross sectional changes of the elongated body.
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