| 摘要 |
An instrument for measuring a dilatation of cervix uteri during a first stage of labor, includes two elongated arms pivotally connected with one another in the region of their central portion and having two opposite ends; two loops for passing fingers of a physician and arranged on one end of the arms; a scale arranged on another end of one of the arms and having a plurality of graduation marks which are spaced from one another in a transverse direction. An indicating tip is provided at another end of the other arm and movable relative to the graduation marks when a physician passes his or her fingers through the loops and moves the fingers relative to one another to palpate an edge of an orifice of cervix uteri. A structure for pivotally connecting the arms with one another and a structure for at least temporarily fixing a position of the indicating tip relative to a corresponding graduation mark of the scale when a physician's fingers achieve their final position during determination of dilatation of cervix uteri allows the device to be removed without losing the measurement.
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