| 摘要 |
<p>A speculum (10) having a primary expansion means (12) to expand a body passage or cavity in which the speculum (10) is inserted. The speculum (10) has a peripheral expansion surface (12, 14) arranged to support an inner peripheral wall area of the body passage or cavity when the primary expansion means (12) is in an expanded condition. The expansion force applied by the primary expansion means (12) is distributed at least at one cross-sectional zone of the body passage or cavity substantially evenly about the inner peripheral wall area of the expanded body passage or cavity. Also described is an apparatus to receive and introduce a rolled cylindrical speculum into a body passage. The apparatus is withdrawn from the body, leaving the speculum in place.</p> |
