| 摘要 |
A cervical canal dilating assembly and method of use are shown. The dilator assembly includes a plastic shaft, a first inflatable member, and a second inflatable member. The shaft can range from being rigid to highly flexible. The second inflatable member is fabricated of a non-elastic material and is configured to have a maximum inflatable diameter. The second inflatable member is configured to have a predetermined maximum inflatable diameter ranging from 4 to 20 mm. The dilating assembly can also be at least partially covered by a sheath. A control system includes means for measuring pressure configured for at least monitoring the pressure of the second inflatable member. A wire can be used in selected configurations to stiffen and shape the shaft. In operation, the initial penetration of the dilating assembly into the uterus uses a 'wire for increased stiffness. The dilating assembly is then forwarded through the remainder of the cervical canal. The first inflatable member is expanded in the uterus after being uncovered by the sheath. The second inflatable member is positioned in the cervical canal and gradually inflated to a predetermined maximum diameter. |
