Patent ID: 7549997

Claim:
A method of dilating a body canal comprising: inserting a cylindrical rod comprising a first end, a second end, and a threaded portion into the body canal; further inserting the cylindrical rod until said first end exits said body canal and enters a cavity; inflating an inflatable member disposed on said first end of said cylindrical rod; retracting said cylindrical rod until said inflatable member contacts said body canal; disposing a first tubular member comprising a first outer diameter, a threaded bore and a tapered end onto said second end of said cylindrical rod whereby said second end is disposed within said bore; moving said first tubular member towards said first end of said cylindrical rod until said threaded bore engages said threaded portion; rotating said first tubular member to threadingly displace said first tubular member in gradual increments towards said first end of said cylindrical rod and into said body canal; dilating said body canal with said first tubular member; removing said first tubular member from said cylindrical rod; disposing a second tubular member comprising a second outer diameter larger than said first outer diameter, a threaded bore and a tapered end onto said second end of said cylindrical rod whereby said second end is disposed within said bore; moving said second tubular member towards said first end of said cylindrical rod until said threaded bore engages said threaded portion; rotating said second tubular member to threadingly displace said second tubular member in gradual increments towards said first end of said cylindrical rod and into said body canal; and dilating said body canal with said second tubular member.