Device and method for determining the length of a urethra

• US 5,657,764 A
• Filed: 08/30/1995
• Issued: 08/19/1997
• Est. Priority Date: 08/30/1995
• Status: Expired due to Fees

• Current Assignee: UroMed Corporation
• Original Assignee: UroMed Corporation
• Inventors: Grigoriev, Victor E., Ventres, Thomas, Felice, Leo C., Wisnosky, Carl J., Coulter, Christopher C.
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): RASCHE, PATRICK WILLIAM
• Application Number:
  US08/521,246
• Time in Patent Office: 720 Days
• Field of Search: 128/774, 128/775, 128/778, 600/29, 600/30, 600/31, 604/102, 604/203, 606/102
• US Class Current: 600/591
• CPC Class Codes: A61B 5/1076 for measuring dimensions inside body cavities, e.g. using catheters A61B3/1005 takes precedence

Abstract

There is presented a urethral measuring device for determining the length of a human urethra, the measuring device comprising a member having an expandable portion at a first end and adapted to receive fluid from an external source at a second end. The member includes graduations arranged such that the graduations are located a pre-specified distance from the expandable portion. In certain embodiments, the graduations also are located at least "x" distance from the meatus of the urethra when the device is inserted and in an operative position. The measuring device further includes a collar slidably disposed and movable on the member and is used as a pointer against the graduations to measure the length of the urethra. There is further presented a method for determining the length of a urethra, utilizing the aforesaid device.

Claims

1. A device for determining the length of a urethra comprising:

a hollow member having an expandable portion at a first end and a length greater than the length of the urethra to be measured;

wherein said hollow member further includes a plurality of beads spaced equally apart from one another in a pre-defined pattern, each of the plurality of beads being located a prespecified distance from the first end of the hollow member, and being representative of a length of the urethra;

wherein at least one of said plurality of beads is observable at the meatus when said hollow member is inserted into the urethra and said expandable portion anchors in the bladder neck.

2. The device of claim 1 wherein said hollow member further comprises an open second end in fluid communication with said expandable portion.

3. The device of claim 2 wherein said expandable portion comprises a flexible membrane affixed to said hollow member, said flexible membrane being in fluid communication with said open second end.

4. The device of claim 2 wherein said open second end of said hollow member is adapted to receive fluid from an external source, whereby expansion of said expandable portion occurs upon transmission of fluid from said external fluid source to said expandable portion.

5. The device of claim 1, further comprising means for maintaining and reversing the expansion of said expandable portion.

6. The device of claim 5 wherein said means for maintaining and reversing said expansion is a clamp acting on said hollow member to selectively open and close a passage of said hollow member.

7. The device of claim 1 wherein said hollow member is comprised of a compressible biocompatible material, said compressible biocompatible material allowing the hollow member to conform to the natural shape of the urethra, thereby preventing deformation thereof.

8. A method of determining the length of a urethra comprising the following steps:

providing a device including a hollow member having an expandable portion at a first end, wherein said hollow member further includes a plurality of beads spaced equally apart from one another in a pre-defined pattern, each of the plurality of beads being located a pre-specified distance from the first end of the hollow member, and being representative of a length of the urethra;

inserting said hollow member into the urethra until said hollow member is positioned in the bladder,

expanding said expandable portion in the bladder and retracting said expandable portion until said hollow member anchors in the bladder neck;

maintaining said expansion of said expandable portion;

observing the one of said plurality of beads proximate the meatus when said hollow member is inserted into the urethra and said expandable portion is anchored in the bladder neck; and

determining the length of the urethra based on the observed one of said plurality of beads.

9. The method of determining the length of a urethra according to claim 8, further comprising the steps of reversing said expansion of said expandable portion, and removing said device from the urethra.

10. The method of determining the length of a urethra according to claim 8 wherein said device further includes an external fluid source.

11. The method of determining the length of a urethra according to claim 10, further comprising interconnecting said external fluid source to said hollow member, and transmitting fluid from said external fluid source to said expandable portion.

12. The method of determining the length of a urethra according to claim 11 wherein said device further includes a means for controlling the transmission of fluid into and out of said expandable portion.

13. The method of determining the length of a urethra according to claim 12, wherein said steps of maintaining and reversing said expansion includes actuating said controlling means to selectively maintain and reverse the expansion of said expandable portion.