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US 4,705,041 AGranted
Dilator for Sphincter of Oddi
OwnerIl G. Kiminventor
Life of this patent
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Abstract
Apparatus and process for dilating the Sphincter of Oddi comprising a flexible cylindrical catheter with an expandible tip to allow verification of its location by outside palpitation and a plurality of hollow flexible dilators which are slidingly inserted coaxialy over the catheter to stretch the Sphincter to the desired extent, each dilater comprising an enlarged tip portion, a shaft portion and a tail or handle portion finned to accommodate the user.
Claims8
An apparatus for dilation of the Sphincter of Oddi comprising
- a. a hollow cylindrical catheter at a diameter accommodatingly smaller than the Sphincter of Oddi;
- b. a soft insertion tip member mounted on said catheter;
- c. an expandible member mounted axially adjacent to said tip member and in communication with the interior of the catheter;
- d. means for expanding said expandible
- e. a series of hollow, flexible dilators of increasing outer diameter each with an inner diameter, said inner diameter accommodatingly larger than the outer diameter of the catheter, each dilator having an enlarged hollow tip portion on one end and a handle portion on the other end;
- whereby dilation occurs by insertion of the catheter until the tip is in the desired location and subsequent insertion of the dilators one at a time stepwise in order of increased outer diameter coaxially over the catheter until the desired dilation is achieved whereupon the dilator and catheter apparatus is removed.
3 more elements
The process for dilation of the Sphincter of Oddi comprising:
- a. insertion of a hollow, cylindrical catheter;
- having a soft tip member, an expandible member mounted axially adjacent to the tip member and in communication with the interior of the catheter, and having a catheter diameter smaller than the Sphincter of Oddi's until the tip passes through the Sphincter;
- b. expanding the expandible member;
- c. verifying the tip location by palpitation;
- d. sliding a first, flexible, hollow dilator over the catheter until it passes through the Sphincter thereby dilating the Sphincter;
- e. removing the first dilator and successively inserting and removing dilators of increasing exterior diameter thereby dilating the Sphincter until the desired dilation is achieved;
- and
- f. removing the catheter thereby completing the process.
5 more elements
Dependencies are inferred from the claim text.