Wire guided dilator device
AssigneeKeymed (Medical & Industrial Equipment) Ltd.
InventorStuart M. Greengrass
Life of this patent
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Abstract
The dilator has a central bore for a guide wire and a flexible distal portion merging continuously with an intermediate portion of constant cross-section. A proximal portion is convex in profile and merges continuously with the intermediate portion. The distal portion comprises a hemispherical tip followed by a conical section, a concave section and a convex section, respectively. The dilator is primarily for dilating oesophageal strictures when used in conjunction with an endoscope to place the guide wire and is urged along the wire using a threadably engaged insertion rod.
Claims9
A wire guided dilator device, comprising:
- a dilator having a central bore through which a guide wire extends in use, said dilator comprising a flexible distal portion, a proximal portion and an intermediate portion, said distal, intermediate, and proximal portions each having a smooth outer surface which is continuous with the other two outer surfaces so as to form a smooth, continuous exterior dilator surface, with said intermediate portion of substantially constant cross-section, said proximal portion of proximally decreasing cross-section and said distal portion having a cross-section continuously and distally decreasing to a smooth hemispherical tip,
- and said dilator, apart from the bore formed therein, being solid and integrally formed from rubber or plastics material and said intermediate section being essentially non-deformable in cross section such that the passage of the dilator through a stricture will cause the stricture to dilate to conform to the outer periphery of said intermediate portion
Dependencies are inferred from the claim text.