Radiopaque catheter
First Claim
1. A catheter comprising a plastic tubular member, said member including longitudinal stripe means comprising radiopaque material mixed with the plastic of the tubular member, and longitudinal segment means of transparent material positioned beside said stripe means, the material of said stripe means having at least equal elongation and less ultimate tensile strength than the material of said transparent segment means.
1 Assignment
0 Petitions
Accused Products
Abstract
A silicone rubber catheter carries radiopaque stripes comprising a mixture of silicone rubber and the finely divided radiopaque material, the stripes being spaced from each other by transparent, longitudinal segments. The radiopaque stripes are preferably positioned in diametrically opposed, spaced relation to each other about the circumference of the catheter and occupy a total of 50° to 270° of the catheter circumference. The elongation of the catheter portion defining the stripes is preferably at least as great as the elongation of the catheter portion defining the transparent, longitudinal segments, and the tensile and tear strengths of the transparent segments are preferably higher, so that upon stretching of the catheter most of the stress can be diverted to the transparent segments of the catheter.
199 Citations
9 Claims
- 1. A catheter comprising a plastic tubular member, said member including longitudinal stripe means comprising radiopaque material mixed with the plastic of the tubular member, and longitudinal segment means of transparent material positioned beside said stripe means, the material of said stripe means having at least equal elongation and less ultimate tensile strength than the material of said transparent segment means.
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6. A catheter comprising a silicone rubber tubular member, said member including a pair of longitudinal stripes of radiopaque material, said stripes being positioned in diametrically opposed, spaced relation to each other about the circumference of the tubular member and comprising a mixture of silicone rubber and finely divided barium sulfate containing from 35 to 70 weight percent of barium sulfate, said tubular member also defining a pair of diametrically opposed, transparent, longitudinal segments positioned between said stripes for viewing the catheter interior of the tubular member, said stripes occupying a total of 50°
- to 270°
of the circumference of the tubular member, said tubular member having an inner diameter of no more than 2 mm. and an outer diameter of no more than 4 mm., the elongation of the tubular member portion defining said stripes being at least equal to the elongation of the tubular member portion defining said transparent, longitudinal segments, and the ultimate tensile strength and tear strength of the tubular member portion defining the transparent, longitudinal segments is greater than the ultimate tensile strength and tear strength of the tubular member portion defining the radiopaque stripes. - View Dependent Claims (7, 8, 9)
- to 270°
Specification