Apparatus for stricture diagnosis and treatment
First Claim
1. Cytology brush apparatus for being introduced over a guidewire into a living body to obtain a cell sample, said apparatus comprising:
- A. flexible catheter means for being positioned in the living body, said catheter means terminating at a distal end, first lumen means for allowing said catheter means to slide over the guidewire and second lumen means for providing a second channel in said catheter means, said first and second lumen means comprising first and second lumens, respectively, that extend through said catheter means and through the distal end thereof,B. cytology brush means for obtaining a cell sample from the living body wherein said cytology brush means is independent of said first and second lumens, operator means extending through said second lumen,C. for supporting said cytology brush means, said operator means including manipulation means for enabling said cytology brush means to be extended beyond the distal end of said catheter means from said second lumen and to be retracted into said second lumen of said catheter means independently of the guidewire disposed in said first lumen to obtain the cell sample.
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Accused Products
Abstract
Apparatus for use in the diagnosis and treatment of strictures in a biliary duct, urinary tract or pancreatic tract. The apparatus includes a dual lumen catheter device. One lumen size is sized to accommodate a guidewire. A second, parallel lumen has a non-circular cross-section and carries a cytology brush at one end that couples through an operator to a manipulator at another end. The cytology brush has an effective diameter that is greater than the diameter of the catheter device. Brush cytology samples are obtained without removing the guidewire from a stricture and without introducing any relative motion between the guidewire and the catheter. As the cytology brush is retracted into the non-circular lumen, its bristles compact around the operator for storage within the lumen. A predetermined arrangement of markers at the distal end of the catheter facilitates the measurement of stricture length by direct endoscopic visualization.
67 Citations
21 Claims
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1. Cytology brush apparatus for being introduced over a guidewire into a living body to obtain a cell sample, said apparatus comprising:
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A. flexible catheter means for being positioned in the living body, said catheter means terminating at a distal end, first lumen means for allowing said catheter means to slide over the guidewire and second lumen means for providing a second channel in said catheter means, said first and second lumen means comprising first and second lumens, respectively, that extend through said catheter means and through the distal end thereof, B. cytology brush means for obtaining a cell sample from the living body wherein said cytology brush means is independent of said first and second lumens, operator means extending through said second lumen, C. for supporting said cytology brush means, said operator means including manipulation means for enabling said cytology brush means to be extended beyond the distal end of said catheter means from said second lumen and to be retracted into said second lumen of said catheter means independently of the guidewire disposed in said first lumen to obtain the cell sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Apparatus for obtaining a cell sample from a living body and for being used in conjunction with an endoscope with a working channel and a guidewire extending through the working channel, said apparatus comprising:
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A. flexible catheter means for being positioned in the body over the guidewire, said catheter means terminating at a distal end, first lumen means for allowing said catheter means to slide over the guidewire in the working channel and second lumen means, parallel and spaced from said first lumen means, for providing a second channel in said catheter means, said first and second lumen means comprising first and second lumens, respectively, that extend through said catheter means and through the distal end thereof, B. cytology brush means for obtaining a cell sample from the living body wherein said cytology brush means is independent of said first and second lumens, C. operator means extending through said second lumen, for supporting said cytology brush means adjacent the distal end of said catheter means, said operator means including manipulation means at the other end for enabling said cytology brush means to be extended beyond the distal end of said catheter means from said second lumen and to be retracted into the distal end of said catheter means independently of the guidewire disposed in said first lumen to obtain the cell sample. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification