| 摘要 |
<p>Apparatus (10) 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 (11). One lumen size is sized to accommodate a guidewire (23). A second, parallel lumen (15) has a non-circular cross section and carries a cytology brush (26) at one end that couples through an operator (25) to a manipulator (24) 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 (42) compact around the operator for storage within the lumen. A predetermined arrangement of markers (60-74) at the distal end of the catheter facilitates the measurement of structure length by direct endoscopic visualization.</p> |
