Study: NCT04251013

Intervention type: DEVICE
Group type: ACTIVE_COMPARATOR
Intervention: Biliary brushing with the RX Cytology brush, Boston Scientific
Description: Biliary brushing during ERCP:~* Performing a dozen back and forth movements in the stenosis~* Bile aspiration if possible, by the catheter of the brush for cytological analysis~* The contents of the brush will be spread over 3 blades (numbered) then sectioned and placed in cytolit with the contents of the tubing of the brush flushed with a few cc of cytolit. Each brush in a numbered pot. Blades 1,2 and 3 +/- bile 1 joined to pot n ° 1; blades 4,5 and 6 +/- bile 2 joined to pot 2~  * In the event of technical failure (impossibility of accessing the stenosis with the first or second brush, impossibility of removing the brush), the patient will be considered to have failed for this brush (absence of pathological material brought back)

Intervention type: DEVICE
Group type: ACTIVE_COMPARATOR
Intervention: Biliary brushing with the RX Cytology brush, Boston Scientific
Description: Biliary brushing during ERCP:~* Performing a dozen back and forth movements in the stenosis~* Bile aspiration if possible, by the catheter of the brush for cytological analysis~* The contents of the brush will be spread over 3 blades (numbered) then sectioned and placed in cytolit with the contents of the tubing of the brush flushed with a few cc of cytolit. Each brush in a numbered pot. Blades 1,2 and 3 +/- bile 1 joined to pot n ° 1; blades 4,5 and 6 +/- bile 2 joined to pot 2~  * In the event of technical failure (impossibility of accessing the stenosis with the first or second brush, impossibility of removing the brush), the patient will be considered to have failed for this brush (absence of pathological material brought back)

Intervention type: DEVICE
Group type: ACTIVE_COMPARATOR
Intervention: Biliary brushing with the Infinity® brush, US Endoscopy
Description: Biliary brushing during ERCP:~* Performing a dozen back and forth movements in the stenosis~* Bile aspiration if possible, by the catheter of the brush for cytological analysis~* The contents of the brush will be spread over 3 blades (numbered) then sectioned and placed in cytolit with the contents of the tubing of the brush flushed with a few cc of cytolit. Each brush in a numbered pot. Blades 1,2 and 3 +/- bile 1 joined to pot n ° 1; blades 4,5 and 6 +/- bile 2 joined to pot 2~  * In the event of technical failure (impossibility of accessing the stenosis with the first or second brush, impossibility of removing the brush), the patient will be considered to have failed for this brush (absence of pathological material brought back)

Intervention type: DEVICE
Group type: ACTIVE_COMPARATOR
Intervention: Biliary brushing with the Infinity® brush, US Endoscopy
Description: Biliary brushing during ERCP:~* Performing a dozen back and forth movements in the stenosis~* Bile aspiration if possible, by the catheter of the brush for cytological analysis~* The contents of the brush will be spread over 3 blades (numbered) then sectioned and placed in cytolit with the contents of the tubing of the brush flushed with a few cc of cytolit. Each brush in a numbered pot. Blades 1,2 and 3 +/- bile 1 joined to pot n ° 1; blades 4,5 and 6 +/- bile 2 joined to pot 2~  * In the event of technical failure (impossibility of accessing the stenosis with the first or second brush, impossibility of removing the brush), the patient will be considered to have failed for this brush (absence of pathological material brought back)