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I use both catheters (from Boston and Cook). In my experience, the Mac-Loc catheter slides easier along the track, the 0.018 guidewire (included in the set) doesn't kink, but the locking arm is quite hard to be pushed down. The major disadvantage of Boston's nephrostomy set is that the dilator can be easier teared on the tip while passing through tissues. On the other hand, the Chiba needle included on Boston's set is better visualized on ultrasound than the one of Cook's set.

Arm, Do you have any of your own pics of the Boston catheter that you could post ? Also in what way is the locking device better ? thanks.