Stones in the gall-bladder should be removed by operation, as, if left, there is a great risk of their trying to escape with the bile into the intestine and thus causing a blockage of the common bile-duct, and perhaps a fatal leakage of bile into the peritoneum through a perforating ulcer of the duct.
An attempt should be made to see whether the fish is defecating, in case the problem is being caused by an intestinal blockage.
At the end of a short, wide traverse we came to a boulder blockage.
Chapter 17 A few pages are missing with more details of Michael Christy's efforts to remove the blockage from the pipe.
Don't ignore persistent catheter blockage, it should be investigated.