Kidney stone disease One ureteroscopic technique involves the placement of a ureteral stent (a small tube extending from the bladder, up the ureter and into the kidney) to provide immediate relief of an obstructed kidney. Stent placement can be useful for saving a kidney at risk for postrenal acute renal failure due to the increased hydrostatic pressure, swelling and infection (pyelonephritis and pyonephrosis) caused by an obstructing stone. Ureteral stents vary in length from and most have a shape commonly referred to as a "double-J" or "double pigtail", because of the curl at both ends. They are designed to allow urine to flow
Bladder pipe form, and did not become merged with the bagpipe. Bladder pipe The Bladder pipe ("German": Platerspiel or Blaterpfeife) is a medieval simplified bagpipe, consisting of an insufflation tube (blow pipe), a bladder (bag) and a chanter; sounded by a double reed, which is fitted into a reed seat at the top of the chanter. The reed, inside the inflated bladder, is sounded continuously, and cannot be tongued. Some bladder pipes were made with a single drone pipe, and reproductions are similar to a loud, continuous crumhorn. The chanter has an outside tenon, at the top, near the reed, which fits