Changes
/* The market need */
The number of ureteral stents used in patients with stones 2 cm or less treated with ESWL is significant in spite of the lack scientific evidence in support of this practice. Of 1,029 urologists returning surveys, for patients with renal pelvic stones 10, 15 or 20 rnm treated with ESWL, routine stent placement was preferred by 25.3%, 57.1 % and 87.1 %, respectively. Urologists recommend using ureteroscopy rather than ESWL for distal ureteral calculi 5-1 0 mm.
=== Intellectual property ===
==== Search strategy ====
* Databases searched: US-G, US-A, EP-A, EP-B, WO, JP, DE, GB, FR
* Search scope: Claims
* Years: 1991-July 2008
* Search query: ureter* AND (stent* OR catheter*) AND (*microb* OR *bacter*)
== Phase 2: Deeper Dive - Design History File Review ==
