This was in agreement with Gentle
and Leslies, (2005) who mentioned that outcomes of
ESWL procedure is greatly depend on knowledge by
instructions that should be followed prior, during and
after procedure. Also supported by Al-Ansari et al.
(2006) who conducted a study on 300 patients
undergoing ESWL in Elmansoura university hospital,
and reported that high success rates of ESWL observed
among patients who had high score of knowledge about
ESWL.