Hi, Leng27! Do you still have your anatomy and physiology book? Or, a good medical dictionary? Look up urine. Normal urine output should be 1000 to 1500 mL per 24 hours. In your nursing textbook(s) in the section under postoperative complications you should find something telling you that if a patient hasn't voided after about 8 hours you need to be concerned. The reason for that is due to the effects of drugs given during surgery. However, in the scenario you've been given the patient has had some trauma, or injury. What kind of injury is not given. So, when a patient hasn't voided and the clock is ticking you start thinking about why the urine isn't coming out of this patient. Is the pathway for the urine to come out blocked in some way? Are the patient's kidneys even making urine?
Look up the definitions to these conditions: ischuria, oliguria
http://kidney.niddk.nih.gov/kudiseas...s/yoururinary/ - Your urinary system and how it works
http://www.nlm.nih.gov/medlineplus/e...cle/000507.htm - obstructive uropathy
Just how do you get urine out of a bladder? You will find some independent (does not require a doctor's order) and collaborative (requiring a doctor's order) nursing interventions here. (Let me warn you that not all the nursing interventions listed on these sites are appropriate for the situation you've described, so you have to chose the ones that are.):
http://www1.us.elsevierhealth.com/ME...ex.cfm?plan=57
http://www1.us.elsevierhealth.com/Ev...replan_074.php
Here are links to the catheterization procedure for males and females.
http://teach.lanecc.edu/nursingskill...cathFemale.htm
http://teach.lanecc.edu/nursingskills/cath/cathMale.htm