Early stage of shock urine volume will be reduced, late stage of shock is the most serious thing, there may be oliguria and anuria, oliguria is the urine volume in 24 hours <400ml or <17ml per hour, anuria refers to the total volume of urine per 24 hours <100ml. shock to determine the situation of the volume of urine according to the number of ml to determine, if if you are at home to determine the unclear, it is best to be in the urinal is better to observe. If you can't tell at home, it's better to look inside the urinal. If you are in the hospital, the volume is measured in milliliters. Shock is divided into hypovolemic shock, obstructive shock, cardiogenic shock, there are many kinds of indicators, urine volume is one of them, because of low blood pressure, so there will be a situation of low urine volume.