The volume of urine passed each time by a normal adult will vary from around 250 - 400mls. This is the same as about 2 cupful's. Most people with normal bladder habits can hold on for 3-4 hours between visits to the toilet. Most younger adults can also go right through the night without the need to pass urine.
Normal urine output in a healthy individual should be between 0.5-1.5 mL/kg/hour, and patients should generally be urinating at least every 6 hours. Oliguria is defined as the production of inadequate volumes of urine (<500 ml/day in adults, <0.5 mL/kg/hour in children, and <1.0 mL/kg/hour in infants).
Urine output of less than 30 mL/hr (roughly 0.5 mL / kg / hour for a 70-kilogram patient) should be considered cause for concern. Recognition of decreased urine output is much more straightforward than recognition of acute kidney injury in the PACU.
On average, it shouldn't take longer than 30 seconds to urinate, Freedland said. “Once you get going and it takes you a minute to empty your bladder, that's a problem.
Call it the other Golden Rule: Scientists have found that all mammals weighing more than 2.2 pounds (a kilogram) empty their full bladders in about 20 seconds.
The average flow rate for females is 15 mL/sec. Ages 14 to 45 -- The average flow rate for males is 21 mL/sec. The average flow rate for females is 18 mL/sec. Ages 46 to 65 -- The average flow rate for males is 12 mL/sec.
A PVR volume of less than 50 mL is considered adequate bladder emptying; in the elderly, between 50 and 100 mL is considered normal. In general, a PVR volume greater than 200 mL is considered abnormal and could be due to incomplete bladder emptying or bladder outlet obstruction.
Oliguria is a medical term for low urine output (how much you pee). In the case of an adult, this means less than 400 milliliters (mL) to 500 mL (around two cups) of urine per 24 hours. The numbers depend on weight in terms of children and infants.
The 'normal' bladder'
Average capacity of the bladder is 300 - 600mls Average number of times we pass urine each day is 4 - 8, plus up to once a night if under 60 years old and twice per night if over 60 years old.
Most adults make at least 500 mL of urine in 24 hours (a little over 2 cups).
If you drink 2 liters of water a day, which is the recommended daily amount, expect to urinate about once every four hours.
An excessive volume of urination for an adult is more than 2.5 liters (about 67 fluid ounces or about 2.6 quarts) of urine per day. However, this can vary depending on how much water you drink and what your total body water is. This problem is different from needing to urinate often.
A healthy human bladder can hold between 400 to 500 milliliters of urine, or about 2 cups, before it reaches capacity. Though a healthy bladder can stretch and accommodate larger volumes of urine, it's important to urinate at regular intervals.
The urinary bladder can store up to 500 ml of urine in women and 700 ml in men.
Normal Results
The normal values range from pH 4.6 to 8.0.
One of the most obvious renal failure symptoms is a decrease of urine. This symptom occurs in 70 percent of cases. Many people with acute kidney failure only create 16 ounces of urine a day (the average adult urinates between 34 to 50 ounces per day).
A urodynamic study of 436 men and women showed that, in both sexes, postvoid residual volume increased and peak flow rate decreased with age. Bladder capacity also diminished with aging.
The bladder never empties completely so some residue is normal. You may find it difficult to start to pass water and that even when you have started; the flow is weak and slow. You might find that you dribble after you have finished passing water.
Urine might be retained if there is an obstruction or stricture (narrowing) in or around the bladder, or when muscles in or around the bladder are weak. Certain types and locations of tumors, certain medications, being dehydrated, or having constipation can also cause urinary retention.
What are normal bladder habits? A healthy bladder can hold one and a half to two cups (300-400mls) of urine (wee) during the day and about four cups (800mls) at night. It is normal to pass urine five or six times a day if you drink between 6-8 glasses of fluid.
It takes your body 9 to 10 hours to produce 2 cups of urine. That's about as long as you can wait and still be in the safe zone without the possibility of damaging your organs. In the worst of circumstances, your bladder may stretch to hold even more than 2 cups of fluid.
Basically, if you time yourself peeing (over a period of time, not just one sitting) and find that you take significantly longer or shorter than 21 seconds, it can indicate that you are holding it in for too long, or not enough.
When maximally dilute, as much as 13% of the filtered water is excreted and the rate of urine production is about 16 mL/min; when maximally concentrated, < 0.5% of filtered water is excreted and urine production is as little as 500 mL/24 h.
Not officially, but Guinness has a record for the most piss ever expelled at once from a human bladder (38.7 pints), but it doesn't have a category for piss distance.