Normally, urine decreases in amount and becomes more concentrated at night. Most people can sleep for 6~8 hours through the night without having to pass urine. However, this is not the case for some people suffering from Renal Failure, and they may urinate more at night. What are the cause of this condition?
In normal condition, people urinate 3~4 time per day and can sleep through
the night without being woken with an urge to urinate. Excess urination at
night, or nocturia is the need to get up several times a night to urinate. It is
usually a symptom of another medical condition.
People who are suffering from urinating more at night often get less deep
sleep than they should, and may exhibit sleepiness or exhaustion during the
Why do Renal Failure patients urinate more at night?
Each of the kidneys is make up of about 1 million functioning units known as
nephrons. A nephron consists of a filtering units of tiny blood vessels -
glomerulus, which is attached to a tubule.
When blood enters the glomerulus, it is filtered and the remaining fluid then
passes along the tubule. The main function of renal tubule is to re-absorb the
useful substances and produce the urine.
The reason why Renal Failure patients urinating more at night is because the
kidneys get damaged, especially for the renal tubules are impaired. There is
tubular concentration defects and large solute delivery through the remaining
functional nephrons. Patients will experience the problem of nocturia.
Understanding the causes of urinate more at night for patients with Renal
Failure could help us take corresponding effective treatment. If you experience
nocturia, be sure to talk to your doctor about it and any other symptoms you may
be experiencing, as early detection is the key to effectively treating this