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Bladder Defects


Ronald Rabinowitz

, MD, University of Rochester Medical Center;

Jimena Cubillos

, MD, University of Rochester School of Medicine and Dentistry

Reviewed/Revised Aug 2022 | Modified Jul 2023
Topic Resources

A Look Inside the Urinary Tract

A Look Inside the Urinary Tract

Problems with nerves to the bladder (neurogenic bladder Neurogenic Bladder Neurogenic bladder is lack of bladder control because of a nerve problem such as a stroke, spinal cord injury, or tumor. Uncontrollable loss of urine (urinary incontinence) is the primary symptom... read more )

  • Flaccid bladder: The nerve problem makes the bladder muscles limp and weak (flaccid). The bladder cannot contract properly to empty itself, so urine tends to fill up the bladder at low pressure.

  • Spastic bladder: The nerve problems cause the bladder to contract too much (spastic), and urine in the bladder is at high pressure. The bladder is small.

In some children, the bladder is sometimes flaccid and at other times spastic.

If children cannot empty their bladder completely, urine can become stagnant, which increases the risk of urinary tract infections Urinary Tract Infection (UTI) in Children A urinary tract infection is a bacterial infection of the urinary bladder ( cystitis), the kidneys ( pyelonephritis), or both. Urinary tract infections are caused by bacteria. Infants and young... read more (UTIs) or formation of bladder stones Stones in the Urinary Tract Stones (calculi) are hard masses that form in the urinary tract and may cause pain, bleeding, or an infection or block of the flow of urine. Tiny stones may cause no symptoms, but larger stones... read more Stones in the Urinary Tract . Also, the full bladder may overflow, resulting in involuntary release of urine (called urinary incontinence Urinary Incontinence in Children Urinary incontinence is defined as the involuntary release of urine occurring two or more times per month after toilet training has been completed. Incontinence may be present During the day... read more ). If the child's bladder cannot empty completely, the bladder is drained by inserting a thin, flexible tube (catheter) through the urethral opening into the bladder. This process is called catheterization. Catheterization is repeated several times each day because it is better to remove the catheter as soon as the urine has finished draining. This process is called intermittent catheterization. However, sometimes the catheter must be left in all the time.

If catheterization does not work, a surgical procedure called a vesicostomy may be done. In this procedure, doctors make an opening between the abdominal wall and the bladder. Urine drains from the bladder through the opening into a diaper. An alternative to vesicostomy is to create a channel or tunnel between the bladder and the skin. A catheter can be placed in this channel.

If the urine is under high pressure, the urine may flow backward from the bladder into the kidneys (urinary reflux Urinary Reflux Urinary reflux is when urine flows backward from the bladder into the ureter and sometimes the kidney, usually because of a birth defect of the urinary tract. Each kidney continuously filters... read more ). Urinary reflux may cause recurring urinary tract infections, kidney damage, or both. Children who have a small bladder and increased bladder pressure may be given drugs to relax the bladder muscles or may be catheterized. If these measures do not work, doctors may do surgery to help decrease the involuntary release of urine and decrease bladder pressure so the kidneys do not become damaged. Some surgical procedures increase the size of the bladder. However, after surgery, children usually still need catheterization.

The Ureters, Bladder, and Urethra

Failure of the bladder to close properly

A similar disorder involves the connection between the bladder and the bellybutton (umbilicus) that is present when the fetus is first developing. This connection is called the urachus. Normally this connection closes before birth. If this connection remains open (called a patent urachus), urine drains out of the bellybutton.

In both disorders, infants are at risk of urinary tract infections. Doctors do surgery to close the abnormal openings and repair the bladder if needed. Surgery may be done shortly after birth or may be delayed.

Bladder diverticulum

Sometimes children are born with an outpouching (diverticulum) in the wall of the bladder. Urine can stagnate in these diverticula and cause urinary tract infections. Doctors sometimes do surgery to remove the diverticulum and reconstruct the bladder wall.

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