Urethral stenosis, where the urethra is so narrow the urine can’t flow out in large enough volumes Urethral atresia, where the urethra is missing or completely closed, so there is no outlet from the bladder to the amniotic sac Posterior urethral valves, where a thin piece of tissue blocks the urethra There are several types of lower urinary tract obstructions, including:

For example, males are four to five times more likely to develop a less severe form of LUTO known as hydronephrosis, where there is an obstruction in the ureter tube that connects the kidney and bladder. The cause of the birth defect is unknown, but genetics may play a role in some cases. LUTO is rare, occurring in an estimated 2.2 of every 10,000 births. Known as Potter sequence, these malformations are caused by a lack of amniotic fluid. Deformities of the face and extremities.Without adequate fluid, the baby’s lungs may be too small (pulmonary hypoplasia) at birth to support their oxygen needs. The fetus breathes amniotic fluid in and out to help the lungs develop properly. Underdeveloped lungs and breathing difficulties at birth.This is called oligohydramnios (too low) or anhydramnios (no fluid). When the flow of urine is blocked, the fluid in the amniotic sac can significantly decrease or disappear.

Fetal urine is the main component of amniotic fluid. This can cause progressive, permanent damage and the risk of kidney failure. The backup of urine puts pressure on the fetal kidneys. With no way out, the fetal urine overfills the bladder causing it to become enlarged, damaging this thin-walled structure. LUTO is also known as bladder outlet obstruction.Īn obstruction in the lower urinary tract can cause serious complications, including: A lower urinary tract obstruction (LUTO) is a rare birth defect in which the fetus has a blockage in the urethra, the tube that carries urine out of the baby’s bladder and into the amniotic sac.

Que es el luto