Hydronephrosis refers to the swelling of the kidney caused by the collection of urine.
Hydronephrosis refers to the swelling of the kidney caused by the collection of urine. Surgery would be recommended only in the most severe cases. The goal of the surgery is to reduce swelling and pressure in the kidney by establishing a free flow of the urine. The most common surgical procedure used for the treatment of hydronephrosis is pyeloplasty. Pyeloplasty repairs the most common type of blockage, that is, the blockage at the point where the kidney joins the ureter (ureteropelvic junction blockage). It removes the narrowed or obstructed part of the tube connecting the kidney to the bladder (ureter) and reconnects the healthy portion to the kidney’s drainage system. The surgeon may perform pyeloplasty in:
- Traditional or open incision method
- Robot-assisted pyeloplasty
- Laparoscopic pyeloplasty
What is hydronephrosis?
Hydronephrosis involves the collection of urine in the kidney due to incomplete emptying of the urinary tract. This results in swelling and obstruction of the kidney. The swelling or obstruction can occur at:
- Opening of the kidneys into the ureters
- The ureters
- The bladder
- The urethra
Hydronephrosis may be of two types:
- Unilateral hydronephrosis (only one kidney is affected)
- Bilateral hydronephrosis (both the kidneys are affected)
Hydronephrosis, if left untreated, can lead to kidney failure.
What causes hydronephrosis?
The most common causes of hydronephrosis include:
- Kidney stones
- Tumors in the bladder or prostate gland
- Benign prostatic hyperplasia (enlargement of the prostate gland causing pressure in the urethra)
- Blood clots in the kidney or ureter
- Strictures (narrowing of the urinary tract)
- Nerve or muscle problems in the kidney or ureters
- Urinary retention
- Vesicoureteral reflux (a condition where urine flows backward from the bladder to the ureter)
- Ureterocele (a condition where the lower part of the ureter may protrude into the bladder)
- Ureteropelvic junction obstruction (blockage at the point where the kidney joins the ureter)
- Ureterovesical junction obstruction (blockage at the point where the ureter joins the bladder)
- Posterior urethral valves (a congenital condition in which there are abnormal flaps of tissue in the urethra)
- Urethral cancer
In women, hydronephrosis may occur as a result of:
What are the symptoms of hydronephrosis?
Hydronephrosis generally doesn’t cause any symptoms. If symptoms occur, they include:
- Blood in the urine
- Weakness or malaise
- Fever due to a urinary tract infection
- Chest pain
- Shortness of breath
- Leg swelling
- Sudden or intense pain in the back or side of the abdomen
- Cloudy urine
- Painful urination
In the case of electrolyte abnormalities, it may lead to:
How is hydronephrosis diagnosed?
The surgeon takes the history of the patient. They may also ask you to undergo specific tests, which include:
What is the treatment for hydronephrosis?
Acute or sudden hydronephrosis can be treated using a stent or soft tube (nephrostomy tube). The stent is inserted through the skin (percutaneously) into the kidney to drain off the urine. Treatment options for kidney or ureteral stones include:
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