A successful human bladder transplant in the United States is a world first.

 American surgeons have successfully performed a human bladder transplant, the first of its kind in the world, and could be a game-changer for patients suffering from serious bladder disorders.

The patient, Oscar Larrinzar, is a 41-year-old father who has been on dialysis for seven years.

The surgery was conducted in collaboration between two California universities.

One of the universities, UCLA (University of California, Los Angeles), said in a statement that the patient had cancer, which necessitated the removal of a large portion of his bladder years ago, followed by his kidneys.

The statement explained that Larrinzar received a bladder and kidney from the same donor during the approximately eight-hour surgery, which was performed in early May at the Ronald Reagan UCLA Medical Center.

The university noted in its statement that "surgeons first transplanted the kidney, then the bladder, and then connected the kidney to the new bladder using a technique they developed." The statement quoted one of the surgeons, Dr. Nima Nasiri, as saying that the results of the operation were impressive and almost immediate.

"The kidney immediately produced a large amount of urine, and the patient's kidney function improved immediately," he said.

He added, "There was no need for dialysis after the operation, and urine flowed properly into the new bladder."

Inderbir Gill, who co-led the operation, said, "This surgery represents a historic moment in medicine and could transform the treatment of patients with bladder failure."

Previously, bladder transplants were considered extremely complex, particularly due to the difficulty of accessing the area and connecting it to blood vessels.