THURSDAY, March 31, 2022 (HealthDay News) – A noninvasive ultrasound technology can quickly eliminate kidney stones, a preliminary study shows – in what researchers call the first step to a simple and effective treatment. lack of anesthesia for pain problems.
The study showed that the first 19 patients who had kidney stones treated with ultrasound “bursts.” Now, it can completely separate the rocks in 10 minutes.
There has been more research than that, but the experts did not participate in the study that called the first results “happy.” If stable, they say, ultrasound technology could make it easier for patients to treat neck stones.
Kidney stones are common, affecting about 10% of people at some point, according to the National Kidney Foundation.
Most of the time, the stone can pass into the urine without much pain. In other cases – such as the cause of the stone being more severe or the pain being unbearable – care must be taken.
Today, most kidney stones can be treated with a procedure called shock wave lithotripsy. It sends powerful sound waves through the skin that break the rock into small pieces that can be passed.
But there are some shortcomings, says Dr. Mathew Sorenson, of the Washington University School of Medicine in Seattle, is one of the researchers in the innovation.
Tremor can be painful, so it is usually performed in the operating room, with patients under anesthesia, in the United States.
Sorenson and his colleagues are developing another technique called burst wave lithotripsy. They say that the stones can be smoked in a short time, without anesthesia.
The main goal, the researchers say, is to make the procedure available to patients full -time, during an office visit with a urologist – or in the emergency room when patients arrive at great pain.
Unlike a vibrating wave, a burst wave uses “short harmonic bursts” of ultrasound energy, according to the research team. Preliminary research has thought that it can break rocks with the speed of injury, rather than shaking waves.
In the new study, the researchers tested the method of rupture in 19 patients undergoing treatment of kidney stones with a procedure called ureteroscopy. It involves the penetration of a thin space through the urethra, up to the point of the urethra; instruments were used to trap rocks or break them into pieces that could be removed.
Because ureteroscopy requires anesthesia, patients are in training when ultrasound bursts are used, up to 10 minutes.
In all, the researchers found, it was enough for 21 of the 23 rocks. Half of the rocks have 90% of their volume dissolved in pieces no larger than 2 millimeters (mm). And nine rocks (39%) were broken to that degree.
The information is now published on The Journal of Urology.
Two urologists who did not participate in the study called it surprisingly good, considering the length of care (which was chosen to limit the time patients were under anesthesia). .
Cup stones that are broken into 2 mm or smaller are easier to walk on, says Dr. Mantu Gupta, director of the Kidney Stone Center at Mount Sinai, New York City.
Gupta found that the study did not really test the concept of the real world: Using technology without anesthesia. But the group’s first work showed that patients could accept it.
“This is very exciting,” Gupta said, adding that security data is now a good thing.
Some patients have been shown to have low blood pressure, including a small amount of blood in the urine.
Dr. William Roberts, a professor of urology at the University of Michigan, described the process as exciting.
“This is much safer, and much safer than wave lithotripsy,” he said.
It’s not clear if blistering waves are better, but Roberts said if the procedure can be done, in fact, done in a urologist’s office, it’s a great option.
It doesn’t mean that technology will help everyone with keystrokes. Roberts found that while 19 patients were treated, a similar number were included in the study but were not available with ultrasound: Some rocks were found very deep, for example, and obstructed by the ribs or abdomen.
However, Roberts said that while some patients may have access to the procedure, its ability to “simplify” it could be a boon.
But Dr. Joseph Vassalotti, chief medical officer of the National Kidney Foundation, said that while the procedure was “promising,” most patients surveyed had a normal body mass index (BMI), which making it easy to break rocks with a vibrating vibration.
“The low birth weight of obese patients is important not only because obesity is common in the U.S., but also because obesity is the technical limit at work. [ultrasound burst and shock wave therapy]”said Vassalotti.
While previous work has shown that wave motion can be tolerated, patients do not need pain medication afterwards to correct the procedure themselves, Roberts said – although they need to be somewhere. painkillers such as acetaminophen (Tylenol) if walking on the joints is not comfortable.
The research team said it has begun research to test the route to patients who arrive at the emergency room with kidney stones. The technology is licensed to SonoMotion Inc., which is developing a commercial version and conducting its own medical trials.