Certain types of tattoos – including those done with yellowor blue ink, or older and bigger tattoos – are harder toremove than others with laser treatment, according to an Italianstudy. Even smaller tattoos done with black ink can take multiple years toerase, and it can be harder to erase tattoos from the skin ofpeople who smoke as well, said researchers whose findings appearedin the Archives of Dermatology. About half of young people who get a tattoo ultimately choose tohave it removed, the researchers said. Laser pulses are used tobreak up tattoo ink, and the tiny ink particles are then removed byimmune cells.
Of 352 people getting a tattoo removed with the so-calledQ-switched laser, just under half had their tattoos successfullyeliminated after 10 sessions, and three-quarters after 15 sessions,according to the study led by Luigi Naldi, from Centro Studi GISEDin Bergamo, Italy. Smokers, as well as people who had their treatment sessions lessthan two months apart, were less likely than others to see theirbody art disappear. Naldi said that because of the laser's reaction with theindividual pigments, yellow and blue inks may change color but notdisappear with treatment. People with those colorful tattoos "should be aware thatremoval of this tattoo may be more difficult and may not besatisfactory," he told Reuters Health.
The effect of smoking could be explained by smoking's impacton the immune system, he added. In another study published with Naldi's in the Archives ofDermatology, US researchers tested a new laser device for tattooremoval that involves a shorter pulse – lasting a picosecond,versus the traditional nanosecond. "With laser treatment for tattoos, no big changes have comeabout in the past 20 years," said Nazanin Saedi, the leadauthor of that study from Thomas Jefferson University inPhiladelphia. The Q-switched laser takes so many treatments, she said, and costsadd up, discouraging many. For her study, 12 out of 15 patients completed at least two tattooremoval sessions with the picosecond laser.
All 12 had their ink atleast 75 percent cleared and were "satisfied" or"extremely satisfied" with the outcome, most after twoto four treatments. Saedi said the company that makes the new device and partiallyfunded her study, Cynosure, is doing clinical trials in hopes ofgetting the laser approved by the Food and Drug Administration. Butfor now, it isn't available outside studies. David Goldberg, a dermatologist who wasn't involved in thestudies, said the number of sessions needed to remove a tattoodeters many. "The number of people getting tattoos continues toincrease… which means, when you look at people 10 to 20 yearsafter that, the number of people seeking removal of that tattoo isalso higher," said Goldberg, head of laser research in thedermatology department at the Mount Sinai School of Medicine in NewYork.
There are still limitations to picosecond lasers, including thatthe machines break down frequently and are very expensive. But he thinks that over the next few years, they will"transform" how tattoo removal is done. For now, people considering a tattoo should make the decision veryseriously. "It takes about a half hour to get a tattoo, but it can takeyears to get it removed," he added. (Reuters).
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