CHICAGO — Trendy wheeled sneakers that let kids zip down sidewalks, across playgrounds and through mall crowds could also send them rolling into emergency rooms on a stretcher, say doctors who blame a rash of injuries on the international craze.

It's called "heeling," named after Heelys, the most popular brand. They're sold in 70 countries and are so hot that their Carrollton, Texas, maker, Heelys Inc., recently landed atop BusinessWeek's annual list of fastest-growing companies.

But doctors from Ireland to Singapore have reported treating broken wrists, arms and ankles; dislocated elbows and even cracked skulls in children injured while wearing roller shoes.

Over a 10-week period last summer, 67 children were treated for injuries from Heelys or strap-on wheels called Street Gliders at Temple Street Children's University Hospital in Dublin, Ireland, according to a report in the June edition of Pediatrics.

From September 2005 through December 2006, one death and at least 64 roller-shoe injuries were reported to the U.S. Consumer Product Safety Commission, a spokesman said last week.

And doctors in Singapore reported last year that 37 children had been treated for similar injuries at a hospital there during a seven-month period in 2004. None was wearing protective gear.

The American Academy of Orthopaedic Surgeons, based in Rosemont, Ill., this week is issuing new safety advice that recommends helmets, wrist protectors and knee and elbow pads for kids who wear wheeled shoes.

"As these shoes are sold in department stores, parents buying them may develop a false sense of security — that they are like any other shoe," said Dr. James Beaty, academy president and a pediatric orthopedic surgeon in Memphis.

Heelys and their knockoffs look like gym shoes, but with wheel sockets in each heel. They can be used for walking, but the wheels pop out when users shift their weight to their heels.

Balancing on the wheels can be tricky, especially for novices. In the Irish study, most injuries were in new users and occurred when kids fell backward while trying to transfer their body weight.

Dr. Leon Benson of Evanston Northwestern Healthcare in Evanston, Ill., recalled treating a 9-year-old girl who'd had her Heelys for just a week when she fell and broke both wrists.

Nine-year-old Noah Woelfel of Davidsonville, Md., wasn't a novice but still tripped and fell, breaking several fingers and wrist bones in his right hand last year.

"All it took was a tiny piece of gravel in the driveway that went up in the wheel and stopped him cold," said his mother, Nancy. "He required surgery and pins, and he was six weeks without using his hand, right at the beginning of school."