NASHVILLE, Tenn. -- A series of recent medical helicopter crashes in other states has local LifeFlight crews taking a close look at safety measures.

Video: LifeFlight Looks At Safety Procedures

Medical choppers are known for their quick speed and for carrying life-saving equipment that isn't found in a typical ambulance. However, a series of incidents have put these helicopters under close examination.

Last weekend in Arizona, six people were killed when two medical helicopters tried to land at the same time. In addition, earlier this year, there was a helicopter crash on the roof of a hospital in Michigan.

Crews from Vanderbilt's LifeFlight helicopter team are paying attention to these crashes. Just this week, a team from the Nashville Fire Department visited the rooftop helipad to review its layout and to update the emergency plan.

"We have talked to the people in Michigan. We've learned from what they have learned. Our industry is not an industry that tolerates procrastination. We are doers and we are doers now," said trauma surgeon Dr. John Morris.

The hospital is also reviewing some of its landing procedures and the new addition of some construction cranes.

While Vanderbilt is taking note of these recent cases, they point out it is part of an ongoing emphasis that safety is their No. 1 product. Recently LifeFlight brought in a national speaker who talked about effective communication.

Crew members said there can't be any doubt about how a colleague feels about a particular situation or a decision that has to be made.

Vanderbilt has its own flight communication center that is one of the busiest in the country. It is responsible for 10,000 takeoffs and landings every year.