Even with the risks of an operation factored in, bariatric surgery can be a lifesaver, particularly for people who are very obese.

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Any one of them could be a lifesaver.

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The cello turned out to be a lifesaver.

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In the classroom, this can be a lifesaver.

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The legislation could be a lifesaver.

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That realization may be a lifesaver.

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This proved to be a lifesaver.

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For those patients, this drug could be "a potential lifesaver, " says John Kastelein, a professor of medicine at the University of Amsterdam who is running Isis's current trials.

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That would be a major convenience for individuals and a lifesaver for large network operators.

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This powerful accessory is a lifesaver in locations where finding multiple wall outlets can be a challenge, and where charging your MacBook and iPad quickly is mission-critical to your next meeting or presentation.

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