What instrument do you play?
The best way to determine is if you are able to sing the line.
Are you asking about a single note? Or are you asking about continuously playing in general? Register and dynamic play a huge role in the answer.
As a general rule, if you can sing it, a player can play it. Yes there are differences between instruments. As stated, oboists need to learn to exhale before inhaling lest they hyperventilate (a big problem for younger players!). What level are you trying to write for? Young players will expend air faster than an advanced player.
Talk to some players of the instruments if you're not sure. Take a trumpet player to coffee and he will probably tell you a lot of what you need to know.
Perhaps you can post what you want them to be able to do, and someone can tell you if it's doable.
Thank you for your comments, Sojar. You have mentioned the issue of length in my work before and I am working on longer things with new material, but I don't think I will use this as source material. It's kind of old and I wouldn't know what to do to lengthen it. I don't have the interest. I thought it worked as a miniature with a few good ideas.