Based on its being sort of suction-lite, yes, if the PALS swallows well enough not to aspirate excess fluid/should it cause irritation.
But if you have an olive tip attachment for your existing suction machine (if you have one), you might try that on the lowest setting, first.
A baby nasal aspirator might be a first step since it isn't "powered" and therefore has the highest safety factor of the alternatives above.