I'm assuming your husband's bipap is a ventilator type that will recognize central apneas and breathe for him during those episodes? Central apnea (as opposed to obstructive) usually requires a special machine. does
his bipap record treatment data, like how
many apneas he has during the night? Some do, some don't. If his does
, downloading his data could tell if his pressures are resolving the events.
He needs to either have access to data or get another sleep study.