It's possible the seizures are caused by Epilepsy. If Epilepsy is ruled out and you have a diagnosis of sleep apnea, then yes - short drops in blood oxygen levels can cause seizures. In epileptics, apnea can increase the number of seizures. This quote is from wikipedia: Short of death, drops in blood oxygen may trigger seizures- even in the absence of epilepsy.
The best thing to do is to talk to your doctor. I don't know where in the process you are. Your doctor will probably refer you to a neurologist for the seizues and a pulmonologist/sleep specialist for the apnea.
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