To me, it sounds like medical neglect if the student has a history of food lodging in the throat and the school lacks the equipment needed, per a doctor letter that they have a copy of, to deal with this. There are agencies that will look into medical neglect in situations like this. Your state does offer facilitators for IEP meeting where they might help in getting you & the school on the same page. Would the school agree to this? https://www.cadreworks.org/cadre-continuum/stage-iii-conflict/facilitation/facilitated-iep-team-meeting-massachusetts and https://www.mass.gov/info-details/facilitators-for-iep-team-meetings
Not sure if MA has a consult line that parents & advocates can call to help resolve situations like this. I did find this group located in Boston - they might be able to offer guidance: https://www.massadvocates.org/ I also found this: https://www.mass.gov/info-details/education-resources