Buenos Aires offering of museums is very surprising. Today I found out there is an Anesthesia Museum in Caballito. Guided tours are offered Monday to Friday, 3PM to 5 PM and advanced booking is required.
You can also browse the Museum's catalogue online here. This is an overview of what is on display.
https://www.google.com/maps/place/Museo+Anestesiológico+y+Biblioteca+Histórica/@-34.6173794,-58.4509603,15z/data=!4m2!3m1!1s0x0:0xd4510a240efb1618?sa=X&ved=0ahUKEwjY76zo96DcAhUptlkKHYbvAToQ_BIIeDAM