I had somewhere between 16-20 ultrasounds. I had a high risk pregnancy and they were keeping a close eye on the baby. Each ultrasound cost around $700 plus the costs from the doctor and lab for reading the results. Luckily our insurance picked up the cost after we paid $2500 out of pocket. Even with all that expense my daughter was totally worth it and is perfect.
Part of the difficulty in answering this question is that depth and cause of coma may vary, and memory is impaired during coma so people might hear but not be able to recall what they hear. In brief: Hard to know. It is hard to know if people in a coma can hear you.
Top 10 Celebrities Who Survived a Coma. A coma is a state of unconsciousness, lasting more than 6 hours in which a person cannot be awakened, fails to respond to painful stimuli, light, sound, and lacks a normal sleep-wake cycle. A coma is caused by injury to either the cerebral cortex or the reticular activating system.