Note: This question is based on a very specific senario, therefore not a duplicate of any questions currently on site.
Some brief background: Over a decade ago there were an illegal organization using Electroconvulsive Therapy without anesthesia and muscle relaxant to "cure" internet addicts (mostly teens) in China. Long story short, you enter a room (Room 13) and...suffer things worse than death. The culprit is still at large and have attained polictical status since 2018. This question seeks to recreate and deal with the situation people face in Room 13.
The actual situation:
Place: A normal hospital room with a bed and a electro pulse stimulator (primary tool of torture). There is (assumed) no windows and one locked door that will take at least a kick to break down.
Opponents: 7~8 teens, mostly underfed, possibly with PTSD / Paranoia due to the suffering, assuming that less than 3 people have a martial arts background, but will simultaneously try to take you down and press you on the bed at all costs. You have the option of fighting with your back against 1~2 walls at once to decrease the total number of attackers coming at you at once.
Primary objective: To escape through the door or hold an important adult (head of conspiracy) as hostage. Killing him would also be an option since it is legally justified under the circumstances, but will possibly lessen chances of escape.
Secondary objective: To gather information and evidence useful in legal prosecution of the adult above, only possible when all opponents are incapacitated.
Are there any tactics to maximize success of reaching the primary objective? What fighting strategy should one use in this situation?
One last note: Your life will be at risk by that time since the electric current would be beyond safety limits, so legal consequences could be considered later.