First of all, seal up the larger wound with the stapler, then apply the Zippo and healing salve to all seven wounds. Use the circular saw to proceed to the next section of the operation.
Use the stapler on all three large wounds, then cauterize with the Zippo and heal up with the green good stuff. Use the circular saw to get to the next part.
Remove those nasty shards of glass quickly and pop them in the tray. Now staple up the big wounds. Finally, apply the Zippo and the healing salve.
Nothing tricky here, just heal up the big wound as usual and you'll be taken back to the patient's exterior.
Staple up that wound, cauterize it, apply the salve and you're done.
To get this bonus star, you're going to have to score a minimum of 1800 points. The easiest way to do this is to rack up a massive multiplier, and that means moving quickly, and using each tool efficiently to keep the procedures flowing one after another.
To pick up the final bonus star in this operation, you'll have to complete this more challenging second stage without making any mistakes. Just keep practicing, and use the adrenaline shots if you need to buy yourself a little more time.