A medication injection method and related device with a hollow drill bit for delivery of anesthetic or other medication through the hollow drill bit are disclosed. The device preferably includes a hollow drill bit, a disposable fluid dispenser, a handpiece, a handle, and a foot control pedal. The device...http://www.google.es/patents/US5927976?utm_source=gb-gplus-sharePatente US5927976 - Medication injection device and method
