Related Experiment Video
Updated: Jul 10, 2026

Use of the Operant Orofacial Pain Assessment Device (OPAD) to Measure Changes in Nociceptive Behavior
Published on: June 10, 2013
Design of novel assessment techniques for opioid dependent patients
Sushil G Patil1, Timothy J Gale, Clive R Stack
1School of Engineering, University of Tasmania, Sandy Bay, Hobart, Tasmania, Australia. sgpatil@utas.edu.au
Abstract:
Assessment of opioid dependent patients in a replacement program has traditionally relied on conventional methods such as urine testing or face to face examination with a physician. We are introducing new assessment techniques based on pupillometry, reaction time and slurring of speech. The pupillometry test uses a webcam, controlled lighting and customized software to measure pupil parameters. The reaction time test uses a push-button to detect time to respond to a visual stimulus. The slurred speech test involves detection of slurring of a set of individual test words. These three tests will be combined to provide the physician with an objective "sedation index" for patients. These techniques will be used with remote dispensing technology currently under development.
Related Concept Videos
Analgesia and Pain Management
Opioid Analgesics: Synthetic and Semisynthetic Opioids
Opioid Analgesics: Morphine and Other Natural Cogeners
Opioid Receptors: Overview
Drug Abuse and Addiction: Pharmacological Phenomena
Drug Dependence

