Ketamine Versus Midazolam for Prehospital Agitation
Study Details
Study Description
Brief Summary
This research study is being done to figure out the best approach to treatment of pre-hospital agitation. It will compare two tiered dosing treatment protocols, one ketamine-based and one midazolam-based. Agitation is a state of extreme emotional disturbance where patients can become physically aggressive or violent, endangering themselves and those who are caring for them. Often chemical substances or severe mental illness are involved in this level of agitation. Specifically, the investigators are interested in studying agitation that is treated in the prehospital setting by paramedics. This study's hypothesis is a ketamine-based protocol will achieve a faster time to adequate sedation than a midazolam-based protocol for treatment of agitation in the prehospital environment. This study will observe the natural history of an emergency medical services standard operating procedure change from a ketamine-based protocol to a midazolam-based protocol.
Condition or Disease | Intervention/Treatment | Phase |
---|---|---|
|
Study Design
Arms and Interventions
Arm | Intervention/Treatment |
---|---|
Ketamine-based Protocol The first 6 month period of the study will employ a ketamine-based protocol for prehospital agitation. There will be a tiered dosing protocol based on degree of agitation. |
Other: Ketamine-based protocol
For profoundly agitated (physically violent) patients, intramuscular ketamine 5 mg/kg will be administered first line. For severely agitated patients, intramuscular ketamine 3 mg/kg will be administered first line.
|
Midazolam-based Protocol The second 6 month period of the study will employ a midazolam-based protocol for prehospital agitation. There will again be a tiered dosing protocol based on degree of agitation. |
Other: Midazolam-based protocol
For profoundly agitated patients, intramuscular midazolam 15 mg will be administered. For severely agitated patients, intramuscular midazolam 5 mg will be administered.
|
Outcome Measures
Primary Outcome Measures
- Time from injection of drug to adequate sedation, defined as a score of +1 or less on the AMSS [2 hours]
The Altered Mental Status Scale (AMSS) is an integral ordinal scale evaluating both agitation and sedation with scores from -4 to +4. It was developed at our institution and has been internally and externally validated. This scale is a modified version of the Behavioral Activity Rating Scale with additional data points from the Observer's Assessment of Alertness Scale. Effectiveness of sedation will be defined as an AMSS score less than or equal to +1. AMSS will be determined by the treating paramedic, who will undergo training as a research associate prior to commencement of the study. Participants will be followed for the duration of agitation, an expected average of 2 hours.
Secondary Outcome Measures
- Number of participants intubated [2 hours]
Participants will be followed for the duration of agitation, an expected average of 2 hours. Enrolling paramedics or research associates in the Emergency Department will record if the patient is intubated.
- Number of participants experiencing hypersalivation [2 hours]
Participants will be followed for the duration of agitation, an expected average of 2 hours. Enrolling paramedics or research associates in the Emergency Department will record if the patient experiences hypersalivation.
- Number of participants experiencing apnea [2 hours]
Participants will be followed for the duration of agitation, an expected average of 2 hours. Enrolling paramedics or research associates in the Emergency Department will record if the patient experiences apnea, defined as 6 seconds of absent EtCO2 waveform.
- Number of participants experiencing nausea/vomiting [2 hours]
Participants will be followed for the duration of agitation, an expected average of 2 hours. Enrolling paramedics or research associates in the Emergency Department will record if the patient experiences nausea/vomiting
- Number of participants experiencing laryngospasm [2 hours]
Participants will be followed for the duration of agitation, an expected average of 2 hours. Enrolling paramedics or research associates in the Emergency Department will record if laryngospasm occurs.
- Number of participants needing rescue sedation [2 hours]
Participants will be followed for the duration of agitation, an expected average of 2 hours. Enrolling paramedics or research associates in the Emergency Department will record if additional sedatives are needed in the prehospital or ED environment.
Eligibility Criteria
Criteria
Inclusion Criteria:
-
Age 18 or older
-
Severe agitation (AMSS +2 or +3) or profound agitation (AMSS +4) requiring chemical sedation
-
Transport to Hennepin County Medical Center
Exclusion Criteria:
-
Obviously gravid women
-
Patients known or suspected to be less than 18 years of age
-
Patients in which stopwatch activation, for safety reasons, is unable to occur
Contacts and Locations
Locations
Site | City | State | Country | Postal Code | |
---|---|---|---|---|---|
1 | Hennepin County Medical Center | Minneapolis | Minnesota | United States | 55415 |
Sponsors and Collaborators
- Hennepin Healthcare Research Institute
Investigators
None specified.Study Documents (Full-Text)
None provided.More Information
Publications
- Buckland DM, Crowe RP, Cash RE, Gondek S, Maluso P, Sirajuddin S, Smith ER, Dangerfield P, Shapiro G, Wanka C, Panchal AR, Sarani B. Ketamine in the Prehospital Environment: A National Survey of Paramedics in the United States. Prehosp Disaster Med. 2018 Feb;33(1):23-28. doi: 10.1017/S1049023X17007142. Epub 2017 Dec 21.
- Burnett AM, Peterson BK, Stellpflug SJ, Engebretsen KM, Glasrud KJ, Marks J, Frascone RJ. The association between ketamine given for prehospital chemical restraint with intubation and hospital admission. Am J Emerg Med. 2015 Jan;33(1):76-9. doi: 10.1016/j.ajem.2014.10.016. Epub 2014 Oct 22.
- Cole JB, Driver BE, Klein LR, Moore JC, Nystrom PC, Ho JD. In reply: Ketamine is an important therapy for prehospital agitation - Its exact role and side effect profile are still undefined. Am J Emerg Med. 2018 Mar;36(3):502-503. doi: 10.1016/j.ajem.2017.12.014. Epub 2017 Dec 7.
- Cole JB, Klein LR, Nystrom PC, Moore JC, Driver BE, Fryza BJ, Harrington J, Ho JD. A prospective study of ketamine as primary therapy for prehospital profound agitation. Am J Emerg Med. 2018 May;36(5):789-796. doi: 10.1016/j.ajem.2017.10.022. Epub 2017 Oct 7.
- Cole JB, Moore JC, Nystrom PC, Orozco BS, Stellpflug SJ, Kornas RL, Fryza BJ, Steinberg LW, O'Brien-Lambert A, Bache-Wiig P, Engebretsen KM, Ho JD. A prospective study of ketamine versus haloperidol for severe prehospital agitation. Clin Toxicol (Phila). 2016 Aug;54(7):556-62. doi: 10.1080/15563650.2016.1177652. Epub 2016 Apr 22.
- Cong ML, Humble I. A Ketamine Protocol and Intubation Rates for Psychiatric Air Medical Retrieval. Air Med J. 2015 Nov-Dec;34(6):357-9. doi: 10.1016/j.amj.2015.07.007.
- Gonin P, Beysard N, Yersin B, Carron PN. Excited Delirium: A Systematic Review. Acad Emerg Med. 2018 May;25(5):552-565. doi: 10.1111/acem.13330. Epub 2017 Nov 27.
- Hick JL, Ho JD. Ketamine chemical restraint to facilitate rescue of a combative "jumper". Prehosp Emerg Care. 2005 Jan-Mar;9(1):85-9.
- Ho JD, Smith SW, Nystrom PC, Dawes DM, Orozco BS, Cole JB, Heegaard WG. Successful management of excited delirium syndrome with prehospital ketamine: two case examples. Prehosp Emerg Care. 2013 Apr-Jun;17(2):274-9. doi: 10.3109/10903127.2012.729129. Epub 2012 Dec 11.
- Hollis GJ, Keene TM, Ardlie RM, Caldicott DG, Stapleton SG. Prehospital ketamine use by paramedics in the Australian Capital Territory: A 12 month retrospective analysis. Emerg Med Australas. 2017 Feb;29(1):89-95. doi: 10.1111/1742-6723.12685. Epub 2016 Oct 3.
- Isbister GK, Calver LA, Page CB, Stokes B, Bryant JL, Downes MA. Randomized controlled trial of intramuscular droperidol versus midazolam for violence and acute behavioral disturbance: the DORM study. Ann Emerg Med. 2010 Oct;56(4):392-401.e1. doi: 10.1016/j.annemergmed.2010.05.037.
- Isenberg DL, Jacobs D. Prehospital Agitation and Sedation Trial (PhAST): A Randomized Control Trial of Intramuscular Haloperidol versus Intramuscular Midazolam for the Sedation of the Agitated or Violent Patient in the Prehospital Environment. Prehosp Disaster Med. 2015 Oct;30(5):491-5. doi: 10.1017/S1049023X15004999. Epub 2015 Sep 1.
- Keseg D, Cortez E, Rund D, Caterino J. The Use of Prehospital Ketamine for Control of Agitation in a Metropolitan Firefighter-based EMS System. Prehosp Emerg Care. 2015 January-March;19(1):110-115. Epub 2014 Aug 25.
- Linder LM, Ross CA, Weant KA. Ketamine for the Acute Management of Excited Delirium and Agitation in the Prehospital Setting. Pharmacotherapy. 2018 Jan;38(1):139-151. doi: 10.1002/phar.2060. Epub 2017 Dec 22. Review.
- Martel M, Miner J, Fringer R, Sufka K, Miamen A, Ho J, Clinton J, Biros M. Discontinuation of droperidol for the control of acutely agitated out-of-hospital patients. Prehosp Emerg Care. 2005 Jan-Mar;9(1):44-8.
- Martel M, Sterzinger A, Miner J, Clinton J, Biros M. Management of acute undifferentiated agitation in the emergency department: a randomized double-blind trial of droperidol, ziprasidone, and midazolam. Acad Emerg Med. 2005 Dec;12(12):1167-72. Epub 2005 Nov 10. Erratum in: Acad Emerg Med. 2006 Feb;13(2):233.
- Melamed E, Oron Y, Ben-Avraham R, Blumenfeld A, Lin G. The combative multitrauma patient: a protocol for prehospital management. Eur J Emerg Med. 2007 Oct;14(5):265-8.
- Miner JR. Ketamine is a good first-line option for severely agitated patients in the prehospital environment. Am J Emerg Med. 2018 Mar;36(3):501-502. doi: 10.1016/j.ajem.2017.12.015. Epub 2017 Dec 7.
- Olives TD, Nystrom PC, Cole JB, Dodd KW, Ho JD. Intubation of Profoundly Agitated Patients Treated with Prehospital Ketamine. Prehosp Disaster Med. 2016 Dec;31(6):593-602. Epub 2016 Sep 19.
- Page CB, Parker LE, Rashford SJ, Bosley E, Isoardi KZ, Williamson FE, Isbister GK. A Prospective Before and After Study of Droperidol for Prehospital Acute Behavioral Disturbance. Prehosp Emerg Care. 2018 Nov-Dec;22(6):713-721. doi: 10.1080/10903127.2018.1445329. Epub 2018 Mar 20.
- Parsch CS, Boonstra A, Teubner D, Emmerton W, McKenny B, Ellis DY. Ketamine reduces the need for intubation in patients with acute severe mental illness and agitation requiring transport to definitive care: An observational study. Emerg Med Australas. 2017 Jun;29(3):291-296. doi: 10.1111/1742-6723.12763. Epub 2017 Mar 20.
- Scaggs TR, Glass DM, Hutchcraft MG, Weir WB. Prehospital Ketamine is a Safe and Effective Treatment for Excited Delirium in a Community Hospital Based EMS System. Prehosp Disaster Med. 2016 Oct;31(5):563-9. doi: 10.1017/S1049023X16000662. Epub 2016 Aug 12.
- Scheppke KA, Braghiroli J, Shalaby M, Chait R. Prehospital use of i.m. ketamine for sedation of violent and agitated patients. West J Emerg Med. 2014 Nov;15(7):736-41. doi: 10.5811/westjem.2014.9.23229. Epub 2014 Nov 11.
- TREC Collaborative Group. Rapid tranquillisation for agitated patients in emergency psychiatric rooms: a randomised trial of midazolam versus haloperidol plus promethazine. BMJ. 2003 Sep 27;327(7417):708-13.
- HSR #17-4306