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Comparative Evaluation of Stroke Triage Algorithms for Emergency Medical Dispatchers (MeDS)

This study has been withdrawn prior to enrollment.
(The study design was changed to a prospective cohort study due to difficulties in using a randomized approach in an emergency setting)
Information provided by (Responsible Party):
University of California, San Francisco Identifier:
First received: September 13, 2010
Last updated: June 13, 2012
Last verified: June 2012

This study will compare the diagnostic accuracy of Card 28 stroke protocol to Card 28 and Cincinnati Stroke Scale, when used by emergency medical dispatchers to interrogate a 911 call suggestive of stroke.

The authors hypothesize that a combination of Card 28 plus the Cincinnati Stroke Scale (CSS) will improve the diagnostic accuracy of emergency medical dispatchers for stroke.


Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Pilot Prospective Cohort to Determine the Comparative Diagnostic Accuracy of Card 28 to Card 28 and Cincinnati Stroke Scale.

Further study details as provided by University of California, San Francisco:

Enrollment: 0
Study Start Date: May 2010
Study Completion Date: June 2012
Primary Completion Date: June 2012 (Final data collection date for primary outcome measure)

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population
The target study population consists of all 911 callers with symptoms suggestive of stroke in the participating county. Specifically, the accessible population for this study is the group of patients whose 911 calls are answered and interrogated by the emergency medical dispatchers at the County Communication Center, Santa Clara.

Inclusion Criteria:

  1. All 911 calls transferred by local Public Service Answering Points (PSAPs) to the County Communication center of Santa Clara County where the emergency medical dispatchers complete the interrogation using MPDS protocols.
  2. All 911 calls received directly at the County Communication center of Santa Clara County where emergency medical dispatchers complete the interrogation using the MPDS protocols.
  3. All 911 calls received from subjects (patient) aged > 18 years or second party calls (by-stander or family who are in close proximity to the patient and can administer the tool) by subjects > 18 years of age.

Exclusion Criteria:

  1. All calls that require immediate response (ECHO level determinant for life threatening conditions) and emergency medical dispatchers cannot complete Card 28
  2. Calls answered by emergency medical dispatchers who have not completed training on the use of Cincinnati Stroke Scale.
  3. Calls originating from the cities of Palo Alto, Mountain View, Sunnyvale, Santa Clara, and San Jose that are not interrogated by the County Communication Center for Santa Clara County.
  4. 911 calls with no available outcomes in the final discharge database.

  Contacts and Locations
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Please refer to this study by its identifier: NCT01202318

United States, California
Alameda County
Alameda, California, United States
Sponsors and Collaborators
University of California, San Francisco
Principal Investigator: Prasanthi Govindarajan, MBBS, MAS University of California, San Francisco
  More Information

Responsible Party: University of California, San Francisco Identifier: NCT01202318     History of Changes
Other Study ID Numbers: H60373-35400-01
Study First Received: September 13, 2010
Last Updated: June 13, 2012

Keywords provided by University of California, San Francisco:
Cerebrovascular Accident

Additional relevant MeSH terms:
Cerebrovascular Disorders
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Vascular Diseases
Cardiovascular Diseases processed this record on May 24, 2017