EMS Response Times from National Database

Apr 14th, 2011 | By | Category: Response Times, Studies

Cardiac Arrest Elapsed Patient Care Times By Agency Type*

A National EMS Database Report

States Submitting Data:
AK 0%, AL 5%, AR 2%, CO 4%, FL 14%, HI 1%, IA 2%, ID 1%, KS 0%, ME 2%, MI 8%, MN 4%, MO 1%, MS 2%, NC 16%, ND 0%, NE 1%, NH 1%, NJ 9%, NM 3%, NV 0%, OK 4%, SC 12%, SD 0%, UT 2%, WV 4% †

Date Range:
Quarter: 1 Year: 2010

Record Selection:
911 Response Time (Unit Notified by Dispatch Time until Unit Arrives at Scene Time) using Lights and Sirens. Cardiac Arrest (E11_01)= “Yes”, Prior/After EMS Arrival

Total Chart Sample:
16,306
of
13,896,517
(total database population)

 

The following table provides added statistical descriptions of the information used to create the chart labeled: Cardiac Arrest Elapsed Patient Care Times By Agency Type.

EMS Organization
Total Events ‡
Patient Care Times
Average
90th Fractile
National
15140
ResponseTime
0:08:04
0:14:00
11151
SceneTime
0:24:09
0:40:00
9519
TransportTime
0:11:31
0:22:00
Volunteer
554
ResponseTime
0:09:57
0:19:00
432
SceneTime
0:27:46
0:55:00
339
TransportTime
0:16:02
0:31:00
Non-Volunteer
12305
ResponseTime
0:07:56
0:14:00
8804
SceneTime
0:23:17
0:37:00
7735
TransportTime
0:11:05
0:21:00
Mixed
2281
ResponseTime
0:08:15
0:15:00
1915
SceneTime
0:27:19
0:51:00
1445
TransportTime
0:12:47
0:25:00
Footnotes:
* Refer to the linked document for detailed specifications associated with this report:
Cardiac Arrest Elapsed Patient Care Times by Organization Type report specifications
† Proportions represent the data contribution of each state to this specific sample. Also, states vary in the inclusion criteria used to populate EMS Data Sets. Please see the NEMSIS website for a description of differences in state EMS database composition.

‡ For the purposes of charting, all elapsed patient care times that were negative, zero, or greater than 24 hours were removed. Overall, the following % of records were excluded from the analysis:

Cardiac Arrest Elapsed Patient Care Times by Organization Type

National EMS Database Report Specification

Purpose

This report describes national EMS elapsed times for several common response intervals among patients presenting with (or experiencing) a cardiac arrest by type of EMS organization.

Definitions

1. Type of EMS Organization: Common EMS organizational types are divided into 3 groups based on reimbursement for EMS treatment rendered. The terms used are general in nature and are for National EMS Database Reports only. Terms do not reflect state or agency terminology. For more descriptive definitions, contact individual participating states or EMS agencies. The groups are divided as follows:

Volunteer: A volunteer agency employs properly trained individuals and operates an emergency response vehicle to or from the scene of an emergency and/or renders emergency medical treatment on a volunteer basis.

Non-Volunteer: A non-volunteer agency employs properly trained individuals and operates an emergency response vehicle to or from the scene of an emergency and/or renders emergency medical treatment and seeks reimbursement for services offered.

Mixed: A mixed agency includes a core of compensated employees who are supported by true volunteer personnel.

2. Average Value: The average is the sum (total amount) of all of the numbers divided by the number of items for a specific measurement.

3. 50% Fractile (Median) Value: The number in the middle of the distribution of numbers. It is the point such that half of the numbers fall below and half above.

4. 90% Fractile Value: The value or measurement at which 90% of all events occur. This is typically used in time measurements to better standardize performance across systems.

5. Lights and Sirens: A lights and sirens, emergent response to or from an EMS event.

6. No Lights and Sirens: A normal traffic speed response (no lights and sirens) to or from an EMS event.

7. Cardiac Arrest Event: Indication of the presence of a cardiac arrest at any time prior to (or after) EMS arrival.

 

Exclusions/Limitations

For the purposes of charting, all elapsed patient care times that were negative, zero, or greater than 24 hours were removed. These records were removed prior to stratification by cardiac arrest events. The actual number of excluded cases will vary based upon the date range specified for each chart (see specific chart footer for number of excluded cases).

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