Drowning Incidents Treated by the Danish SAR Helicopters (DROWN_SAR)

December 1, 2024 updated by: Niklas Breindahl, Prehospital Center, Region Zealand

Incidence and Characteristics of Drowning Patients at Sea Treated by the Royal Danish Air Force's Search And Rescue Helicopters From 2014-2023: a Nationwide Registry-based Study

Improving oxygenation and ventilation in drowning patients early in the field is critical and may be lifesaving. This may be achieved by helicopter emergency medical services (HEMS) such as the Danish Air Ambulance, or the Royal Danish Air Force's Search And Rescue (SAR) helicopters. The SAR operates in all weather conditions and is equipped with a hoist system, able to hoist patients from the sea or small ships without helipads. This study aimed to estimate the incidence of drowning missions attended by the Royal Danish Air Force's SAR helicopter and describe patient characteristics and prehospital interventions.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

The national Danish Drowning Cohort contains data on all fatal and non-fatal drowning patients treated by the Emergency Medical Services. However, data on drowning patients treated by the SAR helicopters is reported in a separate system.

The population of drowning patients treated by the SAR helicopters has never been described, thus contributing to the potential underreporting of the most critically ill drowning patients in Denmark. Given the rarity of drowning, registry-based studies are needed to provide patient characteristics and evaluate critical care interventions performed on this group of patients.

This study aims to identify and describe a national cohort of drowning patients at sea treated by the Royal Danish Air Force's SAR helicopters from 2014 to 2023.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
247

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Denmark
    • Region Zealand
      • Næstved, Region Zealand, Denmark, 4700
        • Prehospital Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Drowning patients will be identified through manual validation of the Royal Danish Air Force's SAR helicopter's records using the internationally accepted definitions of fatal and non-fatal drowning incidents.

Drowning was defined by the WHO in 2002 as "the process of experiencing respiratory impairment from submersion or immersion in liquid".

If the incident involved submersion or immersion, but the patient did not experience respiratory impairment, the incident was categorised as a water rescue.

Description

Inclusion Criteria:

  • Patients treated by the Danish SAR helicopters AND
  • Drowning as defined by the WHO (the process of experiencing respiratory impairment from submersion or immersion in liquid)

Exclusion Criteria:

  • Patients who have not been immersed or submersed.
  • Duplets.
  • Interhospital transfers.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Fatal drowning
Prehospital mortality following a drowning incident, defined as a dichotomous variable (dead or alive) evaluated at case termination. Patients admitted to the hospital with cardiac arrest were considered fatal drowning incidents in this study.
Other: Drowning incident
Patients categorized as drowning have been experiencing respiratory impairment from submersion or immersion in liquid and needing rescue by the Royal Danish Air Force's Search and Rescue (SAR) helicopters.
Non-fatal drowning
Drowning incidents where the patient had spontaneous circulation at hospital admission.
Other: Drowning incident
Patients categorized as drowning have been experiencing respiratory impairment from submersion or immersion in liquid and needing rescue by the Royal Danish Air Force's Search and Rescue (SAR) helicopters.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Annual incidence of drowning treated by the Danish SAR helicopters from 2014-2023
Time Frame: 1 year
The incidence will be reported as the annual number of cases.
1 year
Annual incidence rate of drowning treated by the Danish SAR helicopters from 2014-2023
Time Frame: 1 year
The incidence rate as the annual number of cases per 100,000 person-years.
1 year

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Spatial distribution of drowning patients treated by the Danish SAR helicopters from 2014-2023
Time Frame: The map will display all drowning incidents treated by the Danish SAR helicopters from 2014-2023.
The spatial distribution of drowning incidents will be displayed on a map of Denmark, with each case presented with a single entry based on the geographical coordinates of the incident.
The map will display all drowning incidents treated by the Danish SAR helicopters from 2014-2023.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Prehospital Center, Region Zealand

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Danish Defence

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Helle Collatz Christensen, Ass. Prof., Prehospital Center, Region Zealand

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
January 1, 2014

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
January 31, 2024

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
October 31, 2024

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
March 7, 2024

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 13, 2024

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
March 20, 2024

Study Record Updates

Last Update Posted (Estimated)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
December 4, 2024

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 1, 2024

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
December 1, 2024

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • DROWN_SAR

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

The datasets used and/or analysed during the current study are available from the corresponding author upon reasonable request.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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