Delayed Recompression for Decompression Sickness

September 15, 2014 updated by: Assaf-Harofeh Medical Center

Decompression sickness syndrome (DCS) is caused by microbubbles forming in blood vessels or tissues during a reduction in environmental pressure (decompression). Bubbles have mechanical, embolic and biochemical effects with manifestations ranging from none to fatal. By reducing bubble volume and hastening inert gas elimination, recompression therapy with hyperbaric treatment remains the main therapy for DCS. The most common hyperbaric protocol used, is based on US Navy Treatment table 6, started as early as possible after surfacing. The outcome of hyperbaric therapy varies with reported complete resolution in 13%-63% of the patients suffering from severe DCS, and in 73%-100% of the patients with mild-moderate DCS.

The significance of time to recompression is controversial. It has been suggested that early hyperbaric treatment improves the outcome by decreasing bubble size and avoiding further tissue injury. However, in recent studies time to recompression had very little effect on clinical recovery. Moreover, the time beyond which hyperbaric treatment isn't effective has not been determined yet.

The aim of this study was to evaluate the clinical outcome of delayed hyperbaric treatment to divers who referred to tertiary care hospital hyperbaric unit, more than 48 hours after surfacing. The clinical outcome of the delayed hyperbaric treatments was compared to early treatments given at the same hyperbaric unit.

Study Overview

Status

Completed

Conditions

Detailed Description

From January 2000 to February 2014, 204 divers were treated for DCS in the institute of Hyperbaric Medicine, Assaf Harofeh Medical Center, Israel.

The data will be collected retrospectively from medical records and include age, sex, diving experience, maximal depth, DCS possible cause, DCS type, symptoms, time from surfacing to symptoms onset, time from surfacing to recompression, recompression table, additional treatment after the first recompression and treatment outcome.

Statistical analysis will be done using univariant analysis was performed using Spearman's correlation and Chi-Square in categoric variabales, independent t-test in numeric variables. This will be performed in SPSS v.21 software.

Study Type

Observational

Enrollment (Actual)

204

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

  • Israel
      • Zerifin,, Israel, 70300
        • Assaf-Harofeh Medical 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

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Decompression sickness patients treated with hyperbaric recompression

Description

Inclusion Criteria:

  • Decompression sickness after diving
  • Recompression Treatment between 2000-2014 in Assaf HaRofe medical center hyperbaric institute

Exclusion Criteria:

  • Decompression sickness excluded

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

  • Observational Models: Cohort
  • Time Perspectives: Retrospective

Cohorts and Interventions

Group / Cohort
Delayed
Time from surfacing to recompression >=48 hours
Early
Time from surfacing to recompression <48 hours

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Clinical outcome evaluation
Time Frame: 14 days after treatment
Clinical outcome will be reviewed from the medical records. The outcome was evaluated by a hyperbaric physician within 14 days from recompression. The outcome will be scored as complete, partial or no recovery.
14 days after treatment

Collaborators and Investigators

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

Sponsor

Assaf-Harofeh Medical Center

Investigators

  • Study Chair: Shai Efrati, MD, Assaf Harofe Medical Center

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

September 1, 2013

Primary Completion (Actual)

June 1, 2014

Study Completion (Actual)

June 1, 2014

Study Registration Dates

First Submitted

September 10, 2014

First Submitted That Met QC Criteria

September 15, 2014

First Posted (Estimate)

September 17, 2014

Study Record Updates

Last Update Posted (Estimate)

September 17, 2014

Last Update Submitted That Met QC Criteria

September 15, 2014

Last Verified

September 1, 2014

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 134/13

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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