Postoperative Hyponatremia - Are There Gender Differences?

June 11, 2013 updated by: Vibeke Moen, Karolinska University Hospital
The proposed study will focus on anesthesia and anesthesia-induced hypotension as a possible cause for postoperative fluid retention and hyponatremia, and investigate gender differences in this response.

Study Overview

Status

Status

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

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

30 healthy women and 30 healthy men, who are scheduled for surgery of the middle ear or parotic gland are included in the study. Within each gender group, the subjects are randomized to receive perioperative intravenous fluid regimes either based on body weight or lean body mass (LBM). The surgery lasts for at least 3 hours, the intervention period (fluid administration according to protocol) will last 10-12 hours, the study period will be 20-24 hours. Blood samples for analysis of plasma sodium, potassium, glucose and osmolality are collected preoperatively and the following morning together with analysis of urine produced during the study period.

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.
Interventional

Enrollment (Anticipated)

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.
60

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

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

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

Study Locations

  • Sweden
      • Kalmar, Sweden, 39185
        • Not yet recruiting
        • Dept of Anaesthesia and Intensive Care, Kalmar County Hospital
        • Contact:
        • Principal Investigator:
          • Vibeke Moen, MD
      • Linkoping, Sweden, 58185
        • Recruiting
        • Department of Anaesthesia and Operation
        • Contact:
        • Sub-Investigator:
          • Patrik Johansson, MD
        • Principal Investigator:
          • Christina Eintrei, PhD
      • Stockholm, Sweden, 14186
        • Recruiting
        • Department of Anesthesia and Intensive Care, Karolinska University Hospital Huddinge
        • Contact:
        • Principal Investigator:
          • Selma Najeeb, MD
      • Stockholm, Sweden, 171 76
        • Recruiting
        • Dept. of Anesthesiology and Intensive Care, Karolinska University Hospital, Solna
        • Principal Investigator:
          • Johan Ullman, MD, PhD
      • Uppsala, Sweden, 75185
        • Terminated
        • Dept of Anaesthesia and Intensive Care, Uppsala University Hospital

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

18 years to 50 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • ASA Physical status I-II
  • Subjects scheduled for otorinolaryngoiatric surgery in general anesthesia of at least 3 hours duration

Exclusion Criteria:

  • BMI less than 18
  • BMI greater than 33
  • Diabetes mellitus requiring medication
  • Treatment with diuretics
  • ACE-inhibitors
  • Angiotensin II antagonists
  • Cortisone
  • Lithium
  • Diseases of the kidney

  • Females:

    • Pregnancy
    • Menopause
    • Endocrine dysfunction influencing menstruation

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

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
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.
Experimental: I
Perioperative fluid management based on body weight
Procedure: Fluid administration
Preoperative: bolus of 10 ml/kg body weight. During operation: 5 ml/kg body weight/hr. Postoperative: 3 ml/kg body weight/hr
Other Names:
  • Fluid administration by body weight
Active Comparator: II
Perioperative fluid management based on Lean Body Mass (LBM)
Procedure: Perioperative fluid management based on Lean Body Mass
Preoperative: bolus of 12 ml/kg LBM. During operation: 6 ml/kg LBM/hr. Postoperative: 3.5 ml/kg LBM/hr
Other Names:
  • Fluid administration by Lean Body Mass

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
Time Frame
Change between preoperative and postoperative plasma sodium concentration
Time Frame: 24 hrs
24 hrs

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.
Karolinska University Hospital

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.
  • Principal Investigator: Johan Ullman, MD., PhD., Dept of Anesthesia and Intensive Care, Karolinska University Hospital, Stockholm,

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

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.
March 1, 2008

Primary Completion (Anticipated)

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.
December 1, 2013

Study Completion (Anticipated)

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.
December 1, 2013

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 10, 2008

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 10, 2008

First Posted (Estimate)

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 17, 2008

Study Record Updates

Last Update Posted (Estimate)

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.
June 12, 2013

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.
June 11, 2013

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.
June 1, 2013

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.
  • NKOISR10003

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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