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Pulse Pressure Variation in Spontaneously Breathing Patients

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01402934
Recruitment Status : Completed
First Posted : July 26, 2011
Last Update Posted : April 21, 2016
Information provided by:
Seoul National University Hospital

Brief Summary:
The investigators hypothesized that pulse pressure variation (PPV) could predict fluid responsiveness in spontaneously breathing patients undergoing anesthesia induction.

Condition or disease Intervention/treatment Phase
Pulse Pressure Variation Spontaneously Breathing Procedure: Hydroxyethyl starch solution (Voluven) infusion Not Applicable

Detailed Description:
Pulse pressure variation (PPV) is known to be a dynamic indicator to predict fluid responsiveness in mechanically ventilating patients. PPV is generated by cardiopulmonary interaction with respiratory cycles. In spontaneous breathing, the cardiopulmonary interaction may lead to PPV by inverted manner. In this study, the investigators will evaluate the ability of PPV to predict fluid responsiveness in spontaneously breathing patients. Before induction of anesthesia, radial artery cannulation is performed, and FloTrac/Vigileo (Edwards Lifesciences Corp., Irvine, USA) system is connected. And then, the investigators will measure baseline data including invasive blood pressure, pulse pressure, cardiac index, stroke volume variation in two different conditions: during tidal spontaneous breathing and during forced spontaneous breathing. All hemodynamic measurement will be repeated after infusion of fluid using 6mL/kg of hydroxyethyl starch solution (Voluven), and will be averaged over 3 minutes. Patients whose cardiac index increased by >15% to fluid infusion is defined as responders. The investigators will compare the hemodynamic parameters between responders and non-responders. To evaluate the ability to predict volume responsiveness, receiver operating characteristics curves of the PPV will be calculated.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 70 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: The Ability of Pulse Pressure Variation to Predict Fluid Responsiveness in Spontaneously Breathing Patients Undergoing Thoracic Surgery
Study Start Date : May 2011
Actual Primary Completion Date : September 2011
Actual Study Completion Date : October 2011

Resource links provided by the National Library of Medicine

Drug Information available for: Starch

Arm Intervention/treatment
Experimental: fluid infusion Procedure: Hydroxyethyl starch solution (Voluven) infusion
fluid loading will be performed by hydroxyethyl starch solution (Voluven), at 6 mL/kg

Primary Outcome Measures :
  1. pulse pressure variation [ Time Frame: three respiratory cycles, an expected average of 30 seconds ]

Secondary Outcome Measures :
  1. hemodynamic parameters [ Time Frame: before and after fluid loading, 1 mimute ]
    systolic blood pressure (SBP), dyastolic BP, mean BP, heart rate, cardiac index, stroke volume varation

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 80 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • patients undergoing thoracic surgery

Exclusion Criteria:

  • preoperative arrhythmia
  • left ventricular ejection fraction <40%
  • intra-cardiac valve disease
  • intra-cardiac shunt
  • pulmonary artery hypertension
  • severe peripheral vascular obstructive disease
  • decreased pulmonary function

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01402934

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Korea, Republic of
Seoul National University Hospital
Seoul, Korea, Republic of, 110-744
Sponsors and Collaborators
Seoul National University Hospital
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Responsible Party: Jae-Hyon Bahk, Seoul National University Hospital Identifier: NCT01402934    
Other Study ID Numbers: JHBahk_PPV
First Posted: July 26, 2011    Key Record Dates
Last Update Posted: April 21, 2016
Last Verified: July 2011
Additional relevant MeSH terms:
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Respiratory Aspiration
Respiration Disorders
Respiratory Tract Diseases
Pathologic Processes