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Detection of Hypovolemia Using Pleth Variability Index (PVI)

NCT01456559 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 14

Last updated 2013-01-17

No results posted yet for this study

Summary

The purpose with the planned study is to study Pleth Variability Index (PVI) as a non invasive indicator for mild hypovolemia during spontaneous breathing in healthy subjects. Lower body negative pressure (LBNP), a well established technique is used to create defined levels of hypovolemia.

Primary hypothesis: By applying a breathing resistance (positive end expiratory pressure PEEP) to spontaneous breathing, the respiratory synchronous variation in the pulse oximeter signal (PVI) is enhanced and enables PVI to detect and grade the level of mild hypovolemia.

Secondary hypothesis: 1) When tidal volume is increased, the respiratory synchronous variation in the pulse oximeter signal (PVI) will also increase. 2) The earlobe is superior to the finger in detecting PVI 3) Hemoglobin (Hb), detected non invasively by pulse oximetry, is not affected by hypovolemia created by LBNP

Conditions

  • Hypovolemia

Interventions

OTHER

Lower body negative pressure (LBNP)

The purpose with the planned study is to study pleth variability index (PVI) as a non invasive indicator for mild hypovolemia during spontaneous breathing in healthy subjects. Lower body negative pressure (LBNP), a well established technique, is used to create defined levels of hypovolemia. Baseline data are recorded with the subjects in the supine position breathing with normal tidal volume without PEEP and without LBNP applied. Data are then recorded with LBNP applied in two steps (40 and 15 mmHg). Recordings are continued 5 minutes after releasing the negative pressure. Data are collected in total in four different series; normal tidal volume without PEEP; normal tidal volume with PEEP 5cm H2O; three doubled tidal volume without PEEP; three doubled tidal volume with PEEP 5 cm H20.

Sponsors & Collaborators

  • University Hospital, Linkoeping

    lead OTHER

Principal Investigators

  • Lena Nilsson, MD, PhD · Anestesi- och operationskliniken, Linköping Universtity Hospital, S-581 85 Linköping, Sweden

Eligibility

Min Age
18 Years
Max Age
30 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2011-10-31
Primary Completion
2011-12-31
Completion
2011-12-31

Countries

  • Sweden

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01456559 on ClinicalTrials.gov