Non-Invasive Measurement of Hemoglobin (Using Pulse Co-Oximetry) in Patients Undergoing Elective Cesarean Delivery

August 25, 2011 updated by: Stanford University

Study Comparing Non-Invasive Measurement of Hemoglobin (Using Pulse Co-Oximetry) With Laboratory Measurement in Patients Undergoing Elective Cesarean Delivery

We aim to assess a new pulse oximeter which measures continuous hemoglobin concentration (SpHb) in healthy patients undergoing elective Cesarean delivery (CS). This patient population often experiences significant blood loss during surgery, and measurements of surgical blood loss are often inaccurate. We will compare measurements of SpHb with estimated blood loss during the perioperative period, and laboratory measurements of hemoglobin at set time intervals during the perioperative and postoperative periods (to evaluate the accuracy of this device's ability to measure continuous SpHb).

Study Overview

Status

Completed

Conditions

Detailed Description

We hope that this pulse oximeter will provide important new information (SpHb) about hemoglobin measurement in patients undergoing elective CS, who may often experience significant blood loss and postpartum anemia in the perioperative period. The measurement of perioperative blood loss is often inaccurate, and formal measurements of hemoglobin levels are often associated with time delays, especially in the setting of ongoing acute blood loss. We hope that this device will provide accurate continuous data of hemoglobin in this patient population, which may prove to be a significant advance in patient monitoring in this patient population. Probes for SpHb measurement will be provided by Masimo Corporation.

Study Type

Observational

Enrollment (Actual)

50

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

  • United States
    • California
      • Stanford, California, United States, 94305
        • Stanford University School of Medicine

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

Female

Sampling Method

Probability Sample

Study Population

Healthy pregnant patients undergoing elective cesarean delivery under neuraxial anesthesia

Description

Inclusion Criteria:

  1. Healthy term (> 37 weeks gestation)
  2. ASA 1 and 2 pregnant patients undergoing elective uncomplicated Cesarean delivery under neuraxial anesthesia
  3. Age 18-40 yrs

Exclusion Criteria:

  1. Patients with abnormal Hemoglobin disorders.
  2. Patients with hyperbilirubinemia.
  3. Patients who are smokers.
  4. Patients with peripheral vascular disease or conditions affecting vascularity of the digits.

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: Prospective

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Total perioperative blood loss
Time Frame: Measured at the end of surgery (time frame cannto be specificied prior to study but estimated to be 60-90 mins)
The total estimated blood loss will be assessed at the end of the surgical period. This period is estimated to be 60-90 mins. We will record the time duration of surgery for all patients in the study.
Measured at the end of surgery (time frame cannto be specificied prior to study but estimated to be 60-90 mins)
maternal SpHb
Time Frame: SpHb measurements will be measured at the following timepoints:prior to surgery,continuously during the intraoperative period; within 10 minutes of completion of surgery; at 4hr, 24hr, and 48 hr following completion of surgery
SpHb measurements will be measured at the following timepoints:prior to surgery,continuously during the intraoperative period; within 10 minutes of completion of surgery; at 4hr, 24hr, and 48 hr following completion of surgery
maternal venous hemoglobin measurements
Time Frame: Maternal venous hemoglobin measurements will be performed at the following timepoints: prior to surgery, within 10 minutes of completion of surgery, 24 hr following completion of surgery
Maternal venous hemoglobin measurements will be performed at the following timepoints: prior to surgery, within 10 minutes of completion of surgery, 24 hr following completion of surgery

Collaborators and Investigators

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

Sponsor

Stanford University

Investigators

  • Principal Investigator: Alex James Butwick, Stanford University

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

April 1, 2010

Primary Completion (Actual)

December 1, 2010

Study Completion (Actual)

March 1, 2011

Study Registration Dates

First Submitted

April 14, 2010

First Submitted That Met QC Criteria

April 21, 2010

First Posted (Estimate)

April 22, 2010

Study Record Updates

Last Update Posted (Estimate)

August 26, 2011

Last Update Submitted That Met QC Criteria

August 25, 2011

Last Verified

August 1, 2011

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • SU-04082010-5622

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

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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