- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00788255
In-vitro Study to Assess the Coagulation Effects of Exogenous Oxytocin Using Thromboelastography.
Study Overview
Status
Conditions
Detailed Description
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
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California
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Stanford, California, United States, 94305
- Stanford University School of Medicine
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:All obstetric patients with singleton pregnancies admitted to the labor and delivery unit at Lucile Packard Childrens Hospital awaiting elective induction of labor or elective Cesarean delivery. We will select 25 healthy ASA 1 patients with singleton pregnancies who are scheduled for uncomplicated elective induction of labor. Gestational age equal to or greater than 37 weeks.
Exclusion Criteria:Patients with underlying coagulation disorders. Patients with thrombocytopenia. Patients with pregnancy-induced hypertension, pre-eclampsia. Patients admitted for non-elective cesarean section. Patients in active labor. Patients requiring the following medications prior to surgery: NSAIDS, aspirin, anticoagulants.
Patients with significant obstetric or medical disease. No patients <18 years of age will be recruited.
Study Plan
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
All participants
For each patient, 1 solution with citrated whole blood (control) and 3 solutions with citrated whole blood and exogenous oxytocin were prepared in separate vials using micropipettes as follows: Citrated whole blood 1mL + 23μU oxytocin: final exogenous oxytocin concentration=22.5 μU/mL Citrated whole blood 1mL + 31μU oxytocin: final exogenous oxytocin concentration=30.1μU/mL Citrated whole blood 1mL + 34μU oxytocin: final exogenous oxytocin concentration=32.9μU/mL After mixing by inversion 8-10 times, 360μL kaolin-activated blood of each study solution was pipetted into a plastic cup in a prewarmed Thromboelastograph® (37°C). Each sample was recalcified in a plastic cup with 10μL of CaCl2 6.45%, and TEG® analysis was commenced within 1 minute of reconstituted sample preparation. |
Citrated whole blood 1mL + 23μU oxytocin.
After mixing by inversion 8-10 times, 360μL kaolin-activated blood of each study solution was pipetted into a plastic cup in a prewarmed Thromboelastograph® (37°C).
Each sample was recalcified in a plastic cup with 10μL of CaCl2 6.45%, and TEG® analysis was commenced within 1 minute of reconstituted sample preparation.
Other Names:
Citrated whole blood 1mL + 31μU oxytocin.
After mixing by inversion 8-10 times, 360μL kaolin-activated blood of each study solution was pipetted into a plastic cup in a prewarmed Thromboelastograph® (37°C).
Each sample was recalcified in a plastic cup with 10μL of CaCl2 6.45%, and TEG® analysis was commenced within 1 minute of reconstituted sample preparation.
Other Names:
Citrated whole blood 1mL + 34μU oxytocin.
After mixing by inversion 8-10 times, 360μL kaolin-activated blood of each study solution was pipetted into a plastic cup in a prewarmed Thromboelastograph® (37°C).
Each sample was recalcified in a plastic cup with 10μL of CaCl2 6.45%, and TEG® analysis was commenced within 1 minute of reconstituted sample preparation.
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
r Time
Time Frame: 6 months
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thromboelastographic indices - reaction time (normal range, 5-10 min)
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6 months
|
k Time
Time Frame: 6 months
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thromboelastographic indices - clot formation time (normal range, 1-3 min)
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6 months
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Alpha Angle
Time Frame: 6 months
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thromboelastographic - alpha angle = clot formation rate (normal range, 53 degress to 72 degrees)
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6 months
|
MA
Time Frame: 6 months
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thromboelastographic indices - maximum amplitude (normal range, 50-70 mm)
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6 months
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MRTG
Time Frame: 6 months
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thromboelastographic indices - maximum rate of thrombus generation (normal range, 5-17 mm/min)
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6 months
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Tmax
Time Frame: 6 months
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thromboelastographic indices - time to initiation of clot formation plus time to achieve maximum rate of clot strength development (normal range, 6-12 min)
|
6 months
|
TTG
Time Frame: 6 months
|
thromboelastographic indices - total thrombus generation (normal range, 584-796 mm)
|
6 months
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Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Alexander J Butwick, Stanford University
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- SU-10242008-1327
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
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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