Try our beta test site
IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more...

Use of Ultrasound in Obstetric Neuraxial Analgesia and Anesthesia Data Base

This study has been terminated.
(Lack of personnel/research time to recruit participants.)
Information provided by (Responsible Party):
University of Missouri-Columbia Identifier:
First received: August 26, 2010
Last updated: September 2, 2016
Last verified: September 2016
This is a data base building project on the use of pre-procedure ultrasound for the performance of labor epidural pain relief and spinal anesthesia for cesarean deliveries. Data collection includes ultrasound measured depth, actual needle depth, angle of ultrasound probe, actual needle angle, success rates, patient height and weight, number of attempts needed to place the epidural needle or spinal needle. Currently we are looking at the agreement between ultrasound determined depth of the epidural space or intrathecal space with actual needle depth.

Condition Intervention
Device: Ultrasound

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Use of Ultrasound in Obstetric Neuraxial Analgesia and Anesthesia Data Base

Resource links provided by NLM:

Further study details as provided by University of Missouri-Columbia:

Primary Outcome Measures:
  • Correlation of Ultrasound vs Needle Depth [ Time Frame: Beginning of ultrasound exam to end of ultrasound exam: average 5 min ]
    The ultrasound measured depth taken via oblique sagittal views and transverse views of the epidural space for epidural analgesia or intrathecal space for spinal anesthesia will be correlated with actual needle depth

Secondary Outcome Measures:
  • Attempt Number [ Time Frame: Beginning of placement of epidural or spinal needle to end of placement: average 10 min ]
    The number of needle placement attemtps: an attempt is defined as a separate needle placement The number of needle redirects: a redirect is defined at the need for changing the angle of needle direction at each separate needle attempt

Enrollment: 250
Study Start Date: January 2010
Study Completion Date: September 2012
Primary Completion Date: September 2012 (Final data collection date for primary outcome measure)
Groups/Cohorts Assigned Interventions
Ultrasound of the spine
Pregnant women receiving labor epidural analgesia or spinal anesthesia for cesarean delivery
Device: Ultrasound
Preprocedure ultrasound examination of the spine

Detailed Description:

All patients presenting in labor or are having a cesarean delivery are eligible except: patients who are under age 18, have contraindications to regional anesthesia, in advanced labor, having emergency conditions and/or unable to understand the consent process.

  • Data collected include:
  • Ultrasound depth in transverse and oblique sagittal views
  • Actual needle depth
  • Level of placement
  • Number of separate needle placements
  • Number of needle redirects
  • Angle of probe
  • Angle of needle
  • Total number of attempts
  • Pt height
  • Pt weight
  • Pt BMI
  • Pt age
  • Pt gravity/parity
  • Pt co-morbidities, e.g. pre-eclampsia
  • Procedure performed
  • Operator (Attending, CA-1, CA-2, CA-3, CRNA)

What is currently being examined is the correlation between ultrasound depth of the target area vs actual needle depth


Ages Eligible for Study:   18 Years to 55 Years   (Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
Pregnant patients in labor Pregnant patients scheduled for cesarean section

Inclusion Criteria:

  • Pregnant women in labor or scheduled for induction requesting labor epidural analgesia
  • Pregnant women scheduled for cesarean delivery
  • Pregnant women in labor who are going to have a non-emergent cesarean delivery under spinal anesthesia

Exclusion Criteria:

  • Emergency delivery
  • Emergency cesarean section
  • Advanced labor
  • Contraindications to neuraxial analgesia/anesthesia
  • Unable to understand consent
  • Under the age of 18
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01192074

United States, Missouri
University of Missouri Women's and Children's Hospital
Columbia, Missouri, United States, 65201
Sponsors and Collaborators
University of Missouri-Columbia
Principal Investigator: Steven T Fogel, MD University of Missouri-Columbia
  More Information

Responsible Party: University of Missouri-Columbia Identifier: NCT01192074     History of Changes
Other Study ID Numbers: 1147418
Study First Received: August 26, 2010
Last Updated: September 2, 2016

Keywords provided by University of Missouri-Columbia:
Obstetric Anesthesia
Obstetric Analgesia
epidural analgesia
epidural anesthesia
spinal anesthesia
neuraxial anesthesia
neuraxial analgesia
cesarean delivery
cesarean section

Additional relevant MeSH terms:
Central Nervous System Depressants
Physiological Effects of Drugs processed this record on April 21, 2017