Accuracy of Depth and Landmark Assessment Using Neuraxial Ultrasound Devices
| Status: | Not yet recruiting |
|---|---|
| Conditions: | Women's Studies |
| Therapuetic Areas: | Reproductive |
| Healthy: | No |
| Age Range: | 18 - 50 |
| Updated: | 4/21/2016 |
| Start Date: | January 2016 |
| End Date: | September 2017 |
| Contact: | Brendan Carvalho, MBBCh, FRCA |
| Email: | brendan.carvalho@stanford.edu |
| Phone: | 650-723-5403 |
The purpose of this study is to determine if a handheld ultrasound device helps in the
placement of labor epidurals by studying the accuracy of the Accuro Handheld Ultrasound
device compared to a standard ultrasound machine.
placement of labor epidurals by studying the accuracy of the Accuro Handheld Ultrasound
device compared to a standard ultrasound machine.
Pregnant women who present to Labor and Delivery for an anticipated vaginal delivery will be
identified as potential participants based on inclusion/exclusion criteria and their desire
for labor epidural analgesia. Ultrasound evaluations will be conducted in a cohort of 50
parturients who decide they want epidural analgesia in labor. Prior to epidural placement, a
hand held ultrasound device will be utilized to identify L2/3, L3/4 and L4/5 interspace. A
mark will be made on the patient's back at these levels. The handheld ultrasound device will
also estimate the depth to epidural space at each level using its programmed algorithm. A
standard ultrasound will then be used to locate the same interspaces, identify midline, and
estimate depth to epidural space with caliper calculation. Upon patient request, an epidural
will be placed at L3/4 with a loss of resistance to saline technique. The actual depth to
loss of resistance during epidural insertion will be determined by measuring the Tuohy with
a sterile measuring tape while it is in the skin.
identified as potential participants based on inclusion/exclusion criteria and their desire
for labor epidural analgesia. Ultrasound evaluations will be conducted in a cohort of 50
parturients who decide they want epidural analgesia in labor. Prior to epidural placement, a
hand held ultrasound device will be utilized to identify L2/3, L3/4 and L4/5 interspace. A
mark will be made on the patient's back at these levels. The handheld ultrasound device will
also estimate the depth to epidural space at each level using its programmed algorithm. A
standard ultrasound will then be used to locate the same interspaces, identify midline, and
estimate depth to epidural space with caliper calculation. Upon patient request, an epidural
will be placed at L3/4 with a loss of resistance to saline technique. The actual depth to
loss of resistance during epidural insertion will be determined by measuring the Tuohy with
a sterile measuring tape while it is in the skin.
Inclusion Criteria:
- American Society of Anesthesiologists physical status class I, II, or III
- age between 18 and 50
- singleton term pregnancy
- requesting epidural analgesia for anticipated vaginal delivery
- all ethnicities
Exclusion Criteria:
- contraindication for epidural analgesia (bleeding diathesis, neuropathy, severe
scoliosis, previous spine surgery, local anesthetic allergy)
- inability to adequately understand the consent form
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