Somatosensory Evoked Potentials and Pain Thresholds in Term and Preterm-Born Adolescents After Early Exposure to Pain; a Quantitative Study

May 20, 2015 updated by: Pesach Shvartzman, Soroka University Medical Center

Background: Several studies have indicated that infants who had undergone postnatal painful procedures appear to be hypersensitive to pain, with a lower threshold to tactile stimulations later on life.

Objective: To study the effect of early exposure to pain on cerebral somatosensory evoked potential (SEP) response to thermal stimulation (550C), in preterm and full term born adolescents (15-18 years old), who have undergone painful procedures during their neonatal period. As well as to study the effect of early exposure to thermal and tactile sensory thresholds and pain thresholds to thermal and tactile stimuli, by using the TSA and von Frey hairs.

Design: Case-control study.

Participants: Four groups of 20 adolescents (aged 15-18 years), two of which are full term and preterm-born who were exposed to painful procedures during the neonatal period. The other two groups are term and preterm-born adolescents who were not exposed to such procedures.

Main Outcome Measures: Cerebral SEP response (P300, Medoc Ltd., Israel) to thermal stimulation (550C). Warm-sensation threshold (WST), heat-pain threshold (HPT), Cold sensation threshold (CST) and cold pain threshold (CPT) by using Thermal sensory analyzer (TSA-2001,Medoc Ltd., Israel). Pain threshold to tactile stimulation will be measured by using Von-Frey hairs.

Study Overview

Status

Terminated

Conditions

Intervention / Treatment

Study Type

Observational

Enrollment (Actual)

10

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

  • Israel
      • Beer-Sheva, Israel, 84105
        • Ben Gurion University of the Negev, Siaal research center for family medicine and primary care

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

15 years to 18 years (Child, Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Four groups of 20 adolescents (aged 14 years or older), two of which are full term and preterm-born who were exposed to painful procedures during the neonatal period. The other two groups are term and preterm-born adolescents who were not exposed to such procedures.

Description

Inclusion Criteria:

For all:

  • Age 15-18
  • Appropriate weight for gestational age (AGA)
  • Informed consent signed by the parent
  • Presence of one parent during the examination

Premature groups:

  • Preterm-born (32-34 weeks of gestation)
  • Admitted to the NICU (ventilated vs. non-ventilated)

Full term groups:

  • Completed 37 weeks of gestation Pain groups (premature and full term)
  • Admitted to the NICU
  • Mechanically-ventilated during the first week of life
  • Mechanically-ventilated for at least 48 hours

Exclusion Criteria:

  • Current use of analgesia
  • A chronic illness with current medical treatment
  • Cognitive impairment

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

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
NICU full-term early pain group
Device: Thermal stimulation
Cerebral SEP response (P300, Medoc Ltd., Israel) to thermal stimulation (550C). Warm-sensation threshold (WST), heat-pain threshold (HPT), Cold sensation threshold (CST) and cold pain threshold (CPT) by using Thermal sensory analyzer (TSA-2001,Medoc Ltd., Israel). Pain threshold to tactile stimulation will be measured by using Von-Frey hairs.
NICU premature early pain group
Device: Thermal stimulation
Cerebral SEP response (P300, Medoc Ltd., Israel) to thermal stimulation (550C). Warm-sensation threshold (WST), heat-pain threshold (HPT), Cold sensation threshold (CST) and cold pain threshold (CPT) by using Thermal sensory analyzer (TSA-2001,Medoc Ltd., Israel). Pain threshold to tactile stimulation will be measured by using Von-Frey hairs.
NICU premature control group
Device: Thermal stimulation
Cerebral SEP response (P300, Medoc Ltd., Israel) to thermal stimulation (550C). Warm-sensation threshold (WST), heat-pain threshold (HPT), Cold sensation threshold (CST) and cold pain threshold (CPT) by using Thermal sensory analyzer (TSA-2001,Medoc Ltd., Israel). Pain threshold to tactile stimulation will be measured by using Von-Frey hairs.
Soroka- full-term control group
Device: Thermal stimulation
Cerebral SEP response (P300, Medoc Ltd., Israel) to thermal stimulation (550C). Warm-sensation threshold (WST), heat-pain threshold (HPT), Cold sensation threshold (CST) and cold pain threshold (CPT) by using Thermal sensory analyzer (TSA-2001,Medoc Ltd., Israel). Pain threshold to tactile stimulation will be measured by using Von-Frey hairs.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Cerebral SEP response (P300, Medoc Ltd., Israel) to thermal stimulation (550C).
Time Frame: During the test
During the test

Secondary Outcome Measures

Outcome Measure
Time Frame
Warm-sensation threshold (WST), heat-pain threshold (HPT), Cold sensation threshold (CST) and cold pain threshold (CPT) by using Thermal sensory analyzer (TSA-2001,Medoc Ltd., Israel).
Time Frame: At time of the test
At time of the test
Pain threshold to tactile stimulation will be measured by using Von-Frey hairs
Time Frame: At time of the test
At time of the test

Collaborators and Investigators

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

Sponsor

Soroka University Medical Center

Investigators

  • Principal Investigator: Pesach Shvartzman, MD, Ben-Gurion University of the Negev

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

August 1, 2007

Primary Completion (Actual)

January 1, 2014

Study Completion (Actual)

January 1, 2014

Study Registration Dates

First Submitted

July 17, 2007

First Submitted That Met QC Criteria

July 17, 2007

First Posted (Estimate)

July 18, 2007

Study Record Updates

Last Update Posted (Estimate)

May 21, 2015

Last Update Submitted That Met QC Criteria

May 20, 2015

Last Verified

May 1, 2015

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • SOR458107CTIL

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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