Local Anesthetic Response in Ehlers-Danlos Syndrome (EDS) and Healthy Volunteers

Study Purpose

Local anesthetic resistance is commonly reported by patients with EDS. However, there are no objective data on the occurrence of local anesthetic resistance in EDS patients and in healthy volunteers. We propose to collect such objective data on the frequency of drug resistance and whether any problems with local anesthesia are due to initial ineffectiveness or due to its effects dissipating too soon.

Recruitment Criteria

Accepts Healthy Volunteers

Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms

Study Type

An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes.

An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes.

Searching Both is inclusive of interventional and observational studies.

Eligible Ages 18 Years and Over
Gender All
More Inclusion & Exclusion Criteria

Inclusion Criteria:

  • - EDS patients, clinically diagnosed hypermobile EDS based on 2017 criteria.
  • - EDS patients with genetically proven non-hypermobile EDS.
  • - Healthy participants, no EDS.
  • - Able and willing to provide informed consent.

Exclusion Criteria:

  • - Known allergy to Lidocaine or Bupivacaine.
- Unable to provide informed consent

Trial Details

Trial ID:

This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.


Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans.

Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data.

Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs.

Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.

Lead Sponsor

The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.

Vanderbilt University Medical Center
Principal Investigator

The person who is responsible for the scientific and technical direction of the entire clinical study.

Satish R Raj, MD MSCI
Principal Investigator Affiliation Vanderbilt University Medical Center
Agency Class

Category of organization(s) involved as sponsor (and collaborator) supporting the trial.

Overall Status Enrolling by invitation
Countries United States

The disease, disorder, syndrome, illness, or injury that is being studied.

Ehlers-Danlos Syndrome, Anesthesia, Local
Additional Details

There was a prior large online questionnaire to better understand the issues around local anesthetic resistance. By November 2018, 933 EDS patients (total 1059 respondents) completed the survey, 99.2% of which had previously received local anesthetics. Among these patients, 88% reported that they have "had a problem with local anesthetic injection not working adequately or properly," while only 54% of respondents without EDS reported a similar problem. These data suggests that local anesthetic resistance might be more prevalent in patients with EDS than in the general population. If these findings are true, then this might have significant implications for the appropriate management of these patients during minor surgery and dental procedures. This study aims to assess the frequency and related issues around local anesthetic resistance in EDS patients, including whether the problem is a lack of analgesia or a timing effect (short duration of action or delayed onset of action), and whether the problem relates only to some local anesthetics or whether there is a problem with the whole class of local anesthetics.

Arms & Interventions


: EDS Patients

Patients meeting the diagnostic criteria (2017) for Ehlers-Danlos Syndrome

: Healthy Volunteers

Healthy control volunteers who do not meet the criteria for Ehlers-Danlos Syndrome


Drug: - 0.9% Sodium Chloride Injection

All participants will be injected subcutaneously with a single 0.5ml dose

Drug: - Lidocaine Injection 2%

All participants will be injected subcutaneously with a single 0.5ml dose

Drug: - Bupivacaine Injection 0.5%

All participants will be injected subcutaneously with a single 0.5ml dose

Contact a Trial Team

If you are interested in learning more about this trial, find the trial site nearest to your location and contact the site coordinator via email or phone. We also strongly recommend that you consult with your healthcare provider about the trials that may interest you and refer to our terms of service below.

Vanderbilt University Medical Center, Nashville, Tennessee



Vanderbilt University Medical Center

Nashville, Tennessee, 37232