Anatomy of the GSV for Rescue Peripheral IV AccessNCT04922606
Great Saphenous Vein Anatomy at the Proximal Medial Thigh as a Potential Site for Rescue Venous Access
A study testing US ot the GSV in people with Anatomy of the GSV for Rescue Peripheral IV Access, run by Mayo Clinic at 1 site in United States.
Trial summary
The purpose of this study is to assess the anatomy of the great saphenous vein at the level of the medial thigh in the general population in an effort to categorize this as a reliable target vessel for rescue peripheral IV access. Read more about this study
- Who is it for?
- Any ageHealthy volunteers can take part
- Conditions the study is for
- Anatomy of the GSV for Rescue Peripheral IV Access
- What is being tested?
- US ot the GSV
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 190 participants
- Where
- 1 siteUnited States
- Study dates
- 4 May 2021to May 2045
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages Any age
- All sexes
- Healthy volunteers accepted
- Child, Adult, Older adult
Who may be able to join
- Pediatric and adult Emergency Department patients and employees of all ages from all areas of the emergency department or additional training sites staffed by emergency medicine residents.
Who cannot join
- Critically ill patients as determined by the Emergency Medicine consultant of record for the patient.
- Legs not accessible due to dressing, wounds, or other factors.
- Overlying cellulitis/soft tissue infection or injury.
- Patients that are prison inmates and patients/patient's surrogates who are unable to give verbal consent/assent.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
United States1 site
Mayo Clinic in Rochester
Rochester, Minnesota, 55905
About this study
The purpose of this study is to assess the anatomy of the great saphenous vein at the level of the medial thigh in the general population in an effort to categorize this as a reliable target vessel for rescue peripheral IV access.
- Being tested
- US ot the GSV
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
US ot the GSVDiagnostic test
Ultrasound of the Great Saphenous Vein
| Study group | Role | What they receive |
|---|---|---|
| US of GSV | Other | Ultrasound of the Great Saphenous Vein Receives: Diagnostic Test: US ot the GSV |
What is being measured
The primary outcome is the main question the study is designed to answer.
Successful visualization of GSV
Number of times the great saphenous vein is identified at the level of the medial distal thigh in the general population using ultrasound
Measured: 12 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted10 Jun 2021
- Study start4 May 2021
- Primary completionMay 2045 (estimated)
- Study completionMay 2045 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Anatomy of the GSV for Rescue Peripheral IV AccessStudies of the same condition, open and under way.
- More trials run by Mayo ClinicThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Diagnosis
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 190 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Mayo Clinic
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Tobias Kummer, Mayo Clinic
- Investigators
- Tobias Kummer, MD, Principal investigator, Mayo Clinic
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04922606
- Sponsor's protocol ID
- 21-002859
- Status last verified
- Jul 2026
- First submitted
- 7 May 2021
- Last updated
- 20 Jul 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 20 Jul 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Great Saphenous Vein Anatomy at the Proximal Medial Thigh as a Potential Site for Rescue Venous Access
- ClinicalTrials.gov ID
- NCT04922606
- Acronym / sponsor ID
- 21-002859
- Study type
- Interventional
- Recruitment status
- Enrolling by invitation
- Enrolment
- 190 participants (estimated)
- Lead sponsor
- Mayo ClinicUniversity, hospital or other
- Study start
- 4 May 2021 (actual)
- Primary completion
- May 2045 (estimated)
- Study completion
- May 2045 (estimated)
- First posted
- 10 Jun 2021 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The purpose of this study is to assess the anatomy of the great saphenous vein at the level of the medial thigh in the general population in an effort to categorize this as a reliable target vessel for rescue peripheral IV access.
Study design
- Primary purpose
- Diagnosis
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| US of GSV | Other | Diagnostic Test: US ot the GSVUltrasound of the Great Saphenous Vein |
Who may qualify
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult, Older adult
Key inclusion criteria (1 listed)
- Pediatric and adult Emergency Department patients and employees of all ages from all areas of the emergency department or additional training sites staffed by emergency medicine residents.
Key exclusion criteria (4 listed)
- Critically ill patients as determined by the Emergency Medicine consultant of record for the patient.
- Legs not accessible due to dressing, wounds, or other factors.
- Overlying cellulitis/soft tissue infection or injury.
- Patients that are prison inmates and patients/patient's surrogates who are unable to give verbal consent/assent.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| US ot the GSVUltrasound of the Great Saphenous Vein | Diagnostic test | US of GSV |
Primary outcome
Successful visualization of GSV
Time frame: 12 months
Number of times the great saphenous vein is identified at the level of the medial distal thigh in the general population using ultrasound
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 20 Jul 2026.
- Individual participant dataSharing planned: No
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Tobias Kummer, MD principal investigator
Mayo Clinic
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing US ot the GSV in people with Anatomy of the GSV for Rescue Peripheral IV Access, run by Mayo Clinic at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: enrolling by invitation, as of the sponsor's last update on 20 Jul 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Successful visualization of GSV (time frame: 12 months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 20 Jul 2026.