Great Saphenous Vein Anatomy at the Proximal Medial Thigh as a Potential Site for Rescue Venous Access


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 Type

  • Study Type: Interventional
  • Study Design
    • Allocation: N/A
    • Intervention Model: Single Group Assignment
    • Primary Purpose: Diagnostic
    • Masking: None (Open Label)
  • Study Primary Completion Date: May 7, 2022


  • Diagnostic Test: US ot the GSV
    • Ultrasound of the Great Saphenous Vein

Arms, Groups and Cohorts

  • Other: US of GSV
    • Ultrasound of the Great Saphenous Vein

Clinical Trial Outcome Measures

Primary Measures

  • 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

Participating in This Clinical Trial

Inclusion Criteria

  • 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. Exclusion Criteria:

  • 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.

Gender Eligibility: All

Minimum Age: N/A

Maximum Age: N/A

Are Healthy Volunteers Accepted: Accepts Healthy Volunteers

Investigator Details

  • Lead Sponsor
    • Mayo Clinic
  • Provider of Information About this Clinical Study
    • Principal Investigator: Tobias Kummer, Principal Investigator – Mayo Clinic
  • Overall Official(s)
    • Tobias Kummer, MD, Principal Investigator, Mayo Clinic

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