The SQUID Trial for the Embolization of the Middle Meningeal Artery for Treatment of Chronic Subdural Hematoma (STEM)
Completed · Not applicable · NCT04410146
Conditions: Subdural Hematoma, Chronic
At a glance
- Research payments reported, 2025
- $382,602
- U.S. investigators named
- 20
- Sites paid
- 21
- Planned or actual enrollment
- 319
About the trial
- Sponsor
- Balt USA
- Tested
- SQUID Embolization (device), SQUID Embolization and Surgical Evacuation (device), Surgical Evacuation (procedure), Standard Medical Management (other)
- Dates
- Started 2020-11-01; completion 2024-05-23
- Results posted
- Yes
STEM Study is a pivotal, international, multi-center, prospective, randomized (1:1) controlled trial designed to provide an assessment of the safety and effectiveness of Middle Meningeal Artery (MMA) embolization with SQUID for the management of Chronic Subdural Hematoma (cSDH)
From ClinicalTrials.gov, last updated 2026-06-04. Full record, eligibility and contacts (opens in a new tab)
Industry funding
Balt USA, LLC reported $382,602 in research payments for this study in 2025 (75 payments).
Research payments usually go to hospitals, universities and research sites to run a study, not to the investigators personally. A payment is not evidence of wrongdoing.
U.S. investigators named on this study
- Felipe C. Albuquerque, MD Neurosurgery · Phoenix, AZ
- Ephraim W. Church Neurosurgery · Stanford, CA
- Muhammad A. Taqi, M.D. Neurology · Palm Springs, CA
- Alois Zauner, MD Neurosurgery · San Diego, CA
- Ricardo A. Hanel, MD, PHD Neurosurgery · Jacksonville, FL
- Jonathan Grossberg Neurosurgery · Atlanta, GA
- Koji C. Ebersole, M.D. Neurosurgery · Kansas City, KS
- Alexander L. Coon, MD Neurosurgery · Baltimore, MD
- Cameron G. Mcdougall, MD Neurosurgery · Baltimore, MD
- Daniel L. Surdell JR., MD Neurosurgery · Omaha, NE
- Ronald P. Benitez, MD Neurosurgery · Morristown, NJ
- David J. Fiorella, M.D., PH.D. Neuroradiology · Stony Brook, NY
- Erez Nossek, M.D. Neurosurgery · New York, NY
- Clemens M. Schirmer, MD Neurosurgery · Danville, PA
- Stavropoula I. Tjoumakaris, MD Neurosurgery · Philadelphia, PA
- Adam S. Arthur, MD Neurosurgery · Memphis, TN
- Ramesh Grandhi, M.D. Neurosurgery · Salt Lake City, UT
- Ryan A. Mctaggart, MD Interventional Radiology · Roanoke, VA
- Stephen J. Monteith, MD Neurosurgery · Seattle, WA
- Sohyun Boo, M.D. Neuroradiology · Morgantown, WV
Clinicians the company named as principal investigators in its Open Payments reports.
Sites paid to run it
- $79,620
- The Research Foundation for The State University of New York $62,750
- Semmes-Murphey Clinic, P.c $46,198
- University of Utah Hospital and Clinics, UT $37,411
- Wcg Clinical, Inc dba Wcg Irb,llc $34,974
- Thomas Jefferson University, Jefferson Clinical Research Institute (jcri) $21,820
- The Johns Hopkins University $18,224
- Emory University Hospital, GA $16,639
- Morristown Medical Center, NJ $10,245
- Rhode Island Hospital - Lifespan Office of Research $8,500
- Kumc Research Institute, University of Kansas Medical Center $6,008
- The Nebraska Medical Center, NE $5,760
- Swedish Medical Center, WA $5,506
- St Josephs Hospital and Medical Center, AZ $5,490
- NYU School of Medicine -NYU Grossman School of Medicine $4,525
- Geisinger Clinic $4,000
- Baptist Health Research Institute $3,895
- Penn State University - the Pennsylvania State University College of Medicine (pennstate Hershey Milton S. Hershey Medical Center) $3,500
- Carondelet St. Joseph's Hospital $3,184
- Santa Barbara Cottage Hospital, CA $2,700
- West Virginia University Research Corporation $1,300
- Wcg Clinical, Inc dba Wcg Irb, LLC $354
Sources: CMS Open Payments research payments (program year 2025) and ClinicalTrials.gov, U.S. National Library of Medicine.