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Jason L. Dragoo, MD

Academic Appointments

  • Associate Professor of Orthopaedic Surgery at the Stanford University Medical Center

Contact Information

Professional Overview

Clinical Focus

  • Sports Medicine
  • Orthopaedic Surgery

Academic Appointments

Administrative Appointments

  • Head, Team Physician, Stanford Football Program (2007 - present)
  • Team Physician, Stanford Athletic Department (2005 - present)

Honors and Awards

  • US Ski Team Physician, United States Ski and Snowboard Association (2005-curr)
  • US Olympic Committee Level III Physician, Volunteer Services, US Olympic Committee (2010-curr)
  • Top 70 Best Knee Surgeons in America, Becker's Hospital Review (2010)
  • Listed in “Top US Orthopeadic Surgeons in Sports Medicine”, Consumers Research Council of America (2008)
  • North American representative for Scientific Exchange with Europe, AOSSM/ESSKA (2008)
  • Bone and Joint Decade Young Investigator Award, Bone and Joint Decade (2006)
View All 19honors and awards of Jason Dragoo

Professional Education

Residency: UCLA Health Sciences CA (2004)
Board Certification: Sports Medicine, American Board of Orthopaedic Surgery (2010)
Subspecialty Certification: Sports Medicine, American Board of Orthopaedic Surgery (2011)
Board Certification: Orthopaedic Surgery, American Board of Orthopaedic Surgery (2007)
Fellowship: Steadman-Hawkins Sports Clinic CO (2005)
Internship: UCLA Health Sciences CA (1999)
View All 10



Scientific Focus

Current Research and Scholarly Interests


Current Tissue Engineering studies will focus on 3 main areas:

1. The ability to harvest stem cells from a patient, induce them into cartilage cells, and place them back into the patient during the same surgical procedure. Current surgical techniques require 1 surgery to harvest the cells, 2-3 weeks of laboratory processing, and another surgery to implant the cells. These techniques would revolutionize the use of stem cells in Orthopaedic Surgery.

2. Reconfigure the biologic matrices and processing to allow resurfacing of entire joint surfaces. This process would make current metal joint replacements obsolete and would allow the treatment of arthritis with the patients own stem cells.

3. Decipher the genetic induction code and ideal matrix for meniscal cartilage engineering. This would allow the production of meniscal cartilage grafts from the patients own stem cells.


1. Female ACL tears-The incidence of anterior cruciate ligament (ACL) rupture in female athletes is two to eight times that in males. Although many anatomical and biomechanical gender differences have been described, evidence is beginning to accumulate that female hormones are responsible for alterations in ligament laxity and strength. Relaxin is a peptide hormone found in the sera of pregnant and non-pregnant females, yet is not detectable in male serum. This hormone is thought to be responsible for connective tissue remodeling secondary to its collagenolytic effects.

We have identified relaxin receptors on the human female ACL. This supports the conclusion that relaxin, a hormone found in some non-pregnant females, may be responsible for the high incidence of ACL rupture in female athletes. We have also shown that the administration of relaxin to female guinea pigs results in ACL laxity and weakness. Recently, we have shown that relaxin levels in female intercollegiate athletes are higher in athletes who experience an ACL injury. We are currently developing a blocking antibody to administer to susceptible female athletes to hopefully decrease the ACL injury rate.

2. ACL tears and Arthritis-We are currently evaluating the body’s response to ACL injury, which may damage the articular cartilage in certain athletes. This may explain why certain athletes with ACL injury develop degenerative changes and early arthritis. Identification of cartilage injury patterns will help initiate early treatment intervention protocols to minimize the development of early arthritis in athletes.

3. New Surgical Techniques- We have created a new technique to perform revision (already had an ACL reconstruction, now it is torn again) ACL reconstruction during 1 surgical procedure. Previously, this procedure often required 2 surgeries: 1 to bone graft the previous bone defects and a second surgery 4 months later to reconstruct the ACL. This new procedure would save rehabilitation time and money and would mean less surgery for the patient. Final confirmatory animal studies are currently being performed.
4. Genetics- we are currently exploring possible genetic links to ACL injury using genome wide gene correlations of injuries in patient populations greater than 110,000.
5. ACL injury prevention- We have developed, and are currently testing, new methods for ACL prevention including: 1) New training programs using unstable surfaces, 2) Electronic Smartbraces, which sense the athletes movement patterns and give them feedback via vibration to stay away from dangerous positions.


This procedure involves concentrating growth factors from the patient's blood and injecting them at the site of injury to accelerate healing. We are currently investigating the use of PRP for tears to the patellar and quadriceps tendon, using a randomized controlled trial. We are also working on new formulations of PRP in the laboratory to improve clinical results.


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Publication Topics

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