A Prospective Clinical Trial Comparing Serum Mast Cell Tryptase (SMCT) Levels to Arthrofibrosis Rates Among Primary Total Knee Arthroplasty (TKA) Patients

Study Purpose

This research is being done to see if the amount of an enzyme in blood (called serum mast cell tryptase) changes before and after surgery. The investigators would like to see if these amounts are related to knee stiffness and pain in subjects that undergo a total knee replacement.

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 20 Years and Over
Gender All
More Inclusion & Exclusion Criteria

Inclusion Criteria:

  • - Investigators will include all patients with osteoarthritis who are surgical candidates for primary TKA.
Investigators will include all eligible male or female patients between the ages of 20 years to 100 years old. All included study participants must be able to give an informed consent.

Exclusion Criteria:

  • - Significant femoral or tibial deformity due to congenital or traumatic etiologies, inflammatory arthritis, post-septic arthritis, osteomyelitis, prior infection of knee joint, osteoporosis, dislocated or fragmented patella.
  • - Patients taking mast cell inhibitors and/or degranulation inhibitors for any reason.
  • - The presence of infections, highly communicable diseases (e.g. AIDS), active tuberculosis, venereal disease, hepatitis.
  • - Significant neurological or musculoskeletal disorders or disease that may adversely affect normal gait or weight bearing.
  • - Presence of previous prosthetic knee replacement devices (of any type) - Metastatic disease.
  • - Psychiatric illness.
  • - Drug or alcohol abuse.
- Inability to participate in standard postoperative rehabilitation protocol

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.

Mayo Clinic
Principal Investigator

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

Matthew Abdel, M.D.
Principal Investigator Affiliation Mayo Clinic
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.

Knee Osteoarthritis, Arthropathy of Knee, Arthrofibrosis
Study Website: View Trial Website

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.

Mayo Clinic, Rochester, Minnesota



Mayo Clinic

Rochester, Minnesota, 55905