This study is randomized controlled trial with 5 years follow up and involved 101 patients divided in two groups; group A in which tourniquet was used in total knee arthroplasty while group B in which tourniquet was not used. All these patients were analyzed for the clinical and functional outcome measures.

In this study, investigators have primary outcome measures and secondary outcome measures which were assessed in multiple periods to see the effects of using tourniquet in total knee arthroplasty on the clinical and functional outcomes with follow up of 5 years.

Inclusion Criteria:

• Grade 3 and 4 osteoarthritis
• age 55-80 years
• patients agree to participate in the study

Exclusion Criteria:

• Smoking
• Diabetes mellitus .Symptomatic spinal pathology with moderate to severe cervical or lumbosacral spinal stenosis.
• Hip pathology like osteoarthritis or fractures
• Neuromuscular disorders
• Blood dyscrasia or anticoagulant treatment .Body mass index equal to 30 or more.
• Previous knee surgery or knee infection
• Peripheral vascular disease
• Rheumatoid arthritis
• Hemoglobin less than 12 gram/deciliter

Upon the publication of our study, I will decide to share my patients data

Double blinded study