Data from 515 knee arthroscopies performed at IMS&SUM Hospital, Bhubaneswar between September 2015 and December 2018 for ligament injuries, loose body removals, lateral release of the patellar retinaculum, plica division, and adhesiolysis was prospectively collected. A subset of 360 patients from the above group who sequentially had clinical examination, KT-1000, MRI and arthroscopy for ACL injuries were considered for the present study and 155 patients without ACL injuries served as control group and the data was reviewed. In these patients, the results of clinical tests and instrumented laxity tests without anesthesia prior to the arthroscopy were analyzed. An experienced surgeon performed KT-1000 assessment. Clinical and KT-1000 findings were compared with Arthroscopy as the gold standard. A thorough clinical examination along with KT-1000 performed by a skilled examiner more accurately correlated at Arthroscopy. The KT-1000 knee arthrometer (KT-1000) is an objective instrument to measure anterior tibia motion relative to the femur for anterior cruciate ligament (ACL) reconstruction. The Lachman test and the maximum anterior pull KT-1000 instrumented test revealed abnormal laxity in 159 and 162 of 168 cases of acute ACL injuries whereas 141 and 150 of 152 cases of chronic ACL injuries respectively.