Introduction/Purpose
Ahmad, et al investigated the moving patellar apprehension test or MPAT to discover its efficacy in diagnosing patellar instability. They focus on the moving patellar apprehension test examining its sensitivity, specificity, and positive and negative predictive values in patellar instability particularly pertaining to lateral patellar subluxation/dislocation. Patellar instability occurs mainly in the adolescent population and can be caused by a variety of anatomical factors including abnormal trochlea and patella, poor alignment of the lower limb, and poor static and dynamic patellofemoral stabilizers. Lateral patellar dislocation typically involves a history of patellofemoral instability with a twisting event while …show more content…
The knee is held in full extension while the examiner moves the patient’s patella laterally as far as it can be moved with his/her thumb. While keeping the patella in its lateral position, the examiner then flexes the knee to 90°. The examiner then uses his/her index finger to move the patella as medially as possible and brings the leg back into full extension. Part 1 is positive if the patient verbally expresses apprehension and he/she may activate their quadriceps. Part 2 is positive if the patient displays no apprehension and allows free flexion and extension of the knee. Both parts must be positive for a positive …show more content…
To participate in this study, patients from the Sports Medicine Service Hospital for Special Surgery in New York were screened. The patients had possible diagnoses of patellar instability in one or both knees and who had had a knee examined while anesthetized (knee surgery for management of conditions other than patellar instability). Inclusion required previous chart documentation of a MPAT test during an office visit and an exam under anesthesia including an attempt to laterally dislocate their patella manually. MRIs looking at the MPFL were also used. The exam under anesthesia was used as the standard to which the MPAT was compared. 51 patients participated in the study; 27 females and 24 males with 31 left knees and 20 right knees that met requirements for participation. Software (SPSS 14.0) was used to examine sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of the
Ahmad, et al investigated the moving patellar apprehension test or MPAT to discover its efficacy in diagnosing patellar instability. They focus on the moving patellar apprehension test examining its sensitivity, specificity, and positive and negative predictive values in patellar instability particularly pertaining to lateral patellar subluxation/dislocation. Patellar instability occurs mainly in the adolescent population and can be caused by a variety of anatomical factors including abnormal trochlea and patella, poor alignment of the lower limb, and poor static and dynamic patellofemoral stabilizers. Lateral patellar dislocation typically involves a history of patellofemoral instability with a twisting event while …show more content…
The knee is held in full extension while the examiner moves the patient’s patella laterally as far as it can be moved with his/her thumb. While keeping the patella in its lateral position, the examiner then flexes the knee to 90°. The examiner then uses his/her index finger to move the patella as medially as possible and brings the leg back into full extension. Part 1 is positive if the patient verbally expresses apprehension and he/she may activate their quadriceps. Part 2 is positive if the patient displays no apprehension and allows free flexion and extension of the knee. Both parts must be positive for a positive …show more content…
To participate in this study, patients from the Sports Medicine Service Hospital for Special Surgery in New York were screened. The patients had possible diagnoses of patellar instability in one or both knees and who had had a knee examined while anesthetized (knee surgery for management of conditions other than patellar instability). Inclusion required previous chart documentation of a MPAT test during an office visit and an exam under anesthesia including an attempt to laterally dislocate their patella manually. MRIs looking at the MPFL were also used. The exam under anesthesia was used as the standard to which the MPAT was compared. 51 patients participated in the study; 27 females and 24 males with 31 left knees and 20 right knees that met requirements for participation. Software (SPSS 14.0) was used to examine sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of the