Home Monitoring After Primary Total Knee Arthroplasty

The investigators will determine the reliability of the at-home monitoring technology for recording and transmitting data from the patient's home to the healthcare provider. This will be measured for each patient individually and then combined to form an aggregate measurement. Reliability of the technology to collect data was calculated for each patient individually by counting the number of times data (range of motion, TUG test results, VAS Pain score, etc) was received and dividing that number by the number of times data was expected (activities reported as complete by patients). This was then converted into a percentage. Additionally, this number was aggregated by combining the numerators (activities received) for all patients and denominators (activities complete) for all patients and determining the overall reliability of the technology.

Time frame: daily, from the date of discharge until the 12 week postoperative follow-up appointment has occurred

Change from Preoperative to Postoperative Knee Range of Motion, Knee range of motion is recorded daily using sensors above and below the knee. Please note: only data from sensors is being reported

Time frame: Once preoperatively then postoperatively 2-3 times daily from the date of discharge until the 12 week postoperative follow-up appointment has occurred

Population: One patient was withdrawn from the study prior to the 8 week follow-up visit due to an adverse event. Therefore, only 9 patients were included in the analysis at 8 weeks and 12 weeks postoperative.

Change from Preoperative to Postoperative Timed Up and Go Test. The time that a patient takes to rise from a chair, walk three meters, turn around, walk back to the chair, and sit down. This time was recorded electronically by the patient at home using the tablet.

Time frame: Once preoperatively then postoperatively 2-3 times daily from the date of discharge until the 12 week postoperative follow-up appointment has occurred

Population: One patient was withdrawn from the study prior to the 8 week follow-up visit due to an adverse event. Therefore, only 9 patients were included in the analysis at 8 weeks and 12 weeks postoperative.

We will assess KOOS Pain using 9 questions, each response given a point value from 0 to 4. The sum of these points will total between 0 and 36 points. This score will be normalized to a 100 point scale where 100 means no pain and 0 is extreme pain.

Time frame: Once preoperatively then postoperatively once weekly from the date of discharge until the 12 week follow-up appointment has occurred

Population: One patient was withdrawn from the study prior to the 8 week follow-up visit due to an adverse event. Therefore, only 9 patients were included in the analysis at 8 weeks and 12 weeks postoperative.

We will assess KOOS Function using 7 questions, each response given a point value from 0 to 4. The sum of these points will total between 0 and 28 points. This total will be normalized to a 100 point scale where 100 means no functional difficulty and 0 is extreme difficulty.

Time frame: Once preoperatively then postoperatively once weekly from the date of discharge until the 12 week follow-up appointment has occurred

Population: One patient was withdrawn from the study prior to the 8 week follow-up visit due to an adverse event. Therefore, only 9 patients were included in the analysis at 8 weeks and 12 weeks postoperative.

We will assess KOOS QOL using 4 questions, each response given a point value from 0 to 4. The sum of these points will total between 0 and 16 points, which will then be normalized to a 100 point scale. One hundred (100) means the knee does not affect quality of life and 0 indicates that the knee is a constant problem affecting quality of life.

Time frame: Once preoperatively then postoperatively once weekly from the date of discharge until the 12 week follow-up appointment has occurred

Population: One patient was withdrawn from the study prior to the 8 week follow-up visit due to an adverse event. Therefore, only 9 patients were included in the analysis at 8 weeks and 12 weeks postoperative.

Percentage of required at-home therapy exercises completed each session, as well as the total percentage completed during all home therapy sessions

Time frame: Percentage of exercises completed 2-3 times daily, from the date of discharge up to approximately 4 weeks postoperatively when outpatient physical therapy begins

Knee-related pain was measured using a visual analog scale with numeric values added to the line. Zero (0) is the minimum value and 10 is the maximum value. A score of 0 indicates no pain and a score of 10 indicates the worst pain imaginable.

Time frame: Once preoperatively then postoperatively 2-3 times daily from the date of discharge until the 12 week postoperative follow-up appointment has occurred

Population: One patient was withdrawn from the study prior to the 8 week follow-up visit due to an adverse event. Therefore, only 9 patients were included in the analysis at 8 weeks and 12 weeks postoperative.