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Is virtual physical therapy effective?

Recently researchers compared virtual physical therapy after a total knee replacement surgery to traditional in-person physical therapy.

Total knee replacement surgeries have doubled in recent years and are not expected to decrease. After surgery, physical therapy is necessary to allow patients to fully recover and use their new knee. However, physical therapy is expensive and patients are often limited in the number of visits they are allowed to make due to insurance rules. It is also becoming increasingly difficult to find a physical therapist. A shortage of physical therapists is predicted, while people living in rural areas often do not have access to them at all.

Researchers from Duke University recently studied a virtual physical therapy program to determine its usefulness to patients in cost savings and effectiveness. The study was published in The Journal of Bone & Joint Surgery

The study followed adult patients that were scheduled to have total knee replacement surgery between November 1, 2016, and November 23, 2017. Before the surgery took place, the virtual group had the virtual physical therapy system installed in their homes. They also were given the recommended exercises for after surgery.

Three hundred and six patients participated in the study. The patients were randomly divided into two groups, with half doing traditional physical therapy and half doing virtual therapy. After surgery, the patients’ pain score, gait speed, and the number of falls while an inpatient were recorded.

The virtual therapy patients met with their virtual physical therapist once per week and were allowed to do as much physical therapy as they wanted to. The patients attended in-person postoperative visits at week two and week six.

Patients in the traditional physical therapy group met with their doctors and physical therapists per their doctor’s recommendations.

Six weeks after surgery, the patients visited the clinic where their gait speed and knee flexion/extension were measured. The study ended 12 weeks after the surgery was performed. Researchers gathered information on the costs incurred by both groups of patients based on Medicare rates.

Virtual therapy patients’ costs were almost two-thirds lower than traditional therapy. Virtual physical therapy costs averaged $1,050 compared to $2,805 for traditional physical therapy.

Virtual therapy patients also completed on average more days of therapy per week, had fewer rehospitalizations, and less difficulty with knee function during sports than traditional physical therapy patients. The two groups were equal in gait speed, knee flexion/extension, while the virtual therapy group had more falls.

This study suggests that virtual physical therapy is as safe and effective as traditional physical therapy after total knee replacement surgery. However, it does not address the physical therapist shortage expected in the future.


Written by Rebecca K. Blankenship, B.Sc.


Reference: Prvu Bettger J, Green C, Holmes D et al. Effects of Virtual Exercise Rehabilitation In-Home Therapy Compared with Traditional Care After Total Knee Arthroplasty. The Journal of Bone and Joint Surgery. 2020;102(2):101-109. doi:10.2106/jbjs.19.00695


Rebecca Blankenship BSc
Rebecca Blankenship BSc
Rebecca Blankenship is a freelance technical writer. She reviews, edits, and authors internal quality documentation required for regulatory compliance. She has twenty years experience in industrial pharma/medical device quality management systems and an honors BSc in chemistry. She is a natural born rule follower and enjoys applying this strength to help others be audit ready to meet regulatory requirements. She also loves learning about the latest scientific discoveries while writing for Medical News Bulletin. Her free time is spent as a full-time mom, encouraging can-do attitudes and cooperation in her three children.


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