Use of the LRU Pillow in the Acute Setting Following Total Knee Arthroplasty
Use of the LRU Pillow in the Acute Setting Following Total Knee Arthroplasty
The Null Hypothesis is that there is no significant change in range of motion (ROM), pain, or
 function for a group of patients following total knee arthroplasty (TKA) who use the LRU
 pillow as compared to a control group of total knee arthroplasty patients who do not use the
 pillow.
1. Study design will be a Pretest-Posttest Control Group Design . Enrollment would be
 random assignment of 20 patients to a control group vs 20 patients to a treatment group
 for patients with the diagnosis of osteoarthritis (OA) of the knee admitted for primary
 total knee arthroplasty. For specifics of patient assignment, please see below under
 Recruitment Procedures.

 2. Unpaired t-Tests will be used to determine differences between mean scores for the
 dependent variables (pain, range of motion, functional mobility). Analysis of Covariance
 will be run to quantify the effect of the co-variates of age, gender, body mass index
 (BMI), and contralateral previous TKA. Confidence Intervals will be set at 95%.
Inclusion Criteria:

 -  Primary total knee arthroplasty patients with primary diagnosis of osteoarthritis.

 Exclusion criteria:

 -  bilateral total knee arthroplasties

 -  revision total knee arthroplasties

 -  unexpected decline in medical or mental status

 -  Subjects will range from 30 years of age to 80 years of age

 -  primary diagnosis of rheumatoid arthritis