A Rehabilitation Tool to Determine Patient's Stay in Hospital After Joint Replacement
Phase: NA
Conditions: Total Joint Replacement Surgery
Sponsor: Derek Amanatullah

NCT03776357 
 
May 3, 2019 
A rehabilitation tool to determine patient’s stay in hospital after joint 
replacement  
 
Protocol director: Dr. Derek Amantullah 
Study coordinator: 
 
 
Introduction: Reflexion Health, Inc. has developed a post-operative 
rehab tool allowing the surgeon and the entire healthcare staff to 
optimize care according to the patient’s specific needs. 
 It presents data based insights to quickly review the progress of the 
patients on predicted trajectories of recovery, and more easily identify 
and triage those few patients who might have to stay longer in hospital 
facility.  
As part of an integrated clinical care pathway, post-operative scoring of 
likelihood of discharge is an attractive prospect, because it allows 
caregivers to focus on patients who require the most assistance with 
obtaining safe and appropriate postoperative care.  
 
 
Purpose 
To obtain an objective score 
which is patient-centered, data-
driven, and value-based solution 
for post-operative rehabilitation.  
 
Eligibilty criteria 
 Joint replacement surgery, age 
should be more than or equal to 
18 years. 
 
Study type 
Prospective observational study 
Sample size 
40  
Endpoints 
Primary endpoint: Length of stay 
in hospital. Higher the score, 
shorter is the stay. 

NCT03776357 
 
May 3, 2019 
Secondary endpoint: Reliability on 
software (VERA) to co-relate with 
clinical data on data points such 
as discharge location, gait aid use, 
Knee society score(KSS) and range 
of motion(ROM). Time intervals 
for recording Gait aid use, KSS 
and ROM are as - 
1. Gait aid use at the time of 
discharge, 2 weeks follow 
up, 6 weeks follow up, 3 
weeks follow up, 1 year 
follow up and 2 year follow 
up  
2.  Outcome score ( KSS) at 3 
weeks follow up, 1 year 
follow up and 2 year follow 
up 
3. Range of motion at 2 weeks 
follow up, 6 weeks follow 
up, 3 months follow up, 1 
year follow up and 2 year 
follow up 
Activities to be performed on 
VERA during Pre-op visit only 
1. 30 second Sit to Stand Test  
2. Single Leg Balance Test 
3. Step Test: (8” step) Time it 
takes to independently 
complete 10 reps 
 
PROM used 
KOOS JR, KSS and PROMIS 
Personnel 
IRB submission & data collection 
Dr. Derek F. Amanatullah, M.D., 
Ph.D. 

NCT03776357 
 
May 3, 2019 
Phone: 
 
Email: dfa@stanford.edu   
 
 
Phone : 
 
Email : 
 
 
 
Schedule of data collection: 
 
Variable 
Pre-op 
2 weeks 
6 weeks 
3 months 
1 years 
2 years 
Gait aide 
X 
X 
X 
X 
X 
X 
Range of 
motion 
X 
X 
X 
X 
X 
X 
Knee 
society 
score 
X 
 
 
X 
X 
X 
KOOS 
X 
 
 
X 
X 
X 
PROMIS 
X 
 
 
X 
X 
X