The claimant then had a total knee replacement, with his doctor opining a 40% <a href="https://thelomad.com/getmad.today/wp-contentwww.getmad.today/blog/2021/08/using-the-contralateral-limb-as-a-baseline-for-calculating-schedule-loss-of-use/">schedule loss</a> of use of the right leg