Panel lawyer

I want a lawyer for our panel advisor for a company who will handle any future case. This company is an Indian company who deals with international clients in Healthcare Consulting. Should there be any medical dispute for any case and we want that to be handled by the lawyer. We want the lawyer to do the arbitration and mediation so there be any claim for compensation. Since there are no active case right now I wonder what will be a cost effective way. If we keep a lawyer right now then there wouldn't be any engagement for him despite we paying him every month. In the companies which are located in Europe and America I have seen that there are two types of system the companies operate who had very low volume of court cases. 1. They keep a panellist lawyer who charges a small amount agreement and if there is a court case, then he fights the case for the company at a very nominal cost. 2. There is a second model whereby the lawyer isn't paid anything however he has got a contractor agreement with a company to charge certain amount of money, should there be a future case. Kindly advise us if there is any such model which can be worked out in India.