A hospital is reluctant to B brand monitors, there are reasons. 1) generally do not do raw familiar, hospitals and A brand cooperation for many years, surely A brand monitors of quality and after-sales service is satisfactory, 2) too many brands, equipment management and maintenance on the Department of all the trouble.
The new brand to open up new markets, must have: 1) good quality equipment (to be recognized in the market), 2) reasonable price (to be low), 3) satisfactory after-sales service (not cooperated, to find ways to prove).
Now buy equipment, the user (department) generally can not specify the brand, can only put forward the requirements, to achieve what purpose, with what function, specifically after the bidding or request for quotation to determine. So the department directly put forward to B brand guardianship is not the rules.
If you have confidence in the sales equipment, you can offer to let the hospital free trial to experience the superiority of the equipment and your after-sales service.
All things being equal, try your best! Of course, there may be other reasons, you know.