Ion-tab-button with routeParams

How can I use routeParams in [tab] on a ion-tab-button?
I’ve tried using something like this:

<ion-tab-button [tab]="'patient/' + i"></ion-tab-button>

This works fine for the routing to the tab. But the tab is not recognized als active.
Same when using [routerLink] instead of [tab].
What is the right way to provide the patientId to the route on ion-tab-button?