What are the principles governing particulars in medical malpractice cases?

The principles governing particulars are summarized by Kirkpatrick J., as she then was, in Hoy and Steeds v. Medtronic, 2002 BCSC 1648, at pp. 10-12. I will not read them all in, but it is important to highlight the principle at para. 22, sub point (g) of the decision: The fact that the particulars sought are known (or even best known) to the demanding party is not a reason to refuse particulars. Particulars of such allegations should still be provided if the party of whom the demand is made is in a position to give them.