Abstract: A facility for distributing electronic coupons is described. The facility presents to a user indications of each of at least one coupon pack. Each coupon pack comprises a plurality of independently-redeemable electronic coupons. The facility receives user input selecting an indicated coupon pack, and uses payment information associated with the user to collect a price indicated for the selected coupon pack. The facility then makes the selected coupon pack available for use by the user such that the user may redeem any of the electronic coupons of the selected coupon pack.

Abstract: A tibial resection guide for use in preparing a knee joint for implantation of a prosthesis, includes an alignment rod which can be positioned against the tibia, which can be fastened to the tibia towards its distal end, and which has a proximal slot formed in it extending substantially parallel to the axis of the alignment rod. A cutting block is provided at the proximal end of the alignment rod having a saw guide slot in it to guide a saw during resection of the patient's tibia. A guide pin can be fastened into the tibia, with the slot in the alignment rod being a sliding fit over the guide pin. The cutting block, or the alignment rod towards its proximal end, has fixation holes for receiving fixation pins, to fix the cutting block and the alignment rod against further movement relative to the guide pin.