A device or substance (e.g., a breast implant material) can be introduced through a port placed in a skin incision. A blunt blade can extend laterally with respect to a distal opening of the port. The blade can be rotated with respect to the port beneath a layer of skin, such as to separate the skin from underlying tissue. A device or substance can be introduced through a proximal port opening and then through a distal port opening and into the subject via a channel provided by the port. Rotating the blade can include rotating a first blade with respect to a second blade, such as can be performed by a user with one hand manipulating handles associated with the device.
