A collection of sterile devices intended to assist the surgical introduction of an implantable cardiothoracic device (e.g., implantable cardiac monitor) within a subcutaneous cavity in the thorax; it is not intended for implantation within an organ (i.e., heart, lungs or blood vessels). It includes an implant introducer and at least one additional invasive device (e.g., scalpel). This is a single-use device.