TROCAR-CANNULA COMPLEX, CANNULA AND METHOD FOR DELIVERING FLUIDS DURING MINIMALLY INVASIVE SURGERY

摘要

A fluid delivery cannula (16) which provides an interface between an access point or port (40) in the body of a patient and a working channel which may receive tools or instruments (12) used during minimally invasive surgery. The cannula (16) allows introduction of fluid(s) at the port site (40), or another site within the body of the patient. The fluid delivery cannula (16) can releasably attach to a hub (14) associated with a trocar assembly (12) or may be integrally formed with at least a portion of the hub (14). In one form, an inner cannula member (26) includes a grooved outer surface to define multiple fluid passages (62, 64, 66, 68, 70) and a perforated outer layer (24) is placed over the inner cannula member (26). Another form provides an expandable sleeve (200) that may itself comprise a cannula through which a trocar or trocar assembly (12) is inserted or which may take place of the perforated outer layer (24) of the grooved cannula (16).