Cutting device and related systems and methods

A kit, comprising:

• a dilator including a proximal hub and a tapered distal portion, the dilator disposable about a wire that has been inserted into a puncture site formed in tissue;
• and
• a cutting device reversibly coupleable to the dilator, the cutting device including:
• a housing;
• a set of couplers configured to reversibly couple the cutting device to the dilator;
• a cutting element including an inner edge and an outer edge, the cutting element movable between a fully retracted position and a fully extended position,
• the cutting element in the fully retracted position being disposed within the housing,
• the cutting element in the fully extended position having a distal end that extends distally from the housing with (1) the inner edge extendable along the tapered distal portion of the dilator to a tip of the dilator and (2) the outer edge configured to form an incision in the tissue that extends from the puncture site, the outer and inner edges of the cutting element extending toward a longitudinal axis of the dilator when the cutting device is coupled to the dilator,
• the cutting element configured to be disposed radially outward from a lumen of the dilator in the fully retracted and fully extended positions;
• and
• a sliding actuator supported by the housing, the sliding actuator configured to move the cutting element into the extended position when the cutting device is coupled to the dilator and the dilator is disposed about the wire such that the cutting element can form the incision.

A kit, comprising:

• a dilator including a proximal hub, an elongate body, and a tapered distal portion, the dilator disposable about a wire that has been inserted into a puncture site formed in tissue;
• and
• a cutting device reversibly coupleable to the dilator, the cutting device including:
• a housing;
• a set of couplers configured to (1) couple to the elongate body of the dilator and (2) decouple from the elongate body of the dilator when the dilator is disposed about the wire and the cutting device is moved laterally away from a longitudinal axis of the dilator;
• a cutting element movable between (1) a fully retracted position in which the cutting element is disposed within the housing and (2) a fully extended position in which a distal end of the cutting element extends distally from the housing and is configured to form an incision in the tissue that extends from the puncture site, the cutting element configured to be disposed radially outward from a lumen of the dilator in the fully retracted and fully extended positions;
• and
• a spring configured to apply a force on the cutting element such that the cutting element is pressed against an outer surface of the tapered distal portion of the dilator when the cutting device is coupled to the dilator and the cutting element is in the fully extended position.

A kit, comprising:

• a dilator including a proximal hub and an elongate body, the dilator disposable about a wire that has been inserted into a puncture site formed in tissue;
• and
• a cutting device reversibly coupleable to the dilator, the cutting device including:
• a housing;
• a set of couplers configured to (1) couple to the elongate body of the dilator and (2) decouple from the elongate body of the dilator when the dilator is disposed about the wire and the cutting device is moved laterally away from a longitudinal axis of the dilator;
• and
• a cutting element movable between (1) a fully retracted position in which the cutting element is disposed within the housing and (2) a fully extended position in which a distal end of the cutting element extends distally from the housing and is configured to form an incision in the tissue that extends from the puncture site, the cutting element configured to be disposed radially outward from a lumen of the dilator in the fully retracted and fully extended positions, the cutting element including outer and inner edges that extend toward the longitudinal axis of the dilator when the cutting device is coupled to the dilator.