Reposable multi-fire surgical clip applier

A reposable surgical clip applier, comprising:

• a handle assembly, including:
• a housing;
• at least one handle extending from the housing and movable relative to the housing between a spaced-apart position and an approximated position;
• and
• an inner actuation assembly extending from the housing and operably coupled to the at least one handle, the inner actuation assembly including:
• a proximal drive member movable through the housing;
• a proximal pusher bar movable through the proximal drive member, wherein movement of the at least one handle relative to the housing is configured to move the proximal drive member and the proximal pusher bar in relative opposing directions;
• and
• a proximal biasing member disposed about the proximal drive member between a proximal end portion of the housing and a proximal end portion of the proximal drive member, the proximal biasing member having a bias configured to move the proximal drive member proximally such that the proximal pusher bar is moved distally;
• a shaft assembly releasably engagable with the handle assembly, the shaft assembly including:
• an outer tube;
• a jaw assembly supported at a distal end portion of the outer tube;
• and
• an inner drive assembly slidably disposed within the outer tube and operably coupled to the jaw assembly such that distal movement of the inner drive assembly through the outer tube actuates the jaw assembly;
• and
• a clip cartridge assembly releasably engagable within the shaft assembly, the clip cartridge assembly retaining a stack of surgical clips therein and including a distal pusher operably coupled to a distal-most surgical clip of the stack of surgical clips such that distal movement of the distal pusher loads the distal-most surgical clip into the jaw assembly when the clip cartridge assembly is releasably engaged within the shaft assembly,
• wherein, when the shaft assembly is releasably engaged with the handle assembly and the clip cartridge assembly is releasably engaged within the shaft assembly:
• the proximal drive member is positioned proximally adjacent the inner drive assembly such that movement of the at least one handle towards the approximated position actuates the jaw assembly, and
• the proximal pusher bar is positioned proximally adjacent the distal pusher such that movement of the at least one handle towards the spaced-apart position loads the distal-most surgical clip into the jaw assembly.