A micropuncture kit for direct access into a lumen of a surgically exposed vessel using direct visual guidance, the kit comprising: a micropuncture access needle comprising a proximal hub coupled to an elongate shaft defining an inner lumen and a visible depth indicator positioned on the elongate shaft a distance away from a distal tip of the elongate shaft, wherein the visible depth indicator of the micropuncture access needle provides an indication as to whether a microcatheter, when inserted into the vessel, will penetrate a wall thickness of the vessel without contacting a back side of a vessel wall of the blood vessel; an access guidewire sized to be received through the inner lumen of the micropuncture access needle, the guidewire comprising a distal tip and at least one visible depth indicator positioned on the access guidewire a distance away from the distal tip of the guidewire; and a microaccess cannula comprising an elongate body defining an inner lumen and a plurality of visible depth indicators formed on the elongate body, wherein each of the plurality of visible depth indicators identifies a distance from a distal tip of the cannula wherein alignment of a first visible depth indicator of the at least one visible depth indicator positioned on the access guidewire with a proximal edge of the cannula provides a visual indication to a user that the distal tip of the guidewire is aligned with the distal tip of the cannula; wherein alignment of a second visible depth indicator of the at least one visible depth indicator positioned on the access guidewire with a proximal edge of the cannula provides a visual indication to a user that the distal tip of the guidewire is aligned with the distal tip of the micropuncture access needle; wherein alignment of a third visible depth indicator of the at least one visible depth indicator positioned on the access guidewire with a proximal edge of the cannula provides a visual indication to a user that the distal tip of the guidewire is positioned distally of the distal tip of the micropuncture access needle by a predetermined distance indicated by the third visible depth indicator. a micropuncture access needle comprising a proximal hub coupled to an elongate shaft defining an inner lumen and a visible depth indicator positioned on the elongate shaft a distance away from a distal tip of the elongate shaft, wherein the visible depth indicator of the micropuncture access needle provides an indication as to whether a microcatheter, when inserted into the vessel, will penetrate a wall thickness of the vessel without contacting a back side of a vessel wall of the blood vessel; an access guidewire sized to be received through the inner lumen of the micropuncture access needle, the guidewire comprising a distal tip and at least one visible depth indicator positioned on the access guidewire a distance away from the distal tip of the guidewire; and a microaccess cannula comprising an elongate body defining an inner lumen and a plurality of visible depth indicators formed on the elongate body, wherein each of the plurality of visible depth indicators identifies a distance from a distal tip of the cannula wherein alignment of a first visible depth indicator of the at least one visible depth indicator positioned on the access guidewire with a proximal edge of the cannula provides a visual indication to a user that the distal tip of the guidewire is aligned with the distal tip of the cannula; wherein alignment of a second visible depth indicator of the at least one visible depth indicator positioned on the access guidewire with a proximal edge of the cannula provides a visual indication to a user that the distal tip of the guidewire is aligned with the distal tip of the micropuncture access needle; wherein alignment of a third visible depth indicator of the at least one visible depth indicator positioned on the access guidewire with a proximal edge of the cannula provides a visual indication to a user that the distal tip of the guidewire is positioned distally of the distal tip of the micropuncture access needle by a predetermined distance indicated by the third visible depth indicator.