An apparatus includes a cannula (562), a suction port (572), and a guidewire channel (580). The cannula includes a proximal end, a distal end, and a first lumen. The suction port is configured to communicate suction to the distal end of the cannula via the first lumen. The guidewire channel (580) includes an open proximal end, an open distal end, and a second lumen extending from the open proximal end to the open distal end. The guidewire channel is securely attached to the cannula such that the second lumen is laterally offset from the first lumen. The guidewire channel (580) is configured to slidably receive a guidewire (590) within the second lumen. The guidewire channel is formed of an elastic material such that the guidewire channel is configured to resiliently expand the second lumen outwardly to an expanded state in response to slidably receiving a guidewire therein.
