| CPC A61B 17/32037 (2013.01) [A61B 17/22 (2013.01); A61B 17/22031 (2013.01); A61B 17/221 (2013.01); A61F 2/88 (2013.01); A61M 29/02 (2013.01); A61B 17/00008 (2013.01); A61B 2017/00252 (2013.01); A61B 2017/22034 (2013.01); A61B 2017/22077 (2013.01); A61B 2017/22094 (2013.01); A61B 2017/22095 (2013.01); A61B 2017/320056 (2013.01); A61B 2017/320064 (2013.01); A61B 2017/320733 (2013.01); A61B 2017/320741 (2013.01); A61M 25/0026 (2013.01); A61M 2025/006 (2013.01); A61M 2025/0197 (2013.01)] | 20 Claims |

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1. A method of facilitating treatment of a blood vessel, comprising:
advancing a guidewire between an intimal layer and an adventitial layer of the blood vessel past an occlusion disposed within a lumen of the blood vessel;
advancing a balloon catheter over the guidewire until a balloon disposed on a distal portion of the balloon catheter is disposed distal of the occlusion between the intimal layer and the adventitial layer; and
inflating the balloon between the intimal layer and the adventitial layer to radially displace a distal end of the balloon catheter towards the lumen of the blood vessel.
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