| 主权项 |
1. A method of accessing a branch vessel of the abdominal aorta of a patient, comprising:
advancing a catheter body in an insertable configuration into an artery of an arm of the patient and through the body of the patient towards and into the abdominal aorta, the catheter body and configurable from the insertable configuration to a preformed configuration; configuring a distal segment of the catheter body into the preformed configuration, wherein the distal segment in the preformed configuration has a length that includes a first substantially straight portion, a laterally extending portion, a tip-opposing portion, a tip-deflecting portion, and a distal tip, wherein the first substantially straight portion has a longitudinal axis, wherein the laterally extending portion is positioned distally of the first substantially straight portion along the length of the distal segment and extends laterally away from the longitudinal axis, wherein the tip-opposing portion is positioned distally of the laterally extending portion along the length of the distal segment and extends substantially parallel to and offset from the longitudinal axis, wherein the tip-deflecting portion is positioned distally of the tip-opposing portion along the length of distal segment and extends laterally past the longitudinal axis, wherein the distal tip is positioned distally of the tip-deflecting portion along the length of the distal segment and is diametrically opposed to the tip-opposing portion relative to the longitudinal axis, wherein the tip-deflecting portion deflectably supports the distal tip relative to the tip-opposing portion so that the distal tip is deflectable towards the tip-opposing portion upon an external force; and positioning the distal tip within the branch vessel of the abdominal aorta. |
