| 摘要 |
A catheter (10) useful for improving blood flow to a patient's heart has an elongated catheter body with a proximal end and a distal end. The elongated catheter body defines a catheter lumen. The elongated catheter body has an introducer distal portion (18) with a tissue piercing distal end (20). An ultrasound transducer is positioned in the introducer distal portion. |
