Patent ID: 8348824

Claim:
An elongated catheter, comprising: proximal and distal ends; the elongated catheter having a substantially circular cross-section; an anchor disposed on the distal end of the elongated catheter configured to establish a secure relationship between the elongated catheter and an anatomical feature; graduated markings disposed along a length of the catheter; and outer and inner surfaces defining a catheter wall, wherein the outer surface of the catheter wall is configured for contacting a body lumen and wherein the inner surface of the catheter wall defines a main lumen disposed along a length of the elongated catheter, the catheter wall having an approximately 60° arc-shaped transparent window along a length of the elongated catheter to provide visualization of the graduated markings via a visualization tool positioned in the main lumen, wherein a remaining 300° arc-shaped section of the catheter wall is substantially opaque and formed of a radiation attenuating material to reduce or block radiation from a radiation source disposed within the catheter.