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Manual Pullback Recommendation

IP.com Disclosure Number: IPCOM000239078D
Publication Date: 2014-Oct-09
Document File: 2 page(s) / 18K

Publishing Venue

The IP.com Prior Art Database

Related People

Gerald Cabrera: AUTHOR

Abstract

Information about the location of a catheter tip within the body is valuable for preforming Intra-Vascular UltraSound imaging (IVUS), as is true for a pressure guide wire relaying relevant physiologic information about the vessel. A medical ultrasonic imaging/pressure or flow measurement device utilizes a catheter/guidewire that is insertable into a patient and an ultrasonic transducer array is located at or near its distal end. Radiopaque markers or a position sensor is used to track the position of the catheter/guidewire. Upon pullback of the catheter/guidewire, the positional information is utilized to produce an image representation (e.g. 2D or 3D representation) or physiologic representation of the inside of the artery.

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Manual Pullback Recommendation

September 2014

Volcano Corporation, San Diego, CA

Introduction

Information about the location of a catheter tip within the body is valuable for preforming Intra-Vascular UltraSound imaging (IVUS), as is true for a pressure guide wire relaying relevant physiologic information about the vessel. A medical ultrasonic imaging/pressure or flow measurement device utilizes a catheter/guidewire that is insertable into a patient and an ultrasonic transducer array is located at or near its distal end. Radiopaque markers or a position sensor is used to track the position of the catheter/guidewire. Upon pullback of the catheter/guidewire, the positional information is utilized to produce an image representation (e.g. 2D or 3D representation) or physiologic representation of the inside of the artery.

Keywords: Pullback, Guidewire, Catheter, IVUS, Intra-vascular ultrasound, Recommendation, Feedback


Manual Pullback Recommendation

A catheter/guidewire system and method includes generating accurate two-dimensional and/or three-dimensional reconstruction of a body vessel. The method may employ X-ray in combination with intravascular ultrasound (IVUS). The IVUS information represents a tubular stack of cross-sections and a 3-D path of the catheter axis may be reconstructed from two X-ray images, after which the auto-generated border contours on the stack of IVUS images is wrapped around this 3-D catheter centerline. This requires measuring the position of the tip of a catheter/guidewire which includes continuously monitoring the distance the catheter/guidewire has travelled past a reference point, monitoring the orientation of the tip, and reconstructing the trajectory of the tip.

The pullback of the catheter/guidewire may be performed manually or automatically. Radiopaque markers or some other means of communicating location, such as a position sensor, aid to provide positional feedback during pullback. In the case of a manual pullback, radiopaque markers are used. A calibrated distance between markers serves as a means to provide positional feedback such that the X-ray image can be used to reconstruct an image of the pullback path taken in the artery. Manual pullback with a positon sensor allows positional information of the catheter/guide-wire to be recorded, and the display of the “distance traveled” may be displayed on a screen. Thus, a more accurate reconstruction of 2D or 3D image and a real-time display of the longitudinal cross-sections of the vessel may be achieved. The distance travelled may be indicated on the display. The marker or position sensor performs a...