Assistive manual zeroing visualization

• US 10,327,744 B2
• Filed: 06/26/2014
• Issued: 06/25/2019
• Est. Priority Date: 06/26/2014
• Status: Active Grant

• Current Assignee: Biosense Webster Incorporated (Johnson & Johnson)
• Original Assignee: Biosense Webster Incorporated (Johnson & Johnson)
• Inventors: Katz, Natan Sharon, Turgeman, Aharon, Ludwin, Doron Moshe, Krupnik, Ronen
• Primary Examiner(s): Moher, Amanda Lauritzen
• Assistant Examiner(s): McDonald, Katherine M
• Application Number:
  US14/315,408
• Publication Number:
  US 20150374448A1
• Time in Patent Office: 1,825 Days
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 18/1492 having a flexible, catheter-like structure, e.g. for heart ablation A61B18/1477 takes precedence
• CPC Class Codes: A61B 2017/00243 cardiac
• CPC Class Codes: A61B 2017/00725 Calibration or performance testing
• CPC Class Codes: A61B 2018/00357 Endocardium
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/00839 Bioelectrical parameters, e.g. ECG, EEG
• CPC Class Codes: A61B 2034/2051 Electromagnetic tracking systems
• CPC Class Codes: A61B 2034/2065 Tracking using image or pattern recognition
• CPC Class Codes: A61B 2090/064 for measuring force, pressure or mechanical tension
• CPC Class Codes: A61B 2090/065 for measuring contact or contact pressure
• CPC Class Codes: A61B 2090/374 NMR or MRI
• CPC Class Codes: A61B 34/20 Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
• CPC Class Codes: A61B 90/06 Measuring instruments not otherwise provided for

Abstract

A probe having a contact force sensor is inserted into a cardiac chamber and an image of the blood pool is generated. A portion of the blood pool is removed from the image to retain a remaining portion of the blood pool. A determination is made that the distal segment of the probe is within the remaining portion of the blood pool, and responsively to the determination the contact force sensor is manually zeroed.

Claims

1. An apparatus, comprising:

a probe, configured for insertion into a body cavity having a blood pool and an endocardial surface of a patient and comprising a contact force sensor for measuring a force applied to the contact force sensor and location sensors for detecting a location of the probe in the body cavity; and

a processor, which is configured to receive a plurality of measurements from the contact force sensor and the location sensors, the processor configured to;

define the blood pool and generating an image of the body cavity showing the blood pool and the endocardial surface;

determine a first portion of the blood pool adjacent the endocardial surface to be removed from the image, the portion being a predetermined distance from the endocardial surface;

remove the first portion of the blood pool from the image to retain a remaining portion of the blood pool thereon;

regenerate the image to present the remaining portion of the blood pool and a location of a distal segment of the probe relative to the remaining portion on the image;

make a determination from the image that the distal segment of the probe is within the remaining portion of the blood pool; and

responsively to the determination enable manual zeroing of the contact force sensor.

2. The apparatus according to claim 1, wherein the predetermined distance from the endocardial surface determined by the processor comprises a 10 mm zone adjacent an endocardial surface of a heart.

3. The apparatus according to claim 1, wherein the predetermined distance from the endocardial surface determined by the processor comprises a 10-13 mm zone adjacent an endocardial surface of a heart.

4. The apparatus according to claim 1, wherein the processor is further configured to:

detect a location of a second probe in the body cavity; and

determine a second portion of the blood pool adjacent the second probe to be removed from the image, the portion being a predetermined distance from the second probe;

wherein both the first and second portions of the blood pool are removed from the image to retain the remaining portion of the blood pool thereon.

5. The apparatus according to claim 4, wherein the predetermined distance from the second probe determined by the processor is 3 mm in thickness.

6. The apparatus according to claim 4, wherein the predetermined distance from the second probe determined by the processor is 3-6 mm in thickness.

7. The apparatus according to claim 4, further comprising the second probe, wherein the image includes the second probe.

8. The apparatus of claim 1, wherein when the processor is further configured to:

determine that the distal segment of the probe is located outside the remaining portion of the blood pool; and

alert an operator that the probe is not located within the remaining portion of the blood pool.

9. The apparatus of claim 1, wherein the processor is further configured to:

determine that the distal segment of the probe is located outside the remaining portion of the blood pool; and

disable the ability of the operator to perform manual contact force zeroing.