MICROFABRICATED CARDIAC SENSOR WITH TACTILE FEEDBACK AND METHOD AND APPARATUS FOR CALIBRATING THE SAME USING A PLURALITY OF SIGNALS
First Claim
1. A method for calibrating a catheter with a microfabricated transducer arranged and constructed to sense the physical activity of the heart comprising the steps of:
- inserting said catheter about the heart;
making a set of measurements taken from said catheter through said microfabricated transducer; and
comparing said measurements with analogous data obtained from external means.
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Abstract
A plurality of sensor data acquired from the heart using novel microfabricated sensors is compared to analogous data derived by conventional imaging modalities extrinsic to the heart. The cross-correlation of corresponding signals facilitates the development of sensor nanotechnologies including a catheter for performing ablation of cardiac arrhythmias and a biocompatible electrical interface with monitoring capabilities. Cross-correlation of data acquired with differing techniques enables system calibration and design, as well as, validation of the data acquired with next generation sensors. In a preferred mode of the invention, novel cardiac nanosensors enable an operator to differentiate one individual patient'"'"'s cardiac tissue mechanical properties from others by using a sense of touch much as clinicians today use auditory cues with a stethoscope.
70 Citations
22 Claims
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1. A method for calibrating a catheter with a microfabricated transducer arranged and constructed to sense the physical activity of the heart comprising the steps of:
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inserting said catheter about the heart; making a set of measurements taken from said catheter through said microfabricated transducer; and comparing said measurements with analogous data obtained from external means. - View Dependent Claims (2, 3, 4, 9, 10)
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5. A method of making a cardiac sensor comprising:
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providing an elongated catheter constructed and arranged for insertion about the heart; and attaching a cardiac motion sensor at said distal end, said cardiac sensor providing tactile feedback based on local conditions at said motion sensor. - View Dependent Claims (6, 7, 8, 11, 12, 13, 22)
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14. A method for designing a haptic control system contained within the handle of a catheter or virtual catheter for a cardiac sensor comprising providing an elongated catheter with a distal end, and providing said distal end with a microfabricated sensor that generates signals indicative of one or more dimensional motion sensed by said sensor;
- and providing a response element that simulates the real time multi-dimensional motion of the distal end.
- View Dependent Claims (15)
- 16. A method of constructing an cardiac sensor comprising providing an elongated member having a distal end arranged and constructed for insertion about the heart and providing said distal end with a piezoelectric sensor generating an electrical signal proportional to the degree of sensor deformation along multiple vectors, wherein said electrical signal provides tactile feedback.
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19. An intra-cardiac delivery system comprising a needle arranged and constructed for puncturing the interatrial septum, said needle including an element having piezoelectric properties and generating an electrical signal related to a force upon the distal aspect of the needle.
- 20. A handheld delivery system comprising a needle having a piezoelectric sensor generating an electric signal related to a force applied to a tip of the needle and a haptic control system having a stimulator receiving said electrical signal and generating sensory signals corresponding to said force.
Specification