Prolapse detection and tool dislodgement detection
First Claim
1. An apparatus for detecting dislodgement of a medical tool from a reference location within a patient'"'"'s body, comprising:
- a localization system configured to output a location reading indicative of a location of the medical tool in a coordinate system based on a signal from a location sensor included in the medical tool, wherein said location reading comprises at least one of a position and orientation (P&
O); and
a control configured to determine a motion of the medical tool as a function of a plurality of said location readings, said control being further configured to determine when said determined medical tool motion satisfies predetermined tool motion conditions indicative of dislodgement based on at least one of said plurality of location readings of said medical tool and generating an alarm signal, wherein said predetermined motion conditions comprise at least a predetermined threshold distance beyond which the medical tool must move away from the reference location wherein the reference location within the patient'"'"'s body has a reference coordinate in said coordinate system, and wherein the reference location comprises an initial one of said medical tool location readings according to an initialization event, and wherein said control compares a medical tool coordinate and said reference coordinate with respect to said predetermined threshold distance to determine when said predetermined motion conditions are satisfied, said predetermined motion conditions are determined according to at least one factor selected from the group comprising a type of medical procedure, a type of medical tool, a parking position of the medical tool, and a preference of a physician.
2 Assignments
0 Petitions
Accused Products
Abstract
A tool dislodgement detection apparatus includes an MPS outputting position and orientation (P&O) readings for determining tool motion. A control generates an alarm based on the tool motion and dislodgement criteria. The criteria includes whether the tool motion meets a condition based on the type of medical procedure or tool, the tool parking position, a patient characteristic (e.g., age, weight, gender) or a physician preference. The criteria includes when the correlation between the tool motion and the cardiac, respiration and patient motion changes abruptly. In a prolapse detection apparatus, guidewire tip P&O readings determine a tip motion vector. The control generates an alarm using the motion vector and predetermined criteria. The criteria include a substantial change in the tip orientation not accompanied by a corresponding position change and a change in the motion vector by about 180° accompanied by a corresponding position change no greater than a threshold.
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Citations
25 Claims
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1. An apparatus for detecting dislodgement of a medical tool from a reference location within a patient'"'"'s body, comprising:
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a localization system configured to output a location reading indicative of a location of the medical tool in a coordinate system based on a signal from a location sensor included in the medical tool, wherein said location reading comprises at least one of a position and orientation (P&
O); anda control configured to determine a motion of the medical tool as a function of a plurality of said location readings, said control being further configured to determine when said determined medical tool motion satisfies predetermined tool motion conditions indicative of dislodgement based on at least one of said plurality of location readings of said medical tool and generating an alarm signal, wherein said predetermined motion conditions comprise at least a predetermined threshold distance beyond which the medical tool must move away from the reference location wherein the reference location within the patient'"'"'s body has a reference coordinate in said coordinate system, and wherein the reference location comprises an initial one of said medical tool location readings according to an initialization event, and wherein said control compares a medical tool coordinate and said reference coordinate with respect to said predetermined threshold distance to determine when said predetermined motion conditions are satisfied, said predetermined motion conditions are determined according to at least one factor selected from the group comprising a type of medical procedure, a type of medical tool, a parking position of the medical tool, and a preference of a physician. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for detecting dislodgement of a medical tool from a reference location corresponding to an anatomical location within a patient'"'"'s body, comprising:
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a localization system configured to output a tool location reading indicative of a location of the medical tool in a coordinate system wherein said tool location reading comprises at least one of a position and orientation (P&
O);at least one of (i) a patient reference sensor for affixation to the patient and configured to be coupled to said localization system to produce said plurality of patient reference sensor location readings indicative of patient respiration-induced and patient body movement-induced components of the reference location motion and (ii) an electrocardiogram monitor configured to produce said electrocardiogram signals indicative of a heartbeat-induced movement component of the reference location motion; a control configured to determine a motion of the medical tool as a function of a plurality of said tool location readings, said control being configured to determine a first correlation between the tool motion and the motion of the reference location during a learning stage when the medical tool is parked at the reference location, wherein the reference location within the patient'"'"'s body has a reference coordinate in said coordinate system, and wherein the reference location comprises an initial one of said medical tool location readings according to an initialization event, wherein said control is configured to determine said first correlation by calculating the first correlation between the tool location readings and said at least one of (i) said plurality of patient reference sensor location readings and (ii) said electrocardiogram signals wherein said control is further configured to determine said first correlation by comparing said plurality of said tool location readings and said at least one of said patient reference sensor location readings and said electrocardiogram signals relative to a common time-line, said control being further configured to determine, after the learning stage, a second correlation between the tool motion and reference location motion, said control being further configured to generate an alarm signal indicative of dislodgement when a comparison of the first correlation and the second correlation meets predetermined dislodgement detection criteria. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification