Catheter or guidewire device including flow sensing and use thereof
First Claim
Patent Images
1. A method of performing a medical treatment procedure on a tissue, the method comprising:
- disposing in proximity to the tissue an apparatus comprising;
an elongated member having a proximal portion and a distal portion;
at least one flow sensor disposed proximate to the distal portion of the elongated member, each of the at least one flow sensor comprising;
at least one temperature sensor; and
at least one heating element disposed proximate to the at least one temperature sensor;
a reference temperature sensor disposed on a proximal portion of the elongated member; and
a control module coupled to the at least one flow sensor and the reference temperature sensor;
using the control module to maintain a temperature difference between the reference temperature sensor and the temperature sensor of the at least one flow sensor at a stage of performance of the medical treatment procedure, comprising;
monitoring a value of a temperature measurement of the reference temperature sensor and/or a temperature measurement of the temperature sensor of the at least one flow sensor; and
controlling a first signal to the at least one heating element to cause the at least one heating element to emit heat or discontinue emitting heat, such that that the temperature difference is maintained,wherein the temperature difference is a constant temperature difference or a time varying temperature difference.
4 Assignments
0 Petitions
Accused Products
Abstract
Devices and methods are provided for performing procedure on tissue with flow monitoring using flow sensors. The devices include an elongated member, and at least one flow sensor disposed on the elongated member. The flow sensor includes at least one temperature sensor and at least one heating element having a cavity. At least a portion of the at least one temperature sensor is housed in the cavity. A temperature measurement of the temperature sensor provides an indication of the flow rate of a fluid proximate to the flow sensor.
285 Citations
61 Claims
-
1. A method of performing a medical treatment procedure on a tissue, the method comprising:
-
disposing in proximity to the tissue an apparatus comprising; an elongated member having a proximal portion and a distal portion; at least one flow sensor disposed proximate to the distal portion of the elongated member, each of the at least one flow sensor comprising; at least one temperature sensor; and at least one heating element disposed proximate to the at least one temperature sensor; a reference temperature sensor disposed on a proximal portion of the elongated member; and a control module coupled to the at least one flow sensor and the reference temperature sensor; using the control module to maintain a temperature difference between the reference temperature sensor and the temperature sensor of the at least one flow sensor at a stage of performance of the medical treatment procedure, comprising; monitoring a value of a temperature measurement of the reference temperature sensor and/or a temperature measurement of the temperature sensor of the at least one flow sensor; and controlling a first signal to the at least one heating element to cause the at least one heating element to emit heat or discontinue emitting heat, such that that the temperature difference is maintained, wherein the temperature difference is a constant temperature difference or a time varying temperature difference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A method of determining an efficacy of a medical treatment procedure performed on a tissue, the method comprising:
-
A) disposing in proximity to the tissue an apparatus comprising; an elongated member having a proximal portion and a distal portion; at least one flow sensor disposed proximate to the distal portion of the elongated member, and at least one component coupled to the elongated member to perform a treatment procedure on a portion of the tissue proximate to the elongated member; B) activating the at least one component to perform the treatment procedure on the portion of the tissue; C) using the at least one flow sensor to perform at least one flow measurement, the at least one flow measurement providing data indicative of a change in the flow subsequent to the treatment procedure of a fluid proximate to the apparatus; D) analyzing the data indicative of the flow of the fluid to determine at least one time-constant associated with the data; and E) comparing the at least one time-constant associated with the data to a time-constant indicative of the flow of the fluid prior to performance of the treatment procedure, wherein a difference provides an indication of the efficacy of the treatment procedure. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
-
-
25. A method of monitoring a hemodynamic effect during a medical treatment procedure performed on a vascular tissue, the method comprising:
-
A) disposing in proximity to the tissue an apparatus comprising; an elongated member having a proximal portion and a distal portion; at least one flow sensor disposed proximate to the distal portion of the elongated member, and at least one component coupled to the elongated member to perform a medical treatment procedure on a portion of the tissue proximate to the elongated member; B) activating the at least one component to perform the medical treatment procedure on the portion of the tissue; C) administering a substance that causes a change in dimension of the vascular tissue; D) using the at least one flow sensor to perform at least one flow measurement, the at least one flow measurement providing data indicative of a change in the flow subsequent to the medical treatment procedure of a fluid proximate to the apparatus; E) analyzing the data indicative of the flow of the fluid to determine at least one parameter indicative of the change in the hemodynamics of the fluid, wherein a reduction in the change in the hemodynamics of the fluid provides an indication of the efficacy of the medical treatment procedure. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
-
-
37. A method of performing a medical treatment procedure on a tissue, the method comprising:
-
disposing in proximity to the tissue an apparatus comprising; an elongated member having a proximal portion and a distal portion; at least one flow sensor disposed proximate to the distal portion of the elongated member, each of the at least one flow sensor comprising; at least one temperature sensor; and at least one heating element disposed proximate to the at least one temperature sensor; a reference temperature sensor disposed on a proximal portion of the elongated member; a control module coupled to the at least one flow sensor and the reference temperature sensor; and at least one component to perform an ablation procedure on a portion of the tissue; using the control module to maintain a temperature difference between the reference temperature sensor and the temperature sensor of the at least one flow sensor at a stage of performance of the medical treatment procedure, comprising; monitoring a value of a temperature measurement of the reference temperature sensor and/or a temperature measurement of the temperature sensor of the at least one flow sensor; controlling a first signal to the at least one heating element to cause the at least one heating element to emit heat or discontinue emitting heat, such that that the temperature difference is maintained. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
-
-
50. A method of performing a medical treatment procedure on a tissue, the method comprising:
-
disposing in proximity to the tissue an apparatus comprising; an elongated member having a proximal portion and a distal portion; at least one flow sensor disposed proximate to the distal portion of the elongated member, each of the at least one flow sensor comprising; at least one temperature sensor; and at least one heating element disposed proximate to the at least one temperature sensor; a reference temperature sensor disposed on a proximal portion of the elongated member; and a control module coupled to the at least one flow sensor and the reference temperature sensor; using the control module to maintain a temperature difference between the reference temperature sensor and the temperature sensor of the at least one flow sensor at a stage of performance of the medical treatment procedure, comprising; monitoring a value of a temperature measurement of the reference temperature sensor and/or a temperature measurement of the temperature sensor of the at least one flow sensor; controlling a first signal to the at least one heating element to cause the at least one heating element to emit heat or discontinue emitting heat, such that that the temperature difference is maintained, wherein the first signal to the at least one heating element is a time-varying voltage signal. - View Dependent Claims (51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61)
-
Specification