Elongated trapezoidal electrodes of a basket catheter and methods of making the same
The disclosed technology includes a medical probe comprising a tubular shaft extending along a longitudinal axis of the medical probe. The medical probe further comprises an expandable basket assembly coupled to the distal end of the tubular shaft. The basket assembly comprises a plurality of spines and a plurality of electrodes. The electrode comprises an electrode body that defines a lumen therethrough such that the respective spine extends through the lumen. The respective electrode body comprises two sections that define a lengthwise direction of the electrode body section that are inclined inward with respect to a central axis of the respective electrode.
1 . A medical probe, comprising:
a tubular shaft including a proximal end and a distal end, the tubular shaft extending along a longitudinal axis of the medical probe; and
an expandable basket assembly coupled to the distal end of the tubular shaft, the basket assembly comprising:
a plurality of spines extending along the longitudinal axis and converging at a central spine intersection, the central spine intersection comprising one or more cutouts that allows for the spines to bow radially outward from the longitudinal axis when the expandable basket assembly is transitioned from a collapsed form to an expanded form, each spine of the plurality of spines comprising a plurality of electrodes, the respective electrode comprising an electrode body that defines a lumen therethrough such that the respective spine extends through the electrode body lumen,
in which the respective electrode body comprises two sections that define a lengthwise direction of the electrode body that are inclined inward with respect to a central axis of the respective electrode.
2 . The medical probe according to claim 1 , wherein the respective electrode body lumen comprises a first electrode width that tapers inwardly with respect to the central axis of the respective electrode body to form a second electrode width such that the first electrode width is larger than the second electrode width.
3 . The medical probe according to claim 1 , wherein the respective electrode body comprises a curvature along the lengthwise direction of the electrode body.
4 . The medical probe according to claim 1 , wherein a cross-sectional shape of each electrode comprises a substantially trapezoidal shape.
5 . The medical probe according to claim 1 , wherein each respective spine of the plurality of spines comprises two electrodes.
6 . The medical probe according to claim 5 , wherein the two electrodes are offset with respect to electrodes between adjacent spines.
7 . A spine basket member comprising:
a plurality of spines extending radially from a longitudinal axis;
a plurality of electrodes comprising an electrode body that defines a lumen therethrough such that each spine of the plurality of spines extends through the lumen,
in which each electrode body comprises two opposing sections that define a lengthwise direction of the electrode body section that are inclined inwardly with respect to a central axis of the electrode body, and
in which a cross-section of each electrode body comprises a substantially trapezoidal shape; and
a plurality of electrically insulative jackets each disposed between a respective spine of the plurality of spines and a respective electrode of the plurality of electrodes, thereby electrically isolating the plurality of electrodes from the plurality of spines, wherein a cross-sectional shape of each electrically insulative jacket comprises a substantially trapezoidal shape.
8 . A spine basket member comprising:
a plurality of spines extending radially from a longitudinal axis and a cutout defining a first open area of empty space proximate the longitudinal axis, the first open area of empty space approximating a first virtual circle including a first diameter from the longitudinal axis, the cutout extending into each of the plurality of spines for a first length to define an open slot in each of the plurality of spines, each slot being contiguous to a circumference of a second virtual circle greater than the first virtual circle;
a plurality of electrodes comprising an electrode body that defines a lumen therethrough such that each spine of the plurality of spines extends through the lumen,
in which each electrode body comprises two opposing sections that define a lengthwise direction of the electrode body section that are inclined inwardly with respect to a central axis of the electrode body, and
in which a cross-section of each electrode body comprises a substantially trapezoidal shape; and
a plurality of electrically insulative jackets each disposed between a respective spine of the plurality of spines and a respective electrode of the plurality of electrodes, thereby electrically isolating the plurality of electrodes from the plurality of spines.
9 . The medical probe according to claim 1 , further comprising a plurality of electrically insulative jackets each disposed between a respective spine of the plurality of spines and a respective electrode of the plurality of electrodes, thereby electrically isolating the plurality of electrodes from the plurality of spines.
10 . The medical probe according to claim 9 , wherein a cross-sectional shape of each electrically insulative jacket comprises a substantially trapezoidal shape.
11 . The spine basket member of claim 8 , wherein one of every other slot on the plurality of spines includes an aperture defining a third area smaller than the first open area of empty space.
12 . A spine basket member comprising:
a plurality of spines extending radially from a longitudinal axis and a tadpole shaped cutout on each of the plurality of spines, each cutout including a head portion contiguous to a circumference of a first virtual circle with a first radius disposed about the longitudinal axis, the head portion defining a negative area approximating a second virtual circle with a second radius, the head portion connected to a slotted tail portion extending for a first length along the spine and contiguous to an inside circumference of a third virtual circle including a third radius;
a plurality of electrodes comprising an electrode body that defines a lumen therethrough such that each spine of the plurality of spines extends through the lumen,
in which each electrode body comprises two opposing sections that define a lengthwise direction of the electrode body section that are inclined inwardly with respect to a central axis of the electrode body, and
in which a cross-section of each electrode body comprises a substantially trapezoidal shape.
13 . The spine basket member according to claim 12 , further comprising a cutout disposed on the longitudinal axis to define a central negative area approximating a central circle including a central radius smaller than the first radius.
14 . The spine basket member according to claim 12 , in which the cutout defines a comet-shaped cutout with head portion with a slotted tapered tail extending to a proximal portion of each spine.
15 . The spine basket member according to claim 12 , further comprising a plurality of electrically insulative jackets each disposed between a respective spine of the plurality of spines and a respective electrode of the plurality of electrodes, thereby electrically isolating the plurality of electrodes from the plurality of spines.
16 . The spine basket member according to claim 15 , wherein a cross-sectional shape of each electrically insulative jacket comprises a substantially trapezoidal shape.