Catheter construction
Polymeric tubing, for use with catheters or other medical devices, where the polymeric tubing can have regions of customized properties including, but not limited to, durometer, torque control, flexibility, axial strength, stiffness, etc. One variation of the device allows for transitions between regions to be configured such that there can be gradual or customized transitions between various regions such that the structural characteristics differential between the regions are selectively designed. Additional variations include outer layers having a plurality of material sections extending in a spiral direction along the axial length to form a continuous wall of the outer layer. In certain variations, the structural characteristic differential is minimized or eliminated as compared to conventional catheters.
1 . A catheter tubing comprising:
a tubular body having at least a first axial region and a second axial region;
a first material section and one or more adjacent materials extending spirally along the first axial region, where the first material section and one or more adjacent materials form an outermost layer of the tubular body in the first axial region; and
a second material section and the one or more adjacent materials extending spirally along the second axial region, where the second material section and the one or more adjacent materials form the outermost layer of the tubular body in the second axial region;
wherein a first structural property of the first material section is different than a structural property of the one or more adjacent materials and a second structural property of the second material section is different than both the first structural property and the structural property of the one or more adjacent materials.
2 . The catheter tubing of claim 1 , where the tubular body further comprises an inner liner and a reinforcement structure exterior to the inner liner.
3 . The catheter tubing of claim 1 , further comprising a first lengthwise region located between the first axial region and the second axial region, where a width of the first material section and a width of the second material section changes along the first lengthwise region.
4 . The catheter tubing of claim 3 , wherein the width of the first material section and the width of the second material section inversely change along the first lengthwise region such that as the width of the first material section increases or decrease, the width of the second material section decreases or increases respectively.
5 . The catheter tubing of claim 1 , wherein the tubular body includes a proximal lengthwise region that is entirely formed from a single material.
6 . The catheter tubing of claim 1 , wherein the tubular body includes a distal lengthwise region that is entirely formed from a single material.
7 . The catheter tubing of claim 1 , where the one or more adjacent materials includes a third material section extending along the first axial region and the second axial region.
8 . The catheter tubing of claim 7 , wherein the tubular body includes a distal lengthwise region that is entirely formed from the third material section.
9 . The catheter tubing of claim 7 , where a structural property of the third material section differs from both the structural property of the first material section and the structural property of the second material section.
10 . The catheter tubing of claim 7 , where a structural property of the third material section is the same as the structural property of the first material section.
11 . The catheter tubing of claim 7 , wherein the third material section extends over an entirety of an axial length of the tubular body.
12 . The catheter tubing of claim 1 , wherein a width of the first material section is different than a width of the second material section in at least a portion of the tubular body.
13 . The catheter tubing of claim 1 , wherein in at least the first axial region, the tubular body comprises at least three or more distinct material sections.
14 . The catheter tubing of claim 1 , wherein a spiral direction of the first material section and the second material section comprises a right-hand wind.
15 . The catheter tubing of claim 1 , wherein a spiral direction of the first material section and the second material section comprises a left-hand wind.