Balloon dilation probe
First Claim
Patent Images
1. A balloon coronary angioplasty probe comprising:
- an elongate, flexible, tubular proximal segment having a proximal end and a distal end;
an elongate distal segment including a support wire having a smaller diameter than the outer diameter of the distal end of the proximal segment, the support wire being connected to the proximal segment and extending distally beyond the distal end of the proximal segment, the support wire being shorter and more flexible than the proximal segment;
a balloon supported on the probe about the support wire with the support wire extending through the balloon, the distal end of the balloon being attached to the distal segment of the probe;
the tubular proximal segment defining a lumen for communicating the proximal end of the probe with the interior of the balloon to enable inflation and deflation of the balloon;
a sleeve extending about the support wire, the sleeve being connected at its distal end to the proximal end of the balloon and at its proximal end to the distal end of the proximal segment;
said sleeve communicating the interior of the balloon with the lumen of the proximal tubular segment;
the proximal segment being sufficiently torsionally rigid so that when the probe is in a configuration corresponding to that of a human aortic arch and with the distal segment at least in part in a coronary artery, the probe is capable of transmitting controllably from its proximal to its distal end rotation applied at the proximal end.
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Abstract
Probe-like catheter has a small diameter and can be steered to and passed through narrow stenoses. The probe has a balloon at its distal end which is collapsible to a low profile to enable it to be passed through the stenosis. The probe may include a distal tip which can hold a preset curve. The probe is sufficiently rigid to enable the transmission of torque to the distal end to permit steering of the probe by controllably rotating the proximal end of the probe.
In use, a stenosis which cannot be crossed by a more conventional sized dilatation catheter may permit passage of the dilatation probe.
166 Citations
21 Claims
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1. A balloon coronary angioplasty probe comprising:
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an elongate, flexible, tubular proximal segment having a proximal end and a distal end; an elongate distal segment including a support wire having a smaller diameter than the outer diameter of the distal end of the proximal segment, the support wire being connected to the proximal segment and extending distally beyond the distal end of the proximal segment, the support wire being shorter and more flexible than the proximal segment; a balloon supported on the probe about the support wire with the support wire extending through the balloon, the distal end of the balloon being attached to the distal segment of the probe; the tubular proximal segment defining a lumen for communicating the proximal end of the probe with the interior of the balloon to enable inflation and deflation of the balloon; a sleeve extending about the support wire, the sleeve being connected at its distal end to the proximal end of the balloon and at its proximal end to the distal end of the proximal segment; said sleeve communicating the interior of the balloon with the lumen of the proximal tubular segment; the proximal segment being sufficiently torsionally rigid so that when the probe is in a configuration corresponding to that of a human aortic arch and with the distal segment at least in part in a coronary artery, the probe is capable of transmitting controllably from its proximal to its distal end rotation applied at the proximal end. - View Dependent Claims (2, 3, 4, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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5. A balloon coronary angioplasty probe comprising:
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an elongate, flexible, tubular proximal segment having a proximal end and a distal end; an elongate distal segment including a support wire having a smaller diameter than the outer diameter of the distal end of the proximal segment, the support wire being connected to the proximal segment and extending distally beyond the distal end of the proximal segment, the support wire being shorter and more flexible than the proximal segment; a balloon supported on the probe about the support wire with the support wire extending through the balloon; the tubular proximal segment defining a lumen for communicating the proximal end of the probe with the interior of the balloon to enable inflation and deflation of the balloon; the support wire being connected to the proximal tube by a smaller diameter, relatively short transition tube secured at one end to the distal end of the proximal tube, the proximal end of the support wire being received securely in the lumen at the distal end of the transition tube; aperture means formed in the transition tube for communicating the lumen of the tubular proximal segment and the transition tube with the interior of the balloon; the proximal segment being sufficiently torsionally rigid so that when the probe is in a configuration corresponding to that of a human aortic arch and with the distal segment at least in part in a coronary artery, the probe is capable of transmitting controllably from its proximal to its distal end rotation applied at the proximal end. - View Dependent Claims (6, 7)
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8. A balloon angioplasty tube comprising:
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an elongate, flexible, tubular proximal segment having a proximal end and a distal end; an elongate distal segment including a support wire having a smaller diameter than the outer diameter of the distal end of the proximal segment, the support wire being connected to the proximal segment and extending distally beyond the distal end of the proximal segment, the support wire being shorter and more flexible than the proximal segment; a balloon supported on the probe about the support wire with the support wire extending through the balloon, the distal end of the balloon being attached to the distal segment of the probe; the tubular proximal segment defining a lumen for communicating the proximal end of the probe with the interior of the balloon to enable inflation and deflation of the balloon; a sleeve extending about the support wire, the sleeve being connected at its distal end to the proximal end of the balloon and at its proximal end to the distal end of the proximal segment; said sleeve communicating the interior of the balloon with the lumen of the proximal tubular segment; the probe being adapted to be torqueable from its proximal to its distal end. - View Dependent Claims (9, 10, 11)
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Specification