Spring assisted medical device deployment assembly
First Claim
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1. A medical device deployment assembly, comprising:
- a handle having a proximal end;
a retractable sheath with a distal tip, and a proximal end attached to move with the handle;
a catheter positioned inside the retractable sheath and having a proximal end;
a medical device compressed between an outer surface of the catheter and an inner surface of the retractable sheath, and having a proximal tip;
a spring positioned inside the retractable sheath;
a pusher band attached to move with the catheter relative to the sheath, disposed at a fixed position on the catheter, and positioned inside the retractable sheath between the medical device and the spring;
wherein the spring biases the medical device deployment assembly toward a deployment configuration in which the distal tip of the retractable sheath is proximal to the proximal tip of the medical device; and
wherein the proximal end of the handle is closer to the proximal end of the catheter than to the spring.
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Abstract
A medical device deployment assembly includes a retractable sheath and a catheter positioned inside the retractable sheath. A medical device is compressed between an outer surface of the catheter and an inner surface of the retractable sheath. A spring is positioned inside the retractable sheath, and a pusher band is positioned inside the retractable sheath between the medical device and the spring. The spring biases the medical device deployment assembly toward a deployment configuration in which a distal tip of the retractable sheath is proximal to a proximal tip of the medical device.
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Citations
20 Claims
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1. A medical device deployment assembly, comprising:
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a handle having a proximal end; a retractable sheath with a distal tip, and a proximal end attached to move with the handle; a catheter positioned inside the retractable sheath and having a proximal end; a medical device compressed between an outer surface of the catheter and an inner surface of the retractable sheath, and having a proximal tip; a spring positioned inside the retractable sheath; a pusher band attached to move with the catheter relative to the sheath, disposed at a fixed position on the catheter, and positioned inside the retractable sheath between the medical device and the spring; wherein the spring biases the medical device deployment assembly toward a deployment configuration in which the distal tip of the retractable sheath is proximal to the proximal tip of the medical device; and wherein the proximal end of the handle is closer to the proximal end of the catheter than to the spring. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of operating a medical device deployment assembly that includes a catheter positioned inside a retractable sheath, and the retractable sheath is attached to move with a handle;
- the catheter includes a proximal end, and the handle includes a proximal end;
a medical device compressed between an outer surface of the catheter and an inner surface of the retractable sheath;
a spring positioned inside the retractable sheath; and
a pusher band attached to move with the catheter relative to the sheath, disposed at a fixed position on the catheter, and positioned inside the retractable sheath between the medical device and the spring, the method comprising the steps of;positioning the medical device of the medical device deployment assembly at a deployment location; and deploying the medical device at the deployment location; wherein the deploying step includes moving the handle, which has the proximal end that is closer to the proximal end of the catheter than to the spring, to slide the retractable sheath with respect to the catheter while maintaining the catheter stationary with respect to the deployment location; wherein the sliding step includes pushing the retractable sheath with respect to the catheter with a pushing force using the spring. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
- the catheter includes a proximal end, and the handle includes a proximal end;
Specification