Method for drying a stent

• US 8,304,012 B2
• Filed: 05/04/2006
• Issued: 11/06/2012
• Est. Priority Date: 05/04/2006
• Status: Active Grant

• Current Assignee: Advanced Cardiovascular Systems Incorporated (Abbott Laboratories)
• Original Assignee: Advanced Cardiovascular Systems Incorporated (Abbott Laboratories)
• Inventors: McNiven, Andrew, Huter, Scott, Eppert, Joseph J., Esbeck, Thomas, Van Sciver, Jason, Amick, Joycelyn J.
• Primary Examiner(s): Meeks, Timothy
• Assistant Examiner(s): SELLMAN, CACHET I
• Application Number:
  US11/418,696
• Publication Number:
  US 20070259102A1
• Time in Patent Office: 2,378 Days
• Field of Search: 427/2.1, 427/2.24, 427/2.25, 427/8, 427/372.2, 427/377, 427/384, 118/58, 118/666, 118/667
• US Class Current: 427/2.24
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: B05B 13/0207 the work being an elongated body, e.g. wire or pipe B05B13/0436, B05B13/0463 take precedence
• CPC Class Codes: B05B 13/0221 characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts B05B13/0207 takes precedence; conveyors in general B65G
• CPC Class Codes: B05B 13/0228 the movement of the objects being rotative B05B13/0242 takes precedence
• CPC Class Codes: B05D 1/002 the substrate being rotated
• CPC Class Codes: B05D 1/02 performed by spraying
• CPC Class Codes: B05D 1/32 using means for protecting parts of a surface not to be coated, e.g. using stencils, resists
• CPC Class Codes: B05D 3/0473 for heating, e.g. vapour heating

Abstract

Various embodiments of methods and devices for coating stents are described herein.

Claims

1. A method of drying a stent, comprising:

providing a stent in a chamber, the stent having a coating material including a polymer and a solvent applied to the stent;

directing a fluid stream at the stent to remove at least a portion of the coating material;

measuring a temperature of the fluid stream at a location adjacent to the stent; and

controlling a temperature of the fluid stream based on the measured temperature so as to maintain a desired temperature adjacent to the stent, wherein

the chamber is configured to receive the stent having the coating material including the polymer and the solvent and the chamber is adapted to receive the fluid stream that contacts the coated stent for removing at least a portion of the coating material;

a temperature sensor is adjacent to the stent for measuring a temperature of the fluid stream contacting the stent;

a controller is in communication with the sensor, wherein the controller adjusts a temperature of the fluid stream based on the measured temperature so as to maintain a desired temperature of the fluid stream contacting the stent; and

a second temperature sensor is adjacent to the stent for monitoring the temperature of the stent independent of the controller.

2. The method of claim 1, further comprising measuring a temperature of the fluid stream at a second location adjacent to the stent using the second temperature sensor.

3. The method of claim 1, wherein the removed portion of the coating material comprises the solvent.

4. The method of claim 1, wherein the chamber has an inlet for receiving the fluid stream and an outlet where the fluid stream exits, and wherein during the directing of the fluid stream at the stent, the stent is positioned between the inlet and the outlet on a support structure.

5. The method of claim 4, wherein the providing of the stent in the chamber includes inserting the stent, while on the support structure, through an opening of the chamber between the inlet and the outlet.

6. A method of drying a stent, comprising:

providing a stent in a chamber, the stent having a coating material including a polymer and a solvent applied to the stent;

directing a fluid stream at the stent to remove at least a portion of the coating material;

measuring a temperature of the fluid stream at a location adjacent to the stent; and

controlling a temperature of the fluid stream based on the measured temperature so as to maintain a desired temperature adjacent to the stent, wherein the chamber has an inlet for receiving the fluid stream and an outlet where the fluid stream exits, such that the stent is positioned between the inlet and the outlet on a support structure.

7. The method of claim 6, wherein the providing of the stent in the chamber includes inserting the stent, while on the support structure, in an opening of the chamber between the inlet and the outlet.

8. The method of claim 6, wherein a sensor conducts the measuring of the temperature and the sensor is positioned as close as possible to the stent without disrupting the flow of the fluid stream to the stent and passing the stent.

9. The method of claim 6, wherein removed portion of the coating material comprises the solvent.

10. The method of claim 6, the measuring of the temperature of the fluid stream at the location adjacent to the stent is performed using a first temperature sensor, and the method further comprises measuring the temperature of the fluid stream at a second location adjacent the stent using a second temperature sensor for comparison with the measurement from the first temperature sensor.

11. A method of drying a stent, comprising:

providing a stent in a chamber, the stent having a coating material including a polymer and a solvent applied to the stent;

directing a fluid stream at the stent to remove at least a portion of the coating material;

measuring a temperature of the fluid stream at a location adjacent to the stent; and

controlling a temperature of the fluid stream based on the measured temperature so as to maintain a desired temperature adjacent to the stent, wherein a first temperature sensor is in the chamber for measuring a drying temperature of the stent and communicating the measurement to a controller for controlling the drying of the stent, and a second temperature sensor is in the chamber for measuring a drying temperature of the stent and displaying the temperature on a monitor.

12. The method of claim 11, wherein removed portion of the coating material comprises the solvent.

13. The method of claim 11, wherein the chamber has an inlet for receiving the fluid stream and an outlet where the fluid stream exits, and wherein during the directing of the fluid stream at the stent, the stent is positioned between the inlet and the outlet on a support structure.

14. The method of claim 13, wherein the providing of the stent in the chamber includes inserting the stent, while on the support structure, through an opening of the chamber between the inlet and the outlet.

15. A method of drying a stent, comprising:

providing a stent in a chamber, the stent having a coating material including a polymer and a solvent applied to the stent;

directing a fluid stream at the stent to remove at least a portion of the coating material;

measuring a temperature of the fluid stream at a location adjacent to the stent;

controlling a temperature of the fluid stream based on the measured temperature so as to maintain a desired temperature adjacent to the stent, the controlling of the temperature of the fluid stream comprises taking at least one temperature reading from a sensor, providing the reading to a control system such that the control system compares the reading to a selected temperature parameter, and if needed changes the temperature of the fluid stream based on the comparison made; and

using a second sensor to take at least one temperature reading and displaying it on a monitor for verifying the accuracy of temperature changes made by the control system.

16. The method of claim 15, wherein removed portion of the coating material comprises the solvent.

17. The method of claim 15, wherein the chamber has an inlet for receiving the fluid stream and an outlet where the fluid stream exits, and wherein during the directing of the fluid stream at the stent, the stent is positioned between the inlet and the outlet on a support structure.

18. The method of claim 17, wherein the providing of the stent in the chamber includes inserting the stent, while on the support structure, through an opening of the chamber between the inlet and the outlet.