Stent locating device

• US 5,665,103 A
• Filed: 03/07/1996
• Issued: 09/09/1997
• Est. Priority Date: 03/07/1996
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Hastings, Roger N., Lafontaine, Daniel M.
• Primary Examiner(s): Tucker, Guy V.
• Assistant Examiner(s): TRUONG, KEVIN THAO
• Application Number:
  US08/612,158
• Time in Patent Office: 551 Days
• Field of Search: 606/192, 606/194, 606/198, 606/195, 606/108, 623/1, 623/43
• US Class Current: 606/192
• CPC Class Codes: A61B 2017/00026 Conductivity or impedance, e.g. of tissue
• CPC Class Codes: A61B 2017/0003 of parts of the instruments
• CPC Class Codes: A61B 5/05 Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves impedance plethysmography A61B5/0295; measuring movement of the entire body or parts thereof A61B5/11; detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof A61B5/24
• CPC Class Codes: A61B 5/06 Devices, other than using radiation, for detecting or locating foreign bodies for removing same A61B17/50 ; determining position of probes within or on the body of the patient
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts

Abstract

A method of detecting a metallic stent inside a living body wherein the method includes the steps of: (1) providing a stent locator device, (2) providing a metallic stent, (3) inserting the metallic stent into the living body, (4) inserting the stent locator into the living body and (5) locating the stent with the stent locator by detecting an electrical parameter affected by the position of the stent relative to the position of the locating device. The electrical parameter may be detected with a pair of electrodes or a coil mounted to the distal end of the stent locator. The stent locator may include one or more radiopaque markers mounted on the distal end such that the position of the stent may be radiographically correlated to the position of the stent locator device. Alternatively, the stent locator may include one or more visual markers mounted on the proximal end such that the position of the stent may be visually correlated to the position of the stent locator device. The stent locator may be in the form of virtually any intraluminal device such as a guide wire, a balloon catheter, an atherectomy catheter or a stent delivery catheter. In addition, the stent may be inserted prior to, subsequent to or simultaneously with the stent locator device.

Claims

1. A method of detecting a metallic stent inside a living body, comprising the steps of:

(i) providing a stent locator device having a proximal end, a distal end and a pair of electrodes mounted on the distal end;

(ii) providing a metallic stent;

(iii) inserting the metallic stent inside the living body;

(iv) inserting the stent locator inside the living body; and

(v) locating the stent with the stent locator by detecting an electrical parameter when the electrodes on the stent locator are positioned adjacent the stent.

2. A method of detecting a metallic stent inside a living body as in claim 1, wherein the stent locator includes a signal detector electrically connected to the electrodes.

3. A method of detecting a metallic stent inside a living body as in claim 2, wherein the detected electrical parameter is conduction.

4. A method of detecting a metallic stent inside a living body as in claim 3, wherein the stent locator device includes at least one radiopaque marker mounted on the distal end.

5. A method of detecting a metallic stent inside a living body as in claim 4, further comprising the step of:

(vi) radiographically locating the radiopaque marker on the stent locator to determine the position of the stent.

6. A method of detecting a metallic stent inside a living body as in claim 3, wherein the stent locator device includes at least one visual marker mounted on the proximal end.

7. A method of detecting a metallic stent inside a living body as in claim 6, further comprising the step of:

(vi) visually locating the visual marker on the stent locator to determine the position of the stent.

8. A method of detecting a metallic stent inside a living body as in claim 3, wherein the stent locator is a guide wire.

9. A method of detecting a metallic stent inside a living body as in claim 3, wherein the stent locator is a balloon catheter.

10. A method of detecting a metallic stent inside a living body as in claim 3, wherein the stent locator is an atherectomy catheter.

11. A method of detecting a metallic stent inside a living body as in claim 3, wherein the stent locator is a stent delivery catheter.

12. A method of detecting a metallic stent inside a living body as in claim 3, wherein the stent is inserted prior to the stent locator.

13. A method of detecting a metallic stent inside a living body as in claim 3, wherein the stent locator is inserted prior to the stent.

14. A method of detecting a metallic stent inside a living body as in claim 3, wherein the stent and the stent locator are inserted simultaneously.