Vessel prosthesis with a measuring point

• US 20030037591A1
• Filed: 07/01/2002
• Published: 02/27/2003
• Est. Priority Date: 07/04/2001
• Status: Abandoned Application

• Current Assignee: Sulzer Markets and Technology AG
• Original Assignee: Sulzer Markets And Technology Ltd.
• Inventors: Ashton, Tim, Hirt, Felix, Klaeui, Erich, Moser, Urs
• Application Number:
  US10/188,375
• Publication Number:
  US 20030037591A1
• Time in Patent Office: Days
• US Class Current: 73/12.08
• CPC Class Codes: A61B 5/0031 Implanted circuitry
• CPC Class Codes: A61B 5/0215 by means inserted into the body catheters A61M25/00
• CPC Class Codes: A61B 5/145 Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissuemeasuring of blood pressure or blood flow A61B5/02; non-radiation detecting or locating of foreign bodies in blood A61B5/06
• CPC Class Codes: A61B 5/14546 for measuring analytes not otherwise provided for, e.g. ions, cytochromes
• CPC Class Codes: A61B 5/6876 Blood vessel
• CPC Class Codes: A61B 5/6884 Clamps or clips
• CPC Class Codes: A61F 2/06 Blood vessels

Abstract

The combination of a human medical vessel prosthesis (1) comprising a measuring probe (2) with a transponder, which measuring probe can be anchored to the vessel prosthesis, and allows the function of the vessel prosthesis to be monitored over longer periods of time. Suitable measurement parameters such as pressure values can be detected by the measuring probe (2) and be transmitted in a wireless manner with the aid of the transponder to a transceiver apparatus where they are available for evaluation.

Claims

1. A vessel prosthesis (1, 31) comprising a measuring probe (2, 32) with a transponder (40, 40′

, 40″

), wherein the measuring probe can be anchored to the vessel prosthesis and is suitable to detect measurement parameters by means of which the function of the vessel prosthesis (1, 31) can be checked, and wherein the transponder (40, 40′

, 40″

) is formed to interact with a transceiver apparatus (60).

2. A vessel prosthesis in accordance with claim 1, wherein the measuring probe (2, 32) is mechanically connected to the vessel prosthesis (1, 31) and/or is integrated into the vessel prosthesis (1, 31).

3. A vessel prosthesis in accordance with claim 1 or claim 2, wherein the measuring probe (2, 32) is fastened to the outer surface of the vessel prosthesis (1, 31) by means of at least one fastening line (33).

4. A vessel prosthesis in accordance with any one of claims 1 to 3, wherein the measuring probe (2, 32) which can be anchored to the vessel prosthesis (1, 31) comprises a pressure sensor (6, 6′

, 6″

).

5. A vessel prosthesis in accordance with any one of claims 1 to 4, wherein the wall of the vessel prosthesis is flexible;

and wherein the vessel prosthesis and the measuring probe can be implanted via a body vessel.

6. A vessel prosthesis in accordance with any one of claims 1 to 5, wherein the vessel prosthesis (1, 31) is substantially formed in hoselike manner in order to insulate a pathological vaso-dilatation from the inside in the implanted state;

and wherein the measuring probe (2, 32) is provided at the outer surface of the vessel prosthesis (1, 31) such that the tightness of the vessel prosthesis (1, 31) with respect to the dilated vessel can be monitored.

7. A vessel prosthesis in accordance with any one of claims 1 to 6, characterised in that the measuring probe (2, 32) comprises a sleeve (25) and a pressure sensor (6, 6′

, 6″

) which is arranged in the interior of the sleeve (25); and

in that the sleeve (25) is filled with a pressure transmitting medium (26).

8. A vessel prosthesis in accordance with any one of claims 1 to 7, wherein the transponder (40, 40′

, 40″

) is formed as a passive transponder.

9. A vessel prosthesis in accordance with claim 8, wherein the passive transponder (40′

) includes a capacitive pressure sensor (6′

) and an inductor (28); and

wherein the capacitive pressure sensor (6′

) and the inductor (28) are mutually connected such that they form a resonant circuit.

10. A vessel prosthesis in accordance with claim 8, wherein the passive transponder (40″

) comprises an inductive pressure sensor (6″

) and a capacitor (27); and

wherein the inductive pressure sensor (6″

) and the capacitor (27) are mutually connected such that they form a resonant circuit.

11. A vessel prosthesis in accordance with any one of claims 8 to 10, wherein the passive transponder (40, 40′

, 40″

) additionally comprises a non-linear component (29) such that a measured value determined by the measuring probe (2, 32) is transmitted at a frequency which differs from an excitation frequency at which the transponder (40, 40′

, 40″

) is excited.

12. A transceiver apparatus (60) for interaction with a transponder (40) of a measuring probe (2) which is provided at a vessel prosthesis (1, 31) in accordance with any one of claims 1 to 11, said transceiver apparatus (60) including an interrogator antenna 13, characterised in that the interrogator antenna 13 is formed to surround that body part in which the vessel prosthesis (1, 31) is inserted.

13. A transceiver apparatus in accordance with claim 12, wherein the interrogator antenna 13 is arranged in an apparatus which has the form of a belt.

14. A transceiver apparatus in accordance with claim 12 or claim 13, wherein the interrogator antenna includes at least one primary and at least one secondary antenna;

and wherein the two antennas are coupled such that the far-field of the coupled antennas is attenuated.

15. A method for the implantation of a vessel prosthesis (1, 31) having a measuring probe (2, 32) anchorable to the vessel prosthesis (1, 31) in accordance with any one of claims 1 to 11, the method including:

insertion of the folded up vessel prosthesis (1, 31) and of the measuring probe (2, 32) anchored to the same into a catheter (34);

insertion of the catheter (34) into a body vessel;

positioning of the catheter (34) at the point provided for the implantation;

pushing out of the vessel prosthesis (1, 31) and the measuring probe (2, 32) anchored to the same with the aid of a control rod (35), wherein the vessel prosthesis (1, 31) is unfolded to the full length and the measuring probe (2, 32) is brought into its final position.

16. A method in accordance with claim 15, wherein

the measuring probe (2, 32) is fastened to the outer surface of the vessel implant (1, 31) by means of two fastening lines (33) in each case;

the measuring probe (2, 32) is pulled onto the outer surface of the vessel prosthesis (1, 31) by the fastening lines (33) during the unfolding of the vessel prosthesis (1, 31); and

the four fastening lines (33) are stretched in the end state of the unfolding procedure such that the measuring probe (2, 32) is fixed at the outer surface of the vessel prosthesis.