MEDICAL DEVICES

• US 20100217136A1
• Filed: 02/23/2010
• Published: 08/26/2010
• Est. Priority Date: 11/04/2003
• Status: Abandoned Application

• Current Assignee: L & P 100 Limited
• Original Assignee: L & P 100 Limited
• Inventors: Davies, Julia P., Davies, G. Alban, O'Riordan, Simon John Patrick, Turner, Nicholas McMahon, Payne, Peter Alfred
• Application Number:
  US12/711,161
• Publication Number:
  US 20100217136A1
• Time in Patent Office: Days
• US Class Current: 600/488
• CPC Class Codes: A61B 2560/0219 of externally powered implanted units
• 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 5/076 Permanent implantations telemetry using implanted circuitry A61B5/0031; implanted stimulators for therapy A61N1/3605, A61N1/362, A61N1/372
• CPC Class Codes: A61B 5/1473 invasive, e.g. introduced into the body by a catheter A61B5/1482 takes precedence
• CPC Class Codes: A61B 5/6862 Stents
• CPC Class Codes: A61B 5/6876 Blood vessel
• CPC Class Codes: A61B 7/005 Detecting noise caused by implants, e.g. cardiac valves
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/24 Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
• CPC Class Codes: A61F 2/86 Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/065 Y-shaped blood vessels
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2250/0002 for data transfer

Abstract

There is disclosed a medical device for implantation in a body comprising: one or more sensors for sensing a physiologically or clinically relevant parameter; and telemetric communications means for telemetrically transmitting data related to a parameter sensed by the one or more sensors to a remote device.

Claims

1-37. -37. (canceled)

38. A system for monitoring a patient comprising:

a medical device adapted to be implanted in a body comprising at least two spaced apart implantable pressure sensors for sensing blood pressure and an implantable RFID device coupled to the implantable pressure sensors for receiving data related to the blood pressures sensed by the implantable pressure sensors in which the medical device is implanted in an extravascular configuration wherein the sensors are out of direct contact with the blood; and

a remote device adapted for positioning exterior of the body for sending a signal to the RFID device to cause the RFID device to telemetrically transmit the data.

39. A system according to claim 38 in which the remote device is adapted to provide power remotely to the RFID device.

40. A system according to claim 38 in which the remote device comprises memory for storing data transmitted by the RFID device.

41. A system according to any of claim 38 in which the remote device comprises data analysis means for performing a physiologically relevant analysis of the data transmitted by the RFID device.

42. A system according to any of claim 38 in which the remote device comprises data transmission means.

43. A system according to any of claim 38 further comprising a data storage device which is separate to the remote device, in which the remote device comprises means to write data on the data storage device.

44. A system according to claim 43 in which the data storage device is a card having a magnetic data storage area, a DVD, a CD or another disc storage medium.

45. A medical device for implantation in a body comprising:

an implantable piezoelectric sensor comprising a polymeric active sensing area which senses blood pressure, the polymeric active sensing area being flexible, the implantable piezoelectric sensor adapted to be implanted in an extravascular configuration wherein the sensors are out of direct contact with the blood; and

an implantable RFID device electrically connected to the sensor for receiving and telemetrically transmitting data related to the blood pressure sensed by the sensor to a remote device exterior of the body in response to the remote device transmitting a signal to the RFID device.

47. A medical device according to claim 45 in which the implantable piezoelectric sensor has a thickness ranging from between 60 to 110 microns.

48. A medical device according to claim 45 in which the polymeric active sensing area comprises PVDF.

46. A system for monitoring a patient comprising:

a medical device adapted for implantation in a body comprising at least two spaced apart implantable pressure sensors for sensing blood pressure and an implantable RFID device coupled to the implantable pressure sensors for receiving data related to the blood pressures sensed by the implantable pressure sensors in which the medical device is adapted to be implanted in an extravascular configuration wherein the sensors are out of direct contact with the blood;

means for calculating an instantaneous blood velocity from a difference in the blood pressures sensed by the blood pressure sensors using Bernoulli'"'"'s equations; and

a remote device adapted for positioning exterior of the body for sending a signal to the RFID device to cause the RFID device to telemetrically transmit the data.

49. A method for monitoring blood pressure of a patient comprising:

providing an implantable medical device comprising at least two spaced apart implantable pressure sensors for sensing blood pressure within a body, and an implantable telemetric communication means comprising an RFID device coupled to the implantable pressure sensors for telemetrically transmitting data relating to the blood pressures sensed by the pressure sensors to a remote device;

implanting the medical device in the patient'"'"'s body in an extravascular configuration wherein the sensors are out of direct contact with the blood;

sensing blood pressure within the body using the implanted pressure sensors; and

telemetrically transmitting data related to the blood pressure sensed by the implantable pressures sensors to a remote device.

50. A method according to claim 49 in which the remote device is adapted to provide power remotely to the RFID device.

51. A method according to claim 49 in which the remote device comprises memory for storing the data transmitted by the RFID device.

52. A method according to any of claim 49 in which the remote device comprises data analysis means for performing a physiologically relevant analysis of the data transmitted by the RFID device.

53. A method according to any of claim 49 in which the remote device comprises data transmission means.

54. A method according to any of claim 49 further comprising a data storage device which is separate to the remote device, in which the remote device comprises means to write data on the data storage device.

55. A method according to claim 54 in which the data storage device is a card having a magnetic data storage area, a DVD, a CD or another disc storage medium.