Pressure wire assembly

• US 20090082678A1
• Filed: 09/25/2007
• Published: 03/26/2009
• Est. Priority Date: 09/25/2007
• Status: Active Grant

• Current Assignee: St. Jude Medical Coordination Center BVBA (Abbott Laboratories)
• Original Assignee: Radi Medical Systems AB (Abbott Laboratories)
• Inventors: Smith, Leif
• Granted Patent: US 8,216,151 B2
• Time in Patent Office: Days
• US Class Current: 600/486
• CPC Class Codes: A61B 5/0215 by means inserted into the body catheters A61M25/00
• CPC Class Codes: A61B 5/6851 Guide wires

Abstract

Pressure sensor wire assembly for measuring pressure inside a body of a patient, the assembly comprises a pressure sensor element for measuring pressure and to generate a pressure sensor signal in response of said pressure, and a pressure sensor wire having said pressure sensor element at its distal portion, and adapted to be inserted into the body in order to position the sensor element within the body. In addition is arranged a sensor signal adapting circuitry, being an integrated part of said assembly, wherein the pressure sensor signal is applied to the adapting circuitry that is adapted to automatically generate an output pressure signal, related to the sensor signal, in a standardized format such that the measured pressure is retrievable by an external physiology monitor. The assembly further comprises an external pressure sensor arranged at the assembly to measure the pressure outside the patient'"'"'s body and to generate external pressure values in dependence thereto, the external pressure values are applied to a pressure compensation means, in the assembly, adapted to generate a compensation value reflecting the external pressure variation during a measurement procedure, wherein the output pressure signal is compensated by said compensation value prior to the output pressure signal being applied to the external physiology monitor.

Claims

1. Pressure sensor wire assembly for measuring pressure inside a body of a patient, the assembly comprises:

a pressure sensor element for measuring pressure and to generate a pressure sensor signal in response of said pressure;

a pressure sensor wire having said pressure sensor element at its distal portion, and adapted to be inserted into the body in order to position the sensor element within the body,

a sensor signal adapting circuitry, being an integrated part of said assembly, wherein the pressure sensor signal is applied to the adapting circuitry that is adapted to automatically generate an output pressure signal, related to the sensor signal, in a standardized format such that the measured pressure is retrievable by an external physiology monitor, characterized in that

the assembly further comprises an external pressure sensor arranged in the assembly to measure the pressure outside the patient'"'"'s body and to generate external pressure values in dependence thereto, the external pressure values are applied to a pressure compensation means, in said assembly, adapted to generate a compensation value reflecting the external pressure variation during a measurement procedure, wherein the output pressure signal is compensated by said compensation value prior to the output pressure signal being applied to the external physiology monitor.

2. Pressure sensor wire assembly according to claim 1, wherein an initial external pressure value is determined as the external pressure value measured when a measurement procedure is initiated, and the compensation means is adapted to generate said compensation value in relation to the difference between the present and initial external pressure values.

3. Pressure sensor wire assembly according to claim 1, wherein said assembly further comprises a wire connector to which a proximal portion of the pressure sensor wire is adapted to be connected, and a connecting cable connecting the wire connector to the external physiology monitor, and said wire connector includes said adapting circuitry.

4. Pressure sensor wire assembly according to claim 3, wherein said external pressure sensor is arranged in said wire connector.

5. Pressure sensor wire assembly according to claim 3, wherein said external pressure sensor is arranged along said connecting cable.

6. Pressure sensor wire assembly according to claim 1, wherein the assembly further comprises a transceiver unit and a communication unit, the pressure sensor wire is adapted to be connected, at its proximal end, to said transceiver unit that is adapted to wirelessly communicate via a communication signal with said communication unit, the communication unit is connected to the external physiology monitor, in order to transfer output pressure signal to the external physiology monitor.

7. Pressure sensor wire assembly according to claim 6, wherein the external pressure sensor is arranged in said transceiver unit.

8. Pressure sensor wire assembly according to claim 6, wherein the external pressure sensor is arranged in said communication unit.

9. Pressure sensor wire assembly according to claim 6, wherein the wireless communication is performed by using an established communication protocol, e.g. Bluetooth.

10. Pressure sensor wire assembly according to claim 1, wherein said pressure compensation means comprises a control means and a storage means, and that the generated external pressure values are stored in said storage means.