Vascular blood pressure monitoring system with transdermal catheter and telemetry capability

• US 20050197585A1
• Filed: 03/04/2005
• Published: 09/08/2005
• Est. Priority Date: 03/06/2004
• Status: Abandoned Application

• Current Assignee: Transoma Medical, Inc.
• Original Assignee: Transoma Medical, Inc.
• Inventors: Brockway, Brian P., Mills, Perry A.
• Application Number:
  US11/073,413
• Publication Number:
  US 20050197585A1
• 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 5/411 Detecting or monitoring allergy or intolerance reactions to an allergenic agent or substance

Abstract

Systems and methods for monitoring intravascular pressure of a patient. The system includes a pressure sensor and catheter assembly having a pressure sensor portion and a transdermal catheter portion. The transdermal catheter portion has a fluid filled lumen and a distal barrier to maintain patency. A transmitter unit may be connected to the pressure sensor portion via a lead. The transmitter unit transmits pressure data to a remote receiver unit that may communicate (directly or indirectly) with a cable management device, a data acquisition device, a monitoring instrument, a computer, a modem, a telecommunication line, a network, etc. In addition, the system may include means to correct for pressure variations due to any difference in elevation between the sensor assembly and the heart.

Claims

1. A system for monitoring intravascular pressure of a patient, comprising:

a pressure sensor and catheter assembly including a pressure sensor portion and a transdermal catheter portion, the transdermal catheter portion having a fluid filled lumen and a distal barrier;

a lead connected to the pressure sensor portion;

a transmitter unit releasably connected to the lead, the transmitter unit transmitting pressure data received from the pressure sensor via the lead;

a connector for releasable connection to the patient'"'"'s body or clothing; and

a receiver unit for receiving pressure data from the transmitter unit.

2. A system as in claim 1, wherein the pressure sensor portion includes a pressure transducer, and wherein the pressure transducer has a minimum sensitivity of 5 uV/V/mmHg.

3. A system as in claim 1, wherein the transdermal catheter is configured to inserted through the patient'"'"'s skin and into a blood vessel.

4. A system as in claim 3, wherein the blood vessel comprises a blood vessel in the patient'"'"'s arm.

5. A system as in claim 4, wherein the blood vessel in the patient'"'"'s arm comprises a radial artery.

6. A system as in claim 3, wherein the transdermal catheter has second lumen for drawing blood and/or infusing fluid.

7. A method for monitoring intravascular pressure of a patient, comprising:

providing a pressure sensor and catheter assembly including a pressure sensor portion and a transdermal catheter portion, the transdermal catheter portion having proximal end, a distal end, and a fluid filled lumen with a distal barrier;

inserting the transdermal catheter portion through the patient'"'"'s skin and into a vascular lumen such that the distal end resides in the vascular lumen and the proximal end resides outside the skin;

providing a lead connected to the pressure sensor portion;

providing a transmitter unit having a means for connection to the patient'"'"'s body or clothing;

releasably connecting the lead to the transmitter unit to receive pressure data from the pressure sensor portion;

connecting the transmitter unit to the patient'"'"'s body or clothing;

providing a remote receiver unit; and

transmitting pressure data from the transmitter unit to the remote receiver unit.

8. A method as in claim 7, wherein the pressure sensor portion includes a pressure transducer, and wherein the pressure transducer has a minimum sensitivity of 5 uV/V/mmHg.

9. A method as in claim 7, wherein the blood vessel comprises a blood vessel in the patient'"'"'s arm.

10. A method as in claim 9, wherein the blood vessel in the patient'"'"'s arm comprises a radial artery.

11. A method as in claim 7, wherein the transdermal catheter has second lumen.

12. A method as in claim 11, further comprising the step of drawing blood through the second lumen.

13. A method as in claim 11, further comprising the step of infusing fluid through the second lumen.

14. A method for monitoring intravascular pressure of a human patient, comprising:

providing a pressure sensor and catheter assembly including a pressure sensor portion and a transdermal catheter portion, the transdermal catheter portion having a proximal end, a distal end, and a fluid filled pressure sensing lumen with a distal barrier, the pressure sensor portion connected to the proximal end of the catheter portion;

inserting the transdermal catheter portion through the patient'"'"' skin and into a blood vessel such that the distal end of the catheter portion resides in a lumen of the blood vessel and the proximal end of the catheter portion resides outside the skin; and

linking the pressure sensor portion to a monitoring instrument.

15. A method as in claim 14, further comprising:

providing a transmitter connected to and receiving a pressure signal from the pressure sensor portion; and

wirelessly transmitting pressure data representative of the pressure signal using the transmitter.

16. A method as in claim 14, wherein the step of linking the pressure sensor portion to the monitoring instrument comprises a hardwired link.

17. A method as in claim 16, wherein the pressure sensor portion includes a pressure transducer, and wherein the pressure transducer has a minimum sensitivity of 5 uV/V/mmHg.

18. A method as in claim 17, wherein the pressure transducer has a pressure range of −

30 to 300 mmHg.

19. A method as in claim 18, wherein the pressure transducer has an excitation impedance greater than 200 Ohms.

20. A method as in claim 19, wherein the pressure transducer has an unbalance of less than ±

75 mmHg.

21. A method as in claim 20, wherein the pressure transducer has an accuracy of 1 mmHg+1% of reading for −

20 to 50 mmHg and ±

3% of reading for 50 to 300 mmHg.

22. A method as in claim 17, wherein the blood vessel comprises a blood vessel in the patient'"'"'s arm.

23. A method as in claim 22, wherein the blood vessel in the patient'"'"'s arm comprises a radial artery.

24. A method as in claim 17, wherein the transdermal catheter has second lumen.

25. A method as in claim 24, further comprising the step of drawing blood through the second lumen.

26. A method as in claim 24, further comprising the step of infusing fluid through the second lumen.