Method of taking internal physiological measurements

• US 20090088609A1
• Filed: 04/28/2006
• Published: 04/02/2009
• Est. Priority Date: 05/03/2005
• Status: Abandoned Application

• Current Assignee: MHM Harzbecher Medizintechnik GmbH
• Original Assignee: MHM Harzbecher Medizintechnik GmbH
• Inventors: Ruhl, Karl Michael, Pfeffer, Joachim Georg, Schnakenberg, Uwe, Schmitz-Rode, Thomas
• Application Number:
  US11/919,774
• Publication Number:
  US 20090088609A1
• Time in Patent Office: Days
• US Class Current: 600/301
• CPC Class Codes: A61B 17/0057 Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect sutures A61B17/04; closing rectum or urethra near body surface A61F2/0009
• CPC Class Codes: A61B 2017/0065 the implement being an adhesive
• 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: A61M 25/0668 splittable, tear apart

Abstract

The invention relates to a device for detecting physiological measured variables within the body, comprising a catheter which has a tip supporting a sensor and which can be introduced into a blood vessel, the catheter (1) being connected to a transponder unit (2) for wireless transmission of at least one measured variable to an external reading station which is arranged outside the blood vessel (4) after insertion of the catheter (1) into said blood vessel (4), the catheter (1) and the transponder (2) being sealed in a leaktight manner. The invention also relates to a sluice/sleeve for coaxial arrangement on an element for insertion into a blood vessel, in particular a needle and/or a catheter, the sluice/sleeve (6,10,11) being able to be divided at least once in the longitudinal direction.

Claims

1. A device for measuring physiological measured variables inside the body, comprising a catheter having a sensor-bearing tip, the catheter being insertable into a blood vessel wherein the catheter is connected to a transponder unit to effect wireless transmission of at least one measured variable to an external reading station that after insertion of the catheter in a blood vessel is provided outside the blood vessel, the catheter and transponder being sealed in a fluid-tight manner.

2. The device according to claim 1 wherein at least some of the components required for insertion, in particular, sheaths and sleeves, are coaxially preassembled on the catheter.

3. The device according to claim 2 wherein the sheaths and/or sleeves have at least one desired tear line, in particular, at least one longitudinal slit at least at their outer end at a distance from the vessel, and by tearing off, in particular, peeling off in the longitudinal direction of the catheter, are removable from the catheter.

4. The device according to claim 1, further comprising

a preassembled cuff provided coaxially about the catheter shaft composed in particular of a hemostatic material, the cuff in particular being provided in a tearable first sleeve.

5. The device according to claim 1, further comprising

a second sleeve preassembled on the catheter shaft, in particular mounted coaxially as the last component on the transponder-adjacent section of the catheter shaft, in particular, that functions as a counter support for a cuff or as an emergency sheath that maintains vessel access.

6. The device according to claim 1 wherein on the catheter tip or on the catheter shaft at least one mark, in particular, radio-opaque points, rings, longitudinal threads or notches is provided that functions for orientation in regard to the length of the catheter implanted in the vessel.

7. The device according to claim 1 wherein a lateral orifice in the catheter adjacent the sensor is connected by a passage running within the catheter to a second transponder-adjacent lateral orifice in the catheter for the purpose of monitoring the catheter position or administering a contrast medium during the implantation procedure.

8. The device according to claim 1 wherein a fixation clip is provided on the catheter shaft that is engageable by a suture and/or a clamp, and by which the system is securable in the adjacent tissue, in particular, wherein the fixation clip is slidable on the catheter shaft.

9. The device according to claim 1 wherein the sensor is mounted laterally on the catheter, the sensor surface having an orientation parallel to the catheter axis.

10. The device according to claim 1 characterized in that wherein at least one catheter section located in the vessel has an antithrombogenic and/or cytostatic coating.

11. In combination with a blood catheter or needle, a sheath/sleeve coaxially fitted over the needle or catheter, the sheath/sleeve being dividable at least once longitudinally.

12. The sheath/sleeve according to claim 11 wherein it has at least one designed tear line running longitudinally, at least along part of its entire length beginning at its outer end.

13. The sheath/sleeve according to one of the foregoing claims 11 wherein it comprises a sleeve-shaped cuff by which an element provided for the insertion into a blood vessel is coaxially enveloped.

14. A blood catheter assembly comprising:

an elongated catheter insertable into a blood vessel and having a pair of ends;

a sensor at one of the ends;

a transponder at the other of the ends including means for wireless transmission; and

a fluid-tight membrane surrounding the entire catheter, sensor, and transponder such that the entire assembly can be fitted to a vein and installed subdermally.

15. The blood catheter assembly defined in claim 14, further comprising:

a sleeve surrounding and extending longitudinally along the catheter between the transponder and the tip, the sleeve being formed with a full-length longitudinal tear line.

16. The blood catheter assembly defined in claim 15, further comprising:

a second sleeve surrounding and extending longitudinally along the catheter outside the first-mentioned sleeve, the second sleeve also being formed with a full-length longitudinal tear line; and

a mass of hemostatic agent between the second sleeve and first sleeve.

17. The blood catheter assembly defined in claim 14 wherein the sleeve is formed with a pair of such longitudinal tear lines.

18. The blood catheter assembly defined in claim 14 wherein the transponder is an RFID device.

19. The blood catheter assembly defined in claim 14, further comprising:

a tube extending along a partial length of the catheter between its ends and having a front end opening outside the catheter immediately adjacent the tip and a rear end opening outside the catheter.

20. The blood catheter assembly defined in claim 14, further comprising:

a radiographically identical mark on the catheter between the ends.