Measurement apparatus for analyzing fluids

• US 5,837,199 A
• Filed: 05/13/1996
• Issued: 11/17/1998
• Est. Priority Date: 08/05/1994
• Status: Expired due to Fees

• Current Assignee: Institut Fur Chemo- Und Biosensorik Munster e.V.
• Original Assignee: Institut Fur Chemo- Und Biosensorik Munster e.V.
• Inventors: Dumschat, Christa
• Primary Examiner(s): Soderquist, Arlen
• Application Number:
  US08/615,192
• Time in Patent Office: 918 Days
• Field of Search: 128/635, 204/403, 204/416, 422/61, 422/68.1, 422/82.01, 422/82.02, 422/82.03, 422/82.04, 422/82.05, 436/66, 436/68, 436/74, 436/79, 436/80-84, 436/93-99, 436/108, 436/110, 436/113, 436/150, 436/163
• US Class Current: 422/68.1
• CPC Class Codes: G01N 2035/1062 for testing the liquid while it is in the transfer device
• CPC Class Codes: G01N 27/283 Means for supporting or introducing electrochemical probes
• CPC Class Codes: Y10T 436/142222 Hetero-O [e.g., ascorbic acid, etc.]
• CPC Class Codes: Y10T 436/145555 Hetero-N
• CPC Class Codes: Y10T 436/171538 Urea or blood urea nitrogen
• CPC Class Codes: Y10T 436/173076 Nitrite or nitrate
• CPC Class Codes: Y10T 436/175383 Ammonia

Abstract

The invention relates to a measurement apparatus (1) for analysing fluids, comprising a container (3) in the form of a syringe, into which a fluid may be taken in via an intake device (14) through at least one opening (5), and further comprising a sensor (7) which is either integrated in the container wall (9) or is attached to said container wall (9), the sensor(s) (7) being so disposed that it/they can come into contact with the fluid which may be taken up into the cavity (10).

Claims

1. A measurement apparatus for analyzing a medium, comprising:

a container including an opening, a cavity in fluid communication with the opening, and at least one sensor being one of integrated in and mounted on a wall of the container;

at least one plunger movably disposed in the cavity;

the at least one plunger including at least one reservior;

a calibrating solution disposed in the at least one reservoir;

the at least one plunger for drawing the medium into the cavity through the opening; and

the a least one reservoir and the at least one sensor arranged such that the calibrating solution and the medium in the cavity separately contact the at least one sensor.

2. The measurement apparatus according to claim 1, further comprising a seal member movably disposed in the cavity.

3. The measurement apparatus according to claim 1, the at least one plunger comprising two plungers movably disposed in the cavity.

4. The measurement apparatus according to claim 1, further comprising one of a cannula and a cannula closure in fluid communication with the opening.

5. The measurement apparatus according to claim 4, further comprising a seal member movably disposed in the cavity.

6. The measurement apparatus according to claim 5, the one of the cannula and the cannula closure being guidable through the seal member.

7. The measurement apparatus according to claim 4, the one of the cannula and the cannula closure being guidable from an exterior through the container wall into the cavity.

8. The measurement apparatus according to claim 4, the one of the cannula and the cannula closure being closable after removal of the one of the cannula and the cannula closure.

9. The measurement apparatus according to claim 1, further comprising:

an aperture in the container wall; and

the at least one sensor being disposed in the apperture.

10. The measurement apparatus according to claim 1, the at least one sensor comprising a disposable sensor.

11. The measurement apparatus according to claim 1, the at least one sensor being selected from the group consisting of ion-selective electrodes, biosensors, aperometric sensors, optical sensors, and gas sensors.

12. The measurement apparatus according to claim 1, the least one sensor comprising and ion-selective electrode for detecting ions selected from the group consisting of NH₄, Ca²⁺, H⁺, Li⁺, K⁺, Na⁺, and NO₃^-.

13. The measurement apparatus according to claim 1, at least one sensor comprising a biosensor for detecting analytes selected from the group consisting of urea, glucose, and pesticides.

14. The measurement apparatus according to claim 1, the at least one sensor comprising an amperometric sensor for detecting analytes selected from the group consisting of oxygen and heavy metals.

15. The measurement apparatus according to claim 1, the at least one sensor comprising a sensor for detecting analytes selected from the group consisting of blood electrolytes, glucose, urea, and oxygen.

16. The measurement apparatus according to claim 1, the at least one sensor comprising a sensor for detecting analytes selected from the group consisting of nitrates, heavy metals, oxygen, and pesticides.

17. The measurement apparatus according to claim 1, the at least one sensor comprising a sensor for detecting analytes selected from the group consisting of CO, CO₂, and NH₃.

18. The measurement apparatus according to claim 1, the container comprising a syringe.

19. A measurement apparatus according to claim 1, further comprising a medium to be analyzed being located in the cavity.

20. The measurement apparatus according to claim 19, the medium comprising at least one of a liquid and a gas.

21. The measurement apparatus according to claim 19, the medium comprising blood.

22. The measurement apparatus according to claim 19, the medium comprising water.

23. The measurement apparatus according to claim 19, the medium comprising air.

24. The measurement apparatus according to claim 19, the medium to be analyzed comprising at least one analyte selected from the group consisting of blood electrolytes, glucose, urea, and oxygen.

25. The measurement apparatus according to claim 19, the medium to be analyzed comprising at least one analyte selected from the group consisting of nitrates, heavy metals, oxygen, and pesticides.

26. The measurement apparatus according to claim 19, the medium to be analyzed comprising at least one analyte selected from the group consisting of CO, CO₂, and NH₃.

27. The measurement apparatus according to claim 19, further comprising a seal member movably disposed in the cavity.

28. A measurement apparatus for analyzing a medium, comprising:

a container including an opening, a cavity in fluid communication with the opening, and at least one sensor being associated with a wall of the container;

at least one plunger movably disposed in the cavity;

the at least one plunger including at least one reservoir; and

a calibrating solution disposed in the at least one reservoir.