Device for performing measurements on fluids, directly in the sample container

• US 4,339,317 A
• Filed: 11/05/1980
• Issued: 07/13/1982
• Est. Priority Date: 07/05/1978
• Status: Expired due to Term

• Current Assignee: Instituto Sieroterapico E Vaccinogeno Toscano "Sclavo" SPA
• Original Assignee: Instituto Sieroterapico E Vaccinogeno Toscano "Sclavo" SPA
• Inventors: Neri, Paolo, Meiattini, Franco, Tarli, Paolo, Papeschi, Giorgio
• Primary Examiner(s): Tufariello, T.
• Application Number:
  US06/204,220
• Time in Patent Office: 615 Days
• Field of Search: 204/195 R, 204/195 B
• US Class Current: 204/403.02
• CPC Class Codes: A61B 5/14539 for measuring pH
• CPC Class Codes: A61B 5/14542 for measuring blood gases A61B5/14551 takes precedence
• CPC Class Codes: A61B 5/1468 using chemical or electrochemical methods, e.g. by polarographic means A61B5/1486 takes precedence
• CPC Class Codes: A61B 5/15003 for venous or arterial blood
• CPC Class Codes: A61B 5/150221 Valves
• CPC Class Codes: A61B 5/150236 Pistons, i.e. cylindrical bodies that sit inside the syringe barrel, typically with an air tight seal, and slide in the barrel to create a vacuum or to expel blood
• CPC Class Codes: A61B 5/150389 Hollow piercing elements, e.g. canulas, needles, for piercing the skin
• CPC Class Codes: A61B 5/150503 Single-ended needles hollow piercing element tip design A61B5/150396, needle sets for catheters A61M25/06, needles for bringing media into the body A61M5/32
• CPC Class Codes: A61B 5/153 Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
• CPC Class Codes: A61B 5/157 Devices characterised by integrated means for measuring characteristics of blood

Abstract

For taking measurements on fluids, such as biological fluids (e.g. blood and the like), a device is disclosed which is a cylindrical body insertable in a syringe or a similar sampling container and has on the exposed face a set of electrodes or probes which are connected via appropriate electric leads to processing and displaying devices which permit the taking of immediate readings of important parameters such as pH, temperature, partial pressures of gases and so on.

Claims

1. A device for performing analytical measurements on body fluids, such as blood, comprising:

a disposable syringe having opposing ends with a disposable needle at one end for drawing the body fluids within the syringe, and

a reusable cylindrical body slidably insertable into and movable in said syringe from and through said other syringe end, wherein said body is shaped relative to the walls of the syringe between the ends thereof so as to act like a piston therein for withdrawing said body fluids, and wherein said body includes a plurality of sensors at the end thereof adjacent said needle for contacting body fluids drawn within said syringe, and means connected to said sensors and at the other end of said body for connection to instruments for detection and displaying data.

2. A device according to claim 1, wherein the needle end of said syringe includes a neck for connection to a plural-way cock.

3. A device according to claim 1, wherein the plurality of the sensors comprises an electrode for measuring the pH.

4. A device according to claim 1, wherein the plurality of the sensors comprises an electrode for measuring the PCO₂.

5. A device according to claim 1, wherein the plurality of the sensors comprises an electrode for measuring the PO₂.

6. A device according to claim 1, wherein the plurality of the sensors comprises an electrode for measuring the pCa.

7. A device according to claim 1, wherein the plurality of the sensors comprises an electrode for measuring the PCl.

8. A device according to claim 1, wherein the plurality of the sensors comprises an electrode for measuring the pNO₃.

9. A device according to claim 1, wherein the plurality of the sensors comprises a thermosensitive probe.

10. A device according to claim 1, equipped with a thermostatic control system.