Venous pressure isolator

Patent 4314480 Issued on February 9, 1982. Estimated Expiration Date:

July 14, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

17607

2296237

2751935

3482696

3645139

3713341

3863504

Apparatus for sensing pressure
Patent #: 4022190
Issued on: 05/10/1977
Inventor: Meyer

Isolating and blood pressure transmitting apparatus for extracorporeal blood treatment system
Patent #: 4077882
Issued on: 03/07/1978
Inventor: Gangemi

Diaphragm seal for pressure sensing instrument
Patent #: 4109535
Issued on: 08/29/1978
Inventor: Reed , et al.

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Inventor

Becker, Lawrence F.

Assignee

Baxter Travenol Laboratories, Inc.

Application

No. 06/168471 filed on 07/14/1980

US Classes:

73/706, With protective separator600/486, Testing means inserted in body600/488, Pressure transducer structure600/561, Measuring fluid pressure in body73/714, Combined73/715, Diaphragm92/98REntire periphery secured to rigid working chamber forming wall

Examiners

Primary: Woodiel, Donald O.

Attorney, Agent or Firm

International Classes

A61M 1/36 (20060101)
G01L 19/06 (20060101)

Abstract

Apparatus for protecting a pressure-sensitive transducer in an extracorporeal blood system and for providing a sterile barrier while the apparatus transmits the blood pressure to the pressure-sensitive transducer. The apparatus (34) comprises a housing (40, 42) having first (40) and second (42) generally hemispherical members which symmetrically enclose a generally planar silicone membrane diaphragm (44). The membrane diaphragm (44) has a thickness that is less than 0.040 inch and a diameter that is at least twice as great as the intended total deflection distance. The membrane (44) is centered within the housing (40, 42) and greater pressure on either side of the membrane (44) will cause the membrane (44) to deflect to the other side by stretching.