Disposable manometer

• US 3,890,842 A
• Filed: 04/23/1974
• Issued: 06/24/1975
• Est. Priority Date: 04/23/1974
• Status: Expired due to Term

• Current Assignee: Critikon, Inc. (Johnson & Johnson)
• Original Assignee: Maynard Ramsey III
• Inventors: Ramsey, Maynard III
• Primary Examiner(s): Woodiel, Donald O.
• Application Number:
  US05/463,393
• Time in Patent Office: 427 Days
• Field of Search: 73/409,420,410 128/2.5D,2.5E 92/91,92 138/30 141/312,383
• US Class Current: 73/731
• CPC Class Codes: A61B 5/0215 by means inserted into the body catheters A61M25/00
• CPC Class Codes: A61B 5/031 Intracranial pressure
• CPC Class Codes: G01L 19/003 using a detachable interface or adapter between the process medium and the pressure gauge
• CPC Class Codes: G01L 19/0645 using isolation membranes, specially adapted for protection

Abstract

A disposable pressure monitoring device comprising a tube which is separated by a flexible finger shaped diaphragm into first and second chambers. One end of the tube is provided with a fluid filling assembly which keeps the diaphragm in a recessed position, with the other end of the tube being attached to a pressure sensing device. The pressure sensing device is of any standard reusable type and it does not require sterilization.

Claims

1. A disposable blood pressure monitor comprising an elongated tubular structure, means on one end of said tubular structure adapted to place the interior of said tubular structure in direct communication with a fluid system to be monitored, a flexible membrane received within said tubular structure, said flexible membrane separating said tubular structure into first and second chambers, stopper means engaging the other end of said tubular structure and filling means removably mounted on said means of said tubular structure adapted to place the interior of said tubular structure in direct communication with a fluid system to be monitored, said filling means comprising a hollow receptacle member, tube means secured to said hollow receptacle member and communicating with said hollow receptacle member, said tube means extending into said tubular structure and engaging said flexible membrane to depress said flexible sac-like membrane within said tubular structure.

2. A disposable blood pressure monitor as claimed in claim 1 wherein said filling means comprises a receptacle member defining a tapered bore, a tube member defining a bore secured to said receptacle member and communicating with said receptacle member tapered bore.

3. A disposable blood pressure monitor as claimed in claim 2 wherein said tube member has a blunt end and defines a plurality of holes in its wall to allow said tube member bore to communicate outside of said tube wall.

4. A disposable blood pressure monitor as claimed in claim 2 wherein said tubular member has a blunt beveled end exposing an inclined section of said bore.

5. A disposable blood pressure monitor as claimed in claim 2 wherein said receptacle member defines a plurality of external ribs, each of said ribs defining channels therebetween.

6. A disposable blood pressure monitor as claimed in claim 1 wherein said receptacle member defines a flange on one end, said flange extending substantially transversely from said receptacle member.

7. A disposable blood pressure monitor as claimed in claim 1 wherein said tube means is a hollow needle.

8. A disposable blood pressure monitor using a gauge comprising an elongated tubular structure, connector means formed on one end of said tubular structure adapted to place the interior of said tubular structure in communication with a fluid system to be monitored, a flexible sac-like membrane positioned within said tubular structure to separate said tubular structure into first and second chambers and stopper means sealing the other end of said tubular structure, said stopper means being adapted to receive said gauge, a filling and retaining means removably mounted to said connector means, said filling and retaining means comprising a connector sleeve member removably mounted to said connector means, a receptacle member defining a bore mounted to said connector sleeve, tube means secured to said receptacle member and extending through said connector means into the interior of said tubular structure to engage and indent said flexible sac-like membrane, said tube means communicating with said receptacle member and defining discharge means to allow liquid to be discharged in one of said chambers, said sleeve connector member defining at least one discharge port allowing fluid contained in said one of said chambers to pass therethrough when liquid is discharged into said one of said chambers.

9. A disposable blood pressure monitor comprising an elongated tubular structure having a conical end with a tubular pRojection adapted to place the interior of said tubular structure in communication with a fluid system to be monitored and an open other end, a flexible membrane mounted within said tubular structure to separate said tubular structure into first and second chambers, a stopper member mounted in said other end of said tubular member, gauge means mounted in said stopper member and filling and retaining means mounted to said tubular projection, said filling and retaining means comprising a connector sleeve mounted on said tubular projection, said connector sleeve defining at least one discharge port, a hollow receptacle member defining a tapered bore connected to said connector sleeve, a hollow needle member secured to said hollow receptacle member, the bore of said hollow needle member communicating with the tapered bore of said receptable member, and the interior of said tubular structure, said needle member having an outside diameter less than the inside diameter of said tubular projection to form an annular space between the two diameters, said needle member being of suitable length to extend into the interior of said tubular structure to engage and indent said flexible membrane, and defining a blunt end and fluid discharge means.

10. A disposable blood pressure monitor comprising an elongated tubular structure, connector means formed on one end of said tubular structure adapted to place the interior of said tubular structure in communication with a fluid system to be monitored, a flexible member connected to and received within said tubular structure, said flexible member separating said tubular structure into first and second chambers, stopper means positioned in the other end of said tubular structure, said stopper means being adapted to receive gauge means, filling means removably mounted to said connector means, said filling means comprising a receiving member defining a throughgoing bore and hollow tubular means secured to said receiving member and communicating with said receiving member throughgoing bore, said tubular means extending into said tubular structure and adapted to transport liquid into said tubular structure and discharge means associated with said connector means to allow fluid to be discharged from said tubular structure when liquid is transported into said tubular structure.