Syringe pump having continuous pressure monitoring and display

• US 5,295,967 A
• Filed: 09/23/1992
• Issued: 03/22/1994
• Est. Priority Date: 09/23/1992
• Status: Expired due to Term

• Current Assignee: Fresenius AG (Fresenius SE & Co. KGaA)
• Original Assignee: Becton, Dickinson & Co
• Inventors: Rondelet, Jean-Claude, Dupouy, Jean-Michael
• Primary Examiner(s): Hirsch, Paul J.
• Application Number:
  US07/949,610
• Time in Patent Office: 545 Days
• Field of Search: 604/154, 604/155, 604/67, 604/65, 128/DIG. 12, 128/DIG. 13
• US Class Current: 604/154
• CPC Class Codes: A61M 5/1456 with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir
• CPC Class Codes: A61M 5/16854 by monitoring line pressure
• CPC Class Codes: Y10S 128/12 Pressure infusion

Abstract

A syringe pump is disclosed having a transducer for detecting the force on the syringe pusher. The detected force is translated into a pressure which is continuously displayed so that the user can anticipate the occurrence of an occlusion. The syringe pump also has a device for pre-selecting a range of acceptable pressures.

Claims

1. A syringe pump for pumping fluid from a syringe, the pump comprising:

means for detecting the pressure in the syringe substantially continuously; and

means for displaying the pressure in the syringe substantially continuously such that the pressure in the syringe can be monitored during pumping.

2. The syringe pump of claim 1 wherein the means for detecting the pressure comprises:

means for measuring the force on the plunger of the syringe; and

means for converting the measured force to a pressure.

3. The syringe pump of claim 1 further comprising:

means for selecting an acceptable pressure range in the syringe; and

means for indicating the selected acceptable pressure range.

4. The syringe pump of claim 3 wherein the means for displaying comprise a digital segmented display.

5. The syringe pump of claim 4 wherein the digital segmented display comprises means for displaying the pressure in analog form.

6. The syringe pump of claim 3 wherein the means for displaying comprise a pointer for indicating the pressure in the syringe.

7. The syringe pump of claim 3 wherein the means for indicating the selected acceptable pressure range comprise three regions, a first region for low pressures, a second region for medium pressures and a third region for high pressures.