Dual mode I. V. infusion device
First Claim
1. A device for infusing I.V. medical fluids from a fluid source to a patient through an I.V. tubing having a compressible pumping section, which device comprises:
- a case;
means for holding a portion of said compressible pumping section on said case;
peristaltic means mounted on said case and operatively engaged with said tube to sequentially squeeze said pumping section and produce at least one moving zone of occlusion along said pumping section for infusing fluids to the patient;
a gauge fixedly mounted on said case and operatively coupled with said pumping section, at a predetermined location thereon, for sensing fluid pressure in said pumping section at said location at a first time when said I.V. tube downstream from said location is patent and at a second time when said I.V. tube upstream from said location is patent;
means to determine a pressure differential between said first time and said second time; and
means to alarm and cease operation of said device when said pressure differential attains a predetermined value.
17 Assignments
0 Petitions
Accused Products
Abstract
A dual mode peristaltic device is provided for infusing I.V. solutions to a patient through an I.V. tube. In a first mode of operation, the device functions as a peristaltic pump and in the second mode of operation it functions like a controller. Included in the device and associated with the I.V. tube is a pressure sensing strain gauge assembly that monitors dimensional changes in the outer diameter of the I.V. tube as an indication of fluid pressure changes in the tube. The strain gauge assembly is positioned relative to the device'"'"'s peristaltic means to alternately monitor fluid pressure in a patent I.V. tube upstream and downstream from the gauge assembly. In the first mode (pump mode), the device is programmed to alarm and cease operation when fluid pressure downstream from the gauge assembly reaches a preselected value. In the second mode (controller mode), the device is programmed to alarm and cease operation when there is no differential between fluid pressure upstream and downstream from the gauge assembly.
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Citations
20 Claims
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1. A device for infusing I.V. medical fluids from a fluid source to a patient through an I.V. tubing having a compressible pumping section, which device comprises:
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a case; means for holding a portion of said compressible pumping section on said case; peristaltic means mounted on said case and operatively engaged with said tube to sequentially squeeze said pumping section and produce at least one moving zone of occlusion along said pumping section for infusing fluids to the patient; a gauge fixedly mounted on said case and operatively coupled with said pumping section, at a predetermined location thereon, for sensing fluid pressure in said pumping section at said location at a first time when said I.V. tube downstream from said location is patent and at a second time when said I.V. tube upstream from said location is patent; means to determine a pressure differential between said first time and said second time; and means to alarm and cease operation of said device when said pressure differential attains a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A device for infusing medical solutions to a patient which comprises:
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a fluid source; a compressible tube connecting said fluid source in fluid communication with the patient; a case having means for engagingly receiving a portion of said tube therein; means mounted on said case and engageable with said portion of said tube for generating a moving zone of occlusion thereon to pump fluid from said source to the patient; a gauge mounted on said case and operatively associated with said tube to alternately measure the outside diameter of said tube at a first time when said tube downstream from said gauge is patent and at a second time when said tube upstream from said gauge is patent; means for comparing the measurement at the first time with the measurement at the second time to establish a differential; and means to alarm said device and cease operation when said differential attains a predetermined value. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for infusing I.V. medical fluids from a fluid source to a patient through an I.V. tube having a compressible pumping section which comprises the steps of:
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A. engaging said pumping section with a device comprising;
a case;
means for holding a portion of said compressible pumping section on said case;
peristaltic means mounted on said case and operatively engaged with said tube to sequentially squeeze said pumping section and produce at least one moving zone of occlusion along said pumping section for infusing fluids to the patient;B. monitoring the fluid pressure at a fixed location of said pumping section with a gauge operatively coupled with said pumping section for sensing fluid pressure in said pumping section at said location at a first time when said I.V. tube downstream from said location is patent and at a second time when said I.V. tube upstream from said location is patent; C. determining a pressure differential between said first time and said second time; and D. discontinuing the infusion of fluids to the patient when said pressure differential attains a predetermined minimum value. - View Dependent Claims (20)
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Specification