A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
128/90
A61M 5/14 (2006.01) A61M 5/168 (2006.01)
Patent
CA 1286180
ABSTRACT An administration set which is suitable for giving an infusion of liquid to a patient by gravity flow from a container of liquid through the set and to the patient is described. The administration set comprises a fluid reservoir, a flow regulator and a barostat device which compensates for changes in fluid pressure during the infusion. The fluid reservoir is positioned upstream of the flow regulator and the barostat device is downstream of the flow regulator. In a preferred embodiment a piercing needle connects with a closable tube and injection site which enter the main body of the reservoir by a secure seal. One side of the top of the reservoir extends in a curving manner to be in front of the closable tube and joins an air channel that leads to an airtight chamber which holds the barostat device. An outlet passage leads from the bottom of the reservoir to a collapsible region and descends to an outlet tube which leads via the regulator to the barostat device. A resistive pathway is formed between the ascending and descending parts of the outlet passageway whereby the reservoir may empty slowly when the collapsible region is collapsed. A drip-chamber may be placed in the infusion tube. A collapsible tube is placed downstream of the barostat device. PAT 9013-1
532463
Borden Ladner Gervais Llp
Clarke Ellis Whiteside
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