Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1982-07-30
1984-11-13
Truluck, Dalton L.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
128DIG12, 417240, 417417, A61M 500
Patent
active
044823460
ABSTRACT:
An integral valve and pumping unit is provided for infusing medication into the body which employs only one moving part. This pumping unit is connected to the medication supply reservoir through a first flow restriction device which has no moving parts but has directional flow characteristics so that liquid medication can flow readily from the reservoir to the pumping unit but flow from the pumping unit to the reservoir encounters a relatively high resistance. A second flow restriction device is connected between the pumping unit and the outlet catheter which is employed to infuse medication into the body, this second flow restriction device likewise having no moving parts and offering relatively little resistance to liquid flow from the pumping unit to the catheter while having relatively high resistance to flow in the opposite direction. The valve portion of the integral valve-pump unit ensures that no liquid can flow either from the reservoir to the catheter or vice versa, when the pumping unit is inoperative or when the reservoir is being filled.
REFERENCES:
patent: 3559644 (1971-02-01), Stoft et al.
patent: 3751188 (1973-08-01), Willinger et al.
patent: 4193397 (1980-03-01), Tucker et al.
patent: 4209014 (1980-06-01), Sefton
patent: 4274407 (1981-06-01), Scarlett
Consolidated Controls Corporation
Truluck Dalton L.
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