Devices and methods for sampling biological fluids
First Claim
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1. A drive assembly with collection chambers for sampling biological fluids comprising:
- a) a primary line having an inner cavity surrounded by a wall, said primary line comprising an an inlet end capable of receiving a biological fluid;
b) a fluid reservoir;
c) a waste container;
d) a plurality of sample collection chambers;
e) a peristaltic pump comprising a central rotor and a plurality of rotor housings, each capable of selective engagement with said central rotor, wherein each rotor housing comprises a sample collection line positioned along an inner perimeter and fluidly connected at one end to one of said plurality of collection chambers and at an opposing end to one of a plurality of needles, further wherein said engagement compresses said sample collection line against said central rotor and drives said needle into said inner cavity of said primary line; and
f) a cam assembly comprising a rotatable earn, positionable along said plurality of rotor housings, wherein rotation of said cam in a first position selectively engages one of said rotor housings with said central rotor and rotation in a second position releases said rotor housing from engagement with said central rotor.
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Abstract
Devices, instruments, systems and methods are provided in which a primary line that receives a biological fluid is selectively sampled by a plurality of collection chambers. Selective sampling occurs by selectively accessing the primary line and selective engagement of a sampling pump under control of a microprocessor. Further, the instrument housing reversibly houses a drive assembly and sample collection housing to permit the interchangeability of drive assemblies and collection housings and thus enhance sterility or reduction of cost.
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Citations
15 Claims
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1. A drive assembly with collection chambers for sampling biological fluids comprising:
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a) a primary line having an inner cavity surrounded by a wall, said primary line comprising an an inlet end capable of receiving a biological fluid; b) a fluid reservoir; c) a waste container; d) a plurality of sample collection chambers; e) a peristaltic pump comprising a central rotor and a plurality of rotor housings, each capable of selective engagement with said central rotor, wherein each rotor housing comprises a sample collection line positioned along an inner perimeter and fluidly connected at one end to one of said plurality of collection chambers and at an opposing end to one of a plurality of needles, further wherein said engagement compresses said sample collection line against said central rotor and drives said needle into said inner cavity of said primary line; and f) a cam assembly comprising a rotatable earn, positionable along said plurality of rotor housings, wherein rotation of said cam in a first position selectively engages one of said rotor housings with said central rotor and rotation in a second position releases said rotor housing from engagement with said central rotor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification