Single use system for preparation of autologous plasma
First Claim
1. A single use system for obtaining autologous plasma comprising a plasma separator for separating plasma from whole blood, the plasma separator comprising:
- a single use filter unit comprising a first inlet and a second inlet in fluid communication with each other, an outlet, and a filtration membrane separating the inlets from the outlet, the filtration membrane being selectively permeable to blood plasma;
a manually operable, single use first pump comprising a first receiving chamber connected to the first inlet, the first receiving chamber being defined in part by a manually moveable first wall wherein movement of the first wall alters the volume of the first receiving chamber;
a manually operable, single use second pump comprising a second receiving chamber connected to the second inlet, the second receiving chamber being defined in part by a manually moveable second wall wherein movement of the second wall alters the volume of the second receiving chamber; and
a flow path along the membrane between the first and second pumps;
whereby to repeatedly exchange whole blood between the first and second receiving chambers past the membrane, whereby to allow plasma to flow across the membrane and out of the outlet.
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Accused Products
Abstract
A system for preparing autologous plasma comprises a single use filter unit having two inlets in fluid communication with each other, an outlet, and a filtration membrane selectively permeable to blood plasma separating the inlets from the outlet. Manually operable, single use pumps, preferably syringes, connect to the inlets. A flow path is defined along the membrane between the pumps, whereby, whole blood can be repeatedly exchanged between the two pumps, past the membrane, to cause plasma to flow across the membrane and out of the outlet. A syringe can collect plasma from the outlet. Plasma thus collected can be simultaneously applied with a thrombin solution to a site on the body, thereby forming a fibrin gel.
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Citations
6 Claims
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1. A single use system for obtaining autologous plasma comprising a plasma separator for separating plasma from whole blood, the plasma separator comprising:
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a single use filter unit comprising a first inlet and a second inlet in fluid communication with each other, an outlet, and a filtration membrane separating the inlets from the outlet, the filtration membrane being selectively permeable to blood plasma; a manually operable, single use first pump comprising a first receiving chamber connected to the first inlet, the first receiving chamber being defined in part by a manually moveable first wall wherein movement of the first wall alters the volume of the first receiving chamber; a manually operable, single use second pump comprising a second receiving chamber connected to the second inlet, the second receiving chamber being defined in part by a manually moveable second wall wherein movement of the second wall alters the volume of the second receiving chamber; and a flow path along the membrane between the first and second pumps; whereby to repeatedly exchange whole blood between the first and second receiving chambers past the membrane, whereby to allow plasma to flow across the membrane and out of the outlet. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification