Orthopedic autotransfusion system
First Claim
1. A medical device for withdrawing blood from the site of an operation by a tube which has been connected for drainage therefrom comprising:
- a reservoir with walls of sufficient strength to resist collapse under a given vacuum;
an inlet port of said reservoir for connection of the tube connected to the operation site;
an outlet means from said reservoir;
a hand operated piston type displacement pump in connected relationship to said reservoir for withdrawing air from said reservoir and creating an attendant vacuum,means for reciprocating said piston type displacement pump; and
,means for checking the introduction of air into the reservoir after a displacement thereof has taken place.
1 Assignment
0 Petitions
Accused Products
Abstract
The following disclosure comprises a medical autotransfusion and blood drainage reservoir for withdrawing blood from the site of an operation under vacuum. A walled reservoir is connected to the operation site and a vacuum is drawn therein to draw fluids from the operation site. Vacuum is provided by a piston pump connected to check valves. The check valves allow for movement of the piston pump in one direction to discharge air therefrom, and in the other direction to withdraw air from the reservoir. Alternatively a spring driven bellows can be used to draw a vacuum with attendant check valves. The inlet of blood flow is through a filter. Blood is then capable of flowing outwardly to be reinfused by autotransfusion or reinfusion at a later time. Vacuum indication means and bleed off valves are included for maintenance of a proper vacuum.
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Citations
15 Claims
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1. A medical device for withdrawing blood from the site of an operation by a tube which has been connected for drainage therefrom comprising:
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a reservoir with walls of sufficient strength to resist collapse under a given vacuum; an inlet port of said reservoir for connection of the tube connected to the operation site; an outlet means from said reservoir; a hand operated piston type displacement pump in connected relationship to said reservoir for withdrawing air from said reservoir and creating an attendant vacuum, means for reciprocating said piston type displacement pump; and
,means for checking the introduction of air into the reservoir after a displacement thereof has taken place. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A device for providing autotransfusion and/or withdrawal of fluids from the site of an operation wherein an inlet tube has been connected to the site of the operation comprising:
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a walled reservoir having a bottom, and a top thereto; means for connecting the inlet tube from an operation site to said reservoir; means for filtering the flow of blood from the inlet tube into the reservoir; a piston pump connected to said reservoir having respective check valves to provide a discharge from said pump of air therein to atmosphere and withdrawal of air from said reservoir to provide a vacuum therein; and
,means for reciprocating said piston pump to provide the respective discharge and withdrawal functions. - View Dependent Claims (10, 11, 12, 13, 14)
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15. The method of withdrawing blood from the site of an operation by a tube which is connected in proximate relationship to said site comprising:
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providing a reservoir with walls of sufficient strength to resist collapse under a given vacuum; connecting said reservoir to said operation site by means of a tube; providing a hand operated displacement piston pump connected to said reservoir; moving said hand operated pump for purposes of creating a vacuum; checking flow from said hand operated pump into said reservoir when said pump is moving to discharge air from said pump for discharge to atmosphere; and
,checking atmospheric flow into said pump when said pump is drawing vacuum from said reservoir.
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Specification