Roller pump in an extra corporeal support system
First Claim
1. A roller pump comprising:
- a housing having a top and a bottom;
a recess formed in said housing with a surface extending inwardly from the top of said housing;
axle means adapted to said housing in said recess to rotate relative to said housing;
arm means secured to axle means to rotate therewith, said arm means including locking means for removably securing said arm means to said axle means and said axle means including an engagement portion for engaging said arm means, and further including a handle means having a first position extending away from said arm means and a second position in which said handle means is positioned proximate said arm means;
roller means secured to said arm means and positioned proximate said surface for movement therealong upon rotation of said axle means;
adjustment means interpositioned between said axle means and said arm means for moving the arm means and in turn said roller means; and
a latch member movable between a first position in which the latch member engages the engagement portion to secure said arm means to said axle means and a second position in which the latch member is disengaged from the said engagement portion for removal of said roller means from said recess.
1 Assignment
0 Petitions
Accused Products
Abstract
An extracorporeal support system has an inlet catheter which is positioned with its distal end in the right atrium or vena cava of the patient. A roller pump with an inlet pressure sensor is positioned close to its inlet to sense the pressure in the inlet line which pumps the blood through the system to any output catheter positioned in the arterial system of the patient. The system has a shunt with blocking valves to block the flow automatically in the event of an unsafe condition. The system has a microprocessor-based controller for automatic operation of the system components including a servomotor for driving the roller pump at a speed to precisely maintain the inlet pressure at a preselected point. The system includes a blood treatment device such as an oxygenator. The roller pump has an axially adjustable head which is also removable.
87 Citations
12 Claims
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1. A roller pump comprising:
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a housing having a top and a bottom; a recess formed in said housing with a surface extending inwardly from the top of said housing; axle means adapted to said housing in said recess to rotate relative to said housing; arm means secured to axle means to rotate therewith, said arm means including locking means for removably securing said arm means to said axle means and said axle means including an engagement portion for engaging said arm means, and further including a handle means having a first position extending away from said arm means and a second position in which said handle means is positioned proximate said arm means; roller means secured to said arm means and positioned proximate said surface for movement therealong upon rotation of said axle means; adjustment means interpositioned between said axle means and said arm means for moving the arm means and in turn said roller means; and a latch member movable between a first position in which the latch member engages the engagement portion to secure said arm means to said axle means and a second position in which the latch member is disengaged from the said engagement portion for removal of said roller means from said recess. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A roller pump for pumping fluid through a flexible tube, said roller pump comprising:
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a housing having a top, bottom and front, said housing having a keyhole-shaped recess formed in said top extending inwardly therefrom, said recess having a throat with opposite sides opening through said front interconnecting with opposite ends of an arcuate recessed surface, said flexible tube being positionable through said front in said recess along said arcuate recessed surface; axle means rotatably secured to said housing and extending into said recess to be centrally positioned with respect to said arcuate surface; removable locking means for removably securing said pump head means to said axle means, said removable locking means including an engagement portion and a latch member positioned for operation by the user and operable between a first position in which the latch member engages the engagement portion to secure said pump head means to said from axle means and a second position in which the latch member is disengaged from said engagement portion and said pump head is removable from said axle; drive means connectable to said axle means to rotate said axle means relative to said housing; and adjustment means interpositioned between said pump head means and said axle means for moving said pump head means axially toward and away from axle means and in turn said roller means toward and away from said arcuate recessed surface. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification