System and method for tension-activated fluid control
First Claim
1. A system for percutaneous infusion of an internal wound site, the system comprising:
- a conduit positioned to convey a first fluid toward the internal wound site;
a rotor positioned to impinge against the conduit to urge the first fluid to move through the conduit; and
a valve positioned to impede flow of the first fluid through the conduit in response to absence of impingement of the rotor against the conduit, the valve comprising a rigid valve seat formed separately from the conduit and a rigid plunger movable along an axis of the conduit relative to the valve seat, wherein the valve extends coaxially with the conduit when the valve is in an open configuration, wherein the open configuration occurs in response to elongation of the conduit between the plunger and the valve seat.
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0 Petitions
Accused Products
Abstract
A medication infusion system may include a controller and a reservoir module including a reservoir containing medication to be delivered to an internal wound site via the controller. The controller may have a peristaltic pump driven by a motor to urge medication to flow toward the internal wound site, through a conduit. When the conduit is not tensioned via engagement with the pump, a valve blocks fluid flow to prevent unrestricted flow of medication. The valve may have a tapered plunger separated from an annular valve seat by a portion of the conduit that elongates under tension to enable withdrawal of the plunger from the valve seat. Alternatively, the valve may have features such as a spherical plunger between two annular valve seats, a rigid tubular member biased with respect to the conduit, or an opening in the conduit that moves axially or radially to enable fluid flow.
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Citations
36 Claims
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1. A system for percutaneous infusion of an internal wound site, the system comprising:
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a conduit positioned to convey a first fluid toward the internal wound site; a rotor positioned to impinge against the conduit to urge the first fluid to move through the conduit; and a valve positioned to impede flow of the first fluid through the conduit in response to absence of impingement of the rotor against the conduit, the valve comprising a rigid valve seat formed separately from the conduit and a rigid plunger movable along an axis of the conduit relative to the valve seat, wherein the valve extends coaxially with the conduit when the valve is in an open configuration, wherein the open configuration occurs in response to elongation of the conduit between the plunger and the valve seat. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A peristaltic pump comprising:
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a monolithic conduit positioned to convey a first fluid; a plurality of rotor pins about which the conduit is tightly routable such that tension in the conduit causes opposing sides of the conduit to press against each other proximate each of the rotor pins to impede flow of the first fluid past the rotor pins, wherein the rotor pins are rotatable about an axis of rotation to urge the first fluid to move through the conduit; and a rigid plunger positioned to disengage from a rigid valve seat formed separately from the conduit to permit flow of the first fluid through the conduit in response to elongation of the conduit between the plunger and the valve seat due to impingement of the rotor pins against the conduit. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A method for percutaneously infusing an internal wound site through the use of a system comprising a peristaltic pump having a conduit and a rotor, the method comprising:
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tightly routing the conduit about the rotor, wherein the conduit is monolithic; disengaging a rigid plunger from a rigid valve seat formed separately from the conduit to open the valve in response to elongation of the conduit between the plunger and the valve seat due to tight routing of the conduit about the rotor; and moving the rotor along the conduit to urge a first fluid to move through the conduit, toward the internal wound site. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification