Aspiration control valve

Abstract

An aspiration control device can have an aspiration control valve and a switch, button, slider, trigger, grip, lever, rotating wheel, rotating valve, handle or other interface for resizing the aspiration control valve. The aspiration control interface can be conveniently positioned and configured to be manipulated while simultaneously stabilizing a catheter and/or retracting an elongated member. The aspiration control device can be integrated with a hemostasis valve, integrated with a wire gripping device, and/or attached to an inlet, outlet, hose, pump, or syringe in series with an aspiration flow path.

1 . A system comprising:
 a hemostasis valve comprising an entrance to receive a catheter;   a control valve in communication with the hemostasis valve, the control valve comprising an opening movable between a first dimension sized to limit flow of aspirated blood from the catheter at a first flow rate to a second dimension sized to limit the flow of aspirated blood from the catheter at a second flow rate; and   a control interface in communication with the control valve, the control interface movable to move the opening of the control valve from the first dimension to the second dimension.   
     
     
         2 . The system of  claim 1 , wherein hemostasis valve further comprises a side port, and wherein the control valve is disposed approximate the side port. 
     
     
         3 . The system of  claim 2 , wherein the control valve is positioned to provide a flow path for the flow of aspirated blood, the flow path extending from the catheter, through the control valve, and to the side port. 
     
     
         4 . The system of  claim 1 , wherein the control valve, the control interface, and the hemostasis valve are affixed to a common housing. 
     
     
         5 . The system of  claim 1 , wherein the control interface is positioned to allow a user to select one of the first flow rate or the second flow rate with a single hand while stabilizing the catheter with the single hand. 
     
     
         6 . The system of  claim 1 , wherein the control interface is movable to select at least one of the first flow rate or the second flow rate based at least in part on a force applied to the control interface. 
     
     
         7 . The system of  claim 1 , wherein the opening is movable through a continuum of dimensions between the first dimension and the second dimension such that flow of aspirated blood is controllable over a continuum of flow rates between the first flow rate and the second flow rate. 
     
     
         8 . The system of  claim 1 , wherein the hemostasis valve further comprises:
 an exit sized to pass an inner elongated member disposed within a lumen of the catheter;   a seal disposed approximate the exit;   a locking actuator displaceable to open the seal in a first position, semi-open the seal a second position, and close the seal in a third position; and   a hemostatic indicator movable to provide a visual indication of the position of the locking actuator.   
     
     
         9 . The system of  claim 8 ,
 wherein the hemostatic indicator comprises an indexed indicator corresponding to a predetermined semi-open position of the locking actuator,   wherein in the predetermined semi-open position, the locking actuator is sized to allow the inner elongated member comprising an inner diameter of between about 0.017 inches and 0.021 inches to slidably translate through the locking actuator, and   wherein in the predetermined semi-open position, the locking actuator is sized to inhibit air ingress from around the inner elongated member into the hemostasis valve.   
     
     
         10 . An apparatus comprising:
 a distal port sized to receive a catheter;   a proximal port sized to allow passage of an inner elongated member, the inner elongated member disposed within a lumen of the catheter;   a first side port;   a first flow path extending from the lumen of the catheter to the first side port;   a control valve in communication with the lumen of the catheter and the first side port, the control valve movable to control blood flow through the first flow path; and   a control interface in communication with the control valve, the control interface comprising at least two positions, the at least two positions corresponding to at least two flow rates of the blood flow through the first flow path.   
     
     
         11 . The apparatus of  claim 10 , wherein the control interface comprises a sliding button positioned to allow a user to simultaneously select one of the at least two positions with a single hand while stabilizing the catheter with the single hand. 
     
     
         12 . The apparatus of  claim 10 , wherein the control interface comprises a push button movable between the at least two position as a result of a force applied to the push button, and wherein the push button is positioned to allow a user to simultaneously select one of the at least two positions with a single hand while stabilizing the catheter with the single hand. 
     
     
         13 . The apparatus of  claim 10 , further comprising:
 a second side port; and   a second flow path extending from the second side port to the first side port,
 wherein the control valve is in communication with the second side port and the first side port, and 
 wherein the control valve is movable to control the blood flow through the second flow path. 
   
     
     
         14 . A method for aspirating blood flow, the method comprising:
 providing a hemostasis valve comprising a distal port and a side port;   providing an aspiration control device comprising a control valve and a control interface;   positioning the aspiration control device approximate the side port;   providing a catheter;   positioning the catheter in the distal port of the hemostasis valve;   providing a vacuum source;   providing a flow path from a lumen of the catheter to the side port;   positioning the control valve of the aspiration control device in the flow path;   providing a vacuum to the flow path with the vacuum source; and   manipulating the control interface to control a flow rate through the flow path.   
     
     
         15 . The method of  claim 14 , further comprising:
 stabilizing the catheter with a first hand while simultaneously manipulating the control interface with the single hand.   
     
     
         16 . The method of  claim 14 , further comprising:
 disposing the hemostasis valve and the aspiration control device in a common housing.   
     
     
         17 . The method of  claim 14 , further comprising:
 positioning a flexible tubing in the flow path, the flexible tubing comprising an opening;   providing a compression element in communication with the control interface;   positioning the compression element to engage the flexible tubing; and   moving the compression element to resize the opening of the flexible tubing by manipulating the control interface.   
     
     
         18 . The method of  claim 17 , further comprising:
 providing a housing comprising an opening;   positioning the flexible tubing in the housing; and   positioning the compression element in the opening in the housing.   
     
     
         19 . The method of  claim 14 , wherein manipulating the control interface to control a flow rate through the flow path comprises:
 moving the control interface from an initial position by applying a force to the control interface.   
     
     
         20 . The method of  claim 19 , further comprising:
 releasing the control interface; and   returning the control interface to the initial position.