Syringe system
First Claim
1. An in-line volumetric reducer useable to advance a predetermined volume of liquid to an open end of a fluid-delivery catheter comprising:
- a rigid housing defining;
a proximal opening attachable to a distal end of a hydraulic pressure line, said line having a proximal end in fluid communication with a plunger, whereby said proximal opening is in fluid communication with said pressure line when attached thereto;
a first inner chamber extending distally from said proximal opening and having a predetermined, substantially uniform, cross-sectional area along a predetermined linear axis;
a distal opening attachable to a proximal end of a catheter such that said distal opening is in fluid communication with said catheter when attached thereto; and
, a second inner chamber extending proximally from said distal opening and having a predetermined, substantially uniform cross-sectional area along a predetermined linear axis, wherein said cross-sectional area of said second inner chamber is smaller than said cross-sectional area of said first inner chamber;
a piston assembly including;
a first piston operably disposed within said first inner chamber and having a proximal side and a distal side, said first piston forming a substantially liquid-tight seal with said rigid housing such that pressurized liquid on said proximal side of said first piston is not able to pass around said first piston to said distal side of said first piston; and
, a second piston operably disposed within said second inner chamber and having a proximal side and a distal side, said second piston forming a substantially liquid-tight seal with said rigid housing such that liquid on said distal side of said second piston is not able to pass around said second piston to said proximal side of said second piston;
wherein said first piston is operably attached to said second piston such that when said first piston is moved linearly a predetermined distance, said second piston moves linearly an equal distance to said predetermined distance.
1 Assignment
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Accused Products
Abstract
A medical device is provided having a needle or a catheter, insertable into a living body, which defines a plurality of holes in fluid communication with a central lumen. The holes may be of various patterns located and angled to create a desired injectate cloud pattern when an injectate is forced through the central lumen and through the plurality of holes. One embodiment provides various designs including a moveable sheath or stylet used to selectively occlude one or more of the holes while in use, thereby providing an operating physician a way to manipulate the cloud pattern anytime during the introduction of the injectate. A reducer may be used in conjunction with these needles which provides an increased degree of control when injecting very small quantities of fluid.
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Citations
84 Claims
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1. An in-line volumetric reducer useable to advance a predetermined volume of liquid to an open end of a fluid-delivery catheter comprising:
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a rigid housing defining;
a proximal opening attachable to a distal end of a hydraulic pressure line, said line having a proximal end in fluid communication with a plunger, whereby said proximal opening is in fluid communication with said pressure line when attached thereto;
a first inner chamber extending distally from said proximal opening and having a predetermined, substantially uniform, cross-sectional area along a predetermined linear axis;
a distal opening attachable to a proximal end of a catheter such that said distal opening is in fluid communication with said catheter when attached thereto; and
,a second inner chamber extending proximally from said distal opening and having a predetermined, substantially uniform cross-sectional area along a predetermined linear axis, wherein said cross-sectional area of said second inner chamber is smaller than said cross-sectional area of said first inner chamber;
a piston assembly including;
a first piston operably disposed within said first inner chamber and having a proximal side and a distal side, said first piston forming a substantially liquid-tight seal with said rigid housing such that pressurized liquid on said proximal side of said first piston is not able to pass around said first piston to said distal side of said first piston; and
,a second piston operably disposed within said second inner chamber and having a proximal side and a distal side, said second piston forming a substantially liquid-tight seal with said rigid housing such that liquid on said distal side of said second piston is not able to pass around said second piston to said proximal side of said second piston;
wherein said first piston is operably attached to said second piston such that when said first piston is moved linearly a predetermined distance, said second piston moves linearly an equal distance to said predetermined distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 79)
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27. An in-line volumetric reducer useable to advance a predetermined volume of liquid to an open end of a fluid delivery lumen comprising:
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a first cylinder having a proximal end defining a proximal opening and a distal end defining a distal opening;
a second cylinder having a proximal end defining a proximal opening and a distal end defining a distal opening, said second cylinder having a smaller diameter than said first cylinder;
a first piston operably disposed in said first cylinder;
a second piston operably disposed in said second cylinder;
wherein said first cylinder distal end is operably connected to said second cylinder proximal end;
wherein said first piston is operably connected with said second piston such that when said first piston travels a predetermined distance within said first cylinder, said second piston travels a distance within said second cylinder which is substantially equal to said predetermined distance.
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39. A method of releasing a predetermined output volume from an output of a lumen of a catheter for a given input volume introduced to an input of said lumen comprising:
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providing a flow reducer in line with said catheter between said input and said output, said reducer having a first piston distal said input and a second piston proximal said output, said first piston constructed and arranged such that when said first piston travels a predetermined distance, said second piston travels a distance substantially equal to said predetermined distance, said first piston having a first diameter and said second piston having a second diameter;
filling that portion of said catheter which extends from said second piston to said output with a desired output fluid;
injecting a predetermined amount of input fluid into said catheter input, thereby moving said first piston a predetermined distance and second piston a distance substantially equal to said predetermined distance;
thereby causing said predetermined output volume of output fluid to exit said catheter output, said output volume equal to the squared ratio of the second diameter to the first diameter.
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40. A method of injecting a predetermined quantity of injectate comprising:
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providing a catheter having a proximal end attached to a supply of pressurized fluid and a distal end in fluid communication with a first component operably containing a first piston;
attaching a second component to a distal end of the first component, the second component operably containing a second piston which is constructed and arranged to move with the first piston, said second piston having a smaller cross sectional area than the first piston, said second component defining a chamber on a distal side of said second piston containing said predetermined quantity of injectate, said second component having a distal end which is operably attached to a hypodermic device;
forcing a predetermined quantity of said pressurized fluid through said catheter to cause said first piston and said second piston to move a predetermined linear distance in a distal direction, thereby forcing said predetermined quantity of injectate out of said hypodermic device. - View Dependent Claims (41)
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42. A medical device capable of creating a cloud of injectate, in tissue, having a predetermined shape, size and concentration, the device comprising:
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an elongate member having a side wall defining a central lumen and having a distal end and a proximal end, the proximal end operably attachable to an injectate providing catheter such that said catheter is in fluid communication with said lumen;
a plurality of holes defined by said side wall and extending from said lumen to an exterior of said side wall;
wherein each of said holes is constructed and arranged to act in concert with each of the other holes to create said shaped cloud when said injectate is forced through said lumen. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 83, 84)
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76. A method of introducing an injectate into tissue comprising:
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providing a device having a holed member and an occluding member slideably attached to said holed member and capable of selectively occluding and uncovering predetermined holes leading to a central lumen in fluid communication with said injectate;
determining a target site in vivo;
determining a desired injectate cloud shape;
introducing said device to said target site;
providing pressurized injectate to said central lumen;
slideably manipulating said occluding member relative to said holed member, thereby uncovering predetermined holes and allowing injectate to be released in the tissue to form the desired cloud shape.
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77. A method of creating a cloud of injectate in tissue having a predetermined size and shape comprising:
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determining a target site in vivo;
determining said predetermined cloud size and shape;
providing a device having an elongate member defining a plurality of holes constructed and arranged to create a variety of cloud shapes in tissue, each of said shapes dependent on a pressure at which injectate is forced through said holes, at least one of said cloud shapes resembling said predetermined cloud shape;
determining said injectate pressure which results in said desired cloud shape;
determining an injectate quantity which results in said desired cloud size;
forcing said determined quantity of injectate through said holes of said elongate member at said determined pressure. - View Dependent Claims (80, 81, 82)
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78. An in-line volumetric amplifier useable to advance a predetermined volume of liquid to an open end of a fluid delivery lumen comprising:
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a first cylinder having a proximal end defining a proximal opening and a distal end defining a distal opening;
a second cylinder having a proximal end defining a proximal opening and a distal end defining a distal opening, said second cylinder having a larger diameter than said first cylinder;
a first piston operably disposed in said first cylinder;
a second piston operably disposed in said second cylinder;
wherein said first cylinder distal end is operably connected to said second cylinder proximal end;
wherein said first piston is operably connected with said second piston such that when said first piston travels a predetermined distance within said first cylinder, said second piston travels a distance within said second cylinder which is substantially equal to said predetermined distance.
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Specification