Medical pressure multiplexing system
First Claim
1. A pressure multiplexing system for selectively communicating at least a first fluid pressure and a second fluid pressure to a transducer means for detecting said pressures and to an infusion means for infusing fluids, the first and second fluid pressures being communicated from within a patient'"'"'s body by a catheter, and the pressure multiplexing system comprising:
- a valve body comprising a central bore therein;
rotor means disposed within said bore and rotatable between a first and a second monitoring position;
first and second port means for simultaneously introducing said first and second fluid pressures to said rotor means;
transducer port means for providing fluid communication between said rotor means and said transducer means;
infusion port means for providing fluid communication between said rotor means and said infusion means;
first interconnecting means associated with said rotor means for interconnecting one of said first and second port means to said transducer port means and for simultaneously interconnecting the other of said first and second port means to said infusion port means when said rotor means is in said first position; and
second interconnecting means associated with said rotor means for interconnecting said other of said first and second port means to said transducer port means when said rotor means is in said second position.
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Accused Products
Abstract
A system and method for multiplexing two lumens of a catheter to a single pressure transducer and monitor setup such that the pressure found in either of the two lumens may be alternately monitored. Included in the present invention is a pressure multiplexing valve provided with a four-port body and a rotor which may be selectively rotated to either of two monitoring positions. The rotor is provided with passageways that interconnect the ports. In one embodiment both catheter lumens are always connected to a medical infusion device regardless of which lumen is connected to the transducer. In another embodiment, one lumen is shut off when not connected to the transducer. The present invention provides a compact system removably mounted on a single carrier.
61 Citations
45 Claims
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1. A pressure multiplexing system for selectively communicating at least a first fluid pressure and a second fluid pressure to a transducer means for detecting said pressures and to an infusion means for infusing fluids, the first and second fluid pressures being communicated from within a patient'"'"'s body by a catheter, and the pressure multiplexing system comprising:
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a valve body comprising a central bore therein; rotor means disposed within said bore and rotatable between a first and a second monitoring position; first and second port means for simultaneously introducing said first and second fluid pressures to said rotor means; transducer port means for providing fluid communication between said rotor means and said transducer means; infusion port means for providing fluid communication between said rotor means and said infusion means; first interconnecting means associated with said rotor means for interconnecting one of said first and second port means to said transducer port means and for simultaneously interconnecting the other of said first and second port means to said infusion port means when said rotor means is in said first position; and second interconnecting means associated with said rotor means for interconnecting said other of said first and second port means to said transducer port means when said rotor means is in said second position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A pressure multiplexing system for selectively communicating a pulmonary artery pressure communicated by a first catheter lumen and a central venous pressure communicated by a second catheter lumen to a single pressure transducer and an infusion device, said pressure multiplexing system comprising:
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a valve body comprising a cylindrical bore therein; first and second lumen port means for providing simultaneous fluid communication between said first and second catheter lumens, respectively, and said cylindrical bore; transducer port means for providing fluid communication between said cylindrical bore and said transducer; infusion port means for providing fluid communication between said cylindrical bore and said infusion device; a rotor disposed within said cylindrical bore and rotatable about a central axis between a first monitoring position wherein one of said pulmonary artery and central venous pressures is detected by said pressure transducer and a second monitoring position wherein the other of said pulmonary artery and central venous pressures is detected by said pressure transducer; first passageway means associated with said rotor for interconnecting one of said first and second lumen port means with said infusion port means when said rotor is in the first monitoring position; second passageway means associated with said rotor for interconnecting the other of said first and second lumen port means with said transducer port means when said rotor is in the first monitoring position; and third passageway means associated with said rotor for interconnecting said one of said first and second lumen port means with the transducer port when said rotor is in said second monitoring position. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An apparatus for selectively connecting at least a first and a second lumen of a multilumen catheter to a single pressure transducer and an infusion device, the apparatus comprising:
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a valve body having a cylindrical bore provided therein; a first lumen port provided at said valve body and interconnected to one of the first and second lumens; a transducer port provided at said valve body and interconnected to the transducer, said first lumen port and the transducer port being located opposite one another on the circumference of said valve body and at substantially the same first height on said valve body; a second lumen port provided at said valve body and simultaneously interconnected to the other of said first and second lumens; an infusion device port provided at said valve body and interconnected to the infusion device, the second lumen port and the infusion device port being located opposite one another on the circumference of said valve body and at a substantially same second height on said valve body that is vertically offset from said first height; a cylindrical rotor disposed within said bore, the circumference of the rotor being in fluid-tight engagement with said bore and positionable at first and second pressure monitoring positions; a first passageway provided through the rotor so as to interconnect the second lumen port with the infusion device port when the rotor is in the first monitoring position; a second passageway provided through the rotor so as to simultaneously interconnect the first lumen port with the transducer port when the rotor is in the first monitoring position; and a third passageway provided on the rotor so as to interconnect the second lumen port with the transducer port when the rotor is in the second monitoring position, whereby either the pressure found in the first lumen or the second lumen may be selectively monitored by a single pressure transducer. - View Dependent Claims (28, 29, 30)
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31. An apparatus for selectively monitoring pulmonary artery pressure (PAP) and central venous pressure (CVP) using a multilumen catheter, a pressure transducer, and an infusion device, the apparatus comprising:
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a valve body having a cylindrical bore; a CVP port extending through the valve body into said bore; means for connecting the CVP port to a first lumen of said catheter; a PAP port extending through the valve body into said bore; means for connecting the PAP port to a second lumen of said catheter; a transducer port extending through the valve body into said bore; means for connecting the transducer port to said pressure transducer; an infusion port extending through the valve body into said bore; means for connecting the infusion port to said infusion device; a rotor disposed within the interior of said bore, the rotor being rotatable between a first position and a second position; a first passageway formed in the rotor interconnecting the CVP port with the infusion port when the rotor is in the first position; a second passageway formed in the rotor interconnecting the PAP port with the transducer port when the rotor is in the first position; a third passageway formed in the rotor interconnecting the CVP port with the transducer port when the rotor is in the second position; and a fourth passageway formed in the rotor interconnecting the PAP port with the infusion port when the rotor is in the second position, whereby either the PAP pressure or the CVP pressure, respectively, may be monitored by rotating the rotor to the first or second position. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38)
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39. A method of alternately monitoring at least a first biological fluid pressure and a second biological fluid pressure using a pressure multiplexing system comprising a multilumen catheter inserted into a patient'"'"'s body for communicating the first and second pressures, a valve body having a bore, a rotatable rotor disposed in the bore, transducer means for detecting said pressures, and infusion means for infusing fluids, the method comprising the steps of:
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communicating said first and second pressures to said rotor; positioning the rotor in a first monitoring position so as to interconnect the first fluid pressure with the transducer means and so as to simultaneously interconnect the second fluid pressure with the infusion means; and rotating the rotor to a second monitoring position so as to interconnect the second fluid pressure with the transducer means while simultaneously disconnecting the first fluid pressure from the transducer means. - View Dependent Claims (40, 41, 42, 43)
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44. A method of alternately monitoring central venous pressure (CVP) and pulmonary artery pressure (PAP) using a pressure multiplexing system comprising a multilumen catheter, a valve body having a cylindrical bore and a plurality of ports in fluid communication with the cylindrical bore, a rotatable rotor disposed within the cylindrical bore, a pressure transducer, and an infusion device, the method comprising the steps of:
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simultaneously communicating said first and second fluid pressures to said rotor bore through a first and a second port, respectively; connecting said pressure transducer to said cylindrical bore through a third port; connecting said infusion device to said cylindrical bore through a fourth port; positioning said rotor in a first position;
interconnecting said first port with said third port and simultaneously interconnecting said second port with said fourth port when said rotor is in a first position;rotating the rotor to a second position; and interconnecting the second port with the third port when the rotor is in the second position. - View Dependent Claims (45)
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Specification