Pressure-transmitting diaphragm system for infusions

Claim 2

A pressure-transmitting diaphragm system for infusions, comprising: a source of infusion substance; a catheter; an infusion line connecting said catheter to said infusion source; a pressure transducer mounted in a pressure sensor; a closed pressure line containing air connected between said infusion line and said pressure transducer, said transducer being removably mounted in said pressure sensor; said pressure sensor having a mounting member with an opening for removably holding said transducer; spring means for securing said transducer in said opening for sterile separation between said transducer and said pressure sensor; and means connected to said pressure sensor for generating a warning alarm signal when pressure in said pressure line exceeds a predetermined threshold, said warning alarm signal having only two states to indicate whether or not said threshold is exceeded.

Claim 3

A pressure-transmitting diaphragm system for infusions as defined in claim 1, including a T connector at a junction connecting said catheter with said infusion line and said pressure line.

Claim 4

A pressure-transmitting diaphragm system as defined in claim 2, including tubular sections mounted on ends of said T connector and having male and female connectors at ends of said tubular sections connected to said infusion line and said catheter.

Claim 5

A pressure-transmitting diaphragm system as defined in claim 1, wherein said pressure transducer has a frame member; an inflatable diaphragm held in said frame member; and means for connecting said frame member to said pressure line.

Claim 6

A pressure-transmitting diaphragm system as defined in claim 4, wherein said frame member has a circular opening for holding said diaphragm said diaphragm having a circular shape.

Claim 7

A pressure-transmitting diaphragm system as defined in claim 4, including a contact plate in said mounting member of said pressure sensor, said transducer resting against said contact plate, said transducer being subjected to a force opposite the direction of expansion of said diaphragm.

Claim 8

A pressure-transmitting diaphragm system as defined in claim 6, including a pressure-sensitive switch inside said mounting member of said pressure sensor, said contact plate having a path of motion; said pressure-sensitive switch being located in said path of motion of said contact plate.

Claim 9

A pressure-transmitting diaphragm system as defined in claim 7, including means for mounting said pressure-sensitive switch and being adjustable relative to said mounting member of said pressure sensor.

Claim 10

A pressure-transmitting diaphragm system as defined in claim 1, including signal generating means connected to said pressure sensor and having electronic circuits for processing a signal generated when pressure in said pressure line exceeds a predetermined level; and alarm generator means connected to said signal generator means for providing an alarm when pressure in said pressure line has exceeded said predetermined threshold.

Claim 11

A pressure-transmitting diaphragm system as defined in claim 1, including signal generator means connected to said pressure sensor and having electronic circuit means for processing a signal when pressure in said pressure line exceeds a predetermined threshold; and computer means connected to said signal generator means for receiving said processed signal.

Claim 12

A pressure-transmitting diaphragm system for infusions, comprising: a source of infusion substance; a catheter; an infusion line connecting said catheter to said infusion source; a pressure transducer mounted in a pressure sensor; a closed pressure line containing air connected between said infusion line and said pressure transducer, said transducer being removably mounted in said pressure sensor; said pressure sensor having a mounting member with an opening for removably holding said transducer; spring means for securing said transducer in said opening for sterile separation between said transducer and said pressure sensor; and means connected to said pressure sensor for generating a warning alarm signal when pressure in said pressure line exceeds a predetermined threshold, said warning alarm signal having only two states to indicated whether or not said threshold is exceeded; a T connector at a junction connecting said catheter with said infusion line and said pressure line; tubular sections on ends of said T connector and having male and female connectors at ends of said sections connected with said catheter and said infusion line; a transducer mounting member connected to said pressure line; an inflatable diaphragm held by said transducer mounting member; said transducer mounting member having a circular opening for holding said diaphragm, said diaphragm having a circular shape; a contact plate in said pressure sensor, said diaphragm resting against said contact plate, said contact plate being subjected to a force opposite to the direction of expansion of said diaphragm; a pressure-sensitive switch in said mounting member of said pressure sensor, said contact plate having a path of motion; said pressure-sensitive switch being located in said path of motion of said contact plate; switch mounting means for mounting said pressure-sensitive switch and being adjustable relative to said mounting member of said pressure sensor; signal generator means connected to said pressure sensor for providing a signal when pressure in said pressure line exceeds a predetermined threshold; said signal generator means having electronic circuit means for processing said signal; an alarm generator means for receiving said signal from said signal generator means to provide an alarm when pressure in said pressure line exceeds said predetermined threshold.

Claim 13

A pressure-transmitting diaphragm system for infusions, comprising: a source of infusion substance; a catheter; an infusion line connecting said catheter to said infusion source; a pressure transducer mounted in a pressure sensor; a closed pressure line containing air connected between said infusion line and said pressure transducer, said transducer being removably mounted in said pressure sensor; said pressure sensor having a mounting member with an opening for removably holding said transducer; spring means for securing said transducer in said opening for sterile separation between said transducer and said pressure sensor; and means connected to said pressure sensor for generating a warning alarm signal when pressure in said pressure line exceeds a predetermined threshold, said warning alarm signal having only two states to indicated whether or not said threshold is exceeded; a T connector at a junction connecting said catheter with said infusion line and said pressure line; tubular sections on ends of said T connector and having male and female connectors at ends of said sections connected with said catheter and said infusion line; a transducer mounting member connected to said pressure line; an inflatable diaphragm held by said transducer mounting member; said transducer mounting member having a circular opening for holding said diaphragm, said diaphragm having a circular shape; a contact plate in said pressure sensor, said diaphragm resting against said contact plate, said contact plate being subjected to a force opposite to the direction of expansion of said diaphragm; a pressure-sensitive switch in said mounting member of said pressure sensor, said contact plate having a path of motion; said pressure-sensitive switch being located in said path of motion of said contact plate; switch mounting means for mounting said pressure-sensitive switch and being adjustable relative to said mounting member of said pressure sensor; signal generator means connected to said pressure sensor for providing a signal when pressure in said pressure line exceeds a predetermined threshold; said signal generator means having electronic circuit means for processing said signal; an alarm generator means for receiving said signal from said signal generator means to provide an alarm when pressure in said pressure line exceeds said predetermined threshold.