Chest drainage device having multiple operation indicators

Claim 2

A drainage device comprising: a housing having front and back surfaces; at least two chambers in said housing and including a pressure regulation chamber and a collection chamber therein and said pressure regulation chamber and said collection chamber are fluidly coupled by means of a vent pathway; wherein the vent pathway includes an intermediate chamber and at least first and second passages, each passage being in fluid communication with the interior of the intermediate chamber; wherein an opening is provided in the first passage, distal from the intermediate chamber, to fluidly couple the first passage and the pressure regulation chamber; wherein an opening is provided in the second passage, distal from the intermediate chamber, to fluidly couple the second passage and the collection chamber; and a negative pressure indicator associated with the collection chamber to provide a visual indication of the existence of negative pressure within the collection chamber through the front surface of the housing and a suction pressure indicator associated with the pressure regulation chamber to indicate the existence of suction pressure in the pressure regulation chamber.

Claim 3

The drainage device of claim 1 further comprising a third passage being spaced from the first and second passages and communicating with the interior of the intermediate chamber and wherein an opening is provided in the third passage, distal from the intermediate chamber, to fluidly couple the third passage and the collection chamber and the suction pressure indicator is associated with the pressure regulation chamber to provide a visual indication of the existence of suction pressure in the pressure regulation chamber through the front surface of the housing.

Claim 4

The drainage device of claim 1 wherein the pressure regulation chamber is fluidly interconnected to a port to atmosphere and a suction line port being interconnected to a suction source and wherein the drainage device further comprises: a suction pressure regulator valve that selectively controls the suction pressure, being developed within the pressure regulation chamber and being applied to the collection chamber, to selected suction pressure levels; wherein the pressure regulation valve includes a mechanism for moving the regulation valve between open and closed positions when the suction pressure of the suction source is different than the selected suction pressure level, thereby isolating the suction line port from the atmospheric port in the closed position, and for opening the valve when the suction pressure of the suction source exceeds the selected suction pressure level, whereby the atmospheric port is fluidly interconnected to the suction line port so as to maintain the suction pressure being applied at about the selected suction pressure level; and wherein the pressure regulation chamber and the collection chamber are in selective fluid communication with each other by a one-way valve disposed therebetween, where in one position the one-way valve isolates the regulation and collection chambers from each other so gas does not flow to the collection chamber and where, in another position, the one-way valve puts the chambers in fluid communication with each other so suction pressure from the pressure regulation chamber is applied to the collection chamber to thereby cause the drainage of fluids from a body cavity.

Claim 5

The drainage device of claim 3 further comprising an air leak meter chamber being fluidly coupled to the collection chamber and the one-way valve, the air leak chamber including a flow meter responsive to the gas flow from the collection chamber and providing a visual indication of a relative flow rate of the gas flowing from the collection chamber to the pressure regulation chamber through the front surface of the housing.

Claim 6

The drainage device of claim 3 further comprising the negative pressure indicator which is fluidly coupled to the collection chamber so the negative pressure indicator provides a visual indication of the presence of negative pressure conditions within the collection chamber wherein at least a portion of the negative pressure indicator collapses in response to the existence of negative pressure in the collection chamber.

Claim 7

The drainage device of claim 3 further including the front surface of the housing having opaque regions thereon and a negative pressure indicator window thereon to allow for the visual observation of the existence of a negative pressure in the collection chamber through the negative pressure indicator window.

Claim 8

The drainage device of claim 6 , wherein the front surface further includes a suction status window and an air leak window thereon to allow for the visual observation of a suction status indicator and an air leak indicator therethrough.

Claim 9

The drainage device of claim 1 wherein the negative pressure indicator includes a message post encased by a flexible membrane and the interior of the flexible membrane is in fluid communication with the collection chamber so the flexible material collapses upon the message post and renders the message thereon visible in response to negative pressure in the collection chamber.

Claim 10

The drainage device of claim 1 further including a wall member separating the pressure regulation chamber and the collection chamber to define a pressure boundary therebetween and a one-way valve on said wall member to allow fluid communication therebetween.

Claim 11

A drainage device comprising: at least two chambers, a pressure regulation chamber and a collection chamber, being interconnected by a plurality of walls and fluidly coupled by a vent pathway; and wherein at least one of said plurality of walls includes an opaque region thereon and a negative pressure indicator window thereon to allow for the visual observation of an indication of a negative pressure in the collection chamber through the negative pressure indicator window.

Claim 12

A drainage device comprising: at least two chambers, a pressure regulation chamber and a collection chamber, being interconnected by a plurality of walls and fluidly coupled by a vent pathway; and wherein at least one of said plurality of walls includes an opaque region thereon and a negative pressure indicator window thereon to allow for the visual observation of an indication of a negative pressure in the collection chamber through the negative pressure indicator window.

Claim 13

The drainage device of claim 10 wherein a negative pressure indicator is associated with the collection chamber to provide a visual indication of the existence of negative pressure within the collection chamber and the negative pressure indicator is visually observable through the negative pressure indicator window located on one of said plurality of walls; and a suction status indicator is associated with the pressure regulation chamber to provide a visual indication of the existence of suction pressure in the pressure regulation chamber and the suction pressure indicator is visually observable through a suction status window located on said one of said plurality of walls.

Claim 14

The drainage device of claim 10 , wherein said one of said plurality of walls further includes an air leak window thereon to allow for the visual observation of an air leak indicator therethrough.

Claim 15

The drainage device of claim 10 further including a wall member separating the pressure regulation chamber and the collection chamber to define a pressure boundary therebetween and a one-way valve on said wall member to allow fluid communication therebetween.

Claim 16

The drainage device of claim 10 wherein the pressure regulation chamber is fluidly interconnected to a port to atmosphere and a suction line port that is interconnected to a suction source and wherein the drainage device further comprises a suction pressure regulator valve that selectively controls the suction pressure being developed within the pressure regulation chamber and applied to the collection chamber to selected suction pressure levels.

Claim 17

The drainage device of claim 14 wherein the pressure regulation valve includes a mechanism for moving the regulation valve between open and closed positions when the suction pressure of the suction source is different than the selected suction pressure level, thereby isolating the suction line port from the atmospheric port in the closed position, and for opening the valve when the suction pressure of the suction source exceeds the selected suction pressure level, whereby the atmospheric port is fluidly interconnected to the suction line port so as to maintain the suction pressure being applied at a level generally about the selected suction pressure level.

Claim 18

The drainage device of claim 10 wherein the negative pressure indicator window includes a message post adjacent thereto and the message post is encased by a flexible membrane, wherein the interior of the flexible membrane is in fluid communication with the collection chamber so the flexible material collapses upon the message post and renders the message thereon visible in response to negative pressure in the collection chamber.

Claim 19

A drainage device comprising: a pressure regulation chamber, an intermediate chamber and a collection chamber, each of said chambers being interconnected by a plurality of walls and fluidly coupled by a vent pathway; a negative pressure indicator associated with and adjacent to the collection chamber to provide a visual indication of the existence of negative pressure within the collection chamber; and wherein at least one of said plurality of walls includes a sidewall having an opaque region thereon and a negative pressure indicator window thereon to allow for the visual observation of the negative pressure indicator through the negative pressure indicator window.

Claim 20

A drainage device comprising: a pressure regulation chamber, an intermediate chamber and a collection chamber, each of said chambers being interconnected by a plurality of walls and fluidly coupled by a vent pathway; a negative pressure indicator associated with and adjacent to the collection chamber to provide a visual indication of the existence of negative pressure within the collection chamber; and wherein at least one of said plurality of walls includes a sidewall having an opaque region thereon and a negative pressure indicator window thereon to allow for the visual observation of the negative pressure indicator through the negative pressure indicator window.

Claim 21

The drainage device of claim 17 further including a wall member separating the pressure regulation chamber and the collection chamber to define a pressure boundary therebetween and a one-way valve on said wall member to allow fluid communication therebetween.

Claim 22

The drainage device of claim 17 further including a suction pressure indicator associated with and adjacent to said pressure regulation chamber.

Claim 23

The drainage device of claim 19 further including an air leak meter associated with and adjacent to said intermediate chamber.

Claim 24

A drainage device comprising: at least two chambers, a pressure regulation chamber and a collection chamber, and a plurality of ports, wherein a drain line port is in fluid communication with the collection chamber; a suction pressure regulator valve that selectively controls the suction pressure, being developed within the pressure regulation chamber and being applied to the collection chamber, to a selected suction pressure level; wherein the pressure regulation chamber includes two compartments that are selectively interconnected to each other by means of the pressure regulation valve, where one of the ports, the atmospheric port, is in fluid communication with one compartment and another one of the ports, the suction line port, is in communication with the other of the regulation chamber compartments and a suction source; wherein the pressure regulation valve includes a mechanism for biasing the regulation valve in a first direction when the suction pressure of the suction source is less than the selected predetermined suction pressure level and for biasing the valve in a second direction when the suction pressure of the suction source exceeds the selected suction pressure; wherein the pressure regulation chamber and the collection chamber are in selective communication with each other by means of a one-way valve disposed on a wall member extending therebetween, where in one position the one-way valve isolates the regulation and collection chambers from each other so gas does not flow to the collection chamber and where, in another position, the one-way valve puts the chambers in communication with each other so suction pressure from the pressure regulation chamber is applied to the collection chamber to thereby cause the drainage of fluids from a body cavity; and wherein the pressure regulation chamber includes a suction pressure indicator associated therewith to provide an indication of the existence of suction pressure in the pressure regulation chamber and the collection chamber includes a negative pressure indicator associated therewith to provide an indication of the existence of negative pressure in the collection chamber.

Claim 25

A drainage device comprising: at least two chambers, a pressure regulation chamber and a collection chamber, and a plurality of ports, wherein a drain line port is in fluid communication with the collection chamber; a suction pressure regulator valve that selectively controls the suction pressure, being developed within the pressure regulation chamber and being applied to the collection chamber, to a selected suction pressure level; wherein the pressure regulation chamber includes two compartments that are selectively interconnected to each other by means of the pressure regulation valve, where one of the ports, the atmospheric port, is in fluid communication with one compartment and another one of the ports, the suction line port, is in communication with the other of the regulation chamber compartments and a suction source; wherein the pressure regulation valve includes a mechanism for biasing the regulation valve in a first direction when the suction pressure of the suction source is less than the selected predetermined suction pressure level and for biasing the valve in a second direction when the suction pressure of the suction source exceeds the selected suction pressure; wherein the pressure regulation chamber and the collection chamber are in selective communication with each other by means of a one-way valve disposed on a wall member extending therebetween, where in one position the one-way valve isolates the regulation and collection chambers from each other so gas does not flow to the collection chamber and where, in another position, the one-way valve puts the chambers in communication with each other so suction pressure from the pressure regulation chamber is applied to the collection chamber to thereby cause the drainage of fluids from a body cavity; and wherein the pressure regulation chamber includes a suction pressure indicator associated therewith to provide an indication of the existence of suction pressure in the pressure regulation chamber and the collection chamber includes a negative pressure indicator associated therewith to provide an indication of the existence of negative pressure in the collection chamber.

Claim 26

The drainage device of claim 21 further comprising an air leak meter chamber being coupled to the collection chamber and the one-way valve, the air leak chamber including a flow meter responsive to the gas flow from the collection chamber and providing an indication of a relative flow rate of the gas flowing from the collection chamber to the pressure regulation chamber.

Claim 27

The drainage device of claim 22 wherein the air flow meter includes a downwardly sloped member having a passage therethrough and a plurality of apertures communicating with the passage, wherein the downwardly sloped member cooperates with the apertures so gas from the collection chamber flows through successively lower apertures as the flow rate of the gas from the collection chamber increases.

Claim 28

The drainage device of claim 21 wherein the negative pressure indicator includes a message post encased by a flexible membrane, wherein the interior of the flexible membrane is coupled to the collection chamber so the flexible material collapses upon the message post and renders the message thereon visible.

Claim 29

The drainage device of claim 21 further comprising a drain port fluidly coupled to the collection chamber to drain fluid from the collection chamber.

Claim 30

The drainage device of claim 21 further including a bag assembly in fluid communication with the collection chamber and removably secured thereto to form an autotransfusion system.

Claim 31

A drainage device comprising: a housing having a plurality of surfaces; a plurality of chambers including a pressure regulation chamber, an intermediate chamber and a collection chamber therein and said pressure regulation chamber and said collection chamber are fluidly coupled by a vent pathway; a negative pressure indicator associated with the collection chamber to provide a visual indication of the existence of negative pressure within the collection chamber; and a wall member separating the pressure regulation chamber and the collection chamber to define a pressure boundary therebetween and a one-way valve on said wall member to allow fluid communication therebetween and wherein said negative pressure indicator is on the side of the pressure boundary adjacent to the collection chamber.

Claim 32

A drainage device comprising: a housing having a plurality of surfaces; a plurality of chambers including a pressure regulation chamber, an intermediate chamber and a collection chamber therein and said pressure regulation chamber and said collection chamber are fluidly coupled by a vent pathway; a negative pressure indicator associated with the collection chamber to provide a visual indication of the existence of negative pressure within the collection chamber; and a wall member separating the pressure regulation chamber and the collection chamber to define a pressure boundary therebetween and a one-way valve on said wall member to allow fluid communication therebetween and wherein said negative pressure indicator is on the side of the pressure boundary adjacent to the collection chamber.

Claim 33

The drainage device of claim 27 further including a suction status indicator associated with the pressure regulation chamber to provide a visual indication of the existence of suction pressure in the pressure regulation chamber and the suction pressure indicator is positioned on the side of the pressure boundary adjacent to the pressure regulation chamber.

Claim 34

The drainage device of claim 27 further including an air leak meter associated with the intermediate chamber to provide a visual indication of the existence of air flow in the intermediate chamber and the air leak meter is positioned on the side of the pressure boundary adjacent to the intermediate chamber.

Claim 35

A drainage device comprising: a housing having a plurality of wall surfaces; a plurality of chambers in said housing and including a suction pressure regulation chamber, an air leak meter chamber and a collection chamber, and a plurality of ports, wherein a drain line port is in fluid communication with the collection chamber and an atmospheric port and suction line port are in fluid communication with the suction pressure regulation chamber; a suction pressure regulator valve that selectively controls the suction pressure being developed within the suction pressure regulation chamber and being applied to the collection chamber at a selected suction pressure level; wherein the suction pressure regulator valve includes a manually adjustable mechanism for biasing the suction pressure regulator valve in a first direction when the suction pressure of the suction source is less than the selected suction pressure level and for biasing the suction pressure regulator valve in a second direction when the suction pressure of the suction source exceeds the selected suction pressure; wherein the suction pressure regulation chamber and the air leak meter chamber are in selective communication with each other by means of a one-way valve disposed on a wall member extending therebetween, where in one position the one-way valve isolates the suction pressure regulation chamber and air leak meter chamber from each other so gas does not flow from the suction pressure regulation chamber to the air leak meter chamber and where, in another position, the one-way valve puts the chambers in communication with each other so suction pressure from the suction pressure regulation chamber is applied to the air leak meter chamber and collection chamber to thereby cause the drainage of fluids from a body cavity; and wherein the suction pressure regulation chamber includes a suction pressure indicator associated therewith to provide an indication of the existence of suction pressure in the suction pressure regulation chamber and the collection chamber includes a negative pressure indicator associated therewith to provide an indication of the existence of negative pressure in the collection chamber.

Claim 36

A drainage device comprising: a housing having a plurality of wall surfaces; a plurality of chambers in said housing and including a suction pressure regulation chamber, an air leak meter chamber and a collection chamber, and a plurality of ports, wherein a drain line port is in fluid communication with the collection chamber and an atmospheric port and suction line port are in fluid communication with the suction pressure regulation chamber; a suction pressure regulator valve that selectively controls the suction pressure being developed within the suction pressure regulation chamber and being applied to the collection chamber at a selected suction pressure level; wherein the suction pressure regulator valve includes a manually adjustable mechanism for biasing the suction pressure regulator valve in a first direction when the suction pressure of the suction source is less than the selected suction pressure level and for biasing the suction pressure regulator valve in a second direction when the suction pressure of the suction source exceeds the selected suction pressure; wherein the suction pressure regulation chamber and the air leak meter chamber are in selective communication with each other by means of a one-way valve disposed on a wall member extending therebetween, where in one position the one-way valve isolates the suction pressure regulation chamber and air leak meter chamber from each other so gas does not flow from the suction pressure regulation chamber to the air leak meter chamber and where, in another position, the one-way valve puts the chambers in communication with each other so suction pressure from the suction pressure regulation chamber is applied to the air leak meter chamber and collection chamber to thereby cause the drainage of fluids from a body cavity; and wherein the suction pressure regulation chamber includes a suction pressure indicator associated therewith to provide an indication of the existence of suction pressure in the suction pressure regulation chamber and the collection chamber includes a negative pressure indicator associated therewith to provide an indication of the existence of negative pressure in the collection chamber.

Claim 37

The drainage device of claim 30 further comprising a negative pressure indicator window on a wall of the housing so the negative pressure indicator is visually observable through the wall of the housing in the presence of negative pressure conditions within the collection chamber.

Claim 38

The drainage device of claim 30 , further comprising a suction status window on a wall of the housing to allow for the visual observation of the suction status indicator therethrough in the presence of suction pressure in the suction pressure regulation chamber.

Claim 39

The drainage device of claim 30 wherein the negative pressure indicator is movable between first and second positions and further comprising a negative pressure indicator window on a wall of the housing so the negative pressure indicator is visually observable through the wall of the housing in a second position thereof to indicate the presence of negative pressure conditions within the collection chamber and wherein the negative pressure indicator is not visually observable therethrough in the first position thereof.

Claim 40

The drainage device of claim 33 wherein the negative pressure indicator includes a message post encased by a flexible membrane and the interior of the flexible membrane is in fluid communication with the collection chamber so the flexible material collapses upon the message post and renders the message thereon visible in the second position thereof.

Claim 41

The drainage device of claim 33 wherein the negative pressure indicator includes a message post encased by a flexible membrane and the interior of the flexible membrane is in fluid communication with the collection chamber so the flexible material is spaced apart from the message post in the first position thereof.

Claim 42

The drainage device of claim 30 wherein the suction status indicator is movable between first and second positions and further including a suction status indicator window on a wall of the housing so the suction status indicator is visually observable through the wall of the housing in a second position thereof to indicate the presence of suction conditions within the suction pressure regulation chamber.

Claim 43

The drainage device of claim 30 , wherein said one of said plurality of walls further includes an air leak window thereon to allow for the visual observation of at least a portion of the air leak chamber therethrough and the air leak chamber further includes a flow meter that is visually observable through the air leak window.

Claim 44

The drainage device of claim 37 wherein the flow meter includes a downwardly sloped member having a passage therethrough and a plurality of apertures communicating with the passage, wherein the downwardly sloped member cooperates with the apertures so gas from the collection chamber flows through successively lower apertures as the flow rate of the gas from the collection chamber increases.

Claim 45

A drainage device comprising: a housing having a plurality of wall surfaces; a plurality of chambers in said housing and including at least two chambers, a pressure regulation chamber and a collection chamber, being interconnected by a vent pathway fluidly extending therebetween; a suction status indicator associated with the pressure regulation chamber to provide an indication of the existence of suction pressure in the pressure regulation chamber and the suction status indicator is movable between first and second positions in response to the existence of suction pressure in the pressure regulation chamber; a negative pressure indicator associated with the collection chamber and the negative pressure indicator is movable between first and second positions in response to the existence of negative pressure in the collection chamber; wherein at least one of said plurality of walls on said housing includes an opaque region thereon; a suction status indicator window on said at least one of said plurality of walls to allow for the visual observation of the suction status indicator in the collection chamber through the suction status indicator window when the suction status indicator is in the second position to provide an indication of the existence of suction pressure in the pressure regulation chamber; and a negative pressure indicator window on said at least one of said plurality of walls to allow for the visual observation of the negative pressure indicator in the collection chamber through the negative pressure indicator window when the negative pressure indicator is in the second position to provide an indication of the existence of negative pressure in the collection chamber.

Claim 46

A drainage device comprising: a housing having a plurality of wall surfaces; a plurality of chambers in said housing and including at least two chambers, a pressure regulation chamber and a collection chamber, being interconnected by a vent pathway fluidly extending therebetween; a suction status indicator associated with the pressure regulation chamber to provide an indication of the existence of suction pressure in the pressure regulation chamber and the suction status indicator is movable between first and second positions in response to the existence of suction pressure in the pressure regulation chamber; a negative pressure indicator associated with the collection chamber and the negative pressure indicator is movable between first and second positions in response to the existence of negative pressure in the collection chamber; wherein at least one of said plurality of walls on said housing includes an opaque region thereon; a suction status indicator window on said at least one of said plurality of walls to allow for the visual observation of the suction status indicator in the collection chamber through the suction status indicator window when the suction status indicator is in the second position to provide an indication of the existence of suction pressure in the pressure regulation chamber; and a negative pressure indicator window on said at least one of said plurality of walls to allow for the visual observation of the negative pressure indicator in the collection chamber through the negative pressure indicator window when the negative pressure indicator is in the second position to provide an indication of the existence of negative pressure in the collection chamber.

Claim 47

The drainage device of claim 39 wherein the negative pressure indicator includes a message post encased by a flexible membrane and the interior of the flexible membrane is in fluid communication with the collection chamber so the flexible material collapses upon the message post and renders the message thereon visible in the second position thereof.

Claim 48

The drainage device of claim 39 wherein the suction status indicator includes a message post encased by a flexible membrane and the interior of the flexible membrane is in fluid communication with the pressure regulation chamber so the flexible material collapses upon the message post and renders the message thereon visible in the second position thereof.

Claim 49

The drainage device of claim 39 further including an air leak meter chamber disposed between the pressure regulation chamber and the collection chamber and wherein said one of said plurality of walls further includes an air leak window thereon to allow for the visual observation of at least a portion of the air leak chamber therethrough.

Claim 50

The drainage device of claim 39 wherein the pressure regulation chamber includes a suction pressure regulator valve that selectively controls the suction pressure being developed within the pressure regulation chamber and being applied to the collection chamber to a selected suction pressure level; wherein the pressure regulation chamber is in fluid communication with an atmospheric port that is in communication with the atmosphere and a suction line port that is in communication with a source of suction; and wherein the suction pressure regulator valve includes a manually adjustable mechanism for biasing the regulator valve in a first direction when the suction pressure of the suction source is less than the selected suction pressure level and for biasing the valve in a second direction when the suction pressure of the suction source exceeds the selected suction pressure level.