Chest drainage system with visual float means

Claim 2

Apparatus for collection of a fluid comprising: a collection container, means carried by said collection container defining a first passage providing for communication between said collection container and a source of fluid to be collected external to said apparatus, a transparent seal container for containing a fluid, means defining a second passage between said collection container and said seal container providing for communication therebetween, means carried by said seal container providing for a fluid seal in said second passage, said fluid seal means including a tube in communication with said second passage and having a lower end adapted to be disposed below the level of fluid in said seal container, and a float disposed within said tube for increasing the visual perception of the rise and fall of the fluid within the tube, said float having a plurality of ribs thereon for spacing the float from the inner walls of said tube, a suction control container for containing a fluid, means defining a third passage between said suction control container and said seal container providing for communication therebetween, means coupled to one of said suction control container and said seal container defining a fourth passage providing for communication between said one container and a source of vacuum pressure, and means carried by said suction control container for controlling the negative pressure within said containers when vacuum pressure is applied to said one container including means for communicating atmospheric air external to said apparatus into said suction control container in response to a negative pressure within said suction control container greater than a predetermined negative pressure.

Claim 3

Apparatus according to claim 1 wherein said float includes a plurality of shoulders projecting diametrically therefrom for engaging the lower end of said tube, for preventing movement of said float upwardly within said tube beyond a predetermined elevation and for providing an audible sound indicating correct system operation.

Claim 4

Apparatus according to claim 1 wherein said float is hollow.

Claim 5

Apparatus for collection of a fluid comprising: a collection container, means carried by said collection container defining a first passage providing for communication between said collection chamber and a source of fluid to be collected external to said apparatus, a seal container containing a fluid, means defining a second passage between said collection container and said seal container providing for communication therebetween, means carried by said seal container providing for a fluid seal in said second passage, a suction control container for containing a fluid, means defining a third passage between said suction control container and said seal container providing for communication therebetween, means coupled to one of said suction control container and said seal container defining a fourth passage providing for communication between said one container and a source of vacuum pressure, means carried by said apparatus for controlling the negative pressure within said containers when vacuum pressure is applied to said one container including a manometer tube having its lower end below the level of fluid in the suction control container for communicating atmospheric air external to said apparatus into said suction control container in response to a negative pressure within said suction control container greater than a predetermined negative pressure, and a porous member disposed about said tube and about the walls of said suction control container at an elevation slightly above the level of fluid in the suction control container for preventing entrainment of fluid in the air flowing into the apparatus.

Claim 6

Apparatus for collection of a fluid comprising: a collection container, means carried by said collection container defining a first passage providing for communication between said collection chamber and a source of fluid to be collected external to said apparatus, a seal container containing a fluid, means defining a second passage between said collection container and said seal container providing for communication therebetween, means carried by said seal container providing for a fluid seal in said second passage, a suction control container for containing a fluid, means defining a third passage between said suction control container and said seal container providing for communication therebetween, means coupled to one of said suction control container and said seal container defining a fourth passage providing for communication between said one container and a source of vacuum pressure, means carried by said apparatus for controlling the negative pressure within said containers when vacuum pressure is applied to said one container including a manometer tube having its lower end below the level of fluid in the suction control container for communicating atmospheric air external to said apparatus into said suction control container in response to a negative pressure within said suction control container greater than a predetermined negative pressure, and a porous member disposed about said tube and about the walls of said suction control container at an elevation slightly above the level of fluid in the suction control container for preventing entrainment of fluid in the air flowing into the apparatus.

Claim 7

Apparatus according to claim 4 wherein said member is comprised of an open cellular plastic foam.

Claim 8

Apparatus according to claim 4 wherein said member has an opening therethrough enabling entry of a tube into the fluid in the suction control container.

Claim 9

Apparatus according to claim 4 wherein said fluid seal means defines a first pressure head when the pressure in said collection container is sufficiently less than the pressure in said seal container to break said fluid seal and enable open communication through said second passage between said seal container and said collection container, wherein said negative pressure control means defines a second pressure head and a fifth passage for communicating atmospheric air external to said apparatus into said suction control container in response to a negative pressure within said suction control container more negative than said second predetermined pressure head, and valve means operationally connected with said fourth passage for closing said fourth passage and placing said first and second pressure heads in series one with the other such that a negative pressure substantially equal to the pressure of the combined pressure heads obtains in said collection apparatus before atmospheric air can communicate into said suction control container through said fifth passage, said closing means being responsive to sensing a pressure substantially about atmospheric pressure.

Claim 10

Apparatus according to claim 7 including a check valve in said suction control container for relieving pressure in said container in excess of about atmospheric pressure.

Claim 11

Apparatus according to claim 4 including a check valve in said suction control container for relieving pressure in said container in excess of about atmospheric pressure.

Claim 12

Apparatus for collection of a fluid comprising: a collection container, means carried by said collection container defining a first passage providing for communication between said collection container and a source of fluid to be collected external to said apparatus, a transparent seal container containing a fluid, means defining a second passage between said collection container and said seal container providing for communication therebetween, means carried by said seal container providing for a fluid seal in said second passage, said fluid seal means including a tube in communication with second passage and having a lower end disposed below the level of fluid in said seal container, and a float disposed within said tube for increasing the visual perception of the rise and fall of the fluid within the tube, a suction control container for containing a fluid, means defining a third passage between said suction control container and said seal container providing for communication therebetween, means coupled to one of said suction control container and said seal container defining a fourth passage providing for communication between said one container and a source of vacuum pressure, and means carried by said suction control container for controlling the negative pressure within said containers when vacuum pressure is applied to said one container including means for communicating atmospheric air external to said apparatus into said suction control container in response to a negative pressure within said suction control container greater than a predetermined negative pressure, said negative pressure control means including a manometer tube disposed in said suction control container with its lower end at an elevation below the level of fluid in the suction control container, and a porous member disposed about said tube and about the walls of said suction control container at an elevation slightly above the level of fluid in the suction control container for preventing entrainment of the fluid in the air flowing into the apparatus.

Claim 13

Apparatus for collection of a fluid comprising: a collection container, means carried by said collection container defining a first passage providing for communication between said collection container and a source of fluid to be collected external to said apparatus, a transparent seal container containing a fluid, means defining a second passage between said collection container and said seal container providing for communication therebetween, means carried by said seal container providing for a fluid seal in said second passage, said fluid seal means including a tube in communication with second passage and having a lower end disposed below the level of fluid in said seal container, and a float disposed within said tube for increasing the visual perception of the rise and fall of the fluid within the tube, a suction control container for containing a fluid, means defining a third passage between said suction control container and said seal container providing for communication therebetween, means coupled to one of said suction control container and said seal container defining a fourth passage providing for communication between said one container and a source of vacuum pressure, and means carried by said suction control container for controlling the negative pressure within said containers when vacuum pressure is applied to said one container including means for communicating atmospheric air external to said apparatus into said suction control container in response to a negative pressure within said suction control container greater than a predetermined negative pressure, said negative pressure control means including a manometer tube disposed in said suction control container with its lower end at an elevation below the level of fluid in the suction control container, and a porous member disposed about said tube and about the walls of said suction control container at an elevation slightly above the level of fluid in the suction control container for preventing entrainment of the fluid in the air flowing into the apparatus.

Claim 14

Apparatus according to claim 10 wherein said member is comprised of an open cellular plastic foam.

Claim 15

Apparatus according to claim 11 wherein said member has an opening therethrough enabling entry of a tube into the fluid in the suction control container.

Claim 16

Apparatus according to claim 10 wherein said fluid seal means defines a first pressure head when the pressure in said collection container is sufficiently less than the pressure in said seal container to break said fluid seal and enable open communication through said second passage between said seal container and said collection container, wherein said negative pressure control means defines a second pressure head and a fifth passage for communicating atmospheric air external to said apparatus into said suction control container in response to a negative pressure within said suction control container more negative than said second predetermined pressure head, and valve means operationally connected with said fourth passage for closing said fourth passage and placing said first and second pressure heads in series one with the other such that a negative pressure substantially equal to the pressure of the combined pressure heads obtains in said collection apparatus before atmospheric air can communicate into said suction control container through said fifth passage, said closing means being responsive to sensing a pressure substantially about atmospheric pressure.

Claim 17

Apparatus according to claim 13 including a check valve in said suction control container for relieving pressure in said container in excess of about atmospheric pressure.

Claim 18

Apparatus according to claim 10 including a check valve in said suction control container for relieving pressure in said container in excess of about atmospheric pressure.