Device for reducing dead space in a ventilator system

• US 6,761,166 B2
• Filed: 01/14/2003
• Issued: 07/13/2004
• Est. Priority Date: 01/17/2002
• Status: Expired due to Fees

• Current Assignee: Maquet Critical Care AB (Getinge AB)
• Original Assignee: Maquet Critical Care AB (Getinge AB)
• Inventors: Hallback, Magnus, Ahlmen, Christer
• Primary Examiner(s): Dawson, Glenn K.
• Assistant Examiner(s): Mendoza, Michael G.
• Application Number:
  US10/342,058
• Publication Number:
  US 20030131665A1
• Time in Patent Office: 546 Days
• Field of Search: 128/204.18, 128/204.19, 128/204.21, 128/204.22, 128/204.23, 128/204.26, 128/205.19, 128/205.24, 128/205.27, 128/207.12, 128/207.16
• US Class Current: 128/204.22
• CPC Class Codes: A61M 16/0009 with sub-atmospheric pressure, e.g. during expiration
• CPC Class Codes: A61M 16/0072 Tidal volume piston pumps

Abstract

A device for reducing dead space in a ventilator system has a first tube connectable to the dead space in the ventilator system for producing a flow path for the transport of gas from dead space in the ventilator system, a suction device connected to the first tube for generating an adjustable negative pressure in the first tube, a second tube connectable to dead space in the ventilator system, for producing a flow path for the transport of gas to dead space in the ventilator system, a pump connected to the second tube for generating an adjustable positive pressure in the second tube, and a control unit which regulates the suction device and the pump. The suction device and the pump are formed by a first chamber and a second chamber, respectively, in an enclosure, separated by a gas-tight, moving partition. The control unit regulates the moving partition to regulate the suction device and the pump for achieving simpler and more reliable operation.

Claims

1. A device for reducing dead space in a ventilator system, comprising:

a first tube adapted for connection to dead space in a ventilator system for producing a flow path for transport of gas from said dead space;

a suction unit connected to said first tube for generating an adjustable negative pressure in said first tube;

a second tube adapted for connection to said dead space for producing a flow path for transport of gas to said dead space;

a pump connected to said second tube for generating an adjustable positive pressure in said second tube;

said suction unit and said pump being formed respectively by a first chamber and a second chamber in an enclosure, said first and second chambers being separated by a gas-tight, movable partition; and

a control unit for regulating said suction unit and said pump by moving said partition.

2. A device as claimed in claim 1 further comprising an evacuation unit in fluid communication with said first chamber for evacuated gas, and a gas connector in fluid communication with said second chamber for gas replenishment.

3. A device as claimed in claim 2 wherein said evacuation unit is adapted for connection to said ventilator system.

4. A device as claimed in claim 2 wherein said gas connector is adapted for connection to said ventilator system.

5. A device as claimed in claim 1 wherein said control unit has a signal input adapted to receive signals from said ventilator system, and wherein said control unit regulates said suction unit and said pump dependent on said signals.

6. A device as claimed in claim 1 further comprising a manometer in fluid communication with one of said first tube and said first chamber and generating a manometer output supplied to said control unit, and wherein said control unit regulates said suction unit and said pump dependent on said manometer output.

7. A device as claimed in claim 1 further comprising a manometer in fluid communication with one of said second tube and said second chamber and generating a manometer output supplied to said control unit, and wherein said control unit regulates said suction unit and said pump dependent on said manometer output.

8. A device as claimed in claim 1 further comprising a first manometer in fluid communication with one of said first tube and said first chamber which generates a first manometer output, a second manometer in fluid communication with one of said second tube and said second chamber which generates a second manometer output, said first and second manometer outputs being supplied to said control unit, and wherein said control unit regulates said suction unit and said pump dependent on said first and second manometer outputs.

9. A device as claimed in claim 1 further comprising a manometer adapted for connection to said ventilator system adapted to determine a pressure in said dead space, said manometer generating a manometer output, and wherein said control unit regulates said suction unit and said pump dependent on said manometer.

10. A ventilator system as claimed in claim 1 further comprising a manometer adapted for connection to said ventilator system adapted to determine a pressure in said dead space, said manometer generating a manometer output, and wherein said control unit regulates said suction unit and said pump dependent on said manometer.

11. A ventilator system as claimed in claim 1 further comprising an evacuation unit in fluid communication with said first chamber for evacuated gas, and a gas connector in fluid communication with said second chamber for gas replenishment.

12. A ventilator system as claimed in claim 2 wherein said evacuation unit is adapted for connection to said ventilator system.

13. A ventilator system as claimed in claim 2 wherein said gas connector is adapted for connection to said ventilator system.

14. A ventilator system as claimed in claim 1 wherein said control unit has a signal input adapted to receive signals from said ventilator system, and wherein said control unit regulates said suction unit and said pump dependent on said signals.

15. A ventilator system as claimed in claim 1 further comprising a manometer in fluid communication with one of said first tube and said first chamber and generating a manometer output supplied to said control unit, and wherein said control unit regulates said suction unit and said pump dependent on said manometer output.

16. A ventilator system as claimed in claim 1 further comprising a manometer in fluid communication with one of said second tube and said second chamber and generating a manometer output supplied to said control unit, and wherein said control unit regulates said suction unit and said pump dependent on said manometer output.

17. A ventilator system as claimed in claim 1 further comprising a first manometer in fluid communication with one of said first tube and said first chamber which generates a first manometer output, a second manometer in fluid communication with one of said second tube and said second chamber which generates a second manometer output, said first and second manometer outputs being supplied to said control unit, and wherein said control unit regulates said suction unit and said pump dependent on said first and second manometer outputs.

18. A ventilator system, comprising:

a first tube adapted for connection to dead space in a ventilator system for producing a flow path for transport of gas from said dead space;

a suction unit connected to said first tube for generating an adjustable negative pressure in said first tube;

a second tube adapted for connection to said dead space for producing a flow path for transported gas to said dead space;

a pump connected to said second tube for generating an adjustable positive pressure in said second tube;

said suction unit and said pump being formed respectively by a first chamber and a second chamber in an enclosure, said first and second chambers being separated by a gas-tight, movable partition; and

a control unit for regulating said suction unit and said pump by moving said partition.