Ventilator triggering device

• US 6,230,708 B1
• Filed: 10/30/1998
• Issued: 05/15/2001
• Est. Priority Date: 10/30/1998
• Status: Expired due to Fees

• Current Assignee: Sechrist Industries, Inc. (Healogics LLC)
• Original Assignee: Sechrist Industries, Inc. (Healogics LLC)
• Inventors: Radko, John
• Primary Examiner(s): Dawson, Glenn K.
• Application Number:
  US09/183,761
• Time in Patent Office: 928 Days
• Field of Search: 128/204.18, 128/204.26, 128/205.24, 128/207.14, 128/207.16, 128/200.24
• US Class Current: 128/205.24
• CPC Class Codes: A61M 16/00 Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes stimulating the respiratory movement by mechanical, pneumatic or electrical means, iron lungs combined with gas breathing means A61H31/00
• CPC Class Codes: A61M 16/024 including calculation means, e.g. using a processor
• CPC Class Codes: A61M 16/0858 Pressure sampling ports
• CPC Class Codes: A61M 16/206 Capsule valves, e.g. mushroom, membrane valves
• CPC Class Codes: A61M 16/208 Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves
• CPC Class Codes: A61M 2016/0021 with a proportional output signal, e.g. from a thermistor
• CPC Class Codes: A61M 2016/0027 pressure meter

Abstract

An improved device for providing a patient triggered breath to a patient including a ventilator having one tube that supplies a flow of a gas and another tube that delivers gas to an exhalation valve, an endo-tracheal tube that is in communication with the lungs of the patient, and a connector for connecting the supply tube from the ventilator to the endo-trachael tube. The connector has a chamber and a two-way check valve, the two-way check valve having an inhalation check valve and an exhalation check valve. The wall of the connector may further include an opening for connection to a pressure transducer. The volume of the chamber of the connector is between about 1.0 cm³ to 1.3 cm³ and the exhalation valve is selectively moved from its opened position to its closed position when the pressure transducer senses a reduction in pressure within the chamber of between about 0.25 cm of water and 2.0 cm of water and wherein the exhalation valve is moved from its closed position to it opened position after a predetermined amount of time.

Claims

1. A connector for connecting a ventilator to a patient, the connector comprising:

a chamber; and

a two-way check valve, the two-way check valve having an inhalation check valve and an exhalation check valve wherein the volume of the chamber is between about 1.0 cm³ to 1.3 cm³.

2. The connector of claim 1, wherein the inhalation check valve has a cracking pressure of between about 2 to 2.5 cm of water.

3. The connector of claim 1, wherein the exhalation check valve has a cracking pressure of between about 2 to 2.5 cm of water.

4. The connector of claim 1, wherein the exhalation check valve comprises a flap having a ring shaped-portion and a flap portion.

5. A ventilator trigger device for detecting the initiation of a patient effort breath comprising:

a chamber having a volume of between about 1.0 cm³ to 1.3 cm³;

a two-way check valve, the two-way check valve having an inhalation check valve and an exhalation check valve, the cracking pressure of the inhalation check valve being between about 2 to 2.5 cm of water and the cracking pressure of the exhalation check valve being between about 2 to 2.5 cm of water.

6. The ventilator trigger device of claim 5, further including an opening for connection to a pressure transducer.

7. The ventilator trigger device of claim 5, wherein the inhalation check valve comprises a plug having an opening and a spring.

8. The ventilator trigger device of claim 5, wherein the exhalation check valve comprises a flap having a ring shaped-portion and a flap portion.

9. A device for providing a patient triggered breath to a patient'"'"'s lungs comprising:

a ventilator having at least one tube that supplies a flow of a gas;

an endo-tracheal tube that is adapted to be in communication with the lungs of the patient;

an exhalation valve;

at least one exhalation tube that is adapted to deliver gas from the patient'"'"'s lungs to the exhalation valve;

a connector for connecting the supply tube from the ventilator to the endo-tracheal tube, the connector having a chamber, and having a two-way check valve, the two-way check valve having an inhalation check valve and an exhalation check valve.

10. The device of claim 9, wherein the chamber is defined by at least one wall and wherein said at least one wall further includes an opening for connection to a pressure transducer.

11. The device of claim 10, further including a pressure transducer, wherein the pressure transducer senses changes in pressure within the chamber of the connector.

12. The device of claim 11, wherein the exhalation valve is selectively movable from a closed position to an opened position, and vice versa, and wherein the exhalation valve is moved from its opened position to its closed position when the pressure transducer senses a reduction in pressure within the chamber of between about 0.25 cm of water and 2.0 cm of water and wherein the exhalation valve is moved from its closed position to its opened position after a predetermined amount of time.

13. The device of claim 9, wherein the volume of the chamber of the connector is between about 1.0 cm³ to 1.3 cm³.

14. The device of claim 9, wherein the inhalation check valve has a cracking pressure of between about 2 to 2.5 cm of water.

15. The device of claim 9, wherein the exhalation check valve has a cracking pressure of between about 2 to 2.5 cm of water.

16. The device of claim 9, wherein the inhalation check valve comprises a plug having an opening and a spring.

17. The device of claim 9, wherein the exhalation check valve comprises a flap having a ring shaped-portion and a flap portion.

18. A method for providing a patient with a patient triggered breath from a ventilator comprising:

(1) providing a ventilator having one tube that supplies a flow of a gas and another tube that delivers gas to an open exhalation valve;

(2) providing an endo-tracheal tube that is in communication with the lungs of the patient;

(3) providing a connector for connecting the supply tube from the ventilator to the endo-trachael tube, the connector having a chamber, and having a two-way check valve, the two-way check valve having an inhalation check valve and an exhalation check valve, the exhalation and inhalation check valves being closed prior to the patient initiating a patient effort breath;

(4) sensing a pressure change within the chamber of the connector with a pressure transducer of between about 0.25 cm of water and 2.0 cm of water at the initiation of a patient effort breath;

(5) closing the exhalation valve, thereby causing the inhalation valve to open, thereby causing the gas flowing from the ventilator to enter the endo-tracheal tube;

(6) waiting a predetermined time;

(7) re-opening the exhalation valve after the predetermined time, thereby permitting the gas flowing from the ventilator to be exhausted through the exhalation valve;

(8) waiting as the patient exhales the gas within their lungs, thereby causing the exhalation check valve to open and exhaust the exhaled gases through the opened exhalation valve;

(9) repeating steps 4 through 8.