Search International and National Patent Collections
Some content of this application is unavailable at the moment.
If this situation persists, please contact us atFeedback&Contact
1. (WO1991006342) CONTINUOUS FLOW AUGMENTATION OF VENTILATION
Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

WE CLAIM:

1. A system for the transtracheal augmentation of ventilation and removal of C02 from a patient, said system comprising:
means for providing an oxygen/air mixture of at least 21 percent oxygen,
means connected to said providing means for selectively controlling the flow of said oxygen/air mixture at a constant flow in a flow range of 8 to 20 liters per minute,
means connected to said controlling means for regulating the back pressure of said oxygen/air mixture in a back pressure range of 2 to 25 psi,
means connected to said regulating means for maintaining the humidity of said oxygen/air mixture in a humidity range of 80 to 100 percent, said maintaining means being further capable of maintaining the temperature of said oxygen/air mixture in a temperature range of 35 to 38 degrees C. ,
a transtracheal catheter connected to said maintaining means for continuously delivering said oxygen/air mixture into the trachea of said patient.

2. The system of Claim 1 wherein said providing means comprises:
means for storing liquid oxygen,
an air compressor for compressing air, and
means connected to said storing means and to said air compressor for adjustably blending said oxygen from said storing means with air from said air compressor to form said oxygen/air mixture.

3. The system of Claim 1 wherein said providing means comprises:
a concentrator for generating oxygen, an air compressor for compressing air, and
means connected to sid generating means and to said air compressor for adjustably blending said oxygen from said generating means with air from said air compressor to form said oxygen/air mixture.

4. The system of Claim 1 wherein said providing means is an enricher.

5. The system of Claim 1 wherein said controlling means is a flow meter.

6. The system of Claim 1 wherein said regulating means is a pop-off valve.

7. The system of Claim 1 wherein said maintaining means comprises:
a humidifier,
a tube having one end connected to said humidifier for carrying said oxygen/air mixture, a heated wire in said tube for heating said oxygen/air mixture,
a temperature probe at the other end of said tube for measuring the temperature of said oxygen/air mixture as it leaves said tube, and
means connected to said heated wire and to said temperature probe for adjustably setting the temperature of said oxygen/air mixture in said temperature range.

8. The system of Claim 1 wherein said transtracheal catheter comprises a catheter having an outside diameter of less than 3.5 millimeters.

9. The system of Claim 1 wherein said transtracheal catheter comprises a catheter having an inside diameter of 1.7 to 3.0 millimeters.

10. The system of Claim 1 wherein said transtracheal catheter uses a high tech biopolymer having a durometer of 70-90 Shore A.

11. A system for the transtracheal augmentation of ventilation and removal of C02 from a patient, said system comprising:
means for providing an oxygen/air mixture having a predetermined amount of oxygen,
means connected to said providing means for selectively controlling the flow of said oxygen/air mixture at a constant flow value of at least 8 liters per minute,
means connected to said controlling means for regulating the back pressure of said oxygen/air mixture at a preselected back pressure, means connected to said regulating means for maintaining constant humidity and temperature values for said oxygen/air mixture, and a transtracheal catheter connected to said maintaining means for continuously delivering said oxygen/air mixture into the trachea of said patient.

12. The system of Claim 11 wherein said providing means comprises:
means for storing liquid oxygen,
an air compressor for compressing air, and
means connected to said storing means and to said air compressor for adjustably blending said oxygen from said storing means with air from said air compressor to form said oxygen/air mixture, and
having at least 21 percent oxygen.

13. The system of Claim 11 wherein said providing means comprises:
a concentrator for generating oxygen, an air compressor for compressing air, and
means connected to said concentration and to said air compressor for adjustably blending said oxygen from said concentrated with air from said air compressor to form said oxygen/air mixture, and
having at least 21 percent oxygen.

14. The system of Claim 11 wherein said providing means is an enricher, and
delivering an oxygen/air mixture having at least 21 percent oxygen.

15. The system of Claim 11 wherein said controlling means is a flow meter, and
operating in a flow range of 8 to 20 liters per minute.

16. The system of Claim 11 wherein said regulating means is a pop-off valve, and
operating in a back pressure range of 2 to 25 psi.

17. The system of Claim 11 wherein said maintaining means comprises:
a humidifier,
a tube having one end connected to said humidifier for carrying said oxygen/air mixture and the other end connected to said transtracheal catheter,
a heated wire in said tube for heating said oxygen/air mixture,
a temperature probe at the other end of said tube for measuring the temperature of said oxygen/air mixture as it leaves said tube, and
means connected to said heated wire and to said temperature probe for adjustably setting the temperature of said oxygen/air mixture to said temperature valve.

18. A system for the transtracheal augmentation and removal of C02 from a patient, said system comprising:
means for providing an oxygen/air mixture having a predetermined percentage of oxygen at constant humidity and temperature,
a transtracheal catheter,
means operative with said providing means and connected to said transtracheal catheter for continuously delivering said oxygen/air mixture through said transtracheal catheter at a constant flow rate of at least 8 liters per minute at a preselected back pressure into the lungs of a patient.

19. A ventilation augmentation and C02 removal method using a transtracheal catheter in a patient, said method comprising the steps of:
providing an oxygen/air mixture, said oxygen/air mixture having at least 21 percent oxygen, a humidity range of 80 to 100 percent, and a temperature range of 35 to 38 degrees C. , and
continuously delivering the oxygen/air mixture through the transtracheal catheter at a constant flow rate of 8 to 20 liters per minute at a back pressure of 2 to 25 psi into the lungs of the patient.

20. A method for the transtracheal augmentation of ventilation and removal of C02 from a patient, said method comprising the steps of:
providing an oxygen/air mixture having a predetermined amount of oxygen,
selectively controlling the flow of said oxygen/air mixture at a constant flow value, regulating the back pressure of said oxygen/air mixture at a preselected back pressure, maintaining constant humidity and temperature values for said oxygen/air mixture, and continuously delivering said oxygen/air mixture into the trachea of said patient with the constant flow value of the delivered oxygen/air mixture being at a value which augments ventilation of the patient by maintaining the patient's blood oxygen at a desired level, maintains alveolar ventilation through removal of C02 at a desired level, and allows the respiratory muscles of the patient to relax while allowing the patient to spontaneously breathe at any time.

21. A method for the transtracheal augmentation of ventilation and removal of C02 from a patient, said method comprising the steps of:
providing an oxygen/air mixture of at least 21 percent oxygen,
selectively controlling the flow of said oxygen/air mixture at a constant flow in a flow range of 8 to 20 liters per minute,
regulating the back pressure of said oxygen/air mixture in a back pressure range of 2 to

25 psi,
maintaining the humidity of said oxygen/air mixture in a humidity range of 80 to 100 percent,
maintaining the temperature of said oxygen/air mixture in a temperature range of 35 to 38 degrees C. ,
continuously delivering said oxygen/air mixture into the trachea of said patient, the constant flow value of the delivered oxygen/air mixture being at a value which augments ventilation of the patient by maintaining the patient's blood oxygen at a desired level, maintains alveolar ventilation through removal of C02 at a desired level, and allows the respiratory muscles of the patient to relax while allowing the patient to spontaneously breathe at any time.

22. A system for augmenting ventilation of a patient, said system comprising:
a transtracheal catheter inserted through the trachea of said patient,
means for providing an oxygen/air mixture,
means connected to said providing means and to said transtracheal catheter for continuously delivering said oxygen/air mixture into said transtracheal catheter at a predetermined constant high flow rate, said predetermined constant high flow rate being at a value which augments ventilation of said patient, maintains alveolar ventilation through removal of C02 from the lungs of said patient and allows the respiratory muscles of said patient to relax while allowing said patient to spontaneously breathe at any time.

23. The system of Claim 22 wherein said delivering means controls the humidity and temperature in preselected ranges prior to said delivery of said oxygen/air mixture to said transtracheal catheter.

24. The system of Claim 22 wherein said predetermined constant flow rate is at least 8 1iters/minute.

25. The system of Claim 22 wherein the ratio of oxygen to air in said oxygen/air mixture is a value in the range of 0.21 to 1.00 which maintains said patient's blood oxygen at a desired level.