High-frequency oscillation artificial respiration apparatus

• US 6,557,554 B1
• Filed: 10/18/2000
• Issued: 05/06/2003
• Est. Priority Date: 10/29/1999
• Status: Expired due to Fees

• Current Assignee: Suzuki Motor Corporation
• Original Assignee: Suzuki Motor Corporation
• Inventors: Sugiura, Yasuhito
• Primary Examiner(s): Lo, Weilun
• Assistant Examiner(s): PATEL, MITAL B
• Application Number:
  US09/690,848
• Time in Patent Office: 930 Days
• Field of Search: 128/204.18, 128/204.21, 128/204.24, 128/204.25
• US Class Current: 128/204.18
• CPC Class Codes: A61M 16/0096 High frequency jet ventilation
• CPC Class Codes: A61M 16/04 Tracheal tubes catheters in general A61M25/00
• CPC Class Codes: A61M 16/0833 T- or Y-type connectors, e.g. Y-piece
• CPC Class Codes: A61M 2016/0027 pressure meter

Abstract

The present invention provides a high-frequency oscillation artificial respiration apparatus that includes an inhale gas introducer that supplies an inhale gas containing oxygen to a patient and a patient side path that guides the inhale gas from the inhale gas introducer into the patient. An oscillating air pressure provider that applies an oscillating air pressure having a higher frequency than a respiration frequency of the patient, to the inhale gas flowing through the patient side path, an exhaust path that exhausts an exhale gas containing carbon dioxide exhaled from the patient, into the atmosphere, and an auxiliary inhale gas supply are also provided. The patient side path includes a branching pipe that branches a flow from the inhale gas introducer to the exhaust path side and the patient side and an intrachea insert tube that is connected to the patient side end of the branching pipe can be inserted through a mouth into the trachea of the patient.

Claims

1. A high-frequency oscillation artificial respiration apparatus comprising:

an inhale gas introducer that supplies an inhale gas containing oxygen to a patient,

a patient side path that guides the inhale gas from the inhale gas introducer into the patient,

an oscillating air pressure provider that applies an oscillating air pressure, having a higher frequency than a respiration frequency of the patient, to the inhale gas flowing through the patient side path, and

an exhaust path that exhausts an exhale gas containing carbon dioxide exhaled from the patient, into the atmosphere,

wherein the patient side path comprises a branching pipe that branches a flow from the inhale gas introducer to the exhaust path side and the patient side and an in-trachea insert tube which is connected to the patient side end of the branching pipe and can be inserted through a mouth into the trachea of the patient,

the apparatus further comprising an auxiliary inhale gas supply that supplies an inhale gas to the vicinity of the lungs of the patient through a path different from the patient side path,

the auxiliary inhale gas supply including an inhale gas supply including an inhale gas supply source and an auxiliary inhale gas supply path, which is different from the patient side path, that guides the inhale gas from the supply source into the lungs of the patient.

2. A high-frequency oscillation artificial respiration apparatus as claimed in claim 1, wherein the inhale gas supply source of the auxiliary inhale gas supply is shared by the inhale gas introducer, and

the auxiliary inhale gas supply path, which is different from the patient side path, guides the inhale gas generated in the inhale gas introducer, into the lungs of the patient.

3. A high-frequency oscillation artificial respiration apparatus as claimed in claim 1, wherein the auxiliary inhale gas supply comprises an auxiliary supply insert tube which is connected to the patient side end of the auxiliary inhale gas supply path and can be inserted into the trachea of the patient.

4. A high-frequency oscillation artificial respiration apparatus as claimed in claim 3, wherein the auxiliary supply insert tube and the in-trachea insert tube are formed as a unitary device having a configuration that prevents mixing the gases contained in each of the tubes.

5. A high-frequency oscillation artificial respiration apparatus as claimed in claim 1, wherein the auxiliary inhale gas supply comprises an intermittent inhale gas supply unit that regulates an inhale gas flow in the auxiliary inhale gas supply path at a constant repeat cycle.

6. A high-frequency oscillation artificial respiration apparatus as claimed in claim 1, wherein the auxiliary inhale gas supply comprises an auxiliary path humidifying device that humidifies the inhale gas flowing in the auxiliary inhale gas supply path.

7. A high-frequency oscillation artificial respiration apparatus as claimed in claim 1, wherein the auxiliary inhale gas supply includes a chemical liquid supply unit that supplies a chemical liquid into the auxiliary inhale gas supply path.

8. A high-frequency oscillation artificial respiration apparatus as claimed in claim 1, the apparatus further comprising:

a first regulator that regulates an oxygen concentration and a flow rate of the inhale gas flowing through the patient side path, and

a second regulator that regulates an oxygen concentration and a flow rate of the inhale gas flowing through the auxiliary inhale gas supply path.

9. A high-frequency oscillation artificial respiration apparatus as claimed in claim 8, the apparatus further comprising:

a pressure sensor that detects a pressure in the vicinity of the lungs of the patient, and

a first flow rate controller that controls, according to an output from the pressure sensor, the first regulator to adjust the flow rate of the inhale gas flowing in the patient side path.

10. A high-frequency oscillation artificial respiration apparatus as claimed in claim 8, the apparatus further comprising:

a pressure sensor that detects a pressure in the vicinity of the lungs of the patient, and

a second flow rate controller that controls, according to an output from the pressure sensor, the second regulator to adjust the flow rate of the inhale gas flowing in the auxiliary inhale gas supply path.

11. A high-frequency oscillation artificial respiration apparatus as claimed in claim 1, the apparatus further comprising:

a flow rate regulating valve provided in the exhaust path for regulating a flow rate of the exhale gas,

a pressure sensor that detects a pressure in the vicinity of the lungs of the patient, and

a valve controller that controls, according to an output from the pressure sensor, an opening amount of the flow rate regulating valve.

12. A high-frequency oscillation (HFO) artificial respiration apparatus comprising:

an inhale gas introducer that supplies an inhale gas containing oxygen to a patient;

a patient side path that guides the inhale gas from the inhale gas introducer to the patient;

an oscillating air pressure provider that provides the inhale gas flowing in the patient side path with an oscillating air pressure having a cycle shorter than a respiration cycle of the patient, the oscillating air pressure provider comprising a diaphragm mechanism including a film member that provides an oscillating air pressure to an inhale gas;

an exhaust path that exhausts into the atmosphere an exhale gas containing carbon dioxide exhaled from the patient; and

a controller that controls operation of the oscillating air pressure provider,

wherein the oscillating air pressure provider regulates a ventilation amount per oscillation cycle and an oscillating frequency of the oscillating air pressure,

the controller includes an entry device that accepts the oscillation frequency entered, and an operation controller that controls the oscillating air pressure provider to supply an output oscillating air pressure set to the oscillation frequency entered, and

the operation controller has a ventilation state maintaining function that modifies the oscillation frequency according to an entered value, the oscillation controller modifying a ventilation amount per oscillation cycle and an oscillation frequency of the oscillating air pressure such that a value of V_T²•

f is maintained constant, where V_T represents a ventilation amount per oscillation cycle for lungs of the patient and f represents an oscillation frequency.

13. A high-frequency oscillation artificial respiration apparatus as claimed in claim 12, wherein the entry device also enters a ventilation amount for lungs of the patient, and

the operation controller controls the oscillating air pressure provider to be set at the ventilation amount entered.

14. A high-frequency oscillation artificial respiration apparatus as claimed in claim 12, wherein

the patient side path is provided with an inner pressure regulator that regulates an average inner pressure of the patient side path,

the entry device accepts an input of an average inner pressure, and

the operation controller controls the inner pressure regulator according to the average inner pressure entered.

15. A high-frequency oscillation artificial respiration apparatus a claimed in claim 12, wherein

the entry device accepts inputs of an anatomical dead amount V_D and a constant K of lungs of the patient,

the controller includes a calculator that calculates an alveolar ventilation amount V_A defined by equation V_A=K•

V_T²•

V_D, and

the controller is provided with a display that displays the alveolar ventilation amount V_A calculated.