ARTIFICIAL VENTILATION APPARATUS

• US 20110209703A1
• Filed: 02/26/2011
• Published: 09/01/2011
• Est. Priority Date: 02/26/2010
• Status: Active Grant

• Current Assignee: Nihon Kohden Corporation
• Original Assignee: Nihon Kohden Corporation
• Inventors: NAGAI, Yasushi, KOBAYASHI, Naofumi, USUDA, Yutaka, YAMAMORI, Shinji
• Granted Patent: US 9,126,000 B2
• Time in Patent Office: Days
• US Class Current: 128/204.22
• CPC Class Codes: A61M 16/0051 with alarm devices
• CPC Class Codes: A61M 16/021 operated by electrical means A61M16/202 – A61M16/205 take precedence
• CPC Class Codes: A61M 16/0808 Condensation traps
• CPC Class Codes: A61M 16/085 Gas sampling
• CPC Class Codes: A61M 16/1055 bacterial
• CPC Class Codes: A61M 16/1065 in the expiratory path
• CPC Class Codes: A61M 16/107 in the inspiratory path
• CPC Class Codes: A61M 16/208 Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves
• CPC Class Codes: A61M 2016/0027 pressure meter
• CPC Class Codes: A61M 2205/502 User interfaces, e.g. screens or keyboards
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 2230/205 partial oxygen pressure (P-O2)
• CPC Class Codes: A61M 2230/30 Blood pressure A61M2230/04 takes precedence
• CPC Class Codes: A61M 2230/42 Rate
• CPC Class Codes: A61M 2230/432 partial CO2 pressure (P-CO2)
• CPC Class Codes: A61M 2230/50 Temperature

Abstract

An artificial ventilation apparatus includes: a connecting portion which is connected to a respiratory system of a patient; an inspiratory circuit which is a flow path for flowing a gas from a ventilator to the connecting portion; an expiratory circuit which is a flow path for guiding a gas exhausted from the connecting portion to an exhaust portion of the ventilator; an expiratory valve which blocks a flow of a gas from the exhaust portion toward the connecting portion; a carbon dioxide concentration sensor which is disposed in a circuit that is provided at a downstream side of the expiratory valve and which detects a carbon dioxide concentration; and an alarm outputting unit which outputs an alarm based on an output of the carbon dioxide concentration sensor.

Claims

1. An artificial ventilation apparatus comprising:

a connecting portion which is connected to a respiratory system of a patient;

an inspiratory circuit which is a flow path for flowing a gas from a ventilator to the connecting portion;

an expiratory circuit which is a flow path for guiding a gas exhausted from the connecting portion to an exhaust portion of the ventilator;

an expiratory valve which blocks a flow of a gas from the exhaust portion toward the connecting portion;

a carbon dioxide concentration sensor which is disposed in a circuit that is provided at a downstream side of the expiratory valve and which detects a carbon dioxide concentration; and

an alarm outputting unit which outputs an alarm based on an output of the carbon dioxide concentration sensor.

2. The artificial ventilation apparatus according to claim 1, further comprising a dedicated power supply portion which supplies an electric power to the carbon dioxide concentration sensor and the alarm outputting unit.

3. The artificial ventilation apparatus according to claim 1, wherein the carbon dioxide concentration sensor is disposed in an exhaust port of the exhaust portion.

4. The artificial ventilation apparatus according to claim 1, wherein the alarm outputting unit includes a state determining unit which obtains information, which includes at least one of apparatus information of the artificial ventilation apparatus and biological information of the patient, the state determining unit which, based on obtained information and the output of the carbon dioxide concentration sensor, determines whether a state, which includes at least one of an apparatus state of the artificial ventilation apparatus and a patient state of the patient, is abnormal or not.