Ventilating apparatus and method enabling a patient to talk with or without a trachostomy tube check valve

• US 7,997,272 B2
• Filed: 09/11/2006
• Issued: 08/16/2011
• Est. Priority Date: 09/11/2006
• Status: Active Grant

• Current Assignee: Philips RS North America LLC (Koninklijke Philips N.V.)
• Original Assignee: RIC INVESTMENTS LLC (Koninklijke Philips N.V.)
• Inventors: Isaza, Fernando
• Primary Examiner(s): Yu; Justine R
• Assistant Examiner(s): CHU, KAI-YEU K
• Application Number:
  US11/518,816
• Publication Number:
  US 20080060646A1
• Time in Patent Office: 1,800 Days
• Field of Search: 128/204.21, 128/204.18, 128/205.24, 12820714- 16, 128/207.15, 128/207.16
• US Class Current: 128/205.24
• CPC Class Codes: A61M 16/042 with separate conduits for in-and expiration gas, e.g. for limited dead volume
• CPC Class Codes: A61M 16/0468 with valves at the proximal end limiting exhalation, e.g. during speaking or coughing air passages from trachea to oesophagus or to pharynx, artificial epiglottis A61F2/203
• CPC Class Codes: A61M 16/0833 T- or Y-type connectors, e.g. Y-piece
• CPC Class Codes: A61M 16/204 used for inhalation control
• CPC Class Codes: A61M 16/205 used for exhalation control
• CPC Class Codes: A61M 2016/0021 with a proportional output signal, e.g. from a thermistor
• CPC Class Codes: A61M 2016/0027 pressure meter
• CPC Class Codes: A61M 2039/1005 Detection of disconnection
• CPC Class Codes: A61M 2202/0208 Oxygen

Abstract

A method of operating a ventilator assembly having inhalation and exhalation passages communicating with one another, and a respiration assembly that can perform repetitive respiratory cycles. The method includes (a) connecting the conduit with an open end of an endotracheal tube positioned within the trachea so that the open end leads into the airway below the vocal cords, (b) repetitively cycling the respiration assembly so that during the inhalation phase, gas in the inhalation passage flows through the endotracheal tube and into the airway, and during the exhalation phase, an exhalation valve is maintained relatively closed and the exhaled gases flow pass the vocal cords and out of the mouth thereby facilitating the patient'"'"'s ability to speak, and (c) monitoring ring the pressure within at least one of the passages during both phases for determining the pressure within the patient for use in operating the ventilator assembly.

Claims

1. A method of operating a ventilator assembly that includes a conduit providing inhalation and exhalation passages communicating with one another, and a respiration assembly capable of performing respiratory cycles including

(1) an inhalation phase during which (a) a proportionally controlled inhalation valve communicating with the inhalation passage is relatively open for the passage of gas therethrough into the inhalation passage and to a patient, and (b) a proportionally controlled exhalation valve between the exhalation passage and an exhalation outlet in the ventilator assembly is relatively closed, and

(2) an exhalation phase having a talking mode during which the proportionally controlled inhalation valve is relatively closed, restricting inhalation gas from the patient and the atmosphere, and the exhalation valve is relatively closed, and a non-talking mode during which the proportionally controlled inhalation valve is relatively closed, restricting inhalation gas from the patient and the atmosphere, and the proportionally controlled exhalation valve is relatively open, the method comprising acts of:

operating the respiration assembly through respiratory cycles by a respiration assembly controller controlling the proportionally controlled inhalation and exhalation valves so that during the inhalation phase, the gas in the inhalation passage flows through a tube into the patient'"'"'s airway and lungs with the tube inserted below the patient'"'"'s vocal cords, and during the exhalation phase, the proportionally controlled exhalation valve is maintained relatively closed and the patient is allowed to exhale the gases in the patient'"'"'s airway and lungs, around the tube and past the patient'"'"'s vocal cords and out of the patient'"'"'s mouth, thereby facilitating the patient'"'"'s ability to speak, and

monitoring the pressure within at least one of the passages during the inhalation and exhalation phases for purposes of determining a pressure within the patient for use in operating the ventilator assembly by controlling at least one of the proportionally controlled inhalation and exhalation valves, to regulate a desired pressure in at least one of the passages and the patient during both phases, further assisting the patient to talk during the exhalation phase.

2. The method as defined in claim 1, wherein the tube is devoid of a check valve so that gas exhaled by the patient during each exhalation phase is communicated with the passages while both inhalation and exhalation valves are closed.

3. The method as defined in claim 1, wherein the tube has a check valve so that the gas exhaled by the patient during each exhalation phase is prevented from communicating with the passages.

4. The method as defined in claim 1, wherein during the inhalation phase, the inhalation valve is completely open.

5. The method as defined in claim 1, wherein during the inhalation phase the exhalation valve is completely closable and prevents any gas passage therethrough.

6. The method as defined in claim 1, wherein during the exhalation phase the inhalation valve is completely closable and prevents any gas passage therethrough.

7. The method as defined in claim 1, wherein during the exhalation phase, the inhalation valve is controlled to regulate pressure in the conduit to facilitate the patient'"'"'s ability to speak.

8. The method as defined in claim 1, wherein during the exhalation phase, the exhalation valve is completely closable and prevents any gas passage therethrough.

9. The method as defined in claim 1, wherein during the exhalation phase, the exhalation valve is controlled to regulate pressure in the conduit to facilitate the patient'"'"'s ability to speak.

10. The method as defined in claim 1, wherein the monitoring is used to perform one or more of control the inhalation valve and the exhalation valve, detect patient airway blockages, detect that at least a portion of the conduit has been disconnected, and detect occlusions in the conduit.