GB2608926A - Systems for use in the ventilation of patients - Google Patents

Systems for use in the ventilation of patients Download PDF

Info

Publication number
GB2608926A
GB2608926A GB2214492.7A GB202214492A GB2608926A GB 2608926 A GB2608926 A GB 2608926A GB 202214492 A GB202214492 A GB 202214492A GB 2608926 A GB2608926 A GB 2608926A
Authority
GB
United Kingdom
Prior art keywords
line
patient
ventilator
air line
breathing circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
GB2214492.7A
Other versions
GB202214492D0 (en
Inventor
Mcvicar Martin
Moffett Robert
Whyte Mark
Patacho Antonio
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Combilift Ltd
Original Assignee
Combilift Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Combilift Ltd filed Critical Combilift Ltd
Publication of GB202214492D0 publication Critical patent/GB202214492D0/en
Publication of GB2608926A publication Critical patent/GB2608926A/en
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/105—Filters
    • A61M16/106—Filters in a path
    • A61M16/1065—Filters in a path in the expiratory path
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/105—Filters
    • A61M16/106—Filters in a path
    • A61M16/107—Filters in a path in the inspiratory path
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/201—Controlled valves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0057—Pumps therefor
    • A61M16/0066—Blowers or centrifugal pumps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0816—Joints or connectors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0816—Joints or connectors
    • A61M16/0833—T- or Y-type connectors, e.g. Y-piece
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0875—Connecting tubes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/201—Controlled valves
    • A61M16/202—Controlled valves electrically actuated
    • A61M16/203—Proportional
    • A61M16/204—Proportional used for inhalation control
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/201—Controlled valves
    • A61M16/202—Controlled valves electrically actuated
    • A61M16/203—Proportional
    • A61M16/205—Proportional used for exhalation control
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/0027—Accessories therefor, e.g. sensors, vibrators, negative pressure pressure meter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/50—General characteristics of the apparatus with microprocessors or computers
    • A61M2205/502—User interfaces, e.g. screens or keyboards
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/84—General characteristics of the apparatus for treating several patients simultaneously

Landscapes

  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

A system for use in the ventilation of a patient, particularly for a patient using a breathing circuit that is connected along with one or more other breathing circuits to a shared ventilator. The system employs a flow control valve on an inspire air line of an individual breathing circuit for that patient, and measures the tidal volume and pressure in the breathing circuit. A controller is provided with a user interface allowing a desired target volumetric measurement to be input. In response, a control signal is calculated and output to the valve causing the air supply on the inspire line to be adjusted until the measured tidal volume matches the desired volume within a given tolerance. In this way, patient safety is improved for a shared ventilator, by tailoring the ventilation on an individual breathing circuit using a single input value.

Claims (22)

Claims
1. A system for use in the ventilation of a patient, the system comprising: airflow volume sensing means for provide a measurement of the volume of air passing through an air line forming part of a patient breathing circuit when said airflow volume sensing means is in communication said air line; pressure sensing means for providing a measurement of the pressure within an air line forming part of said patient breathing circuit when said pressure sensing means is in communication with said air line; a flow control valve which is controllable with a control signal to alter the airflow through an inspiration air line of said patient breathing circuit on which it is mounted; a user interface enabling a user to input a target volumetric parameter for ventilation of a patient connected to said breathing circuit; and processing means having inputs connected to said airflow volume sensing means, pressure sensing means and user interface and an output connected to said flow control valve, the processing means being programmed with instructions which are effective to: receive a measurement from the airflow volume sensing means indicative of the volume of air passing through an air line of the patient breathing circuit; receive a measurement from the pressure sensing means indicative of the pressure within an air line of the patient breathing circuit; receive a target volumetric parameter from said user interface; calculate a control signal which is effective to control the flow control valve to alter the airflow through the inspiration air line of the patient breathing circuit to achieve the target volumetric parameter in the ventilation of the patient to within a predetermined tolerance; and output said control signal to said flow control valve.
2. The system of claim 1, wherein the airflow volume sensing means and the pressure sensing means are in communication with the same air line of the breathing circuit.
3. The system of any preceding claim, further comprising said breathing circuit.
4. The system of any preceding claim, wherein the breathing circuit comprises said inspiration air line having a proximal end adapted for connection to an inspiration air line of a ventilator, an expiration air line having a proximal end adapted for connection to an expiration air line of a ventilator, and the inspiration and expiration air lines having distal ends that are connected to a common inspire/expire air line to which the patient is connected.
5. The system of claim 4, wherein the inspiration air line of the ventilator and the expiration air line of the ventilator, to which the breathing circuit air lines are connected, support a plurality of breathing circuits.
6. The system of claim 5, wherein the inspiration air line of the ventilator and the expiration air line of the ventilator are connected by an open connection line.
7. The system of any of claims 4-6, wherein the airflow volume sensing means is in communication with the common inspire/expire air line.
8. The system of any of claims 4-7, wherein the pressure sensing means is in communication with the common inspire/expire air line.
9. The system of any preceding claim, wherein the target volumetric parameter is a target tidal volume.
10. The system of any preceding claim, wherein the flow control valve is mounted to a controller body and mechanically coupled to a motor in the controller body.
11. The system of any preceding claim, wherein the calculation of a control signal comprises comparing a measured volume of air delivered to the patient with the target volumetric parameter to determine a required change in delivered air volume; and determining a control signal that will be effective to alter the airflow sufficiently to achieve the target volumetric parameter within a predetermined tolerance.
12. The system of any preceding claim, wherein the calculation of a control signal is such as to provide an incremental change to the valve state which causes the airflow to more closely approach the target volumetric parameter, and wherein the processor operates a feedback loop using the measured volume of air to continue changing the valve state incrementally until the target volumetric parameter is achieved within a predetermined tolerance.
13. The system of any preceding claim, wherein the airflow volume sensing means continues to provide measurements to the processor after the adjustment of the flow control valve has terminated, and if a change is detected in the measured airflow volume which exceeds a threshold, a further control signal is calculated and output to the valve to restore the airflow towards the target volumetric parameter.
14. The system of any preceding claim, wherein the system is configured to deactivate the flow control valve a predetermined time after the target volumetric parameter is achieved.
15. A method of operating a processor of a system for use in the ventilation of a patient comprising the steps, carried out by the processor, of: receiving a measurement from an airflow volume sensing means indicative of the volume of air passing through an air line of a patient breathing circuit; receiving a measurement from a pressure sensing means indicative of the pressure within an air line of the patient breathing circuit; receiving a target volumetric parameter from a user interface; calculating a control signal which is effective to control a flow control valve to alter the airflow through an inspiration air line of the patient breathing circuit to achieve the target volumetric parameter in the ventilation of the patient to within a predetermined tolerance; and outputting said control signal to said flow control valve.
16. A computer program product comprising instructions which when carried out by a processor of a system for use in the ventilation of a patient are effective to cause said processor to carry out the method of claim 15.
17. A breathing circuit comprising a system according to any of claims 1-14, an inspiration air line, an expiration air line, and a common air line from which a patient is ventilated, wherein the flow control valve of the system is mounted on the inspiration air line, the airflow volume sensing means is in communication with one of said air lines, and the pressure sensing means is in communication with one of said air lines.
18. A ventilation system for a plurality of patients comprising a common ventilator connected to a ventilator inspire line and a ventilator expire line, and a plurality of breathing circuits according to claim 17, each of said breathing circuits having its inspiration air line connected to the ventilator inspire line, and each of said breathing circuits having its expiration air line connected to the ventilator expire line.
19. A ventilation system according to claim 18, further comprising a connection line providing an open connection between the ventilator inspire line and the ventilator expire line.
20. A system for ventilating a plurality of patients, comprising: a shared ventilator having an inspire port to which a shared ventilator inspire line is connected, and an expire port to which a shared ventilator expire line is connected; a first patient breathing circuit having a first patient circuit inspiration line connected to the shared ventilator inspire line and a first patient circuit expiration line connected to the shared ventilator expire line; a second patient breathing circuit having a second patient circuit inspiration line connected to the shared ventilator inspire line and a second patient circuit expiration line connected to the shared ventilator expire line; wherein at least one of the patient breathing circuits comprises a flow control valve which is controllable with a control signal to alter the airflow through the breathing circuit of which it forms part; and a connection line providing an open connection between the shared ventilator inspire line and the shared ventilator expire line.
21. A system according to claim 20, wherein the shared ventilator is configured to alternately open and close the inspire and expire ports.
22. A system according to claim 20, wherein the first patient breathing circuit and/or the second patient breathing circuit is a breathing circuit according to claim 17.
GB2214492.7A 2020-04-29 2021-04-29 Systems for use in the ventilation of patients Pending GB2608926A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP20172044 2020-04-29
EP20209355 2020-11-23
PCT/EP2021/061304 WO2021219805A2 (en) 2020-04-29 2021-04-29 Systems for use in the ventilation of patients

Publications (2)

Publication Number Publication Date
GB202214492D0 GB202214492D0 (en) 2022-11-16
GB2608926A true GB2608926A (en) 2023-01-18

Family

ID=75674859

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2214492.7A Pending GB2608926A (en) 2020-04-29 2021-04-29 Systems for use in the ventilation of patients

Country Status (2)

Country Link
GB (1) GB2608926A (en)
WO (1) WO2021219805A2 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1326670A2 (en) * 2000-10-17 2003-07-16 Newport Medical Instruments, Inc. Breathing apparatus and method
US20040230113A1 (en) * 2003-04-22 2004-11-18 Kenneth Bolam MRI/NMR-compatible, tidal volume control and measurement systems, methods, and devices for respiratory and hyperpolarized gas delivery
US20050016534A1 (en) * 2003-06-18 2005-01-27 Mats Ost User interface for a medical ventilator
US8001967B2 (en) * 1997-03-14 2011-08-23 Nellcor Puritan Bennett Llc Ventilator breath display and graphic user interface
US20130087146A1 (en) * 2009-11-11 2013-04-11 Matthew John Callaghan Ventilation systems and methods

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8001967B2 (en) * 1997-03-14 2011-08-23 Nellcor Puritan Bennett Llc Ventilator breath display and graphic user interface
EP1326670A2 (en) * 2000-10-17 2003-07-16 Newport Medical Instruments, Inc. Breathing apparatus and method
US20040230113A1 (en) * 2003-04-22 2004-11-18 Kenneth Bolam MRI/NMR-compatible, tidal volume control and measurement systems, methods, and devices for respiratory and hyperpolarized gas delivery
US20050016534A1 (en) * 2003-06-18 2005-01-27 Mats Ost User interface for a medical ventilator
US20130087146A1 (en) * 2009-11-11 2013-04-11 Matthew John Callaghan Ventilation systems and methods

Also Published As

Publication number Publication date
WO2021219805A3 (en) 2022-01-27
GB202214492D0 (en) 2022-11-16
WO2021219805A2 (en) 2021-11-04

Similar Documents

Publication Publication Date Title
JP6927985B2 (en) Humidification of respiratory gas
EP1326671B1 (en) Ventilator with dual gas supply
WO2007142642A1 (en) System and method for adaptive high frequency flow interrupter control in a patient respiratory ventilator
JP2013536748A5 (en)
NZ554007A (en) Gas flow control method in a blower based ventiliation system
EP3113819B1 (en) Delivering variable positive airway pressure depending on awake state and sleep disordered breathing
JP5878522B2 (en) Inductance compensation in pressure assist systems
AU2006303816B2 (en) Method and apparatus for improving flow and pressure estimation in CPAP systems
JP2018533999A (en) Ventilator with error detector for flow sensor
GB2608926A (en) Systems for use in the ventilation of patients
US9878113B2 (en) Pressure control in respiratory treatment apparatus
EP4060450A3 (en) Flowrate determination system and method for a flow control valve
AU2018329656B2 (en) Method for calibrating the performance range of a pneumatically sealed trocar
US20210322696A1 (en) Ventilator
WO2021204972A1 (en) Control method for medical ventilators
JP7251920B2 (en) medical device
JP2016123556A (en) Respiration assisting device and inhalation pressure control method
US20160206836A1 (en) System and method for aiding breathing
EP2281593A1 (en) Medical blower control via pneumatic patient model
CN117547698A (en) Fan control method, device, equipment, storage medium and program product
CN117489620A (en) Turbine fan control method, turbine control system and breathing machine
CN116603142A (en) Oxygen concentration control method for breathing machine and breathing machine
WO2023152712A1 (en) Patient gas delivery systems and methods
RU2021136656A (en) DEVICE FOR ARTIFICIAL LUNG VENTILATION