GB1408242A - Respirator - Google Patents
RespiratorInfo
- Publication number
- GB1408242A GB1408242A GB1953573A GB1953573A GB1408242A GB 1408242 A GB1408242 A GB 1408242A GB 1953573 A GB1953573 A GB 1953573A GB 1953573 A GB1953573 A GB 1953573A GB 1408242 A GB1408242 A GB 1408242A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gas
- signal
- piston
- volume
- patient
- 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.)
- Expired
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
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
- A61M16/0009—Accessories therefor, e.g. sensors, vibrators, negative pressure with sub-atmospheric pressure, e.g. during expiration
-
- 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
- A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means
- A61M16/022—Control means therefor
- A61M16/024—Control means therefor including calculation means, e.g. using a processor
-
- 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
- A61M16/0072—Tidal volume piston 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
- A61M16/0057—Pumps therefor
- A61M16/0075—Bellows-type
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)
- Respiratory Apparatuses And Protective Means (AREA)
- Electrotherapy Devices (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
Abstract
1408242 Respirator systems SUTTER HOSPITALS MEDICAL RESEARCH FOUNDATION 25 April 1973 [1 May 1972] 19535/73 Heading A5T A volume-cycled respirator comprises gas delivery means displaceable for forcing a volume of gas under pressure into the lungs of a patient during an inspiratory period of a respiratory cycle, drive means for displacing the gas delivery means, means for generating a reference signal representing a time-varying position of the gas delivery means during the cycle necessary to deliver a desired volume of gas in accordance with a desired volume-versustime wave-form, and closed loop feed back means for continuously controlling changes in the position of the gas delivery means whereby gas is delivered in accordance with the desired waveform, the feed back means including first means responsive to the actual position of the gas delivery means for generating a position feedback signal representing the actual volume of gas delivered and second means responsive to the reference signal and position feedback signal for providing a position error signal which is applied to the drive means to control the position of the gas delivery means throughout the inspiratory period.' The apparatus may comprise a piston and cylinders 32, 34 supplying gas to a patient through line 42 under the control of a computer and waveform generator 46 programmed to give an output signal 54 proportional to the desired volume of gas to be delivered as a function of time, the signal 54 being adjustable manually or automatically by an input 58 representing an optimum waveform generated by the computer. The position of piston 32 is continuously adjusted to maintain desired gas flow by a transducer 74 which determines the instantaneous position of piston 32 within cylinder 34 and produces a signal 76 proportional to the volume of gas delivered to the patient. The signals 54, 76 are compared at summing point 78 to produce an end signal 80 representing deviation from the desired volume, this signal 80 being fed to the piston drive means 36 to continuously adjust the position of the piston. Adjustable respiratory rate, inspiration-expiration time ratio and tidal volume commands are delivered to the computer. The piston is preferably actuated electrically. A secondary piston and cylinder 98, 96 may be provided for storage of gas which cannot be accepted by the patient, the gas accommodated therein being forced into the patient's lungs at the end of the inspiratory cycle. An analogue computer 100 receives signals 104, 108 from transducers 102, 106 respectively proportional to the pressure in cylinder 34 (and the patient's lungs) and the position of piston 98. The computer 100 produces an output 112 representing a desired waveform for time dependent pressure build-up in the patient's lungs and this signal is compared at summing point 128 with actual pressure build-up waveform 126 derived from a logic circuit 118 computing time elapsed in the inspiratory cycle and pressure signal 104. The pressure end signal 130 is converted to a position end signal 132 partially controlling the position of piston 98. Computer 100 is also programmed to actuate piston 98 so that the entire predetermined volume of gas is fed to the patient by the end of the inspiratory cycle. To avoid excessive pressure build-up in the patient's lungs if the volume of gas within cylinder 96 is high towards the end of the inspiratory cycle means are provided for prolonging the cycle. A pressure relief valve 148 is also provided to vent excess pressure to atmosphere. Means for introducing an artificial sigh into the respiratory cycle may be provided.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US24938072A | 1972-05-01 | 1972-05-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1408242A true GB1408242A (en) | 1975-10-01 |
Family
ID=22943226
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1953573A Expired GB1408242A (en) | 1972-05-01 | 1973-04-25 | Respirator |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS529073B2 (en) |
CA (1) | CA996196A (en) |
DE (1) | DE2321574C3 (en) |
DK (1) | DK153632C (en) |
FR (1) | FR2183015B1 (en) |
GB (1) | GB1408242A (en) |
NL (1) | NL178843C (en) |
NO (1) | NO137984C (en) |
SE (1) | SE410084B (en) |
ZA (1) | ZA732336B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2121292A (en) * | 1982-03-05 | 1983-12-21 | Hewlett Packard Co | Parametrically controlled medical ventilator for patient ventilation |
US5540222A (en) * | 1991-02-19 | 1996-07-30 | University Of Manitoba | Piston-based ventilator design and operation |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4106503A (en) * | 1977-03-11 | 1978-08-15 | Richard R. Rosenthal | Metering system for stimulating bronchial spasm |
EP0282675A3 (en) * | 1986-11-04 | 1990-01-03 | Bird Products Corporation | Flow control valve for a medical ventilator |
DE19528113C2 (en) * | 1995-08-01 | 2002-09-12 | Univ Ludwigs Albert | ventilator |
DE19809867C1 (en) * | 1998-03-07 | 1999-09-30 | Draeger Medizintech Gmbh | Respiration hose compliance evaluation method for artificial respiration apparatus |
CN106730195B (en) * | 2016-11-29 | 2019-04-30 | 湖南水口山有色金属集团有限公司 | A kind of breathing machine ventilation control circuit |
WO2021189138A1 (en) * | 2020-03-23 | 2021-09-30 | Khwaja Kosar | Ventilator adaptors |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1439754A (en) * | 1965-07-13 | 1966-05-20 | New reciprocating motion generation device with precise and modifiable characteristics |
-
1973
- 1973-04-04 ZA ZA732336A patent/ZA732336B/en unknown
- 1973-04-16 CA CA168,877A patent/CA996196A/en not_active Expired
- 1973-04-25 GB GB1953573A patent/GB1408242A/en not_active Expired
- 1973-04-25 FR FR7314928A patent/FR2183015B1/fr not_active Expired
- 1973-04-27 SE SE7306024A patent/SE410084B/en unknown
- 1973-04-27 NO NO1754/73A patent/NO137984C/en unknown
- 1973-04-28 DE DE2321574A patent/DE2321574C3/en not_active Expired
- 1973-05-01 JP JP48047635A patent/JPS529073B2/ja not_active Expired
- 1973-05-01 DK DK235073A patent/DK153632C/en not_active IP Right Cessation
- 1973-05-01 NL NLAANVRAGE7306054,A patent/NL178843C/en not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2121292A (en) * | 1982-03-05 | 1983-12-21 | Hewlett Packard Co | Parametrically controlled medical ventilator for patient ventilation |
US5540222A (en) * | 1991-02-19 | 1996-07-30 | University Of Manitoba | Piston-based ventilator design and operation |
Also Published As
Publication number | Publication date |
---|---|
DK153632C (en) | 1988-12-12 |
NL178843C (en) | 1986-06-02 |
JPS4948188A (en) | 1974-05-10 |
FR2183015B1 (en) | 1978-12-29 |
DE2321574A1 (en) | 1973-11-15 |
JPS529073B2 (en) | 1977-03-14 |
CA996196A (en) | 1976-08-31 |
FR2183015A1 (en) | 1973-12-14 |
NO137984C (en) | 1978-06-07 |
DK153632B (en) | 1988-08-08 |
NO137984B (en) | 1978-02-27 |
DE2321574C3 (en) | 1978-07-20 |
NL7306054A (en) | 1973-11-05 |
DE2321574B2 (en) | 1977-12-08 |
ZA732336B (en) | 1974-01-30 |
SE410084B (en) | 1979-09-24 |
NL178843B (en) | 1986-01-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |