Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1989-08-16
1992-07-14
Burr, Edgar S.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820423, 12820426, A61M 1600, A62B 704, F16K 3126, F16K 3102
Patent
active
051293900
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a process for regulating an artificial ventilating device and such device. The invention will be used in particular in the field of construction of medical equipment and in particular equipment to assist patients' inspiration.
2. Discussion of the Background and Pertinent Information
It is customary in the medical field to use a technique known as "Inspiration Assistance" or "Artificial Ventilation" in various cases, in particular when faced with neurological problems, respiratory failure and even during surgical operations and in post-operative phases. These techniques have been known for some considerable time, and endeavors are increasingly being made to reduce the barometric aggression for the patient when inspiration assistance is provided. Indeed, it should be noted that when a healthy individual has spontaneous natural ventilation, the individual causes inspiration by an internal negative pressure and expiration by compression of the volume of air in his or her airways or respiratory passages.
On the other hand, when under artificial ventilation, during the inspiration phase, a respirable gaseous fluid mixture is insufflated to the patient; the individual's airways are accordingly under positive pressure during the inspiration phase, and not under negative pressure as occurs naturally during spontaneous ventilation.
There is a known respiratory assistance device in which the artificial ventilation is controlled. In such device, the controlled ventilation acts as a prosthesis taking over the whole of the patient's ventilatory work. This is called total controlled ventilation.
Other ventilation techniques have been introduced which enable the patient to progressively take part in performing their respiratory function. One known assisted ventilation method utilizes auto-triggered ventilation and inspiration assistance. In this method, the negative pressure caused by this patient's inspiration triggers an inspiration phase either with a volume and duration fixed by the machine, or with the necessary gas flow rate to maintain a desired positive pressure which may be set by an operator.
Such known types of assisted ventilation have numerous disadvantages based primarily on the fact that the patient has to provide substantial inspiratory work, depending on the machine. Further, risks may be caused by such ventilation, such as risks of tachypnea, respiratory alkalosis, or hyperinsufflation.
More recently, other types of artificial ventilation such as closed loop type have been developed with the aim of avoiding an excessively abrupt change from totally controlled ventilation to exclusively natural spontaneous ventilation, to enable the patients to adapt gradually and increase his or her security. Among these are intermittent controlled ventilation, variable imposed ventilation, or the method of CO.sub.2 closed loop ventilation.
In an intermittent controlled ventilation device, there is imposed on the patient, for example, n control cycles to x spontaneous cycles. This type of ventilation has disadvantages residing in the difficulty of setting adjustment and the need for manual intervention to adjust the device as a function of the way in which resuscitation develops.
In a variable imposed ventilation method, the ventilation is controlled by a minimum ventilation per minute setting. In this device, a threshold number of liters of gaseous mixture insufflated per minute is set, and whenever the patient's ventilation falls below this threshold, the ventilator delivers the necessary number of controlled cycles to achieve this threshold. The main inconvenience or disadvantage of this type of imposed ventilation is reflected by the adverse risks that could be produced, such as tachypnea and/or hypercapnia due to a possible increase of CO.sub.2 level in arterial blood.
Analysis of the problems posed by inspiratory assistance for patients reveals the usefulness of limiting the aggressiveness of ventilation, and in an addition permanently
REFERENCES:
patent: 3794026 (1974-02-01), Jacobs
patent: 3961627 (1976-06-01), Ernst et al.
patent: 4036221 (1977-07-01), Hillsman et al.
patent: 4141356 (1979-02-01), Smargiassi
patent: 4206754 (1980-06-01), Cox et al.
patent: 4340044 (1982-07-01), Levy et al.
patent: 4340045 (1982-07-01), Manley
patent: 4444201 (1984-04-01), Itoh
patent: 4481944 (1984-11-01), Bunnell
patent: 4539984 (1985-09-01), Kiszel et al.
patent: 4570631 (1986-02-01), Durkan
patent: 4648395 (1987-03-01), Sato et al.
patent: 4671297 (1987-06-01), Schulze, Jr.
patent: 4686974 (1987-08-01), Sato et al.
patent: 4686975 (1987-08-01), Naimon et al.
patent: 4705034 (1987-11-01), Perkins
patent: 4823788 (1989-04-01), Smith et al.
patent: 4873971 (1989-10-01), Perkins
patent: 4883050 (1989-11-01), Urman et al.
patent: 4905688 (1990-03-01), Vicenzi et al.
patent: 4932402 (1990-06-01), Snook et al.
patent: 4938212 (1990-07-01), Snook et al.
Puritan Bennett 7200, "Series Microprocessor Ventilator", Form AA-214 (Aug. 1987), Printed in U.S.A., 21488.
Puritan Bennett 7200a, "Option #20 DCl", Form AA-991, (Dec. 1987), Printed in U.S.A., 99187.
Puritan Bennett 7202, "Display Accessory", Form AA-1143, (Dec. 1987), Printed in U.S.A., 114387.
Puritan Bennett "7200 Series", Form A-DAA498-02, (Jul. 1988), Printed in U.S.A., 48888.
Puritan Bennett, 7200 Series, "Option 10. Pressure Support", Form AA-763, (Mar. 1989), Printed in U.S.A., 76389.
Puritan Bennett, 7200 Series, "Pulse Oximetry", Form AA-1308, Printed in U.S.A., 130888.
Puritan Bennett, 7200a, "Option #30/40 Respiratory Mechanics", Form AA-985, (Jan. 1987), Printed in U.S.A., 98587.
Puritan Bennett, 7200a, "Option #50 Flow-By", Form AA-1144, (Jan. 1987), Printed in U.S.A., 114487.
Copy of International Search Report for PCT Application No. PCT/FR88/00605 with Annex.
Puritan Bennett, "Enter the Expanding World of the 7200a", Form AA-992, (Sep. 1988), Printed in U.S.A., 99288.
Puritan Bennett, "Effects on the Work of Breathing . . .", Form AA-1495, (Nov. 1989), Printed in U.S.A., 149589.
Ventilators Theory and Clinical Application, Yvon G. Dupuis, C. V. Mosby Co., 1986, Ch. 19-"The Puritan-Bennett 7200 microprocessor Ventilator", pp. 291-311, 19.
Puritan Bennett, "Pedestal Storage Compartment", Form AA-934, (Mar. 1984), Printed in U.S.A., 93484.
Puritan Bennett, "Wall Air Water Trap", Form AA-639, (Jun. 1987), Printed in U.S.A., 63987.
Puritan Bennett, "Single-Patient Use Exhalation Bacteria Filter", Form AA-1236, (Oct. 1987), Printed in U.S.A., 119487.
Puritan Bennett, "Support Program", Form AA-910, (Jun. 1988), Printed in U.S.A. 91088.
Barancourt Herve
Chambrin Marie-Christine
Chopin Claude
Floquet Nicolas
Asher Kimberly L.
Burr Edgar S.
Institut Nationale de la Sante et de la Recherche Medicale
LandOfFree
Process for regulating an artificial ventilation device and such does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for regulating an artificial ventilation device and such, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for regulating an artificial ventilation device and such will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-329434