A New Concept in Controlled Ventilation of Children with the Bain Anesthetic Circuit

Rayburn, Robert L.; Graves, Shirley A.

doi:10.1097/00132586-197904000-00048

Cited by 3 publications

(3 citation statements)

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“…The stability of fractional utilization when FE : FF exceeded 1.5 implies that alveolar carbon dioxide partial pressure became mainly dependent upon FF, which was controlled accurately by the anaesthetic machine flowmeters. This method of utilizing greater than normal minute volumes of ventilation in combination with low fresh gas flows to maintain carbon dioxide homeostasis has been used previously with the T-piece systems [7,17,18], a circle system without an absorber [19] and a modified Magill system [20]. It has been termed "isocapnic ventilation" [20], but it may be more appropriate to use the term isocapnic /zyperventilation.…”

Section: Discussionmentioning

confidence: 99%

Fresh Gas Requirements of an Enclosed Afferent Reservoir Breathing System During Controlled Ventilation in Children

Meakin

Jennings

Beatty

et al. 1992

British Journal of Anaesthesia

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An enclosed afferent reservoir breathing system (EAR) designed by Ohmeda was evaluated during anaesthesia with controlled ventilation in 104 healthy children. Carbon dioxide production and arterial carbon dioxide tension were measured in 12 children in order to determine the proportion of fresh gas (VF) involved in gas exchange. When the ratio of minute volume ventilation to fresh gas flow (VE:VF) exceeded 1.5, fractional utilization of fresh gas with the EAR was 0.92. This value and values of carbon dioxide production obtained from 43 children were used to derive a simple formula relating fresh gas flow requirements to body weight. The formula, VF = 0.6 x weight 0.5, was assessed in 49 children weighing 10-70 kg. The mean end-tidal partial pressure of carbon dioxide in these patients was 4.5 kPa (range 3.8-5.2 kPa). We conclude that the EAR has an efficiency of 92% in the use of fresh gas during controlled ventilation in healthy children, provided the VE:VF ratio is greater than 1.5. Under these conditions, normocapnia to mild hypocapnia was produced accurately using the formula VF = 0.6 x weight 0.5.

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Section: Discussionmentioning

confidence: 99%

Fresh Gas Requirements of an Enclosed Afferent Reservoir Breathing System During Controlled Ventilation in Children

Meakin

Jennings

Beatty

et al. 1992

British Journal of Anaesthesia

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“…Kirby introduced the use of the Baby Bird ventilator to the University of Florida PICU. This ventilator technology led to research and development of intermittent mandatory ventilation there .…”

Section: The Formation Of the Picu At The University Of Floridamentioning

confidence: 99%

Breaking the glass ceiling: an interview with Dr. Shirley Graves, a pioneering woman in medicine

Ahmed

Christine

Elder

et al. 2014

Pediatric Anesthesia

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Shirley Graves M.D., D.Sc. (honorary) (1936), Professor Emeritus of Anesthesiology and Pediatrics at the University of Florida, was one of the most influential women in medicine in the 1960 and 1970s, a time when the medical profession was overwhelmingly male-dominated. In today's society, it is hard to believe that only 50 years ago, women were scarce in the field of medicine. Yet Dr. Graves was a pioneer in the fields of pediatric anesthesia and pediatric critical care medicine. She identifies her development of the pediatric intensive care unit and her leadership in the Division of Pediatric Anesthesia at the University of Florida as her defining contributions. Through her journal articles, book chapters, national and international lectures, and leadership in the American Society of Anesthesiology and the Florida Society of Anesthesiology, she inspired a generation of men and women physicians to conquer the unthinkable and break through the glass ceiling.

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“…A coaxial variant of the Mapleson D system was introduced by BAIN & SPOEREL (1972). This light-weight disposable circuit is especially useful in head and neck surgery, as stated by BAIN & SWEREL (1972), paediatric anaesthesia (RAYBURN & GRAVES 1978), and intensive care units ( FROST et al 1975). The system causes considerable alveolar gas rebreathing because of the small fresh gas inflows recommended by the inventors (BAIN & SPOEREL 1973) (7Oml/kg at a respiratory minute volume of 120-140 ml/kg).…”

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confidence: 99%

Effects of Minute Volume Increases on the Rebreathing Characteristics of the Bain Anaesthesia Circuit During Controlled Ventilation

Ramanathan¹,

Chalon²,

Rothblatt³

et al. 1980

Acta Anaesthesiol Scand

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In the course of a study on the carbon dioxide rebreathing characteristics of the Bain anaesthesia circuit, it was noted that raising the minute volume without changing the fresh gas inflow invariably led to increased rebreathing of expired gases. Altering tidal volume and rate in order to reproduce a given minute volume had the same effect on rebreathing. A nomogram constructed to quantitate increases in rebreathing in function of carbon dioxide production per minute, fresh gas flow from the anaesthesia machine, and minute volume is produced. It can be used to assess the amount of fresh gas flow necessary to mantain a steady and inspired gas composition.

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A New Concept in Controlled Ventilation of Children with the Bain Anesthetic Circuit

Cited by 3 publications

References 0 publications

Fresh Gas Requirements of an Enclosed Afferent Reservoir Breathing System During Controlled Ventilation in Children

Fresh Gas Requirements of an Enclosed Afferent Reservoir Breathing System During Controlled Ventilation in Children

Breaking the glass ceiling: an interview with Dr. Shirley Graves, a pioneering woman in medicine

Effects of Minute Volume Increases on the Rebreathing Characteristics of the Bain Anaesthesia Circuit During Controlled Ventilation

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