Total Oxygen Uptake with Two Maximal Breathing Techniques and the Tidal Volume Breathing Technique

Pandit, J. J.; Duncan, Thomas; Robbins, Peter A.

doi:10.1097/00000542-200310000-00015

Cited by 70 publications

(34 citation statements)

References 16 publications

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“…As it is not always known beforehand which patients will turn out later to present airway management problems, it seems logical to pre-oxygenate all patients routinely. There is considerable debate about the optimum methods of pre-oxygenation in different clinical scenarios, but it is important to employ the method that achieves the highest concentration of oxygen within the lungs [11]. Second, the modelling results confirm that obese patients are at far greater risk of critical desaturation, and if they also have other medical problems or features suggesting difficult intubation, they should be managed with extreme caution.…”

Section: Relevance To the 'Can't Intubate Can't Ventilate' Situationmentioning

confidence: 86%

Simulating hypoxia and modelling the airway

Farmery

2011

Anaesthesia

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SummaryApnoea due to airway obstruction is an ever present concern in anaesthesia and critical care practice and results in rapid development of hypoxaemia that is not always remediable by manual bag‐mask ventilation. As it is often difficult or impossible to study experimentally (although some historical animal data exist), it is useful to model the kinetics of hypoxaemia following airway obstruction. Despite being a complex event, the consequences of airway obstruction can be predicted with reasonable fidelity using mathematical and computer modelling. Over the last 15 years, a number of high fidelity mathematical and computer models have been developed, that have thrown light on this important event.

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Section: Relevance To the 'Can't Intubate Can't Ventilate' Situationmentioning

confidence: 86%

Simulating hypoxia and modelling the airway

Farmery

2011

Anaesthesia

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“…The difference between the results of the preoxygenation studies may be attributed to different patient populations, different anesthesia systems used, and the wide range of fresh gas flows (4 L/min-35 L/min) (6,7). It is reported in the literature that optimal oxygenation may be provided by 3 min normal TVB, with a 5 L/min oxygen flow with conventional respiratory circuits, and that a minimum of 10 L/min gas flow is necessary and adequate for nitrogen washout with the 8DBs method (6,27).…”

Section: Discussionmentioning

confidence: 99%

“…It is reported in the literature that optimal oxygenation may be provided by 3 min normal TVB, with a 5 L/min oxygen flow with conventional respiratory circuits, and that a minimum of 10 L/min gas flow is necessary and adequate for nitrogen washout with the 8DBs method (6,27). We utilized these reports in preparation of our study protocol.…”

Section: Discussionmentioning

confidence: 99%

Comparison of tidal volume and deep breath preoxygenation techniquesundergoing coronary artery bypass graft surgery: effects of hemodynamicresponse and arterial oxygenation*

Taş¹,

Hoşten²,

Kuş³

et al. 2017

Turk J Med Sci

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Background/aim: Different techniques exist for the preoxygenation of patients that will be operated on under general anesthesia. Preoxygenation with the deep breath (DB) method may affect cardiovascular stability, which is crucial for coronary artery bypass graft (CABG) patients. In this study, we aimed to compare the effects of the 3 min TVB preoxygenation technique and 1 min 8DBs technique on hemodynamic response and arterial oxygenation in patients with normal ejection fraction that were scheduled for elective CABG surgery.Materials and methods: Forty patients classified as ASA II-III and scheduled for elective CABG surgery were randomly assigned to TVB/3 min or 8DBs/1 min for preoxygenation. Cardiovascular variables, i.e. heart rate, mean arterial pressure, central venous pressure, cardiac index, systemic vascular resistance index, and stroke volume index, and arterial blood gas samples were analyzed before and after preoxygenation and at the end of the apneic period before intubation. Results:The preoxygenation methods affected the hemodynamic response similarly. PaO2 increased significantly with 8DBs compared to the TVB at the end of preoxygenation but was similar between the groups at the end of the apneic period (respectively, P: 0.03; P: 0.15). PaCO2 changes were similar between the groups. Conclusion:In patients with normal ejection fraction scheduled for CABG, 8DBs can be an alternative to TVB preoxygenation. Our results should be compared with those of other studies.

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“…Although for some recent literature that suggests atelectasis and shunting caused by it, preoxygenation has been advocated for the morbidly obese group of patients. [20,21] Cardiac function should be evaluated for the presence of hypertension, cardiomyopathies, arrhythmias, and ischemic heart disease as well as venous stasis and peroperative pulmonary emboli risks. These patients also need to be evaluated and prophylactic treatments should be started for reflux, aspiration,metabolic syndrome and glucose control.…”

Section: Preoperative Preparation Of the Morbidly Obese Patientmentioning

confidence: 99%

Anesthesia for the surgical procedures of the morbidly obese

Pamuk¹

2017

Laparosc Endosc Surg Sci

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Surgery for the morbidly obese is no longer a novelty. Understanding the basic mechanisms of the pathophysiology of morbid obesity and taking simple precautions while preparing these patients for surgery will help reduce complications. This review outlined preoperative, perioperative, and postoperative management of the morbidly obese patient in line with the current knowledge. Airway management, drug choices, changes in respiratory, circulatory, urinary, and metabolic systems were discussed. Some early and long-term changes in the morbidly obese, like gastroesophageal reflux and vitamin deficiencies were also summarized to aid in subsequent operations and management.

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Total Oxygen Uptake with Two Maximal Breathing Techniques and the Tidal Volume Breathing Technique

Abstract: For the physiologic measurements that were made, both the 3-min and the 8DB method are superior to the 4DB method. The 3-min and 8DB methods seem to be equally effective.

Cited by 70 publications

References 16 publications

Simulating hypoxia and modelling the airway

Simulating hypoxia and modelling the airway

Comparison of tidal volume and deep breath preoxygenation techniquesundergoing coronary artery bypass graft surgery: effects of hemodynamicresponse and arterial oxygenation*

Anesthesia for the surgical procedures of the morbidly obese

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