References of "Rollin, Frédéric"
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See detailValidation of the Thermodilution Technique for the Estimation of the Cardiac Output in the Unsedated Calf
Amory, Hélène ULg; Linden, Annick ULg; Desmecht, Daniel ULg et al

in Journal of Veterinary Medicine. A, Physiology, Pathology, Clinical Medicine (1991), 38(6), 409-417

The purpose of this study was to establish a standardized protocol in order to obtain accurate and reproducible cardiac output (CO) measurements by the thermodilution technique in the unsedated calf. In 5 ... [more ▼]

The purpose of this study was to establish a standardized protocol in order to obtain accurate and reproducible cardiac output (CO) measurements by the thermodilution technique in the unsedated calf. In 5 healthy calves, the effect of various temperatures, volumes, rates, means and sites of injection of the thermal indicator were tested for their effect on accuracy and reproducibility of CO measurement by the thermodilution technique, the Fick method being used as the standard technique. Five milliliters of an iced 5% dextrose solution per 100 kg body weight constituted the correct amount of thermal indicator. Manual injection of the indicator bolus and/or injection of this bolus through the proximal lumen of a thermodilution Swan-Ganz catheter gave poor results of CO measurements by the thermodilution technique. On the other hand, results of CO measurements were highly reliable when the bolus injection was performed by an ECG-synchronized injection pump and/or through a right atrial catheter with a larger diameter and a shorter length than the classical Swan-Ganz catheter. It was concluded that an iced 5% solution of dextrose (5 ml/100 kg body weight) injected through a right atrial catheter by an ECG-synchronized pump gives the most accurate and reproducible CO measurements by the thermodilution technique in unsedated calves. [less ▲]

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See detailCharacterization of the physiological work by measurement of plasma cortisol values in horses competing in 5 different sports disciplines
Linden, Annick ULg; Massart-Leen, M.; Art, Tatiana ULg et al

in Archives Internationales de Physiologie et de Biochimie (1990, February)

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See detailRespiratory-Induced Variability of Pulmonary Arterial Pressure Measurements in Cattle
Amory, Hélène ULg; Art, Tatiana ULg; Desmecht, Daniel ULg et al

in Veterinary Research Communications (1990), 14(3), 227-33

The purpose of this study was to investigate the variability of the peak systolic (PAPs) and the end diastolic (PAPd) pulmonary arterial pressures induced by intrapleural pressure changes in cattle. The ... [more ▼]

The purpose of this study was to investigate the variability of the peak systolic (PAPs) and the end diastolic (PAPd) pulmonary arterial pressures induced by intrapleural pressure changes in cattle. The pleural pressure (Ppl), the electrocardiogram and the pulmonary arterial pressure (PAP) were simultaneously recorded in five healthy calves under three different conditions, i.e. normoxia (N), normoxia with an added airflow resistance (R) and hypoxia (H). PAPs, PAPd and their corresponding transmural pressures were measured and averaged over 10 successive regular cardiac cycles. The maximum Ppl changes (max delta Ppl) were measured on the same tracings. The variance and coefficients of variation were calculated for each set of vascular measurements. Max delta Ppl was significantly increased with regard to N values during R and H conditions. This increase in max delta Ppl induced a simultaneous rise in the variability of PAP measurements, while in each condition, this variability was greatly lowered by use of the corresponding transmural pressure. It was concluded that, in calves with high max delta Ppl, the influence of respiration on PAP becomes considerable. In such cases, the use of transmural pressures rather than luminal pressures can greatly reduce the variability of these pulmonary pressure measurements and therefore increase their sensitivity. [less ▲]

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See detailPhysiological, pathophysiological and pharmacological studies of the mechanics of breathing in cattle
Lekeux, Pierre ULg; Amory, Hélène ULg; Art, Tatiana ULg et al

in Proceedings du Congrès National Vétérinaire Yougoslave (1990)

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See detailLa mecanica respiratoria en terneros sanos respirando Helio-Oxigeno
Rodriguez, MN; Art, Tatiana ULg; Rollin, Frédéric ULg et al

in Proceedings of the XVIth World Buiatrics Congress (1990)

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See detailEtude de l'intervention de la sérotonine en tant que facteur pathogénique potentiel dans les maladies respiratoires des bovins
Desmecht, Daniel ULg; Genicot, B; Linden, Annick ULg et al

in Proceedings of the XVIth World Buiatrics Congress (1990)

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See detailLa mecanica respiratoria en terneros sanos respirando Helio-Oxigeno
Rodriguez, MN; Art, Tatiana ULg; Rollin, Frédéric ULg et al

in Proceedings of the XVIIIth Jordanas Uruguayas de Buiatria (1990)

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See detailEffect of gas density on ventilatory mechanics in healthy calves
Rollin, Frédéric ULg; Rodriguez, MN; Art, Tatiana ULg et al

in Archives Internationales de Physiologie et de Biochimie (1990)

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See detailPulmonary vascular response of healthy calves to intravenous and aerosol 5-hydroxytryptamine
Desmecht, Daniel ULg; Amory, Hélène ULg; Rollin, Frédéric ULg et al

in Archives Internationales de Physiologie et de Biochimie (1990)

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See detailApplication of four lead systems to quantitative electrocardiography in calves
Amory, Hélène ULg; Rollin, Frédéric ULg; Lekeux, Pierre ULg

in Archives Internationales de Physiologie et de Biochimie (1990)

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See detailEtude échocardiographique de la fonction et de la morphologie cardiaque chez le veau hyperviandeux
Amory, Hélène ULg; Genicot, B; Desmecht, Daniel ULg et al

in Proceedings of the XVIth World Buiatrics Congress, (1990)

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See detailVentilatory Mechanics in Healthy Calves During Helium-Oxygen Breathing
Rodriguez, M. N.; Art, Tatiana ULg; Rollin, Frédéric ULg et al

in Journal of Veterinary Medicine. A, Physiology, Pathology, Clinical Medicine (1990), 37(4), 241-246

The mechanics of breathing was investigated in six healthy calves breathing either air or a mixture of 79% helium and 21% oxygen (He-O2). Intrapleural pressure (Ppl) was measured with an esophageal ... [more ▼]

The mechanics of breathing was investigated in six healthy calves breathing either air or a mixture of 79% helium and 21% oxygen (He-O2). Intrapleural pressure (Ppl) was measured with an esophageal balloon catheter and transpulmonary pressure was obtained by subtracting the mouth pressure (Pm) from Ppl. Respiratory airflow (V) was measured using a Fleisch pneumotachograph N degrees 3 and tidal volume (Vt) was electronically derived by integrating V with respect to time. Respiratory airflow, Vt, Ppl and Pm were simultaneously recorded while the calves breathed first air (1 min), secondly He-O2 (1 min) and finally air again (1 min). The pulmonary function values were calculated on the tracings and the He-O2 values were compared to the corresponding "air" values. The ventilatory response to resistance unloading was characterized by a significant increase in minute volume exclusively due to an increase in respiratory frequency, while Vt remained unchanged. A decrease of 32% in the total pulmonary resistance (RL) and 16% in the work per litre of ventilation (Wrm/l) were observed when calves breathed He-O2. The effect of the He-O2 on RL and on Wrm/l suggests that, in the bovine species, airflow turbulances in the upper part of the respiratory tract play a significant role in the total airways resistance. [less ▲]

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See detailPulmonary response to intravenous 5-hydroxytryptamine in the healthy calf
Desmecht, Daniel ULg; Rollin, Frédéric ULg; Amory, Hélène ULg et al

in Proceedings of the 8th Comparative Respiratory Society Meeting (1989)

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See detailAerosol serotoninergic responses in respiratory mechanics of healthy calves
Desmecht, Daniel ULg; Rollin, Frédéric ULg; Amory, Hélène ULg et al

in Proceedings of the 8th Comparative Respiratory Society Meeting (1989)

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See detailMechanics of breathing and ventilatory drive in double-muscled calves during acute hypoxia
Rollin, Frédéric ULg; Amory, Hélène ULg; Desmecht, Daniel ULg et al

in Proceedings of the 8th Comparative Respiratory Society Meeting (1989)

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See detailDirect measurement of static chest wall compliance in unsedated calves
Desmecht, Daniel ULg; Rollin, Frédéric ULg; Amory, Hélène ULg et al

in Proceedings of the 8th Comparative Respiratory Society Meeting (1989)

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See detailEffect of acute hypoxia on the bovine ventilatory mechanics
Rollin, Frédéric ULg; Amory, Hélène ULg; Desmecht, Daniel ULg et al

in Archives Internationales de Physiologie et de Biochimie (1989)

Detailed reference viewed: 8 (0 ULg)