Combined Influences of Inspiratory Loading and Subsystolic Circulatory Occlusion on Blood Pressure Responses

Circulatory changes associated with inspiratory positive pressure treatment.

In the past decade there has been increasing application of positive pressure in the administration of oxygen therapy in the management of asthma and emphysema, as well as other conditions in which it was considered that this form of therapy might be of benefit. The present study is limited to the application of positive pressure during the inspiratory phase of the respiratory cycle. Two types ...

Maternal and fetal influences on blood pressure.

To study maternal and fetal influences on blood pressure in childhood 405 children aged 4 years who were born and still resident in the Salisbury health district were visited at home for blood pressure and growth measurements. Information on the pregnancy, delivery, and baby was abstracted from the routine obstetric notes. Similar to recent findings in adults, the child's systolic pressure was ...

Effects of saline loading on the renin, erythropoietin, and blood pressure responses to canine renal allotransplantation.

Comparison of occlusion pressure and ventilatory responses.

The airway pressure 100 msec after the onset of an inspiratory effort against a closed airway (P100, occlusion pressure) is theoretically a more accurate index of respiratory neuron motor output than ventilation. Occlusion pressure and ventilation responses to hypercapnia were compared in repeated trials in 10 normal subjects while in the seated and supine positions. During progressive hypercap...

Responses of blood pressure and catecholamine metabolism to high salt loading in endothelin-1 knockout mice.

The molecular mechanism responsible for salt sensitivity is poorly understood. Mice heterozygous for the null mutation of the endothelin-1 (ET-1) gene, Edn1, may be a potential tool for studying this mechanism, because they have elevated blood pressure and disturbances in central sympathetic nerve regulation. In the present study, we used this mouse model to examine the degree to which ET-1 con...