Preventive health attitudes and practices of elderly persons attending senior centers.
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Aged↗
Biomedical subjects
A A Moore
Publications and source records attributed to A A Moore.
In vivo and in vitro studies of a chronic oxygen saturation sensor.
An oxygen saturation sensor, for the purpose of chronically controlling the heart rhythm produced by a pacemaker, should be specific to oxygen saturation and should be minimally affected by the harsh blood environment. For the sensor type we tested we found: (1) one sensor failure in 205.5 canine-months of chronic implantation (n = 11, range 4 to 50 months); (2) hematocrit-induced error of less than 5 percentage points of SvO2 over the range of 50% to 80% SvO2 and 15% to 45% hematocrit; (3) carboxyhemoglobin (HbCO)-induced error of less than 4 percentage points of SvO2 with HbCO up to 20%; (4) a fibrotic sheath-induced error of less than 3 percentage points of SvO2 in the range of 50% to 80% SvO2 due to fibrotic sheath thicknesses up to 0.22 mm; (5) no significant error induced by velocity variations local to the sensor; (6) no significant error due to temperature in the range of 30 degrees to 42 degrees C; and (7) that the sensor could be as close as 0.3mm to the ventricular wall and still only produce an error of 5% SvO2.
Animals↗
Sensors in pacing.
Sensor driven pacing is emerging as a powerful therapeutic tool to provide paced patients with a more natural heart rhythm, and, additionally, piezoelectricity is one technology that can provide sensed information to the pacemaker--and shows promise in controlling that rhythm.
Electronics, Medical↗
Successive asexual life cycles of starved amoebae in the cellular slime mould, Dictyostelium mucoroides var. stoloniferum.
Dense masses of spores of Dictyostelium mucoroides var. stoloniferum have the ability to germinate and aggregate rapidly in the absence of food. This is made possible by the presence of a dominant, self-produced spore germination activator. The germination-aggregation cycle can be repeated in as many as six successive generations. In each generation the spore size is reduced so that ultimately they are only a fraction of the size of those produced by the parental, bacteria-fed amoebae.
Cell Count↗
Myocardial infarction in early adolescence: a possible manifestation of the prolapsing mitral valve syndrome.
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Acute Disease↗
Computer-aided real-time acquisition of physiological data: technical design and selection constraints.
For many years, physiological investigations have utilized the power and speed of analogue, digital and hybrid computers. Complex protocols often require the recording of large amounts of data in short periods, typically with simultaneous fine control of multiple experimental variables. Current systems often include data analysis in the same program which controls data acquisition. Although this is convenient from a package point of view, acquisition and analysis routines have different and sometimes conflicting purposes and requirements. This paper examines acquisition of continuous physiological signals by small dedicated computers in an attempt to separate these processes and to provide guidelines for computer selection, design and development.
Animals↗