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Biomedical subjects

S Brosnan

Publications and source records attributed to S Brosnan.

7 recordsLinked to original sources

The reported use of dietary supplements (sip feeds) in hospitals in Wessex, UK.

AIMS: To assess the prevalence of the use of supplements (sip feeds) in district general, psychiatric and community hospitals in the former Wessex health region. METHOD: Cross sectional study of prevalence and determinants of supplement use in 10 district general hospitals (covering medical, surgical, orthopaedic, and elderly specialities), 4 psychiatric hospitals and 3 community hospitals. RESULTS: Overall 14% of patients were being supplemented although the variation across hospitals and specialities was wide (0%-35%); elderly care patients within district hospitals were most likely to be supplemented (20%; range 12-35%). In 34% of patients there was no documented reason as to why supplements were given. 60% of patients were not weighed on admission; 70% did not have a weight history recorded and 83% did not have a current weight recorded. Documentation regarding supplement use appeared to be recorded in an unsystematic manner. CONCLUSIONS: Many patients were not being weighed on admission and appeared to have no documentation as to why supplements were given. Given the importance of malnutrition in hospital patients a more evidence based, objective approach to assessing nutritional requirements, intake and support may be beneficial.

Age Factors↗

Isoflurane concentrations using uncompensated vaporisers within circle systems.

In a series of studies designed to investigate the need for a temperature-compensated vaporiser for use in a circle system, we first studied temperature changes within and isoflurane concentration delivered by a Komesaroff vaporiser during bench tests using different gas flows. Agent temperature and vapour concentration decreased as predicted by the Antoine equation. Using the vaporiser within a circle system during clinical anaesthesia, we then studied 20 patients breathing spontaneously and a further 10 patients receiving controlled ventilation, measuring the temperature of the agent within the vaporiser and the concentration of agent inspired by a the patient. In clincial use with the frest gas flows of 1-3.min-1, the inspired agent concentration did not decrease despite the decrease in temperature of the liquid isoflurane in the vaporiser.

Anesthesia, Closed-Circuit↗

Controlled ventilation using isoflurane with an in-circle vaporiser.

We studied 19 patients anaesthetised for routine surgery using isoflurane delivered from a Komesaroff vaporiser mounted within a circle system. Their lungs were ventilated using a Penlon Nuffield ventilator attached to the circle system by a trunk of tubing. Fresh gas flow rates of 1, 2 or 31.min-1 were used. The inspired agent concentration was measured using a Datex Ultima multigas analyser and was found to be stable and easily controlled.

Anesthesia, Closed-Circuit↗