Biomedical subjects

L B Gale

Publications and source records attributed to L B Gale.

4 recordsLinked to original sources

PubMed1997

Laboratory evaluation of the I-NOvent nitric oxide delivery device.

The "I-NOvent delivery system" (Ohmeda Inc., Madison, WI, USA) is a device designed to add nitric oxide to a ventilator breathing system so that the inspired nitric oxide concentration remains constant in spite of changes in minute ventilation. In a laboratory study the device maintained the inspired nitric oxide concentration delivered to a model lung in the range 10.2-10.7 parts per million (ppm) when set to deliver 10 ppm, and in the range 40.5-42 ppm when set to deliver 40 ppm, for tidal volumes of 500, 700 and 900 ml, ventilator rates of 10, 15 and 20 bpm, peak inspiratory flow rates of 30, 40 and 50 litre min-1, and square, sine and decelerating ramp flow waveforms.

Drug Administration Schedule↗

PubMed1993

Development of a concentric water-displacement model lung.

Simulation of lung ventilation using a model lung can provide a means of evaluating lung function tests, mathematical models and computer algorithms. We describe a new water-displacement lung model, which can simulate lung volumes up to 3.8 l and tidal volumes up to 1 l. Gas mixing is ensured by using a ring of venturi devices. Model compliance and airways resistance are described.

Airway Resistance↗

PubMed1992

In vitro performance test system for pulse oximeters.

An in vitro system was developed capable of testing the accuracy and reproducibility of pulse oximeter readings. The pulse oximeter probe receives signals through a pulsating blood cuvette. The development of the design of the cuvette is described. Using the final design (or 'model finger'), a comparison is made between readings from a Datex Satlite pulse oximeter (SpO2) and saturation values obtained by use of a multi-wavelength bench oximeter (SaO2). Linear regression analysis of the data gives SpO2 = 0.88 SaO2 + 11.2 (r = 0.979, p < 0.001).

Fingers↗

PubMed1985

Use of "bollards" to improve patient access during intensive care.

Permanent floor-mounted "bollards" have been installed in three Intensive Care Areas in the Oxford Teaching Hospitals. Each brings services to one bed and, because access around the head is greatly improved in comparison with the conventional arrangement with the head next to the wall, facilitates both emergency and routine care and improves the safety of the working environment for staff and patients. Differences between the bollards installed in the three units are described and the advantages and disadvantages of each discussed. It is concluded that a bollard should be located to the left of the head of the bed and that it should be about 1100 mm high and 500 mm square. At least two oxygen and vacuum outlets, one air outlet, six electric power sockets and connections for monitoring cables should be provided on the bollard with further power sockets on the adjacent wall. A length of equipment rail mounted across the head of the bed supports the suction equipment required for oral and respiratory tract care and storage space is provided on and below the work surface which is mounted on the wall behind the head of the bed.

Critical Care↗