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Biomedical subjects

T J Poulton

Publications and source records attributed to T J Poulton.

At least 19 recordsLinked to original sources
PubMed1994

Physiologic chest sounds and helicopter engine noise.

To develop an amplification system for physiologic chest sounds during air medical transport in jet helicopters, we compared frequency spectra of physiologic chest sounds and Allison C-28 equipped jet helicopter noise. We found that the frequency spectrum of physiologic chest sounds is contained entirely within that of jet rotocraft noise. Attempts to amplify physiologic chest sounds or to filter jet rotorcraft noise will invariably fail to improve perception of chest sounds. Future research must focus on assessment of actual movement of the chest and of each hemithorax, as well as an carbon dioxide production, as indicators of adequate ventilation and proper endotracheal tube position.

Air Ambulances↗
PubMed1988

ATLS paradigm fails.

Explore the source record for details and available documents.

Blood Pressure Determination↗
PubMed1987

Helicopter cooling of heatstroke victims.

Theoretical and clinical evidence suggests that traditional ice water immersion is not the best therapy for heatstroke. We treated three patients with serious heatstroke using the downdraft from a light utility helicopter to dissipate heat primarily by evaporation and convection. The speed of cooling was substantially better than that reported in prior clinical series.

Adolescent↗
PubMed1987

Physiologic monitoring during civilian air medical transport.

We used a questionnaire to survey the physiologic monitoring practices of 106 civilian helicopter flight programs in the United States. Respondents indicated whether they used specified items of equipment "all the time," "only as needed," or "never." Properly completed questionnaires were received from 94 of the 106 programs. Although basic EKG and blood pressure monitoring were done routinely by all programs, temperature was not measured by over half the programs. Less than 20% of programs are able to monitor systemic or pulmonary arterial pressures invasively during flight. Routine monitoring of the fetus is done only rarely during transport of high-risk obstetrical patients. We conclude that monitoring during air medical transport can be improved by taking better advantage of available technology.

Adult↗
PubMed1987

Medical helicopters: carbon monoxide risk?

Carbon monoxide exposure of medical personnel working beneath the turning rotor of a medical helicopter appeared to cause mild clinical illness. We measured the carbon monoxide levels found in various locations beneath the rotor of a jet helicopter under two different conditions. Carbon monoxide levels ranged from 8-76 ppm depending on location of sampling and speed of operation of the engine. This level of carbon monoxide is potentially a problem, as is the inhalation of jet fuel vapor, when working beneath the rotors of an operating helicopter.

Air Pollutants, Occupational↗
PubMed1986

Does PEEP reduce the incidence of aspiration around endotracheal tubes?

Despite improved endotracheal tube designs, aspiration remains a cause of pulmonary complications. This in vitro study evaluates the efficacy of positive end-expiratory pressure (PEEP) in reducing the incidence of seepage around endotracheal tubes during mechanical (MV) and spontaneous ventilation (SV). Two transparent plastic "tracheas" with cuffed and uncuffed endotracheal tubes simulated adult and paediatric airways respectively. Ten trials without PEEP and ten with PEEP at each of two different levels were completed for each model using both SV and MV. Simulated SV in both models was associated with seepage nearly 100 per cent of the time, regardless of PEEP level. During MV without PEEP, seepage occurred in 55 per cent of the adult trials and 100 per cent of the paediatric trials. In contrast, MV with 5 cmH2O PEEP produced seepage rates of 15 per cent in the adult model and 0 per cent in the paediatric model. Compared to trials without PEEP, seepage occurred less frequently, was reduced in amount and delayed in onset. MV with PEEP significantly (p less than 0.05) decreased the incidence of seepage around endotracheal tubes.

Adult↗