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Biomedical subjects

J M Colin

Publications and source records attributed to J M Colin.

13 recordsLinked to original sources

Voices of hope. Hearing and caring for Haitian adolescents.

Although much research has been conducted on the effects of migration on the psychosocial evolution of various ethnic groups, only limited information exists about the meaning of migration for Haitian adolescents. Haitian adolescents, in addition to experiencing the trials of adolescence, often feel a sense of loss and confusion when they are forced to leave their homeland. This phenomenological study focuses on the experience of being a Haitian adolescent living in South Florida. Six Haitian adolescents were both interviewed and asked to produce writing about their experiences and perception of self-identity. Their responses evaluated in light of Piaget, Erickson, and Sullivan illustrated eight themes defining the adolescents' senses of identity: pride, isolation, prejudice, parental strictness, nostalgia, belonging, familism, and career vision. The insights acquired through this study have practical applications in designing more effective caring strategies, in advocating for clients, and in delivering culturally competent holistic nursing care.

Adaptation, Psychological↗

[A new hemodynamic endothelial approach using non-invasive evaluation of instantaneous wall shear in human arteries. Application in arterial hypertension].

A new non-invasive methodology of measurement of pulsatile wall shear in superficial large arteries in man is presented from simple determinations of internal diameter of large artery and centerline instantaneous blood velocity (pulsed Doppler apparatus) and asymptotic blood viscosity (coaxial cylinder viscometer). Pulsatile distribution of velocity across the arterial lumen has been represented by a Womersley model enabling to define and calculate wall shear rate as the slope at the wall to the velocity profile at each cardiac time. These complex mathematical calculations have been performed on micro-computer by means of appropriate programmation according to the following steps (1) Digitization and processing of instantaneous centerline blood velocity (2) Decomposition of velocity signal into Fourier series as a sum of elementary velocity sinusoids of increasing frequency (3) computation of velocity profile and slope at the wall to the profile for each harmonic (4) Resynthetization of instantaneous wall shear rate as function in time (5) calculation of wall shear stress by multiplying wall shear rate by blood viscosity. Taking the brachial artery as model of peripheral large artery, pulsatile wall shear rate and stress curves were determined in individual subjects and analysed by means of several characteristic indices including: maximum, minimum and mean values; time of systolic increase and time of systolic relaxation; and oscillating index defined from the positive and negative surfaces of the shear curve. This original methodology open new way for studying hemodynamical conditions at the interface between blood and endothelium surface of large arteries and might be applied to the physiopharmacological approach of vascular disease such as hypertension.

Adult↗

[Infections in surgery under extracorporeal circulation. Results of 3 years of antibioprophylaxis].

The present study was designed to evaluate perioperative antibio-therapy with cefamandol for the prevention of post-operative infections after surgery under cardiopulmonary bypass. 1 300 patients were studied. The incidence for wound infections was 1.3%, 0.9% for systemic, 1.3% for other infections. These results show a decrease in the frequency of infections in comparison with data from the literature.

Adult↗

[Cardiac arrest].

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Heart Arrest↗