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Biomedical subjects

T Hicks

Publications and source records attributed to T Hicks.

25 records · Page 2Linked to original sources
PubMed1975

Vascular spider: a cutaneous manifestation of hyperdynamic blood flow in hepatic cirrhosis.

Arteriography and gas analysis of blood aspirated from a vascular spider in a patient with hepatic cirrhosis were done before excision and histologic examination of the lesion. This study supports earlier work suggesting that a spider angioma is a cutaneous manifestation of a generalized hyperdynamic circulation in hepatic cirrhosis. Moreover, based upon a variety of experimental and clinical observations on the splanchnic circulation in cirrhosis, it is suggested that the portal hypertension blood flow encounters the obstacle posed by the scarred liver ("active congestion").

Arm↗
PubMed1973

The influence of secretin on ion transport in the human jejunum.

Using a triple-lumen tube perfusion technique in normal human subjects secretin (2U/kg/hour intravenously) was shown to reduce the absorption of sodium, potassium, and chloride in the most proximal 30 cm of jejunum but it had no effect on bicarbonate absorption. This effect was not due to an artefact produced by the entry of secretin-stimulated, bicarbonate-rich, pancreatic juice into the test segment. Absorption of sodium chloride and water was stimulated rather than inhibited by higher bicarbonate concentrations and the effect of secretin was obvious even when this factor was controlled by adjusting the bicarbonate concentrations of the test fluids. Secretin did not influence ion transport in the mid-jejunum. It is suggested that the effects described may indicate a physiological role for secretin in the intestine where it could prevent the too rapid dehydration of upper jejunal contents which might interfere with adequate mixing and digestion.

Adolescent↗
PubMedDate not supplied

A model for estimating the number of glass fragments transferred when breaking a pane: experiments with firearms and hammer.

Numerous publications have shown the importance of transfer in the interpretation of glass evidence. As this phenomenon is also highly variable, it was decided to test the hypothesis that there exists a means to predict the number of fragments recovered at time t = 0. Panes of float glass-of different types and thickness-were broken using either a firearm or a hammer. It was decided to choose a firearm as the main breaking device, as it allowed not only to have more reproducible conditions but also to acquire knowledge in a field where little has been published. Despite the inherent variation in the breaking process, the results show that using a statistical model it is possible to predict the number of fragments transferred onto a garment from the number of fragments transferred to the ground. This research also indicates the size and number of particles transferred onto a person, when breaking window panes of different types (float, laminated or toughened) with different breaking procedures.

Journal Article↗
PubMedDate not supplied

Assessing transfer probabilities in a Bayesian interpretation of forensic glass evidence.

When someone breaks glass a number of tiny fragments may be transferred to that person. If the glass is broken in the commission of a crime then these fragments may be used as evidence. A Bayesian interpretation of this evidence relies on the forensic scientist's ability to assess the probability of transfer. This paper examines the problem of assessing this probability and suggests some solutions.

Bayes Theorem↗