Biomedical subjects

Christopher DeWitt

Publications and source records attributed to Christopher DeWitt.

3 recordsLinked to original sources

PubMed2004

Botanical solvents.

Botanical, or plant-derived, solvents such as turpentine, pine oils, and various essential oils are used as environmentally acceptable alternatives to traditional solvents and degreasing agents. This article focuses on three lesser-known botanical solvents: limonene, oleic acid, and linoleic acid. Although data are limited, limonene, linoleic acid, and oleic acid are likely of low toxicity. Mild skin irritation may occur from exposure to these compounds, and oxidation products of limonene may produce dermal sensitization. Limonene, and possibly linoleic and oleic acids, may have irritative and bronchoconstrictive airway effects; however, data are scant and more studies are required.

Cyclohexenes↗

PubMed2004

Miscellaneous hydrocarbon solvents.

The solvents discussed in this article are common solvents not categorized as halogenated, aromatic, or botanical. The solvents discussed are categorized into two groups: hydrocarbon mixtures and single agents. The hydrocarbon mixtures discussed are Stoddard solvent, naphtha, and kerosene. The remaining solvents described are n-hexane, methyl n-butyl ketone, dimethylformamide, dimethyl sulfoxide, and butyl mercaptans. Effects common to this group of agents and their unique effects are characterized. Treatment of exposures and toxic effects of these solvents is described, and physiochemical properties and occupational exposure levels are listed.

Alkanes↗

PubMed2002

Interstitial pregnancy: a potential for misdiagnosis of ectopic pregnancy with emergency department ultrasonography.

Interstitial pregnancy is a rare and dangerous form of ectopic pregnancy that can be mistaken for a normal intrauterine pregnancy on ultrasonography, leading to catastrophic results. Increasingly, emergency physicians are using ultrasonography to diagnose intrauterine pregnancy. Emergency physicians should be aware of the potential for mistaking an interstitial pregnancy for an intrauterine pregnancy. We present a case report of an interstitial pregnancy misdiagnosed as an intrauterine pregnancy and discuss ultrasonographic and physical examination findings to help differentiate interstitial pregnancy from an intrauterine pregnancy.

Adult↗