Biomedical subjects

G M McCormick

Publications and source records attributed to G M McCormick.

13 recordsLinked to original sources

PubMed1992

Major vascular injuries of the torso.

We reviewed autopsy data from 802 trauma deaths in northwestern Louisiana from January 1983 to March 1988 and found that 18% of all such deaths involved noncardiac major vascular injuries of the torso. Ninety-four percent of all deaths from blunt trauma and 45% of all deaths from penetrating trauma involved injury to the aorta, either thoracic or abdominal. Injuries to the thoracic aorta accounted for 11% of all trauma-related deaths in northwestern Louisiana; 68% of all victims died at the scene of the trauma. During this period 57 patients with noncardiac major vascular injuries of the torso were treated at the LSU-Shreveport Medical Center. Fifteen (26%) of these patients were transported to LSU-SMC from neighboring rural parishes outside the Shreveport-Bossier City metropolitan area. The mortality was 37%, and there was no difference in survival between those patients transported to LSU-SMC from within the Shreveport-Bossier City area and those transported from the rural parishes. Multivariate analysis of data showed that survival was determined by the complexity of the injury, the patient's ability to reach the hospital, and the stability of the patient's condition on arrival at the hospital. Transport time did not appear to affect survival.

Adult↗

PubMed1992

Toxic peripheral neuropathy with demyelination in Sprague-Dawley rats given CGS 21595--a 5-lipoxygenase inhibitor.

Male and female Sprague-Dawley rats were given CGS 21595, a pro-drug that is almost immediately metabolized to CGS 19213, a naphthoquinone that acts as a 5-lipoxygenase inhibitor. The compound was administered by gavage to five groups of Sprague-Dawley rats (group Nos. 1, 5, n = 30; group Nos. 2-4, n = 20) at daily doses of 0, 50, 150, 500, or 1,000 mg/kg for 13 weeks. Rats in the higher dose groups had a reduced weight gain, but significant neurologic signs were not observed. A peripheral neuropathy consisting predominantly of myelin destruction in the spinal nerve roots and sciatic nerves in male rats treated with greater than or equal to 150 mg/kg CGS 21595 and in female rats treated with greater than or equal to 50 mg/kg CGS 21595 for 13 weeks. This lesion was not fully reversible after a recovery period of 4 weeks. Lesions consisted of ballooning of myelin sheaths, infiltration by macrophages, demyelination, and occasional areas of remyelination. Axons were generally preserved, and the brain and spinal cord were not affected. Male and female rats in all treatment groups had cytoplasmic hyaline droplets in the proximal renal tubules. This change was reversible after 4 weeks and was not associated with any other adverse effects on the kidney.

1-Naphthylamine↗

PubMed1990

Isometric features of orthostatic tremor: an electromyographic analysis.

A patient is described with "orthostatic" tremor. Electromyography revealed tremor bursts of 15 Hz in the lower extremities while standing and with isometric activation of the muscles, but the bursts disappeared with isotonic activation of muscles. Similar tremor was recorded in the arms with isometric, but not isotonic activation. Review of previously reported cases confirms these findings. The clinical and electrophysiologic features of this tremor distinguish it from other recognized forms of tremor.

Aged↗

PubMed1989

Vaginal "fisting" as a cause of death.

We describe the death of a young girl that resulted from the insertion of a clenched hand and forearm into her vagina during heterosexual activity. (The male homosexual practice of rectal fist insertion has been described previously.) We believe this death to be the first reported case of a "fisting" death due to vaginal fist insertion during heterosexual activity. This death is reported to alert forensic pathologists, medicolegal death investigators, and coroners aware of the role of aberrant sexual activity and its potential to cause death.

Adolescent↗

PubMed1988

A burning issue. The Japanese "fire basin".

This article presents two deaths due to acute carbon monoxide poisoning that occurred when charcoal-burning hibachis were used as heating sources in enclosed camping facilities. In both deaths, the levels of blood carbon monoxide saturation were at or slightly below the expected lethal level. Coronary arteriosclerosis may have contributed to one death, while oxygen depletion may have been a contributing factor in the other. These cases illustrate the danger of using such heating sources in enclosed spaces, due to their carbon monoxide-generating capability. We suggest that suitable warnings be placed on the hibachis themselves.

Burns, Inhalation↗

PubMed1988

An unusual case of child abuse homicide/suicide.

This case report examines a child abuse homicide in which the perpetrator committed suicide a few hours after the infant's death. At the time of the perpetrator's suicide he was not under investigation, nor was he a suspect in the death of the child. Although the literature does not contain reports of similar cases, we are sure they exist. This report raises the question of the degree of social stigma attached to the accusation of child abuse. It also serves as a warning to those who must deal with the potentially suicidal child abuser.

Adult↗

PubMed1979

Alpha1-antitrypsin quantitation and Pi typing of stored postmortem blood.

Correlation of necropsy findings with protease inhibitor levels and phenotype is sometimes desirable. This study was designed to determine the feasibility of postmortem protease inhibitor assessment. One hundred fifteen consecutive postmortem samples, stored at -20 C for 24 to 53 months, were analyzed. The time from death to necropsy, storage time, and the pH values of the sera were correlated with alpha1-antitrypsin levels, trypsin inhibitory capacity, and Pi typability. The alpha1-antrypsin level and trypsin inhibitory capacity were not significantly correlated with morgue time, serum storage time, or pH, and mean values were within the expected ranges. A significant decrease in Pi typability occurred when pH was less than 7.0. Moreover, while most (86%) of the sera stored for 2 to 2 1/2 years were typable, only 30% of those stored for more than four years were typable. Determination of alpha1-antitrypsin and trypsin inhibitory capacity are possible with the use of stored postmortem blood. Pi typing is usually possible, provided sera are not acidic and are examined within 2 1/2 years.

Female↗

PubMed1974