Biomedical subjects

H W Carter

Publications and source records attributed to H W Carter.

29 records · Page 2Linked to original sources

PubMed1980

Scanning and light microscopy of the crab louse egg.

The SEM findings of the crab louse egg reveal a complicated aeropyle system within the operculum which is important for gaseous exchange and fluid retention. The SEM correlates with the first light microscope observations in the study of these aeropyle structures. These structures consist of a system of apertures that converge down from a larger opening to a smaller opening. the aeropyles and their adjacent reticulum network can be fractured in order to visualize each of the smaller openings that compose its substructure. The eggs, having been hatched, reveal structures comprising the vitelline membrane: (1) a latch; (2) an ellipsoid with two parallel rows of spikes and (3) an ellipsoid with two parallel rows of pores. The ellipsoid with spikes is the only one of these structures visible in an egg with opened operculum and intact vitelline membrane. The ellipsoid with pores and latch arise from the under surface of the vitelline membrane. The ellipsoid with pores is observed on the inner aspect of the opened egg by tilting the ellipsoid with spikes on the outer aspect of the opened egg. Both ellipsoid structures appear to be attached at the same place but on opposite surfaces of the vitelline membrane. These ellipsoid structures and latch, while covering the developing embryo beneath, appear to be involved in the hatching mechanism itself.

Animals↗

PubMed1980

The "early" ulcerative lesion of Crohn's disease: correlative light- and scanning electron-microscopic studies.

Submucosal edema and lymphectasia have traditionally been considered the earliest recognizable alterations in Crohn's disease. However, a characteristic pattern of ulceration grossly resembling the oral lesions of aphthous stomatitis is believed by others to be the earliest macroscopic lesion. We have studied 50 consecutively accessioned surgical specimens with Crohn's disease in an effort to define more thoroughly the frequency, distribution, and morphology of these "aphthoid" ulcers. The scanning electron microscope (SEM) was used in the study because an understanding of the morphology and evolution of these lesions requires an appreciation of their three-dimensional configuration. Typical "aphthoid" ulcers were identified in 35 of the 50 specimens studied. Grossly the typical ulcerative lesion varies from barely visible up to 3 mm in diameter. They have a characteristic light-microscopic appearance consisting of focal ulceration usually overlying an aggregate of lymphoid tissue. The SEM was helpful in identifying the smallest of these lesions and was especially useful in defining a variety of villous abnormalities in the small bowel mucosa adjacent to the ulcers.

Adolescent↗

PubMed1980

Clinical applications of scanning electron microscopy (SEM) in North America with emphasis on SEM's role in comparative microscopy.

This paper contains an account of the clinical applications of the scanning electron microscope (SEM) in North American based on the available literature and personal experience. The role of SEM's contributions through comparative microscopy is stressed rather than a definitive diagnostic role. (Few tests are definitive) Therefore, situations where the application of SEM has been beneficial in day to day diagnostic problems are cited using the imaging modes of SEM as a format. The role of SEM in studying autopsy material is not discussed. Autopsy material has both strengths and weakness, as well as a special time frame, and is worthy of its own separate discussion.

Diagnostic Techniques and Procedures↗

PubMed1979

Video intercom: O.R. consultation and frozen section with screen display of gross and microscopic findings.

Seldom does the pathologist at Saint Barnabas Medical Center, Livingston, NJ, enter the operating room to consult with the operating surgeon. Instead, consultation takes place via an audio-intercommunication system supplemented by video. In this article, the authors explain how and when the system is used, the equipment needed, and the benefits to be derived by pathology residents.

Education, Medical↗

PubMed1977

Smoker's heart.

Explore the source record for details and available documents.

Coronary Disease↗

PubMed1976

Cigarette smoking and coronary artery disease. A macroscopic and microscopic study.

Vascular changes in the coronary arteries and intramyocardial arteries and arteriole were studied in 1,056 men in relation to the effects of cigarette smoking and to age. The analysis was based on both macroscopic and microscopic studies, and the pathologist was unaware of the identity of the cases. The macroscopic study found a greater association with atheroma than a previous study taken from autopsies. The microscopic study found moderate and advanced fibrous intimal thickening of the coronary arteries to be more frequent in smokers and related to the amount or degree of cigarette smoking. The increase in fibrous intimal thickening was greater for intramyocardial arteries than for subepicardial arteries. The most marked difference by smoking habits was found in the myocardial arterioles. Advanced hyaline thickening was found in 90.7 percent of those smoking two or more packs of cigarettes per day, in 48.4 percent of those smoking less than one pack per day, and not in any of those who never smoked regularly.

Adult↗

PubMed1974