Microscopic Examination
Microscopic Examination - Related Videos
07:44
Ophthalmoscopic Examination
0 Views •
2023
Source: Richard Glickman-Simon, MD, Assistant Professor, Department of Public Health and Community Medicine, Tufts University School of Medicine, MA The simplest ophthalmoscopes consist of an aperture to look through, a diopter indicator, and a disc for selecting lenses. The ophthalmoscope is primarily used to examine the fundus, or the inner wall of the posterior eye, which consists of the choroid, retina, fovea, macula, optic disc, and retinal vessels (Figure 1). The spherical eyeball...
08:08
Major Components of the Light Microscope
0 Views •
2008
The light microscope is a basic tool for the cell biologist, who should have a thorough understanding of how it works, how it should be aligned for different applications, and how it should be maintained as required to obtain maximum image-forming capacity and resolution. The components of the microscope are described in detail here.
35:03
Mental Status Examination
0 Views •
2023
Source: Carmen Black, Matthew Goldenberg, and Jaideep Talwalkar; Yale School of Medicine The mental status exam is a clinical evaluation of emotional, perceptual, and cognitive functioning that spans both the fields of psychiatry and neurology. Developing skill in the psychiatric portions of the examination are important to describe salient aspects of the patient's mental state that may be observed during routine history and/or physical exam. Proficiency in the cognitive portions of this...
20:06
The Comprehensive Infant Examination
0 Views •
2023
Source: Heather Collette and Jaideep Talwalkar; Yale School of Medicine The newborn exam is important in establishing a baby's baseline health status as they enter the world. Newborn providers have the unique opportunity to evaluate a patient for the very first time. They are also tasked with identifying congenital anomalies that require early intervention to promote a long and healthy life for the child. Many newborn anomalies, such as heart defects, are noted on prenatal ultrasound. However,...
04:57
Proper Care and Cleaning of the Microscope
0 Views •
Cited by 2 •
2008
Keeping the microscope optics clean is important for high-quality imaging. Dust, fingerprints, excess immersion oil, or mounting medium on or in a microscope causes reduction in contrast and resolution. DIC is especially sensitive to contamination and scratches on the lens surfaces. This protocol details the procedure for keeping the microscope clean.
FAQs
Microscopic examination depends on coordinating objective lenses with controlled illumination and, when appropriate, stains. Objective lenses provide magnification, while illumination makes the viewed field visible. Stains add contrast between cellular, tissue, microbial, or other specimen components. Together, these choices determine whether structural differences can be distinguished and assessed consistently.
Stains improve interpretation by creating contrast between components that may otherwise be difficult to distinguish. This contrast can make differences among cells, tissues, microorganisms, or other specimen elements more apparent under magnification. As a result, staining supports closer assessment of structural features when examining specimens for clinically meaningful abnormalities.
Abnormal morphology provides visible structural evidence that can be related to underlying pathology. Changes in the appearance of cells, tissues, microorganisms, or other components may help distinguish ordinary findings from disease-associated changes. Interpreting these features allows clinical microscopy to contribute to diagnostic assessment rather than simply recording that a specimen contains visible material.
The basic workflow begins with collecting the clinical specimen and preparing it on a slide. The prepared slide is then viewed using controlled illumination and selected objective lenses, with stains used when added contrast is needed. Maintaining this sequence connects the original specimen to the structures observed and supports systematic examination.
Different specimen categories provide different kinds of clinically relevant findings. Cell and tissue specimens can show abnormal morphology or disease-associated tissue changes, while blood and urinary specimens can reveal characteristic findings within those materials. Specimens containing microorganisms may support recognition of infectious agents. Thus, the material examined shapes the structural evidence available for interpretation.
Clinical microscopy is used when visible structural findings can inform diagnosis, disease monitoring, or evaluation of treatment response. It may support investigation of abnormal cells, infectious agents, blood findings, urinary findings, and tissue changes associated with disease. Its value comes from linking observed morphology to pathology and following how those findings relate to clinical management over time.