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Analytical scanning electron microscopy and x-ray microdiffractometry of renal calculi using etched plastic sections
Scanning Electron Microscopy
|January 1, 1981
Summary
This study introduces a new method for analyzing kidney stones using scanning electron microscopy and X-ray microdiffractometry. The technique precisely identifies crystalline components like calcium apatite and struvite in renal calculi.
Area of Science:
- Geochemistry
- Materials Science
- Analytical Chemistry
Background:
- Renal calculi (kidney stones) are complex formations with diverse crystalline and amorphous components.
- Accurate identification of stone composition is crucial for understanding their formation and developing effective treatments.
- Current analytical methods may have limitations in precisely characterizing all constituents within a single sample.
Purpose of the Study:
- To present a novel correlative analytical technique for detailed renal calculi analysis.
- To demonstrate the capability of identifying specific crystalline constituents, including calcium apatite and magnesium ammonium phosphate hexahydrate (struvite).
- To enable the detection and mapping of both crystalline and amorphous materials within kidney stone sections.
Main Methods:
- Utilizing correlative analytical scanning electron microscopy (SEM) and X-ray microdiffractometry (XRD) on the same 100 micrometer Spurr-embedded sections.
- Employing an extremely sensitive X-ray microdiffractometer for detailed crystallographic analysis.
- Pretreating sections with a sodium ethoxide etching solution to enhance morphological analysis and mineral identification.
Main Results:
- The combined SEM and XRD technique allows for precise identification of crystalline components in renal calculi.
- Specific identification of calcium apatite and magnesium ammonium phosphate hexahydrate (struvite) was achieved.
- The method successfully detected and mapped both crystalline and amorphous constituents within the analyzed kidney stone samples.
Conclusions:
- The described correlative analytical SEM and XRD technique provides enhanced precision in renal calculi analysis.
- This method offers improved identification of key crystalline components, aiding in the understanding of stone etiology.
- The technique's ability to map diverse constituents facilitates comprehensive characterization of renal calculi.