Proses pewarnaan hematoksilin eosin dengan automated stainer

Introduction

This tutorial will guide you through the process of hematoxylin and eosin (HE) staining using an automated stainer. HE staining is crucial in anatomical pathology for visualizing tissue structures under a microscope. By following these steps, you can achieve consistent and high-quality staining results efficiently.

Step 1: Prepare the Tissue Samples

• Fixation: Ensure that your tissue samples are properly fixed in formalin to preserve cellular structure.
• Dehydration: Gradually dehydrate the samples using increasing concentrations of ethanol (e.g., 70%, 80%, 95%, and 100%).
• Clearing: Replace the ethanol with a clearing agent like xylene to prepare samples for embedding in paraffin.

Step 2: Embed the Samples in Paraffin

• Infiltration: Immerse the dehydrated and cleared samples in molten paraffin at 60°C for several hours to ensure complete infiltration.
• Embedding: Place samples in molds filled with paraffin and allow them to cool and solidify.

Step 3: Section the Paraffin Blocks

• Microtome Use: Use a microtome to cut thin sections (about 4-5 micrometers) from the paraffin blocks.
• Mounting: Place the sections on glass slides for staining.

Step 4: Set Up the Automated Stainer

• Loading the Slides: Arrange the prepared slides in the designated holders of the automated stainer, ensuring they are secure.
• Program Selection: Choose the appropriate staining protocol for hematoxylin and eosin on the automated stainer.

Step 5: Staining Process

• Hematoxylin Staining:
  • The automated stainer will immerse the slides in hematoxylin solution for a specified duration.
  • Rinse the slides with running water to remove excess dye.
• Eosin Staining:
  • Next, the slides will be subjected to eosin solution for contrast staining.
  • Rinse again to eliminate excess eosin.

Step 6: Dehydration and Clearing

• Ethanol Series: Pass the slides through decreasing concentrations of ethanol (70%, 80%, 95%) followed by 100% ethanol to remove water.
• Xylene Treatment: Finally, clear the slides in xylene to prepare them for mounting.

Step 7: Mounting the Slides

• Mounting Medium: Apply a mounting medium over the tissue sections and cover with a coverslip.
• Setting Time: Allow the slides to set for the recommended time to ensure proper adhesion.

Conclusion

Hematoxylin and eosin staining using an automated stainer streamlines the process of preparing tissue samples for microscopic examination. By following these steps, you can ensure high-quality staining that enhances the visualization of cellular structures. For best results, always adhere to laboratory protocols and maintain equipment properly. Consider practicing manual staining techniques to gain a deeper understanding of the process.