Why is a feathered edge important?

Why is a feathered edge important?

This feathered edge provides winter and escape cover for many wildlife species. Edge Feathering from the side: Showing a gradual transition from field to woods. Edge Feathering from above: Showing a crop field edge, grasses, shrubs, small trees and mature timber. There are two major ways to “get an edge.”

What kind of edge is needed for a smear?

Look at the slide and grossly check the smear, making sure it has two edges: These two edges include the feathered edge (a thin portion) and the thick edge (a base). Approximately two-thirds to three-fourths of the slide length should be covered by the smear with no irregularities, streaks, or holes.

What makes a good blood smear?

An optimal smear is three-quarters the length of the slide and has a feathered edge. Leave the slide to air dry and make more smears if required. Pack smears individually into slide holders.

What are the three methods of preparing a blood smear?

Four different types of smear preparation methods (conventional method, blood film method, drop and rest method, and water-wash method) were carried out according to the standard reference as described below.

What is the feathered edge of a blood smear?

The feathered edge This is the end of the blood smear and should be completely present and fully stained (a smear that is “too long” will lack a feathered edge). This should be the first part of the smear that is examined at low power to detect platelet clumps and microfilaria, but should be avoided when evaluating blood cells at higher power.

What should the end of a blood smear look like?

This is the end of the blood smear and should be completely present and fully stained (a smear that is “too long” will lack a feathered edge). This should be the first part of the smear that is examined at low power to detect platelet clumps and microfilaria, but should be avoided when evaluating blood cells at higher power.

What causes a rainbow effect on a blood smear?

Prior to staining, if the slide is held up to the light, there is a rainbow effect seen just behind the feathered edge on well made smears. Poor quality slides are typically cause by excessive downward pressure, a slow spreading motion, or wobbling of the spreader slide on the surface of the smear.

What is the principle of a blood smear?

Principle: The Clinical Pathology Laboratory uses the wedge technique for preparation of blood smears. This method produces a gradual decrease in thickness of the blood from thick to thin ends with the smear terminating in a feathered edge approximately 2 mm long.

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