Peripheral blood smear: Difference between revisions
Jump to navigation
Jump to search
m →Morphologic findings: Despaced |
→Morphologic findings: Organized |
||
| Line 31: | Line 31: | ||
===Morphologic findings=== | ===Morphologic findings=== | ||
Look for poikilocytosis (red blood cells of abnormal shapes) | Look for poikilocytosis (red blood cells of abnormal shapes). These are counted as a percentage of visible red blood cells:<ref name=HongKong/> | ||
These are counted as a percentage of visible red blood cells:<ref name=HongKong/> | |||
{|class=wikitable | {|class=wikitable | ||
|- | |- | ||
| Line 67: | Line 62: | ||
! Burr cells (echinocytes) | ! Burr cells (echinocytes) | ||
| [[File:Micrograph of an echinocyte on a peripheral blood smear.jpg|90px]] | | [[File:Micrograph of an echinocyte on a peripheral blood smear.jpg|90px]] | ||
|1 - 3%||3 - 10%||>10% | |1 - 3% || 3 - 10%|| >10% | ||
|- | |- | ||
! Sickle cells (drepanocytes) | ! Sickle cells (drepanocytes) | ||
| Line 86: | Line 81: | ||
|- | |- | ||
|} | |} | ||
;Burr cells versus spur cells | |||
<gallery mode=packed heights=150> | |||
File:Micrograph of an echinocyte on a peripheral blood smear.jpg|'''Burr cell''' (echinocyte) | |||
File:Human blood film with acanthocytes 02.jpg|'''Spur cell''' (acanthocyte) | |||
</gallery> | |||
Burr cells are distinguished from spur cells by having more equally distributed and rounded projections. They are usually [[Artifacts|artifactual]]. However, they may also be caused by renal insufficiency, so if this is present, a report may include "Occasional/Multiple echinocytes, consistent with renal insufficiency". | |||
;Intraerythrocytic findings | |||
<gallery mode=packed heights=150> | <gallery mode=packed heights=150> | ||
File:Micrograph of a red blood cells with an overlying platelet on a peripheral blood smear.jpg|When seeing what appears to a platelet overlying a red blood cells (as pictured), confirm that there is a halo. | File:Micrograph of a red blood cells with an overlying platelet on a peripheral blood smear.jpg|When seeing what appears to a platelet overlying a red blood cells (as pictured), confirm that there is a halo. | ||