Seroma is known as the accumulation of serum in specific body parts after a person undergoes surgery. The serum can be defined as the clear or yellowish fluid found inside the seroma; it is made up of plasma as well as other cells that come from various blood vessels which become damaged while the surgery is ongoing.It is characterized as a small/ big lump depending on the amount of fluid encased in it.he serum can be defined as the clear or yellowish fluid found inside the seroma; it is made up of plasma as well as other cells that come from various blood vessels which become damaged while the surgery is ongoing. It is characterized as a small/ big lump depending on the amount of fluid encased in it.
To know whether a chair fits, here are a few rules to sit by: 1  Feet should reach the floor. 2  Five chair legs are better than four for added stability. 3  Hips should be the same level or higher than the knees.  Forearms ought to rest easily on the arm 1  rests. Sit completely against the back of the chair. [ source: UCLA Ergonomics]
1 When you sit in the chair the seat pan should be at least one inch wider than your hips and thighs on either side. 2  The seat pan should not be too long for your legs otherwise it will either catch you behind the knees or it will prevent you from leaning fully back against the lumbar support. The seat pan should not be too long for your legs otherwise it will either catch you behind the knees or it will prevent you from leaning fully back against the lumbar support. 2  Most ergonomic chairs have a seat pan with a waterfall front that prevents the seat from catching you behind the knees.