Microbiology Essay

This essay has a total of 849 words and 5 pages.

Microbiology

man came into the emergency
ward at one o'clock. His thumb came in an hour later. The surgeon's job: get them back
together. The successful re-attaching of

fingers to hand requires long hours of painstaking work in microsurgery. In the operating
room , the surgeon doesn't stand, but

sits in a chair that supports her body. Her arm is cradled by a pillow. Scalpels are
present as are other standard surgical tools,

but the suture threads are almost invisible, the needle thinner than a human hair. And all
the surgical activity revolves around the

most important instument, the microscope. The surgeon will spend the next few hours
looking through the microscope at broken

blood vessels and nerves and sewing them back together again. The needles are so thin that they have to be held with
needlenosed jeweller's forceps and will sew together nerves that are as wide as the
thickness of a penny. To make such a stitch,

the surgeon's hands will move no more than the width of the folded side of a piece of
paper seen end on! Imagine trying to sew

two pieces of spaghetti together and you'll have some idea of what microsurgery involves.
Twenty-five years ago, this man's

thumb would have been lost. But in the 1960s, surgeon's began using microscopes to sew what previously had been almost
invisible blood vessels and nerves in limbs. Their sewing technique had been developed on
large blood vessels over a half

century earlier but could not be used in microsurgery until the needles and sutures became
small enough. The surgical technique,

still widely used today, had taken the frustrating unreliability out of sewing slippery,
round-ended blood vessels by ingeniously

turning them into triangles. To do this, a cut end of a blood vessel was stitched at three
equidistant points and pulled slightly

apart to give an anchored, triangular shape. This now lent itself to easier, more
dependable stitching and paved the way for

microsurgery where as many as twenty stitches will have to be made in a blood vessel three
Continues for 3 more pages >>




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