Tuesday, December 20, 2011

BURNS 5


RADIATION BURNS

Injury caused by exposure to ionizing radiation may be limited to
the  skin  but often is deep.

Because these wounds  do  not  heal well,  care  must  be taken to avoid  additional  damage  of  the tissue.

The vasculitis that is associated with these injuries  is usually a lifelong problem.

2.1 PATHOLOGY
The   area   subjected   to   heat   shows   cellular   swelling,
disintegrative  necrosis or coagulative necrosis  depending  upon
the degree of heat it has been subjected to.
- The  application  of  heat  to  the  body  tissues  results  in
  denaturing of proteins.
- It also results in inactivation of enzyme systems.
- It has been shown that oxygen consumption of skin is decreased. 
- There is also decrease in glucose utilization.
- These  process  are  depressed  in  direct  proportion  to  the
  increase in heat.

The  maximum  injury would be inflicted at the point  of  contact
(Fig.Above) and varying grades of injury would be inflicted towards
the periphery of this point of contact.

This  gradation effect would also be observable from the  surface
of  the skin to its depth.

The depth of burns is also related  to the temperature of the heated object and the period for which  it remains  in  contact  with the skin(deeper burns  will  occur  in unconcious  patients

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