Hutchinson's pupil is seen in case of cerebral compression. There are 3 stages. Mechanism: The parasympathetic fibers to the pupil are responsible for pupillary constriction. The fibers pass
5% dextrose is a free water solution. Dextrose gets metabolised and plasma osmolality is decreased. This increases the brain oedema in head injury and hence should be avoided.
Pupil characteristics can be used to identify the cause of coma in a patient. It also helps in determining the treatment. The important pupillary signs are given below:
Kussmaul’s sign refers to the inspiratory increase in jugular venous pressure (or central venous pressure) Some sources consider Kussmaul’s sign as the absence of inspiratory fall in jugular
The jugular venous pressure falls during inspiration The mechanism is as follows During inspiration, there is increase in negative intrathoracic pressure This negative pressure is also transmitted into
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