A five year old child is scheduled for strabismus correction. Induction of anaesthesia is uneventful. After conjunctival incision as the surgeon grasps the medial rectus the anaesthesiologist looks at cardiac monitor. Why do you think he did that:
|A||He wanted to check the depth of anaesthesia|
|B||He wanted to be sure that blood pressure did not fall|
|C||He wanted to see if there was oculocardiac reflex|
|D||He wanted to make sure there was no ventricular dysrhythmia which normally accompany incision|
He wanted to see if there was oculocardiac reflex
a. The pressure on extraocular muscles and particularly on medial rectus stimulates parasympathetic overactivity on heart leading to bradycardia, AV blocks and even cardiac arrest may occur.
b. This reflex is called as oculocardiac reflex. Treatment is IV atropine.