The shunts usually employed with the drum relay (referred to above) have each a resistance of about 30 ohms and an inductance of 20, 30 and 40 henrys respectively.
I've been racing for 19 years and I've had mild concussion from previous shunts and going off the track.
In contrast to congenital portosystemic shunts, a number of vessels are usually affected.
However when dealing with patients who have decompression illness or migraine, large pulmonary shunts are numerically more important.
The spark coil has a resistance about ten times as great as that of the electromagnet it shunts, and the wire of which it is composed is double wound so as to have no retarding effect on the induced current, which circulates through the spark coil instead of jumping in the form of a spark across the contact points.
