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6.
It is imperative to monitor the ECG signal while passing the negative lead
. The
appropriate location of the solid tip is dictated by the size of the P wave. The P wave will
start out small and grow increasingly larger as it approaches the heart and may become
negative when it is passed too far. The solid tip is in its optimal position when the P wave
is approximately 1/3 the height of the QRS complex. Also ensure the head and forelimbs
are in a relatively neutral position to ensure the ECG signal will remain consistent once the
animal is awake. Once you are satisfied with the signal you can tighten the two caudal
sutures around the vessel containing the lead and tie the tails of the cranial suture around
the lead to further secure it in place.
7. The lead should also be tacked to the surrounding tissue once or twice to minimize
tension and prevent it from being pulled out of the vessel (see Figure 37).
Figure 37. Solid Tip Negative ECG Lead in Place
Surgical Recovery
1. Discontinue surgical anesthesia.
2. Maintain supplemental warmth throughout the anesthetic recovery.
3. Administer post-surgical analgesia.
4. Monitor animal closely for the return of normal postures and behaviors.
This completes the surgery.
