Tierärztliche Hochschule Hannover Vergleichende Studie zur

Publikation 2
decreased during surgery, but remained elevated compared to baseline until the end
of the observation period. At the beginning and the end of the surgical period (0 min
and 65 min) mean norepinephrine concentrations of Group INH were significantly
elevated compared to groups INJ and EPI (Table 1).
Table 1 near here
Effects on the cardiopulmonary system
In all calves, the administration of anaesthetics and subsequent positioning into
dorsal recumbency caused an initial significant decrease of HR, SV, CO, MAP, CVP
and BE, whereas SVR, PVR and RR significantly increased in all groups (Tables 2-3;
Fig. 2).
Figure 2 near here
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The surgical procedure itself led to transient decreases in CVP, BE and HCO 3
(Tables 2-3). For these parameters, no significant differences were detected among
the groups and all parameters returned to baseline after surgery. HR and SV were
initially elevated by the operational stimulus before HR successively decreased and
SV successively increased in course of the surgery. In Group INH p a O 2 was
significantly higher whereas body temperature, PAP and PVR were significantly
lower than in groups INJ and EPI (Tables 2-3). Injection anaesthesia led to a
significant decrease in p a O 2 and SaO 2 , and significantly increased values of PAP and
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