Efeitos da hemorragia subaracnóidea sobre a complacência gástrica em ratos

Abstract

In addition to increase in the intra cranial pressure, subarachnoid hemorrhage (SAH) is responsible for high morbidity grade and high mortality levels. Varied consequences are well documented, though little is known on the impact of SAH on the gastrointestinal tract (GIT). However, we have previously documented that intracranial hypertension reduces gastric compliance (GC), which may hamper enteric nutrition and efficiency of oral administered drugs in affected patients. We studied the effects of SAH on GC. After authorization by the COBEA(CEUA/UFCProtocol n° 41/2013), 130 male Wistar (300-350) rats were anesthetized (Ketamine/Xylazine (20-10 mg/Kg; ip) before being subjected to SAH or Sham protocol. Autologous blood was injected intra-theca, constituting the SAH protocol; while injection of a similar volume (0.2ml) of a líquor-símile fluid formed the Shamprotocol. A brain ventricle was cannulated, to later verify increase in intra-cranial pressure (ICP) during GC experiments, while the femoral artery was utilized to measure simultaneous hemodynamic values: cardiac frequency (CF) and arterial pressure (AP). Another group of animals were operated upon to study the role of the autonomic nervous system in this phenomenon. After 72hs, the animals were anesthesized and submitted to GC measurement protocol; by pletysmography (Ugo Basille®). Simultaneous values of ICP, CF and PA were recorded. Data was compared and analyzed by “t” student test, with values p (where p < 0.05) considered statistically significant.