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The most common site of hemorrhage is the basal ganglia, which exhibits the obvious neurological deficits. In the present study, we aimed to develop a model of supratentorial intracerebral hemorrhage (ICH) with neurological deficits in piglets (6.0 to 8.8 kg). A pediatric urinary catheter with two passages and one balloon was introduced through a burr hole into the right striatum. All the animals received balloon inflation, which was performed by injecting 2.5 ml saline into the balloon through one passage. Then each piglet in experimental group (n = 18) received an injection of 1.0-ml autologous arterial blood through the other passage over 2 min and maintained for 5 min. Then, additional 1.5-ml blood was injected over 15 min. Piglets in control group (n = 6) received only balloon inflation without blood injection. CT scanning was performed immediately after surgery. A deep hematoma was successfully induced in 16 out of 18 piglets and the hematoma volume was 1.74 +/- 0.22 ml (n = 5) at 24 hours after surgery. All the piglets with hematoma had behavioral deficits (lame or could not walk) at 24 hours. Tissue damages, such as cell swelling, necrosis and demyelization, appeared at 24 hours in the brain tissues, adjacent to the hematoma, and was aggravated at 48 hours and ameliorated at 7 days after hematoma induction. In conclusion, we have established a simple model of supratentorial ICH in piglets with marked neurological deficits, which is suitable for study of the pathophysiology and treatment of ICH.

Establishing A Model of Supratentorial Hemorrhage in the Piglet