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  • Title: The effects of a thromboxane A2 receptor antagonist on neurologic recovery after 15 min complete global brain ischemia in dogs.
    Author: Takahashi M, Iwatsuki N, Ono K, Tazima T, Koga Y, Hashimoto Y.
    Journal: J Anesth; 1991 Jan; 5(1):73-8. PubMed ID: 15278672.
    Abstract:
    The effects of a thromboxane A(2) receptor antagonist (anti-TXA(2); ONO-3708) on the neurologic recovery after 15 min complete cerebral ischemia were investigated in dogs. Complete cerebral ischemia was achieved by occlusion of the trunk of the aorta, the superior and the inferior caval vein. Seventeen dogs were divided into 2 groups; 1) control group (no drug, n = 9), 2) Anti-TXA(2) group (anti-TXA(2) 200 mcg.kg(-1) in iv bolus soon after recirculation followed by continuous infusion at a rate of 10 mcg.kg(-1).min(-1) for 3 days, n = 8). EEG, auditory brainstem response (ABR), middle latency response (MLR), and somatosensory evoked potential (SEP) recordings were obtained before ischemia, 120 min after re-circulation and on the 7th day after ischemia. The neurologic recovery score (NRS) were determined on the 3rd and the 7th day. Impaired EEG score was significantly higher in the anti-TXA(2) group on 7th day after ischemia ( P < 0.05). Anti-TXA(2) increased the reappearance rates of the ABR-Vth ( P < 0.05) and the SEP-N(3) waves ( P < 0.01) at 120 min after ischemia. The survival rate tended to be higher in the anti-TXA(2) group. However, NRS did not significantly differ in the groups.
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