Hepatic artery embolization hepatic artery. The percutaneous Seldinger technique introduces a catheter, which is a thin flexible tube made of medical grade material, into the hepatic artery under radiological control. This approach was developed for metastatic neuroendocrine tumors in the early 1970s. Tumor cells get over 90% of their nutrients from the hepatic artery, while the normal cells of the liver get about 70-80 percent of their nutrients and 50% their oxygen supply from the portal vein, and thus can survive with the hepatic artery effectively blocked. Once the catheter is carefully placed in the artery or in a selected branch, the blood
Convention Relating to the Status of Refugees Cultural Rights, but no one has ever done so in regard to violations of the Convention. Nations may levy international sanctions against violators, but no nation has ever done this. At present, the only real consequences of violation are 1) public shaming in the press, and 2) verbal condemnation of the violator by the UN and by other nations. To date these have not proven to be significant deterrents. Convention Relating to the Status of Refugees The Convention Relating to the Status of Refugees, also known as the 1951 Refugee Convention, is a United Nations multilateral treaty that defines who