Hi thanks for asking question. Hepatitis c virus apart from blood can survive in various body secretions.. So here during irrigation NG tube in patient he might contacted with virus.... In such case immediate washing of face and eye done.. If there is erosion over contact area chances of acquiring infection could be there.... Although as compare to blood , gastric secretion having less virus.so less chance. But protective mask , gloves , eye glass wear during any procedure to avoid contamination and infection. If develop any unusual sign or jaundice viral marker study needed. Take care...