Primary epithelioid angiosarcoma originating from the mandibular gingiva: a case report of an extremely rare oral lesion.

Background: Angiosarcoma occurs very rarely in the oral cavity, and the epithelioid type is even rarer. Here, we report a rare case involving an elderly man with a primary epithelioid angiosarcoma that originated from the mandibular gingiva and resembled a dentigerous cyst on radiographs.

Case Presentation: A 66-year-old Japanese man visited our hospital with a chief complaint of gingival swelling in right mandibular third molar region.

[Intraoperative coronary spasm in patients without a history of anginal chest pain].

We report three cases of intraoperative coronary spasm that developed during non-cardiac surgical procedures. None of the patients had a history of anginal chest pain. The presumed contributing factors were: 1) suction of the trachea during general anesthesia, 2) hyperventilation and hypotension during induction of general anesthesia, and 3) hyperventilation during neuroanesthesia.

Corticotropin-releasing factor mediates the antinociceptive action of nitrous oxide in rats.

Background: Exposure to nitrous oxide activates brainstem noradrenergic nuclei and descending inhibitory pathways, which produce the acute antinociceptive action of nitrous oxide. Because corticotropin-releasing factor (CRF) can produce activation of noradrenergic neurons in the locus ceruleus, the authors sought to determine whether it might be responsible for the antinociceptive action of nitrous oxide.

Methods: Male Sprague-Dawley rats (250-300 g) were exposed for 60 min to room air or 25, 50 or 70% nitrous oxide in oxygen.

[The effect of intrathecal fentanyl added to hyperbaric bupivacaine for caesarean section].

Background: Management of cesarean section with spinal anesthesia is often accompanied with intraoperative nausea and pain. In a randomized controlled study, we explored the effect of intrathecal fentanyl on the characteristics of subarachnoid block in patients undergoing cesarean section.

Methods: Twenty-four healthy parturients scheduled for elective Cesarean section were allocated to receive either fentanyl 0.

[Marked reduction of life-threatening ventricular tachyarrhythmias in a critically ill patient by intravenous administration of magnesium sulfate].

A 90-year-old man with ischemic heart disease underwent an emergent operation for a ruptured abdominal aortic aneurysm. The patient was brought to the operating room in a state of hypovolemic shock, and developed myocardial ischemia and intractable ventricular arrhythmias during the operation. Intensive cardiopulmonary resuscitation including rapid transfusion, external cardiac massage, electrical defibrillation, and extensive use of cardiovascular drugs restored hemodynamic stability temporarily.