• Guoliang Zhang, Zhenxun Xue, Lixian Xu, and Yun Ju.
• Department of Anaesthesia, College of Stomatology, The Fourth Military Medical University, Xi'an 710032, China.
• Zhonghua Kou Qiang Yi Xue Za Zhi. 2002 Sep 1; 37 (5): 359-60.

ObjectiveTo study the effects of cardiovascular function in dental extraction on hypertensive patients by inhalation 50% nitrous oxide.MethodsThe 30 hypertensive patients were randomly allocated into two groups: A group inhalation the 50% nitrous oxide and oxygen, B group inhalation the air and O(2). To measured the HR, BP, and SpO(2) in dental extraction.ResultsIn a group the changes of blood pressure and heart rate are more smoother than B group. Two groups were significant in HR, BP and SpO(2) (P < 0.01).ConclusionsInhalation with 50% nitrous oxide can keep the stability of cardiovascular system and it is a valid method in dental extraction on hypertensive patients.

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