To explore the effects of deliberate hypotension at different levels on cerebral blood flow and definition of surgical fields.
目的观察不同水平控制性降压对鼻内镜手术视野清晰度及脑血流的影响。
Objective: Deliberate hypotension combined with hypervolemic hemodilution is being widely used for blood conservation in surgical patients.
目的：控制性低血压复合血液稀释技术已经广泛应用于外科手术进行血液保护。
Objective: Deliberate hypotension combined with hypervolemic hemodilution is being widely used for blood conservation in surgical patients.
目的：控制性低血压复合血液稀释技术已经广泛应用于外科手术进行血液保护。
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