Influence of sitting position on pulmonary hemodynamics and intrapulmonary shunt in neurosurgery
- VernacularTitle:坐位全身麻醉对肺血液动力及肺内分流的影响
- Author:
Weixian ZHAO
;
Zhifang ZHANG
;
Rong LIU
- Publication Type:Journal Article
- Keywords:
Anesthesia,generalBrain;
Surgery;
Sitting position;
Intrapulmonary shunt
- From:
Chinese Journal of Anesthesiology
1994;0(05):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the effects of sitting position on pulmonary hemodynamics and intrapulmonary shunt (Qs/Qt) during neurosurgery. Methods Twenty eight patients scheduled for posterior fossa and posterior cervical spinal surgery, were anesthetized with sevoflurane fentanyl pancuronium or enflurane fentanyl pancuronium after intravenous induction. Pulmonary hemodynamics were monitored with Swan Ganz catheter technique and Qs/Qt was calculated from the data of arterial and mixture venous blood gas analysis, including the following parameters: CI, RAP, MPAP, PCWP, PVRI, pHa, PaCO 2, PaO 2, PaO 2/FiO 2 and Qs/Qt. The detection time points were as the follow: before anesthesia induction, before sitting position, immediately ,60 min and 120min after sitting position, and at the supine position after termination of surgery.Results After induction of anesthesia and during operation at sitting position, CI decreased significantly (P0.05).Conclusions During neurosurgical procedure under general anesthesia and sitting position, pulmonary vascular auto regulation can be preserved and pulmonary oxygenation can be kept in normal.
