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Korean J Anesthesiol > Volume 27(10); 1994 > Article
Korean Journal of Anesthesiology 1994;27(10):1348-1353.
DOI: https://doi.org/10.4097/kjae.1994.27.10.1348   
Vital sign changes associated with tourniquet use under spinal anesthesia for total knee arthroplasty.
Sang Chul Lee, Jin Ho Bae
Department of Anesthesiology, Seoul National University, College of Medicine, Korea.
Abstract
Tourniquet is usually used for total knee arthroplasty to provide s bloodless surgical field. However, there is a possibility that sustained inflation of tourniquet can cause hypertension, while deflation can cause hypotension. In 31 patients who received total knee artroplasty under spinal anesthesia in Seoul National University Hospital, we examined the changes of systolic blood pressure (SBP) and heart rate (HR) (1) before induction (2) just before inflation of tourniquet, (3) at 10 minutes after inflation of it, and (4) just before deflation of tourniquet. We also checked (5) the maximsl change of SBP and HR within 5 minutes after deflation of it. The results were as follows: 1) As time went, inflation did not bring any remarkable change of SBP and HR. 2) SBP decreased by 19 mmHg (p < 0.05) after release of tourniquet. But HR did not change significantly. In conclusion, it is suggested that we have to pay special attention to the patients who underwent total knee arthroplasty operation under spinal anesthesia, because tourniquet deflation might cause significant lowering of blood pressure.
Key Words: Tourniquet; Spinal anesthesia; Total knee arthroplasty


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