Relation between preoperative autonomic function and blood pressure change after tourniquet deflation during total knee replacement arthroplasty Full Text
Korean Journal of Anesthesiology, 02/24/2012
Huh IY et al. – Preoperative low baroreflex sensitivity (BRS) is associated with hypotension after tourniquet deflation, suggesting the importance of baroreflex regulation for intraoperative hemodynamic stability.Methods
- Eighty-six patients who underwent total knee replacement arthroplasty (TKRA) were studied.
- HRV, systolic blood pressure variability (SBPV) and baroreflex sensitivity (BRS) were analyzed.
- The authors assigned two groups depending on the lowest systolic blood pressure (SBP) or mean BP (MBP) after tourniquet release (Group H; SBP <80mmHg or MBP <60mmHg, Group S; SBP >80mmHg and MBP >60mmHg).
- Fifteen patients developed severe hypotension and ten patients were treated with ephedrine.
- Of the parameters of HRV, SBPV, and BRS, only BRSSEQ was significant being low in Group H.
- BRS and high-frequency SBPV were correlated with the degree of MBP change after tourniquet deflation.