Fluid preloading before beach chair positioning for arthroscopic shoulder procedures: a randomized controlled trial

Abstract Background and objectives The Beach Chair Position (BCP) has many advantages such as less neurovascular injury and better intra-articular visualization, but it has also negative consequences, including hemodynamic instability. Although maintaining normal Mean Arterial Pressure (MAP) is important, fluid management is also a crucial concept for hemodynamic stability. The main objective of this study is whether preloading before positioning would be effective for less hemodynamic instability. Methods This randomized, controlled study was conducted in a single center in the Istanbul University, Istanbul Faculty of Medicine. Forty-nine patients undergoing elective arthroscopic surgery in the BCP were recruited. In the study group, crystalloid fluid at 10 mL.kg-1 of ideal body weight was administered intravenously 30 min before the BCP for preloading. The primary outcome measures were differences of hemodynamic variables as MAP, Stroke Volume (SV), Heart Rate (HR), and Cardiac Output (CO). The secondary outcome measures were Postoperative Nausea and Vomiting (PONV) rates in postoperative first day, surgical satisfaction scale, total ephedrine dose used during surgery, and total amount of fluid. Results The MAP, CO, and SV measurements of the study group were higher than those of the control group in the 5th minute after the BCP (respectively, p= 0.001, p= 0.016, p= 0.01). The total amount of crystalloid and surgical satisfaction scales were higher in the study group (respectively, p= 0.016, p= 0.001). Total amount of colloid and ephedrine dose used in the intraoperative period, and PONV rates were lower in the study group (p= 0.003, p= 0.018, p= 0.019, respectively). Conclusion Consequently, preloading can be favorable approach to preserve hemodynamic stability.

Two-year experience with cell salvage in total hip arthroplasty / Dois anos de experiência com recuperação intraoperatória de sangue em artroplastia total do quadril

ABSTRACT BACKGROUND AND OBJECTIVE: The aim of this study was to determine the efficacy of the cell salvage system in total hip arthroplasty surgeries and whether the cell salvage system can reduce the allogeneic blood transfusion requirement in total hip arthroplasty patients. METHODS: We reviewed retrospectively the medical records of patients who underwent hip arthroplasty surgeries between 2010 and 2012 in a university hospital. A total of 181 arthroplasty patients were enrolled in our study. RESULTS: In the cell salvage group, the mean perioperative rate of allogeneic blood transfusion was significantly lower (92.53 ± 111.88 mL) than that in the control group (170.14 ± 116.79 mL; p < 0.001). When the mean postoperative transfusion rates were compared, the cell salvage group had lower values (125.37 ± 193.33 mL) than the control group (152.22 ± 208.37 mL), although the difference was not statistically significant. The number of patients receiving allogeneic blood transfusion in the CS group (n = 29; 43.2%) was also significantly lower than control group (n = 56; 73.6%; p < 0.05). In the logistic regression analysis, perioperative amount of transfusion, odds ratio (OR) -4.257 (95% CI -0.502 to 0.184) and operation time, OR: 2.720 (95% CI 0.001-0.004) were independent risk factors for the usage of cell salvage system. CONCLUSION: Cell salvage is an effective strategy for reducing the need for allogeneic blood transfusion in the perioperative setting; it provides support to patient blood management interventions. Thus, we recommend the cell salvage system for use in total hip arthroplasty surgeries to reduce the need for allogeneic blood transfusion, if possible.

RESUMO JUSTIFICATIVA E OBJETIVO: Determinar a eficácia do sistema de recuperação intraoperatória de sangue em artroplastia total de quadril e se o sistema de recuperação intraoperatória de sangue pode reduzir a necessidade de transfusão de sangue alogênico em pacientes submetidos à artroplastia total de quadril. MÉTODOS: Análise retrospectiva dos prontuários de pacientes submetidos a cirurgias de artroplastia de quadril entre 2010 e 2012 em um hospital universitário. Foram inscritos no estudo 181 pacientes submetidos à artroplastia. RESULTADOS: A média da taxa de transfusão de sangue alogênico no período perioperatório foi significativamente inferior no grupo de recuperação intraoperatória de sangue (92,53 ± 111,88 mL) do que no grupo controle (170,14 ± 116,79 mL; p < 0,001). Quando as médias das taxas de transfusão no pós-operatório foram comparadas, o grupo de recuperação intraoperatória de sangue apresentou valores inferiores (125,37 ± 193,33 mL) aos do grupo controle (152,22 ± 208,37 mL), embora a diferença não tenha sido estatisticamente significativa. O número de pacientes que recebeu transfusão de sangue alogênico no grupo RC (n = 29; 43,2%) também foi significativamente inferior ao do grupo controle (n = 56; 73,6%; p < 0,05). Na análise de regressão logística, a quantidade de transfusão no período perioperatório, a razão de chance (OR) -4,257 (95% CI -0,502-0,184) e o tempo cirúrgico OR: 2,720 (IC 95% 0,001-0,004) foram fatores de risco independentes para o uso de sistema de recuperação intraoperatória de sangue. CONCLUSÃO: A recuperação intraoperatória de sangue é uma estratégia eficaz para reduzir a necessidade de transfusão de sangue alogênico no período perioperatório, que auxilia no manejo sanguíneo durante as intervenções. Portanto, recomendamos o sistema de recuperação intraoperatória de sangue para uso em artroplastia total de quadril para diminuir a necessidade de transfusão de sangue alogênico, quando possível.