scholarly journals Effects of acute normovolemic hemodilution on post‐cardiopulmonary bypass coagulation tests and allogeneic blood transfusion in thoracic aortic repair surgery: An observational cohort study

2021 ◽  
Vol 36 (11) ◽  
pp. 4075-4082
Author(s):  
Domagoj Mladinov ◽  
Kyle W. Eudailey ◽  
Luz A. Padilla ◽  
Joseph B. Norman ◽  
Benjamin Leahy ◽  
...  
Keyword(s):  
Cohort Study ◽  
Cardiopulmonary Bypass ◽  
Blood Transfusion ◽  
Observational Cohort Study ◽  
Allogeneic Blood ◽  
Acute Normovolemic Hemodilution ◽  
Coagulation Tests ◽  
Observational Cohort ◽  
Normovolemic Hemodilution ◽  
Post Cardiopulmonary Bypass

scholarly journals Effects of Acute Normovolemic Hemodilution on Post-Cardiopulmonary Bypass Coagulation Tests and Allogeneic Blood Transfusion in Thoracic Aortic Repair Surgery: An Observational Cohort Study

2021 ◽  
Author(s):  
Domagoj Mladinov ◽  
Kyle W Eudailey ◽  
Luz A Padilla ◽  
Joseph B Norman ◽  
Benjamin Leahy ◽  
...  
Keyword(s):  
Cohort Study ◽  
Blood Transfusion ◽  
Observational Cohort Study ◽  
Conservation Strategy ◽  
Control Group ◽  
Blood Conservation ◽  
Acute Normovolemic Hemodilution ◽  
Coagulation Tests ◽  
Observational Cohort ◽  
Normovolemic Hemodilution

Background and Aim: Perioperative blood transfusion is associated with increased morbidity and mortality. Acute normovolemic hemodilution (ANH) is a blood conservation strategy associated with variable success, and rarely studied in more complex cardiac procedures. The study aim was to evaluate whether acute ANH improves coagulopathy and reduces blood transfusions in thoracic aortic surgeries. Methods: Single-center observational cohort study comparing ANH and standard institutional practice in patients who underwent thoracic aortic repair from 2019 to 2021. Results: 89 patients underwent ANH and 116 standard practice. There were no significant differences between the groups in terms of demographic or major perioperative characteristics. In the ANH group coagulation tests before and after transfusion of autologous blood showed decreased INR and increased platelets, fibrinogen, all with p<0.0005. Coagulation results in the ANH and control groups were not statistically different. The average number of transfused allogeneic products per patient was lower in the ANH vs control group: FFP 1.1 +/-1.6 vs 1.9 +/-2.3 (p=0.003), platelets 0.6 +/-0.8 vs 1.2 +/-1.3 (p=0.0008), and cryoprecipitate 0.3 +/-0.7 vs 0.7 +/-1.1 (p=0.008). Reduction in RBC transfusion was not statistically significant. The percentage of patients who received any transfusion was 53.9% in ANH and 59.5% in the control group (p=0.42). There was no significant difference in major adverse outcomes. Conclusions: ANH is a safe blood conservation strategy for surgical repairs of the thoracic aorta. Laboratory data suggests that ANH can improve coagulopathy after separation from CPB, and significantly reduce the number of transfused FFP, platelets and cryoprecipitate.

Absence of Beneficial Effect of Acute Normovolemic Hemodilution Combined with Aprotinin on Allogeneic Blood Transfusion Requirements in Cardiac Surgery

2002 ◽  
Vol 96 (2) ◽  
pp. 276-282 ◽  
Author(s):  
Laurent Höhn ◽  
Alexandre Schweizer ◽  
Marc Licker ◽  
Denis R. Morel
Keyword(s):  
Cardiac Surgery ◽  
Cardiopulmonary Bypass ◽  
High Risk ◽  
Blood Transfusion ◽  
Allogeneic Blood ◽  
Surgical Patients ◽  
Control Group ◽  
Acute Normovolemic Hemodilution ◽  
Normovolemic Hemodilution ◽  
Normal Cardiac Function

Background The efficacy of acute normovolemic hemodilution (ANH) in decreasing allogeneic blood requirements remains controversial during cardiac surgery. Methods In a prospective, randomized study, 80 adult cardiac surgical patients with normal cardiac function and no high risk of ischemic complications were subjected either to ANH, from a mean hematocrit of 43% to 28%, or to a control group. Aprotinin and intraoperative blood cell salvage were used in both groups. Blood (autologous or allogeneic) was transfused when the hematocrit was less than 17% during cardiopulmonary bypass, less than 25% after cardiopulmonary bypass, or whenever clinically indicated. Results The amount of whole blood collected during ANH ranged from 10 to 40% of the patients' estimated blood volume. Intraoperative and postoperative blood losses were not different between control and ANH patients (total blood loss, control: 1,411 +/- 570 ml, n = 41; ANH: 1,326 +/- 509 ml, n = 36). Allogeneic blood was given in 29% of control patients (median, 2; range, 1-3 units of packed erythrocytes) and in 33% of ANH patients (median, 2; range, 1-5 units of packed erythrocytes; P = 0.219). Preoperative and postoperative platelet count, prothrombin time, and partial thromboplastin time were similar between groups. Perioperative morbidity and mortality were not different in both groups, and similar hematocrit values were observed at hospital discharge (33.7 +/- 3.9% in the control group and 32.6 +/- 3.7% in the ANH group; nonsignificant) Conclusions Hemodilution is not an effective means to lower the risk of allogeneic blood transfusion in elective cardiac surgical patients with normal cardiac function and in the absence of high risk for coronary ischemia, provided standard intraoperative cell saving and high-dose aprotinin are used.

Acute normovolemic hemodilution in total knee arthroplasty, a prospective study

2016 ◽  
Author(s):  
Jin Kyu Lee ◽  
Mi Ae Cheong ◽  
Choong Hyeok Choi
Keyword(s):  
Total Knee Arthroplasty ◽  
Blood Transfusion ◽  
Knee Arthroplasty ◽  
Allogeneic Blood ◽  
Acute Normovolemic Hemodilution ◽  
Allogeneic Transfusion ◽  
Group A ◽  
Total Knee ◽  
Normovolemic Hemodilution ◽  
Group B

Abstract Objective: In this prospective, randomized, controlled trial we sought to evaluate the effectiveness of acute normovolemic hemodilution (ANH) in terms of decreasing the need for allogeneic transfusion after conventional unilateral total knee arthroplasty (TKA). Summary of Background Data: TKA is often performed with an occlusive tourniquet, and thus, it could be considered ideally suited for ANH, because the chief benefit of ANH is red blood cell loss reduction and the shedding of whole blood perioperatively at lower hematocrit levels. Methods: Between January 2012 and May 2012, 40 consecutive patients scheduled to undergo elective, primary, cemented, unilateral TKA for knee osteoarthritis were enrolled. Patients were randomized to either a study (ANH) group (n=20) (Group A) or a control group (n=20) (Group B). Unit of allogeneic blood transfused was considered the primary outcomes. Results : In the ANH group, less allogeneic blood transfusion (6 units in Group A vs 15 units in Group B) was required after operation. Six patients, who required a transfusion in Group A received 1 unit of allogeneic blood. In contrast, 6 of 9 patients, who required transfusion in Group B, received at least 2 units of allogeneic blood (p&lt;0.05). There was no complication related to the methods of the protocol. Conclusions: ANH is likely to reduce postoperative allogeneic transfusion requirement in patients undergoing unilateral TKA. However, adjunctive strategies are required to further reduce allogeneic blood transfusion requirements.

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