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Sturmer D, Beaty C, Clingan S, Jenkins E, Peters W, Si MS. Recent innovations in perfusion and cardiopulmonary bypass for neonatal and infant cardiac surgery. Transl Pediatr 2018; 7:139-150. [PMID: 29770295 PMCID: PMC5938255 DOI: 10.21037/tp.2018.03.05] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The development and refinement of cardiopulmonary bypass (CPB) has made the repair of complex congenital heart defects possible in neonates and infants. In the past, the primary goal for these procedures was patient survival. Now that substantial survival rates have been achieved for even the most complex of repairs in these patients, focus has been given to the reduction of morbidity. Although a necessity for these complex neonatal and infant heart defect repairs, CPB can also be an important source of perioperative complications. Recent innovations have been developed to mitigate these risks and is the topic of this review. Specifically, we will discuss improvements in minimizing blood transfusions, CPB circuit design, monitoring, perfusion techniques, temperature management, and myocardial protection, and then conclude with a brief discussion of how further systematic improvements can be made in these areas.
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Affiliation(s)
- David Sturmer
- Department of Perfusion, University of Michigan C.S. Mott Children's Hospital, Ann Arbor, MI, USA
| | - Claude Beaty
- Department of Cardiac Surgery, University of Michigan C.S. Mott Children's Hospital, Ann Arbor, MI, USA
| | - Sean Clingan
- Deprtment of Perfusion, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Eric Jenkins
- Department of Perfusion, University of Michigan C.S. Mott Children's Hospital, Ann Arbor, MI, USA
| | - Whitney Peters
- Department of Perfusion, University of Michigan C.S. Mott Children's Hospital, Ann Arbor, MI, USA
| | - Ming-Sing Si
- Department of Cardiac Surgery, University of Michigan C.S. Mott Children's Hospital, Ann Arbor, MI, USA
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Raja SG, Yousufuddin S, Rasool F, Nubi A, Danton M, Pollock J. Impact of Modified Ultrafiltration on Morbidity after Pediatric Cardiac Surgery. Asian Cardiovasc Thorac Ann 2016; 14:341-50. [PMID: 16868113 DOI: 10.1177/021849230601400417] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Cardiopulmonary bypass is a double-edged sword. Without it, corrective cardiac surgery would not be possible in the majority of children with congenital heart disease. However, much of the perioperative morbidity that occurs after cardiac surgery can be attributed to a large extent to pathophysiologic processes engendered by extracorporeal circulation. One of the challenges that has confronted pediatric cardiac surgeons has been to minimize the consequences of cardiopulmonary bypass. Ultrafiltration is a strategy that has been used for many years in an effort to attenuate the effects of hemodilution that occur when small children undergo surgery with cardiopulmonary bypass. Over the past several years, a modified technique of ultrafiltration, commonly known as modified ultrafiltration, has been used with increasing enthusiasm. Multiple studies have been undertaken to assess the effects of modified ultrafiltration on organ function and postoperative morbidity following repair of congenital heart defects. This review attempts to evaluate current available scientific evidence on the impact of modified ultrafiltration on organ function and morbidity after pediatric cardiac surgery.
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Affiliation(s)
- Shahzad G Raja
- Department of Cardiac Surgery, Royal Hospital for Sick Children, Yorkhill NHS Trust, Dalnair Street, Glasgow G3 8SJ, United Kingdom.
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More does not mean better: modified ultrafiltration and outcomes after cardiac surgery*. Pediatr Crit Care Med 2014; 15:670-1. [PMID: 25186321 DOI: 10.1097/pcc.0000000000000191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Transfusion of washed red blood cells and platelets: what is left behind? Pediatr Crit Care Med 2012; 13:357-60. [PMID: 22561265 DOI: 10.1097/pcc.0b013e318245c74e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Neema PK, Singha SK, Manikandan S, Muralikrishna T, Rathod RC, Dhawan R, Stafford-Smith M. Case 6-2011: Aortic valve replacement in a patient with aortic stenosis, dilated cardiomyopathy, and renal dysfunction. J Cardiothorac Vasc Anesth 2011; 25:1193-9. [PMID: 21924640 DOI: 10.1053/j.jvca.2011.06.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2010] [Indexed: 11/11/2022]
Affiliation(s)
- Praveen Kumar Neema
- Department of Anaesthesiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India.
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6
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Makar M, Taylor J, Zhao M, Farrohi A, Trimming M, D’Attellis N. Perioperative Coagulopathy, Bleeding, and Hemostasis During Cardiac Surgery. ACTA ACUST UNITED AC 2010. [DOI: 10.1177/1944451609357759] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Cardiac surgery patients use 10%-25% of the blood products transfused annually in the United States. The transfusion of red blood cells or blood products has been the subject of intense scrutiny over the past 10 years. Bleeding after cardiac surgery can be surgical or nonsurgical and lead to hemodynamic compromise and surgical reexploration. Because hemorrhage and blood product transfusions are associated with multiple negative outcomes, including increased mortality, it is prudent to understand the mechanisms responsible for nonsurgical bleeding. This review focuses on the physiology of the normal coagulation and fibrinolysis, risk factors associated with patients presenting for cardiac surgery, impairments of normal hemostasis associated with cardiac surgery and cardiopulmonary bypass (CPB), and potential interventions to reduce perioperative blood loss and blood transfusion.
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Affiliation(s)
- Moody Makar
- Department of Anesthesiology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Jamie Taylor
- Department of Anesthesiology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Maxnu Zhao
- Department of Anesthesiology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Ali Farrohi
- Department of Anesthesiology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Michael Trimming
- Department of Anesthesiology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Nicola D’Attellis
- Department of Anesthesiology, Cedars-Sinai Medical Center, Los Angeles, California
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Ferraris VA, Ferraris SP, Saha SP, Hessel EA, Haan CK, Royston BD, Bridges CR, Higgins RSD, Despotis G, Brown JR, Spiess BD, Shore-Lesserson L, Stafford-Smith M, Mazer CD, Bennett-Guerrero E, Hill SE, Body S. Perioperative blood transfusion and blood conservation in cardiac surgery: the Society of Thoracic Surgeons and The Society of Cardiovascular Anesthesiologists clinical practice guideline. Ann Thorac Surg 2007; 83:S27-86. [PMID: 17462454 DOI: 10.1016/j.athoracsur.2007.02.099] [Citation(s) in RCA: 543] [Impact Index Per Article: 31.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2006] [Revised: 01/21/2007] [Accepted: 02/08/2007] [Indexed: 01/24/2023]
Abstract
BACKGROUND A minority of patients having cardiac procedures (15% to 20%) consume more than 80% of the blood products transfused at operation. Blood must be viewed as a scarce resource that carries risks and benefits. A careful review of available evidence can provide guidelines to allocate this valuable resource and improve patient outcomes. METHODS We reviewed all available published evidence related to blood conservation during cardiac operations, including randomized controlled trials, published observational information, and case reports. Conventional methods identified the level of evidence available for each of the blood conservation interventions. After considering the level of evidence, recommendations were made regarding each intervention using the American Heart Association/American College of Cardiology classification scheme. RESULTS Review of published reports identified a high-risk profile associated with increased postoperative blood transfusion. Six variables stand out as important indicators of risk: (1) advanced age, (2) low preoperative red blood cell volume (preoperative anemia or small body size), (3) preoperative antiplatelet or antithrombotic drugs, (4) reoperative or complex procedures, (5) emergency operations, and (6) noncardiac patient comorbidities. Careful review revealed preoperative and perioperative interventions that are likely to reduce bleeding and postoperative blood transfusion. Preoperative interventions that are likely to reduce blood transfusion include identification of high-risk patients who should receive all available preoperative and perioperative blood conservation interventions and limitation of antithrombotic drugs. Perioperative blood conservation interventions include use of antifibrinolytic drugs, selective use of off-pump coronary artery bypass graft surgery, routine use of a cell-saving device, and implementation of appropriate transfusion indications. An important intervention is application of a multimodality blood conservation program that is institution based, accepted by all health care providers, and that involves well thought out transfusion algorithms to guide transfusion decisions. CONCLUSIONS Based on available evidence, institution-specific protocols should screen for high-risk patients, as blood conservation interventions are likely to be most productive for this high-risk subset. Available evidence-based blood conservation techniques include (1) drugs that increase preoperative blood volume (eg, erythropoietin) or decrease postoperative bleeding (eg, antifibrinolytics), (2) devices that conserve blood (eg, intraoperative blood salvage and blood sparing interventions), (3) interventions that protect the patient's own blood from the stress of operation (eg, autologous predonation and normovolemic hemodilution), (4) consensus, institution-specific blood transfusion algorithms supplemented with point-of-care testing, and most importantly, (5) a multimodality approach to blood conservation combining all of the above.
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Williams GD, Ramamoorthy C, Chu L, Hammer GB, Kamra K, Boltz MG, Pentcheva K, McCarthy JP, Reddy VM. Modified and conventional ultrafiltration during pediatric cardiac surgery: Clinical outcomes compared. J Thorac Cardiovasc Surg 2006; 132:1291-8. [PMID: 17140945 DOI: 10.1016/j.jtcvs.2006.05.059] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2006] [Revised: 05/03/2006] [Accepted: 05/12/2006] [Indexed: 11/27/2022]
Abstract
OBJECTIVE This prospective study compared clinical outcomes after heart surgery between three groups of infants with congenital heart disease. One group received dilutional conventional ultrafiltration (group D), another received modified ultrafiltration (group M), and a third group received both dilutional conventional and modified ultrafiltration (group B). We hypothesized that group B patients would have the best clinical outcome. METHODS Children younger than 1 year undergoing heart surgery for biventricular repair by the same surgeon were randomly allocated to one of the three study groups. Patient management was standardized, and intensive care staff were blinded to group allocation. Primary outcome measure was duration of postoperative mechanical ventilation. Other outcome measures recorded included total blood products transfused, duration of chest tube in situ, chest tube output, and stays in intensive care and in the hospital. RESULTS Sixty infants completed study protocol. Mean age and weight were as follows: group D (n = 19), 61 days, 4.3 kg; group M (n = 20), 64 days, 4.5 kg; and group B (n = 21), 86 days, 4.4 kg. Preoperative and intraoperative characteristics were similar between groups. Ultrafiltrate volumes obtained were 196 +/- 93 mL/kg in group D, 105 +/- 33 mL/kg in group M, and 261 +/- 113 mL/kg in group B. There were no significant differences between groups for any outcome variable. Technical difficulties prevented completion of modified ultrafiltration in 2 of 41 infants. CONCLUSION There was no clinical advantage in combining conventional and modified ultrafiltration. Because clinical outcomes were similar across groups, relative risks of the ultrafiltration strategies may influence choice.
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Affiliation(s)
- Glyn D Williams
- Department of Anesthesia, Stanford University School of Medicine, Stanford, Calif 94305-5640, USA.
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Rodriguez RA, Ruel M, Broecker L, Cornel G. High Flow Rates During Modified Ultrafiltration Decrease Cerebral Blood Flow Velocity and Venous Oxygen Saturation in Infants. Ann Thorac Surg 2005; 80:22-8. [PMID: 15975333 DOI: 10.1016/j.athoracsur.2005.01.030] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2004] [Revised: 01/06/2005] [Accepted: 01/10/2005] [Indexed: 11/15/2022]
Abstract
BACKGROUND The intracranial hemodynamic effects of modified ultrafiltration in children are unknown. We investigated the effects of different blood flow rates during modified ultrafiltration on the cerebral hemodynamics of children with weights above and below 10 kg. METHODS Thirty-one children (weights: < or = 10 kg, n = 21; > 10 kg, n = 10) undergoing cardiopulmonary bypass were studied. Middle-cerebral artery blood flow velocities and cerebral mixed venous oxygen saturations were measured before, five minutes from the beginning, and at the end of ultrafiltration. Patients were classified according to their blood flow rates during ultrafiltration in three groups: high (> or = 20 mL/kg/min), moderate (10-19 mL/kg/min), and low flow rates (< 10 mL/kg/min). RESULTS During modified ultrafiltration, blood pressures and hematocrit increased (p < 0.001), but cerebral blood flow velocities and mixed venous oxygen saturations decreased (p < 0.001). A significant correlation was found between blood flow rates of ultrafiltration and the decline in mean cerebral blood flow velocity (r = - 0.48; p = 0.005) and cerebral oxygen saturation (r = - 0.49; p = 0.005) or hematocrit increase (r = 0.59; p = 0.001). Infants exposed to high flow rates had greater reduction of cerebral blood flow velocity and regional mixed venous saturation and higher hematocrit at the end of ultrafiltration compared with those subjected to moderate and low flow rates (p < 0.04). No significant difference was found between moderate and low flow groups. The flow rate of ultrafiltration was the only independent predictor of the changes in cerebral mixed venous oxygen saturation (p = 0.033). CONCLUSIONS High blood flow rates through the ultrafilter during modified ultrafiltration transiently decrease the cerebral circulation in young infants compared with lower blood flow rates. These effects may be related to an increased diastolic runoff from the aorta into the ultrafiltration circuit that leads to a "stealing" effect from the intracranial circulation, which may be important in infants with dysfunctional cerebral autoregulation.
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de Baar M, Diephuis JC, Moons KGM, Holtkamp J, Hijman R, Kalkman CJ. The effect of zero-balanced ultrafiltration during cardiopulmonary bypass on S100b release and cognitive function. Perfusion 2003; 18:9-14. [PMID: 12705644 DOI: 10.1191/0267659103pf621oa] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Zero-balanced ultrafiltration (ZBUF) might reduce the systemic inflammatory response (SIRS) during cardiopulmonary bypass (CPB) by removing inflammatory mediators. The objective of this study was to determine the effect of ZBUF on postoperative serum S100b levels, a marker of neuronal injury. In addition, the possible effects of ZBUF on postoperative neurocognitive function were assessed. Sixty patients undergoing elective coronary bypass grafting were randomly assigned either to a control group or to a protocol group in which ZBUF was performed. Serum S100b levels were measured five minutes after intubation, at the end of bypass and eight and 20 hours after arrival at the intensive care unit (ICU). Cognitive function was assessed with neuropsychological tests on the day before the operation and the sixth day after surgery. The S100b level at 20 hours after arrival at the ICU was 0.27 g/L (SD 0.16) in the control and 0.25 g/L (SD 0.12) in the group with ZBUF. There were no statistical differences at any time between the two groups. S100b was not detectable in the ultrafiltrate, indicating that these results were not obscured by washout of S100b. Thirteen patients (52%) in the control group and 14 patients (56%) in the ZBUF group showed a cognitive deficit. In conclusion, ZBUF during CPB does not decrease the release of S100b. This result is not affected by washout. ZBUF did not reduce the incidence of early neurocognitive deficits. The role of SIRS in the development of cognitive dysfunction following CPB remains to be resolved.
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Affiliation(s)
- M de Baar
- Department of Anaesthesiology, University Medical Centre Utrecht, Utrecht, The Netherlands.
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Stephenson ER, Myers JL. Pediatric cardiopulmonary bypass. Ann Thorac Surg 2001; 72:2176-7. [PMID: 11789830 DOI: 10.1016/s0003-4975(01)02996-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- E R Stephenson
- Pediatric Cardiovascular Surgery, Penn State Children's Hospital, Penn State Hershey Medical Center, Hershey 17033, USA
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Yndgaard S, Andersen LW, Andersen C, Petterson G, Baek L. The effect of modified ultrafiltration on the amount of circulating endotoxins in children undergoing cardiopulmonary bypass. J Cardiothorac Vasc Anesth 2000; 14:399-401. [PMID: 10972604 DOI: 10.1053/jcan.2000.7944] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE To determine whether the use of modified ultrafiltration during pediatric cardiopulmonary bypass (CPB) diminishes the load of circulating endotoxins. DESIGN Single-arm prospective observational study. SETTING A university hospital operating room and intensive care unit. PARTICIPANTS Twenty children undergoing CPB for correction of various congenital heart diseases. INTERVENTIONS The amount of endotoxins in plasma was measured during CPB and before and after modified ultrafiltration. The ultrafiltrate was assayed for the presence of endotoxins. Postoperatively, the children were followed with relevant infectious parameters and cultures. MEASUREMENTS AND MAIN RESULTS The amount of endotoxins increased significantly during the CPB procedure (from a median of 1.3 ng [range, 0 to 13.7 ng] to 24.2 ng [range, 2.1 to 75.9 ng]). After termination of CPB, modified ultrafiltration was shown to lower the amount of circulating endotoxins in blood (from a median of 24.2 ng [range, 2.1 to 75.4 ng] to 9.0 [range, 0.1 to 40.6 ng]). The major bulk of this reduction in endotoxin load was retrieved in the ultrafiltrate (median of 11.9 ng [range, 0 to 12.1 ng]). CONCLUSION This study strongly suggests that modified ultrafiltration decreases the amount of circulating endotoxins in children undergoing cardiac surgery.
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Affiliation(s)
- S Yndgaard
- Department of Cardiothoracic Anesthesia and Cardiac Surgery, The Heart Center, University of Copenhagen, Rigshospitalet, Denmark
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