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Perfusion cardiac surgery

Walter H Reinhart
The hematocrit (Hct) determines the oxygen carrying capacity of blood, but also increases blood viscosity and thus flow resistance. From this dual role the concept of an optimum Hct for tissue oxygenation has been derived. Viscometric studies using the ratio Hct/blood viscosity at high shear rate showed an optimum Hct of 50-60% for red blood cell (RBC) suspensions in plasma. For the perfusion of an artificial microvascular network with 5-70μm channels the optimum Hct was 60-70% for high driving pressures. With lower shear rates or driving pressures the optimum Hct shifted towards lower values...
October 21, 2016: Clinical Hemorheology and Microcirculation
Anu K Kaskinen, Laura Martelius, Turkka Kirjavainen, Paula Rautiainen, Sture Andersson, Olli M Pitkänen
BACKGROUND: Lung ultrasounds show vertical artifacts known as B-lines in the presence of increased extravascular lung water (EVLW). We aimed to investigate whether lung ultrasound could estimate EVLW after congenital cardiac surgery. METHODS: This prospective observational study comprised 61 children (age range 3 days to 7.4 years) undergoing congenital cardiac surgery. We compared postoperative B-line scores from lung ultrasounds, early postoperative ultrasound as our primary interest, with corresponding postoperative chest radiography (CXR) lung edema scores, with static lung compliance, and with short-term clinical outcome interpreted as time on mechanical ventilation and length of pediatric intensive care unit (PICU) stay...
October 14, 2016: Pediatric Pulmonology
Donald S Likosky, Timothy A Dickinson, Theron A Paugh
Cardiac surgery accounts for between 15% and 20% of all blood product utilization in the United States. A body of literature suggests that patients who are exposed to even small quantities of blood have an increased risk of morbidity and mortality, even after adjusting for pre-operative risk. Despite this body of literature supporting a restrictive blood management strategy, wide variability in transfusion rates exist across institutions. Recent blood management guidelines have shed light on a number of potentially promising blood management strategies, including acute normovolemic hemodilution (ANH) and retrograde autologous priming (RAP)...
September 2016: Journal of Extra-corporeal Technology
Yanfei Chen, Bryan W Tillman, Sung Kwon Cho, Tara D Richards, Amit D Tevar, Xinzhu Gu, William R Wagner, Youngjae Chun
Donation after cardiac death has been adopted to address the critical shortage of donor organs for transplant. Recovery of these organs is hindered by low blood flow that leads to permanent organ injury. We propose a novel approach to isolate the perfusion of the abdominal organs from the systemic malperfusion of the dying donor. We reasoned that this design could improve blood flow to organs without open surgery, while respecting the ethical principle that cardiac stress not be increased during organ recovery...
October 7, 2016: Journal of Medical Engineering & Technology
Robert Anton Cesnjevar, Ariawan Purbojo, Frank Muench, Joerg Juengert, André Rueffer
Reduction of mortality and morbidity in congenital cardiac surgery has always been and remains a major target for the complete team involved. As operative techniques are more and more standardized and refined, surgical risk and associated complication rates have constantly been reduced to an acceptable level but are both still present. Aortic arch surgery in neonates seems to be of particular interest, because perfusion techniques differ widely among institutions and an ideal form of a so called "total body perfusion (TBP)" is somewhat difficult to achieve...
July 2016: Translational pediatrics
Chung Hun Lee, Dong Kyu Lee, Sang Ho Lim, Heezoo Kim
Left ventricular aneurysm (LVA) and false aneurysm are complications of acute myocardial infarction, trauma, and cardiac surgery. Left ventricular false aneurysm (LVFA) is a particularly catastrophic complication owing to its high propensity for rupture. Surgical resection should be considered for LVFA occurring within three months after myocardial infarction or development of congestive heart failure. In this report, we describe a case of acute heart failure with LVA and LVFA occurring in stage as a complication of myocardial infarction in a 55-year-old man...
October 2016: Korean Journal of Anesthesiology
Marija Bozhinovska, Gordana Taleska, Andrej Fabian, Maja Šoštarič
The postoperative low cardiac output is one of the most important complications following cardiac surgery and is associated with increased morbidity and mortality. The condition requires inotropic support to achieve adequate hemodynamic status and tissue perfusion. While catecholamines are utilised as a standard therapy in cardiac surgery, their use is limited due to increased oxygen consumption. Levosimendan is calcium sensitising inodilatator expressing positive inotropic effect by binding with cardiac troponin C without increasing oxygen demand...
September 15, 2016: Open Access Macedonian Journal of Medical Sciences
Zhongjian Cheng, Venkata Garikipati, Emily Nickoloff, Chunlin Wang, David J Polhemus, Jibin Zhou, Cynthia Benedict, Mohsin Khan, Suresh K Verma, Joseph E Rabinowitz, David Lefer, Raj Kishore
BACKGROUND: -Bone marrow cell-based treatment for critical limb ischemia (CLI) in diabetic patients yielded a modest therapeutic effect due to cell dysfunction. Therefore, approaches that improve diabetic stem/progenitor cell functions may provide therapeutic benefits. Here, we tested the hypotheses that restoration of hydrogen sulfide (H2S) production in diabetic bone marrow cells (BMCs) improves their reparative capacities. METHODS: -Mouse BMCs were isolated by density-gradient centrifugation...
September 22, 2016: Circulation
Katrine B Buggeskov, Martin M Sundskard, Thomas Jonassen, Lars W Andersen, Niels H Secher, Hanne B Ravn, Daniel A Steinbrüchel, Janus C Jakobsen, Jørn Wetterslev
INTRODUCTION: Absence of pulmonary perfusion during cardiopulmonary bypass (CPB) may be associated with reduced postoperative oxygenation. Effects of active pulmonary artery perfusion were explored in patients with chronic obstructive pulmonary disease (COPD) undergoing cardiac surgery. METHODS: 90 patients were randomised to receive pulmonary artery perfusion during CPB with either oxygenated blood (n=30) or histidine-tryptophan-ketoglutarate (HTK) solution (n=29) compared with no pulmonary perfusion (n=31)...
2016: BMJ Open Respiratory Research
Chantal A Boly, Etto C Eringa, R Arthur Bouwman, Rob F P van den Akker, Frances S de Man, Ingrid Schalij, Stephan A Loer, Christa Boer, Charissa E van den Brom
BACKGROUND: While most studies focus on cardiovascular morbidity following anesthesia and surgery in excessive obesity, it is unknown whether these intraoperative cardiovascular alterations also occur in milder forms of adiposity without type 2 diabetes and if insulin is a possible treatment to improve intraoperative myocardial performance. In this experimental study we investigated whether mild adiposity without metabolic alterations is already associated with cardiometabolic dysfunction during anesthesia, mechanical ventilation and surgery and whether these myocardial alterations can be neutralized by intraoperative insulin treatment...
2016: Cardiovascular Diabetology
Heike A Hildebrandt, Vincent Kreienkamp, Sabine Gent, Philipp Kahlert, Gerd Heusch, Petra Kleinbongard
Although remote ischemic pre-conditioning (RIPC) reduced infarct size in animal experiments and proof-of-concept clinical trials, recent phase III trials failed to confirm cardioprotection during cardiac surgery. Here, we characterized the kinetic properties of humoral factors that are released after RIPC, as well as the signal transduction pathways that were responsible for cardioprotection in an ex vivo model of global ischemia reperfusion injury. Venous blood from 20 healthy volunteers was collected at baseline and 5 min, 30 min, 1 h, 6 h, and daily from 1 to 7 days after RIPC (3 × 5/5 min upper-limb ischemia/reperfusion)...
January 2016: JACC. Basic to Translational Science
Alice E Kane, Susan E Howlett
The incidence of cardiovascular disease is rising as the population ages. This has led to an increase in the need to perform cardiac surgery in older patients. However, aged hearts are particularly susceptible to reperfusion injury following periods of myocardial ischemia that occur during cardiac surgery. Indeed, older adults experience myocardial dysfunction and reduced survival post-surgery compared to younger people and certain groups, including older women and frail older adults, are at particular risk...
September 14, 2016: Clinical and Experimental Pharmacology & Physiology
Amit Bardia, Akshay Sood, Feroze Mahmood, Vwaire Orhurhu, Ariel Mueller, Mario Montealegre-Gallegos, Marc R Shnider, Klaas H J Ultee, Marc L Schermerhorn, Robina Matyal
Importance: Epidural analgesia (EA) is used as an adjunct procedure for postoperative pain control during elective abdominal aortic aneurysm (AAA) surgery. In addition to analgesia, modulatory effects of EA on spinal sympathetic outflow result in improved organ perfusion with reduced complications. Reductions in postoperative complications lead to shorter convalescence and possibly improved 30-day survival. However, the effect of EA on long-term survival when used as an adjunct to general anesthesia (GA) during elective AAA surgery is unknown...
September 7, 2016: JAMA Surgery
Runsheng Peng, Jun Ba, Chunsheng Wang, Hao Lai, Kejian Hu, Hui Shi
OBJECTIVE: To summarise the experiences of applying vacuum-assist with a single femoral venous cannula drainage technique in minimally invasive isolated redo tricuspid surgery. METHODS: Eight consecutive patients underwent minimally invasive redo tricuspid surgery through a right thoracotomy at our institute. All of the patients had isolated significant tricuspid regurgitation after previous cardiac surgeries, and received minimally invasive redo tricuspid surgery...
August 17, 2016: Heart, Lung & Circulation
Javier Ripollés, Angel Espinosa, Eugenio Martínez-Hurtado, Alfredo Abad-Gurumeta, Rubén Casans-Francés, Cristina Fernández-Pérez, Francisco López-Timoneda, José María Calvo-Vecino
BACKGROUND: The goal directed hemodynamic therapy is an approach focused on the use of cardiac output and related parameters as end-points for fluids and drugs to optimize tissue perfusion and oxygen delivery. Primary aim: To determine the effects of intraoperative goal directed hemodynamic therapy on postoperative complications rates. METHODS: A meta-analysis was carried out of the effects of goal directed hemodynamic therapy in adult noncardiac surgery on postoperative complications and mortality using Preferred Reporting Items for Systematic Reviews and Meta-Analyses methodology...
September 2016: Brazilian Journal of Anesthesiology
Xu Liu, Kai Zhang, Wei Wang, Guohao Xie, Baoli Cheng, Yan Wang, Yaoqin Hu, Xiangming Fang
OBJECTIVES: To compare the effects of dexmedetomidine and propofol on sublingual microcirculation in patients after cardiac surgery. DESIGN: A prospective, randomized, single-blind study. SETTING: University hospital. PARTICIPANTS: Adult patients undergoing elective valve surgery with cardiopulmonary bypass. INTERVENTIONS: On arrival in the intensive care unit (ICU), patients were assigned randomly to receive either dexmedetomidine (0...
May 25, 2016: Journal of Cardiothoracic and Vascular Anesthesia
Andrea Carsetti, Hollmann D Aya, Silvia Pierantozzi, Simone Bazurro, Abele Donati, Andrew Rhodes, Maurizio Cecconi
Analysis of the microcirculation is currently performed offline, is time consuming and operator dependent. The aim of this study was to assess the ability and efficiency of the automatic analysis software CytoCamTools 1.7.12 (CC) to measure microvascular parameters in comparison with Automated Vascular Analysis (AVA) software 3.2. 22 patients admitted to the cardiothoracic intensive care unit following cardiac surgery were prospectively enrolled. Sublingual microcirculatory videos were analysed using AVA and CC software...
September 1, 2016: Journal of Clinical Monitoring and Computing
Xian-Yue Wang, Wen-Peng Dong, Guang Tong, Sheng-Hui Bi, Ben Zhang, Hua Lu, Xiao-Wu Wang, Wei-da Zhang
OBJECTIVE: To investigate the protective effects of high-dose ulinastatin on the vital organs in patients undergoing total arch replacement for type A aortic dissection. METHODS: Between September 2014 and March 2016, 66 patients with type A aortic dissection underwent total arch replacement at our center. Thirty-six of the patients received ulinastatin treatment at 300 000 U/8 h from admission to 3 days postoperatively and at 300 000 U/2 h during cardiopulmonary bypass surgery (UTI group), and the other 30 patients did not receive perioperative ulinastatin treatment (control group)...
August 20, 2016: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
Thierry Caus, Dmitry Sirota, Joseph Nader, Maxim Lyashenko, Alexander Chernyavsky
BACKGROUND: The effectiveness of additional stenting of the distal aorta as compared to conventional surgery alone in type A aortic dissection (TAD) has yet to be proven. METHODS: We conducted this multicenter comparative study to evaluate the effects of antegrade bare stenting of the dissected aorta beyond the distal anastomosis with a Djumbodis(®) device system (DDS). Outcomes that were measured included early outcomes, overall mortality from aortic cause and late aortic events including re-interventions...
July 2016: Annals of Cardiothoracic Surgery
Ruchika Goel, Melissa M Cushing, Aaron A R Tobian
Red blood cell transfusions are a common life-saving intervention for neonates and children with anemia, but transfusion decisions, indications, and doses in neonates and children are different from those of adults. Patient blood management (PBM) programs are designed to assist clinicians with appropriately transfusing patients. Although PBM programs are well recognized and appreciated in the adult setting, they are quite far from standard of care in the pediatric patient population. Adult PBM standards cannot be uniformly applied to children, and there currently is significant variation in transfusion practices...
October 2016: Transfusion Medicine Reviews
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