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transfusion physiology

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https://www.readbyqxmd.com/read/28518049/red-blood-cell-storage-time-and-transfusion-current-practice-concerns-and-future-perspectives
#1
REVIEW
María García-Roa, María Del Carmen Vicente-Ayuso, Alejandro M Bobes, Alexandra C Pedraza, Ataúlfo González-Fernández, María Paz Martín, Isabel Sáez, Jerard Seghatchian, Laura Gutiérrez
Red blood cells (RBCs) units are the most requested transfusion product worldwide. Indications for transfusion include symptomatic anaemia, acute sickle cell crisis, and acute blood loss of more than 30% of the blood volume, with the aim of restoring tissue oxygen delivery. However, stored RBCs from donors are not a qualitative equal product, and, in many ways, this is a matter of concern in the transfusion practice. Besides donor-to-donor variation, the storage time influences the RBC unit at the qualitative level, as RBCs age in the storage bag and are exposed to the so-called storage lesion...
May 2017: Blood Transfusion, Trasfusione del Sangue
https://www.readbyqxmd.com/read/28488967/purinergic-control-of-red-blood-cell-metabolism-novel-strategies-to-improve-red-cell-storage-quality
#2
REVIEW
Kaiqi Sun, Angelo D'alessandro, Yang Xia
Transfusion of stored blood is regarded as one of the great advances in modern medicine. However, during storage in the blood bank, red blood cells (RBCs) undergo a series of biochemical and biomechanical changes that affect cell morphology and physiology and potentially impair transfusion safety and efficacy. Despite reassuring evidence from clinical trials, it is universally accepted that the storage lesion(s) results in the altered physiology of long-stored RBCs and helps explain the rapid clearance of up to one-fourth of long-stored RBCs from the recipient's bloodstream at 24 hours after administration...
April 12, 2017: Blood Transfusion, Trasfusione del Sangue
https://www.readbyqxmd.com/read/28479030/platelets-and-immunity-from-physiology-to-pathology
#3
O Garraud, A Chabert, H Hamzeh-Cognasse, S Laradi, F Cognasse
Blood platelets are cells acting during primary haemostasis. The thrombocytopenia observed in many different types of infectious processes begs the question of the relationship between cells and infectious pathogens and the role of platelets in the detection of biological hazards. This in turn brings us back to the role of platelets - via their molecular, membrane and secretory arsenal - in the detection and repair of vascular hazards. The common denominator between a breakdown of haemostasis and the risk of infection has been shown to be a cutoff point in the inflammatory continuum between physiology and physiopathology...
June 2017: Transfusion Clinique et Biologique: Journal de la Société Française de Transfusion Sanguine
https://www.readbyqxmd.com/read/28467607/environmental-temperature-affect-physiology-and-survival-of-nanosecond-pulsed-electric-field-treated-cells
#4
Shengyong Yin, Xudong Miao, Xueming Zhang, Xinhua Chen, Hao Wen
Nanosecond pulsed electric field (nsPEF) is a novel non-thermal tumor ablation technique. However, how nsPEF affect cell physiology at different environmental temperature is still kept unknown. But this issue is of critical clinical practice relevance. This work aim to investigate how nsPEF treated cancer cells react to different environmental temperatures (0°C, 4°C, 25°C and 37°C). Their cell viability, apoptosis, mitochondrial membrane potential, and reactive oxygen species (ROS) were examined. Lower temperature resulted in higher apoptosis rate, decreased mitochondria membrane potential and increased ROS levels...
May 3, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28452884/the-effect-of-reboa-partial-aortic-occlusion-and-aggressive-blood-transfusion-on-traumatic-brain-injury-in-a-swine-polytrauma-model
#5
M Austin Johnson, Timothy K Williams, Sarah-Ashley E Ferencz, Anders J Davidson, Rachel M Russo, William T O'Brien, Joseph M Galante, J Kevin Grayson, Lucas P Neff
OBJECTIVES: Despite clinical reports of poor outcomes, the degree to which REBOA exacerbates traumatic brain injury (TBI) is not known. We hypothesized that combined effects of increased proximal mean arterial pressure (pMAP), carotid blood flow (Qcarotid), and intracranial pressure (ICP) from REBOA would lead to TBI progression compared to partial aortic occlusion (PAO) or no intervention. METHODS: 21 swine underwent a standardized TBI via computer Controlled cortical impact followed by 25% total blood volume rapid hemorrhage...
April 27, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28452870/every-minute-counts-time-to-delivery-of-initial-massive-transfusion-cooler-and-its-impact-on-mortality
#6
David E Meyer, Laura A Vincent, Erin E Fox, Terence O'Keeffe, Kenji Inaba, Eileen Bulger, John B Holcomb, Bryan A Cotton
BACKGROUND: ACS-TQIP Best Practices recommends initial massive transfusion (MT) cooler delivery within 15 minutes of protocol activation, with a goal of 10 minutes. The current study sought to examine the impact of timing of first cooler delivery on patient outcomes. METHODS: Patients predicted to receive MT at 12 level-1 trauma centers were randomized to two separate transfusion ratios as described in the PROPPR trial. ABC score or clinician gestalt prediction of MT was used to randomize patients and call for initial study cooler...
April 27, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28442958/physiological-and-operative-severity-score-for-the-enumeration-of-mortality-and-morbidity-scoring-systems-for-assessment-of-patient-outcome-and-impact-of-surgeons-and-anesthesiologists-performance-in-hepatopancreaticobiliary-surgery
#7
Argyro Fassoulaki, Konstantinos Chondrogiannis, Chryssoula Staikou
CONTEXT: The physiological and operative severity score for the enumeration of mortality and morbidity (POSSUM) is a scoring system used to predict morbidity and mortality. AIMS: We compared the physiological and operative risk, the expected morbidity and mortality, and the observed postoperative mortality among patients operated by different surgeons and anesthetized by different anesthesiologists. SETTINGS AND DESIGN: This was a retrospective, single center study...
April 2017: Saudi Journal of Anaesthesia
https://www.readbyqxmd.com/read/28432665/systemic-and-microcirculatory-effects-of-blood-transfusion-in-experimental-hemorrhagic-shock
#8
Gonzalo Ferrara, Vanina S Kanoore Edul, Héctor S Canales, Enrique Martins, Carlos Canullán, Gastón Murias, Mario O Pozo, Juan F Caminos Eguillor, María G Buscetti, Can Ince, Arnaldo Dubin
BACKGROUND: The microvascular reperfusion injury after retransfusion has not been completely characterized. Specifically, the question of heterogeneity among different microvascular beds needs to be addressed. In addition, the identification of anaerobic metabolism is elusive. The venoarterial PCO2 to arteriovenous oxygen content difference ratio (Pv-aCO2/Ca-vO2) might be a surrogate for respiratory quotient, but this has not been validated. Therefore, our goal was to characterize sublingual and intestinal (mucosal and serosal) microvascular injury after blood resuscitation in hemorrhagic shock and its relation with O2 and CO2 metabolism...
December 2017: Intensive Care Medicine Experimental
https://www.readbyqxmd.com/read/28432428/tranexamic-acid-for-treatment-and-prophylaxis-of-bleeding-and-hyperfibrinolysis
#9
Ingrid Pabinger, Dietmar Fries, Herbert Schöchl, Werner Streif, Wolfgang Toller
Uncontrolled massive bleeding with subsequent derangement of the coagulation system is a major challenge in the management of both surgical and seriously injured patients. Under physiological conditions activators and inhibitors of coagulation regulate the sensitive balance between clot formation and fibrinolysis. In some cases, excessive and diffuse bleeding is caused by systemic activation of fibrinolysis, i. e. hyperfibrinolysis (HF). Uncontrolled HF is associated with a high mortality. Polytrauma patients and those undergoing surgical procedures involving organs rich in plasminogen proactivators (e...
April 21, 2017: Wiener Klinische Wochenschrift
https://www.readbyqxmd.com/read/28431416/caring-for-critically-injured-children-an-analysis-of-56-pediatric-damage-control-laparotomies
#10
Miguel A Villalobos, Joshua P Hazelton, Rachel L Choron, Lisa Capano-Wehrle, Krystal Hunter, John P Gaughan, Steven E Ross, Mark J Seamon
BACKGROUND: Injury is the leading cause of death in children under 18 years. Damage control principles have been extensively studied in adults but remain relatively unstudied in children. Our primary study objective was to evaluate the use of damage control laparotomy (DCL) in critically injured children. METHODS: An American College of Surgeons-verified Level 1 trauma center review (1996-2013) of pediatric trauma laparotomies was undertaken. Exclusion criteria included: age older than 18 years, laparotomy for abdominal compartment syndrome or delayed longer than 2 hours after admission...
May 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28428216/maturation-of-platelet-function-during-murine-fetal-development-in-vivo
#11
Andreas Margraf, Claudia Nussbaum, Ina Rohwedder, Sarah Klapproth, Angela R M Kurz, Annamaria Florian, Volker Wiebking, Joachim Pircher, Monika Pruenster, Roland Immler, Steffen Dietzel, Ludmila Kremer, Friedemann Kiefer, Markus Moser, Andreas W Flemmer, Elizabeth Quackenbush, Ulrich H von Andrian, Markus Sperandio
OBJECTIVE: Platelet function has been intensively studied in the adult organism. However, little is known about the function and hemostatic capacity of platelets in the developing fetus as suitable in vivo models are lacking. APPROACH AND RESULTS: To examine fetal platelet function in vivo, we generated a fetal thrombosis model and investigated light-/dye-induced thrombus formation by intravital microscopy throughout gestation. We observed that significantly less and unstable thrombi were formed at embryonic day (E) 13...
April 20, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28422699/hemorrhage-prediction-models-in-surgical-intensive-care-bedside-monitoring-data-adds-information-to-lab-values
#12
Marco De Pasquale, Travis Moss, Sergio Cerutti, James Calland, Douglas Lake, Randall Moorman, Manuela Ferrario
Hemorrhage is a frequent complication in surgery patients; its identification and management have received increasing attention as a target for quality improvement in patient care in the Intensive Care Unit (ICU). The purposes of this work were i) to find an early detection model for hemorrhage by exploring the range of data mining methods that are currently available, and ii) to compare prediction models utilizing continuously measured physiological data from bedside monitors to those using commonly obtained laboratory tests...
April 12, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28422440/blood-parameters-of-preterm-neonates-postnatal-evolution-according-to-gestational-age
#13
P Roudil, C Vasselon, B Trombert-Paviot, C Berger, H Patural
INTRODUCTION: The blood count provides qualitative and quantitative essential information on bloodlines. Reference hematologic parameters have been established in children and neonates, but few data are available regarding the premature population during the first month of life. The main objective of this study was to establish normative values for blood parameters for premature infants born between 26 and <37 weeks of gestation, during the first month of life, taking into account gestational and postnatal age and treatments that can impact the threshold values...
April 19, 2017: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/28402169/delta-check-practices-and-outcomes-a-q-probes-study-involving-49-health-care-facilities-and-6541-delta-check-alerts
#14
Ron B Schifman, Michael Talbert, Rhona J Souers
CONTEXT: - Delta checks serve as a patient-based quality control tool to detect testing problems. OBJECTIVE: - To evaluate delta check practices and outcomes. DESIGN: - Q-Probes participants provided information about delta check policies and procedures. Information about investigations, problems, and corrective actions was prospectively collected for up to 100 testing episodes involving delta check alerts. RESULTS: - Among 4505 testing episodes involving 6541 delta check alerts, the median frequencies of actions taken among 49 laboratories were clinical review, 38...
April 12, 2017: Archives of Pathology & Laboratory Medicine
https://www.readbyqxmd.com/read/28402148/should-modulation-of-p50-be-a-therapeutic-target-in-the-critically-ill
#15
Amudan J Srinivasan, Clare Morkane, Daniel S Martin, Ian J Welsby
A defining feature of human hemoglobin is its oxygen binding affinity, quantified by the partial pressure of oxygen at which hemoglobin is 50% saturated (p50), and the variability of this parameter over a range of physiological and environmental states. Modulation of this property of hemoglobin can directly affect the degree of peripheral oxygen offloading and tissue oxygenation. Areas covered: This review summarizes the role of hemoglobin oxygen affinity in normal and abnormal physiology and discusses the current state of the literature regarding artificial modulation of p50...
April 12, 2017: Expert Review of Hematology
https://www.readbyqxmd.com/read/28394022/limited-versus-full-sternotomy-for-aortic-valve-replacement
#16
REVIEW
Bilal H Kirmani, Sion G Jones, S C Malaisrie, Darryl A Chung, Richard Jnn Williams
BACKGROUND: Aortic valve disease is a common condition that is easily treatable with cardiac surgery. This is conventionally performed by opening the sternum longitudinally down the centre ("median sternotomy") and replacing the valve under cardiopulmonary bypass. Median sternotomy is generally well tolerated, but as less invasive options have become available, the efficacy of limited incisions has been called into question. In particular, the effects of reducing the visibility and surgical access has raised safety concerns with regards to the placement of cannulae, venting of the heart, epicardial wire placement, and de-airing of the heart at the end of the procedure...
April 10, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28393462/current-use-of-factor-concentrates-in-pediatric-cardiac-anesthesia
#17
REVIEW
Nina A Guzzetta, Glyn D Williams
Excessive bleeding following pediatric cardiopulmonary bypass is associated with increased morbidity and mortality, both from the effects of hemorrhage and the therapies employed to achieve hemostasis. Neonates and infants are especially at risk because their coagulation systems are immature, surgeries are often complex, and cardiopulmonary bypass technologies are inappropriately matched to patient size and physiology. Consequently, these young children receive substantial amounts of adult-derived blood products to restore adequate hemostasis...
April 10, 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28383467/the-effect-of-blood-transfusion-on-compensatory-reserve-a-prospective-clinical-trial
#18
Avi Benov, Ori Yaslowitz, Tal Hakim, Rotem Amir-Keret, Roy Nadler, Anat Brand, Elon Glassberg, Avi Yitzhak, Victor A Convertino, Haim Paran
BACKGROUND: Bleeding activates the body's compensatory mechanisms, causing changes in vital signs to appear late in the course of progressive blood loss. These vital signs are maintained even when up to 30% to 40% of blood volume is lost. Laboratory tests such as hemoglobin, hematocrit, lactate, and base deficit levels do not change during acute phase of bleeding. The compensatory reserve measurement (CRM) represents a new paradigm that measures the total of all physiological compensatory mechanisms, using noninvasive photoplethysmography to read changes in arterial waveforms...
April 5, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28370096/recipient-twin-circular-shunt-physiology-before-fetal-laser-surgery-survival-and-risks-for-postnatal-right-ventricular-outflow-tract-obstruction
#19
Jay D Pruetz, Jodie K Votava-Smith, Hikmat R Chmait, Lisa M Korst, Arlyn Llanes, Ramen H Chmait
OBJECTIVES: To evaluate risk for congenital heart disease (CHD) in recipient twins with circular shunt physiology (CSP). METHODS: This prospective study enrolled twin-twin transfusion syndrome (TTTS) cases from 2006 to 2015. Fetal echocardiography (FE) was performed before laser surgery when cardiac involvement was suspected. Diagnosis of recipient twin CSP required tricuspid and pulmonary regurgitation, right ventricular dysfunction, and flow reversal in the ductus arteriosus...
April 3, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28359342/measuring-the-impact-of-ambulatory-red-blood-cell-transfusion-on-home-functional-status-study-protocol-for-a-pilot-randomized-controlled-trial
#20
Dennis H Murphree, Theresa N Kinard, Nandita Khera, Curtis B Storlie, Che Ngufor, Sudhindra Upadhyaya, Jyotishman Pathak, Emma Fortune, Eapen K Jacob, Rickey E Carter, Karl A Poterack, Daryl J Kor
BACKGROUND: Red blood cell (RBC) transfusion is frequently employed in both ambulatory and hospital environments with the aim of improving patient functional status. In the ambulatory setting, this practice is particularly common in patients with malignancy due to anemia associated with their cancer therapy. Increasingly, the efficacy of this US$10.5 billion per year practice has been called into question. While it is often standard of care for patients with chemotherapy-induced anemia to receive ambulatory RBC transfusions, it is unclear to what extent such transfusions affect home functional status...
March 31, 2017: Trials
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