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https://www.readbyqxmd.com/read/28965130/regulation-of-myocardial-oxygen-delivery-in-response-to-graded-reductions-in-hematocrit-role-of-k-channels
#1
Alexander M Kiel, Adam G Goodwill, Jillian N Noblet, April L Barnard, Daniel J Sassoon, Johnathan D Tune
This study was designed to identify mechanisms responsible for coronary vasodilation in response to progressive decreases in hematocrit. Isovolemic hemodilution was produced in open-chest, anesthetized swine via concurrent removal of 500 ml of arterial blood and the addition of 500 ml of 37 °C saline or synthetic plasma expander (Hespan, 6% hetastarch in 0.9% sodium chloride). Progressive hemodilution with Hespan resulted in an increase in coronary flow from 0.39 ± 0.05 to 1.63 ± 0.16 ml/min/g (P < 0...
September 30, 2017: Basic Research in Cardiology
https://www.readbyqxmd.com/read/28863020/validating-the-physiologic-model-hummod-as-a-substitute-for-clinical-trials-involving-acute-normovolemic-hemodilution
#2
Charles R Sims, Luis R Delima, Arthur Calimaran, Robert Hester, W Andrew Pruett
BACKGROUND: Blood conservation strategies and transfusion guidelines remain a heavily debated clinical topic. Previous investigational trials have shown that acute isovolemic hemodilution does not limit adequate oxygen delivery; however, a true critical hemoglobin level has never been investigated or defined due to safety concerns for human volunteers. Validated physiologic modeling may be useful to investigate hemodilution at critical hemoglobin levels without the ethical or safety hazards of clinical trials...
August 31, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28804896/load-dependence-of-myocardial-deformation-variables-a-clinical-strain-echocardiographic-study
#3
M Fredholm, K Jörgensen, E Houltz, S-E Ricksten
BACKGROUND: The effects of left ventricular (LV) loading on myocardial deformation variables are not well-studied in the clinical setting. In the present study, we evaluated the effects of isolated changes in preload, afterload and heart rate on LV longitudinal strain, systolic (SR-S) and early diastolic strain rate (SR-E) in post-cardiac surgery patients. METHODS: Twenty-one patients were studied early after cardiac surgery. Longitudinal myocardial strain and SR were analysed off-line using 2-D speckle echocardiography...
August 13, 2017: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/28531172/experimental-evaluation-of-cryopreservative-solutions-to-maintain-in-vitro-and-in-vivo-infectivity-of-p-berghei-sporozoites
#4
Naresh Singh, Samantha J Barnes, Sandra Kennedy, John H Adams
The rodent malaria parasite Plasmodium berghei is an excellent model organism for laboratory-based experimental evaluation of anti-malarial therapeutics prior to studies with human malaria parasites. The rodent model is especially important for evaluation of pre-erythrocytic (PE) stage therapies, especially as current efforts to develop new PE vaccines and drugs is limited by access to P. falciparum and P. vivax sporozoites. Developing a more effective method for cryopreservation of sporozoites would help improve access to sporozoites for laboratories lacking suitable insectary facilities...
2017: PloS One
https://www.readbyqxmd.com/read/28265454/fluid-resuscitation-in-haemorrhagic-shock-in-combat-casualties
#5
REVIEW
Parli R Ravi, Bipin Puri
This brief update reviews the recent literature available on fluid resuscitation from hemorrhagic shock and considers the applicability of this evidence for use in resuscitation of combat casualties in the combat casualty care (CCC) environment. A number of changes need to be incorporated in the CCC guidelines: (1) dried plasma (DP) is added as an option when other blood components or whole blood are not available; (2) the wording is clarified to emphasize that Hetastarch is a less desirable option than whole blood, blood components, or DP and should be used only when these preferred options are not available; (3) the use of blood products in certain tactical field care settings where this option might be feasible (FSC, GH) is discussed; (4) 1:1:1 damage control resuscitation (DCR) with plasma: packed red blood cells (PRBC): platelets is preferred to 1:1 DCR with plasma: PRBC when platelets are available; and (5) the 30-min wait between increments of resuscitation fluid administered to achieve clinical improvement or target blood pressure has been eliminated...
2017: Disaster and Military Medicine
https://www.readbyqxmd.com/read/28129711/the-effect-of-ppolyhb-on-hemodynamic-stability-and-mesenteric-microcirculation-in-a-rat-model-of-hemorrhagic-shock
#6
Jing Zhao, Chengbin Yan, Lijuan Xu, Kunping Yan, Bao Feng, Mengye Zhao, Geng Niu, Mengdi Wu, Chao Chen, Hongli Zhu
The effects of polymerized porcine hemoglobin (pPolyHb) on hemodynamic stability and maintenance of mesenteric microvascular function were explored in a rat model of hemorrhagic shock (HS). Following controlled hemorrhage, rats were infused with equal volumes of either pPolyHb, hetastarch (HES), or red blood cell (RBC). The results showed that pPolyHb was superior to HES and RBC in restoring hemodynamic stability and reversing anaerobic metabolism. We observed a reduction in the diameter of mesenteric microvasculature after HS...
June 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/27859322/granulocytapheresis-with-modified-fluid-gelatin-versus-high-molecular-weight-hydroxyethyl-starch-a-matched-pair-analysis
#7
COMPARATIVE STUDY
Katharina Dullinger, Irene Pamler, Andreas Brosig, Morad Mohrez, Viola Hähnel, Robert Offner, Frauke Dormann, Christine Becke, Ernst Holler, Norbert Ahrens
BACKGROUND: Granulocyte apheresis requires a sedimentation agent. Usually, hydroxyethyl starch (HES) is administered to donors for this purpose and, as granulocyte concentrate (GC) ingredient, also to patients. Authorities recently recommended suspending market authorizations for starch-containing products due to side effects. Therefore, we tested the efficacy of modified fluid gelatin (MFG, Gelafundin 4%) versus hetastarch (Hespan) for GC apheresis. STUDY DESIGN AND METHODS: This retrospective matched-pair analysis compared MFG- and hetastarch-derived GCs...
February 2017: Transfusion
https://www.readbyqxmd.com/read/27725221/fresh-frozen-plasma-modulates-brain-gene-expression-in-a-swine-model-of-traumatic-brain-injury-and-shock-a-network-analysis
#8
Martin Sillesen, Ted Bambakidis, Simone E Dekker, Yongqing Li, Hasan B Alam
BACKGROUND: Resuscitation with fresh frozen plasma (FFP) decreases brain lesion size and swelling in a swine model of traumatic brain injury and hemorrhagic shock. We hypothesized that brain gene expression profiles after traumatic brain injury and hemorrhagic shock would be modulated by FFP resuscitation. STUDY DESIGN: Fifteen swine underwent a protocol of traumatic brain injury and hemorrhagic shock and 2 hours of shock followed by resuscitation with FFP, normal saline, or hetastarch (5/group)...
January 2017: Journal of the American College of Surgeons
https://www.readbyqxmd.com/read/27692904/con-hetastarch-should-be-avoided-for-volume-expansion-in-cardiac-surgery-patients
#9
Fabrizzio Sacchet-Cardozo, Nicoleta Stoicea, Nicholas Joseph, Elisabeth Dewhirst, Michael Essandoh
No abstract text is available yet for this article.
July 21, 2016: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/27424021/hydroxyethyl-starch-could-save-a-patient-with-acute-aluminum-phosphide-poisoning
#10
Sayed Mahdi Marashi, Zeynab Nasri Nasrabadi, Mostafa Jafarzadeh, Sogand Mohammadi
A 40-year-old male patient with suicidal ingestion of one tablet of aluminium phosphide was referred to the department of toxicology emergency of Baharloo Hospital, Tehran, Iran. The garlic odor was smelled from the patient and abdominal pain and continuous vomiting as well as agitation and heartburn were the first signs and symptoms. Systolic and diastolic blood pressures at the arrival time were 95 and 67 mmHg, respectively. Gastric lavage with potassium permanganate (1:10,000), and 2 vials of sodium bicarbonate through a nasogastric tube was started for the patient and the management was continued with free intravenous infusion of 1 liter of NaCl 0...
July 2016: Acta Medica Iranica
https://www.readbyqxmd.com/read/27364518/effects-of-hydroxyethyl-starch-6%C3%A2-130-0-4-on-blood-loss-during-cesarean-delivery-a-propensity-matched-analysis
#11
COMPARATIVE STUDY
Abdullah S Terkawi, Sarah K Larkin, Siny Tsang, Jessica S Sheeran, Mohamed Tiouririne
BACKGROUND: Hydroxyethyl starch is commonly used in the obstetric patient population to prevent hypotension during cesarean delivery. Evidence suggests hetastarch is associated with a dysfunction in coagulation cascade. We hypothesized that hetastarch use to prevent spinal hypotension during cesarean delivery would be associated with an increase in blood loss when compared to crystalloid use. METHODS: We performed a retrospective review of patients who underwent elective cesarean delivery under spinal anesthesia at the University of Virginia between 2011 and 2014...
October 2016: Journal of Anesthesia
https://www.readbyqxmd.com/read/27347823/effect-of-infusion-of-equine-plasma-or-6-hydroxyethyl-starch-600-0-75-solution-on-plasma-colloid-osmotic-pressure-in-healthy-horses
#12
RANDOMIZED CONTROLLED TRIAL
Erica C McKenzie, Melissa M Esser, Sarah E McNitt, Mark E Payton
OBJECTIVE To compare the effects of equivalent volumes of equine plasma and 6% hydroxyethyl starch (600/0.75) solution (hetastarch) administered IV on plasma colloid osmotic pressure (pCOP) and commonly monitored clinicopathologic variables in horses. ANIMALS 6 healthy mares. PROCEDURES In a randomized, crossover study, horses were administered hetastarch or plasma (both 10 mL/kg, IV) 18 months apart. The pCOP and variables of interest were measured before (baseline), immediately after, and at intervals up to 96 or 120 hours after infusion...
July 2016: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/27225986/effects-of-resuscitation-with-polymerized-porcine-hemoglobin-ppolyhb-on-hemodynamic-stability-and-oxygen-delivery-in-a-rat-model-of-hemorrhagic-shock
#13
Li Wang, Fang Liu, Kunping Yan, Wencan Pan, Lijuan Xu, Huifang Liu, Chengbin Yan, Chao Chen, Hongli Zhu
The objective of this study was to evaluate the effects of polymerized porcine hemoglobin (pPolyHb) on hemodynamic stability and oxygen delivery in a rat model of hemorrhagic shock. Rats underwent controlled hemorrhage, resulting in the loss of 65% of their blood volume in 90 minutes. The results showed that pPolyHb was superior to hetastarch and saline, and similar to whole blood, in restoring hemodynamic stability and reversing anaerobic metabolism caused by hemorrhage. Furthermore, pPolyHb improved oxygen supply and increased blood oxygen content...
February 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/26957687/six-percent-hetastarch-versus-lactated-ringer-s-solution-for-preloading-before-spinal-anesthesia-for-cesarean-section
#14
Madhusudan Upadya, Sonal Bhat, Seema Paul
BACKGROUND: Regional anesthesia has been the choice of preference for elective cesarean sections. This study was designed to determine whether preoperative administration of 6% hetastarch decreases the incidence of hypotension. MATERIALS AND METHODS: This study was conducted on 50 nonlaboring American Society of Anesthesiologists class I and II women undergoing elective cesarean section. Patients were randomly divided into two groups and were preloaded either with 1000 ml Ringer's lactate (RL) or 500 ml of 6% hetastarch 30 min prior to the surgery...
January 2016: Anesthesia, Essays and Researches
https://www.readbyqxmd.com/read/26909519/trials-in-adult-critical-care-that-show-increased-mortality-of-the-new-intervention-inevitable-or-preventable-mishaps
#15
James A Russell, Mark D Williams
Several promising therapies assessed in the adult critically ill in large, multicenter randomized controlled trials (RCTs) were associated with significantly increased mortality in the intervention arms. Our hypothesis was that there would be wide ranges in sponsorship (industry or not), type(s) of intervention(s), use of DSMBs, presence of interim analyses and early stopping rules, absolute risk increase (ARI), and whether or not adequate prior proof-of-principle Phase II studies were done of RCTs that found increased mortality rates of the intervention compared to control groups...
December 2016: Annals of Intensive Care
https://www.readbyqxmd.com/read/26680134/addition-of-low-dose-valproic-acid-to-saline-resuscitation-provides-neuroprotection-and-improves-long-term-outcomes-in-a-large-animal-model-of-combined-traumatic-brain-injury-and-hemorrhagic-shock
#16
Ihab Halaweish, Ted Bambakidis, Zhigang Chang, He Wei, Baoling Liu, Yongqing Li, Toby Bonthrone, Ashok Srinivasan, Tess Bonham, Kiril Chtraklin, Hasan B Alam
BACKGROUND: Combined traumatic brain injury (TBI) and hemorrhagic shock (HS) is highly lethal. In a nonsurvival model of TBI + HS, addition of high-dose valproic acid (VPA) (300 mg/kg) to hetastarch reduced brain lesion size and associated swelling 6 hours after injury; whether this would have translated into better neurologic outcomes remains unknown. It is also unclear whether lower doses of VPA would be neuroprotective. We hypothesized that addition of low-dose VPA to normal saline (NS) resuscitation would result in improved long-term neurologic recovery and decreased brain lesion size...
December 2015: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/26486711/hemodilution-therapy-for-lacunar-stroke-treatment-results-in-10-consecutive-cases
#17
J L Frey
Because precipitous neurological deterioration occurred during blood pressure reduction in a seminal case of lacunar infarction, nine subsequent patients with acute partial or evolving lacunar deficits were treated with hemodilution and blood pressure nonintervention to test the hypothesis that lacunar infarction represents perfusion failure. Isovolemic hemodilution was performed using hetastarch with target hematocrit of 30-33. Pretreatment brain computed tomography, carotid ultrasound, and echocardiography were normal...
1992: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/26220153/effects-of-in-vitro-hemodilution-with-crystalloids-colloids-and-plasma-on-canine-whole-blood-coagulation-as-determined-by-kaolin-activated-thromboelastography
#18
Bari R Morris, Armelle deLaforcade, Joyce Lee, Joseph Palmisano, Dawn Meola, Elizabeth Rozanski
OBJECTIVE: To investigate the effects of in vitro hemodilution with lactated Ringers solution (LRS), hetastarch (HES), and fresh frozen plasma (FFP) on whole blood coagulation in dogs as assessed by kaolin-activated thromboelastography. DESIGN: In vitro experimental study. SETTING: University teaching hospital. ANIMALS: Six healthy client-owned dogs. INTERVENTIONS: Whole blood was collected and diluted in vitro at a 33% and 67% dilution with either LRS, HES, or FFP...
January 2016: Journal of Veterinary Emergency and Critical Care
https://www.readbyqxmd.com/read/26191477/intra-operative-hydroxyethyl-starch-is-not-associated-with-post-craniotomy-hemorrhage
#19
James A Feix, C Andrew Peery, Tong J Gan, David S Warner, Michael L James, Ali Zomorodi, David L McDonagh
BACKGROUND: Intraoperative intravascular volume expansion with hydroxyethyl starch-based colloids is thought to be associated with an increased risk of post-craniotomy hemorrhage. Evidence for this association is limited. Associations between resuscitation with hydroxyethyl starch and risk of repeat craniotomy for hematoma evacuation were examined. METHODS: Using a retrospective cohort of neurosurgical patients at Duke University Medical Center between March 2005 and March 2012, patient characteristics were compared between those who developed post-craniotomy hemorrhage and those who did not...
2015: SpringerPlus
https://www.readbyqxmd.com/read/26103143/fluids-and-coagulation
#20
REVIEW
Sibylle A Kozek-Langenecker
PURPOSE OF REVIEW: Infusion therapy is essential in intravascular hypovolaemia and extravascular fluid deficits. Crystalloidal fluids and colloidal volume replacement affect blood coagulation when infused intravenously. The question remains if this side-effect of infusion therapy is clinically relevant in patients with and without bleeding manifestations, and if fluid-induced coagulopathy is a risk factor for anaemia, blood transfusion, and mortality, and a driver for resource use and costs...
August 2015: Current Opinion in Critical Care
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