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https://www.readbyqxmd.com/read/29344350/the-sensitivity-of-the-human-thirst-response-to-changes-in-plasma-osmolality-a-systematic-review
#1
REVIEW
Fintan Hughes, Monty Mythen, Hugh Montgomery
Background: Dehydration is highly prevalent and is associated with adverse cardiovascular and renal events. Clinical assessment of dehydration lacks sensitivity. Perhaps a patient's thirst can provide an accurate guide to fluid therapy. This systematic review examines the sensitivity of thirst in responding to changes in plasma osmolality in participants of any age with no condition directly effecting their sense of thirst. Methods: Medline and EMBASE were searched up to June 2017...
2018: Perioperative Medicine
https://www.readbyqxmd.com/read/29338996/incidence-and-predictors-of-postoperative-need-for-high-dose-inotropic-support-in-patients-undergoing-cardiac-surgery-for-infective-endocarditis
#2
Alessandro Belletti, Stephan Jacobs, Giovanni Affronti, Alexander Mladenow, Giovanni Landoni, Volkmar Falk, Felix Schoenrath
OBJECTIVE: Patients with infective endocarditis undergoing cardiac surgery are a high-risk population. Few data on incidence and predictors of need for high-dose inotropic support in this setting are currently available. DESIGN: Retrospective study. SETTING: Tertiary-care hospital. PARTICIPANTS: Ninety consecutive patients undergoing cardiac surgery for infective endocarditis. INTERVENTIONS: None...
December 11, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/29336676/vasopressors-in-sepsis
#3
Kristin P Colling, Kaysie L Banton, Greg J Beilman
BACKGROUND: Sepsis accounts for 10% of intensive care unit admissions and significant healthcare costs. Although the mortality rate from sepsis has been decreasing with better critical care, early identification of septic patients, and prompt interventions, the mortality rate remains 20%-30%. METHOD: Review of the English-language literature. RESULTS: Norepinephrine is the first-line vasopressor in shock and is associated with a lower mortality rate as well as fewer adverse effects...
January 16, 2018: Surgical Infections
https://www.readbyqxmd.com/read/29335859/arginine-vasopressin-aquaporin-2-pathway-mediated-dehydration-effects-of-electroacupuncture-in-guinea-pig-model-of-avp-induced-endolymphatic-hydrops
#4
Li-Yuan Jiang, Jiao-Jun He, Xi-Xi Chen, Xue-Jiao Sun, Xue-Zhong Wang, Shan Zhong, Hua-de Chen
OBJECTIVE: To investigate the effects of electroacupuncture (EA) on endolymphatic hydrops (EH) and the regulation of arginine vasopressin (AVP)-aquaporin-2 (AQP2) pathway in guinea pigs. METHODS: EH was induced in male guinea pigs by an intraperitoneal injection of AVP. For the treatment, EA was delivered to Baihui (GV 20) and Tinggong (SI 19) acupoints, once per day for 10 consecutive days. In histomorphological studies, cochlear hydrops degree was evaluated by hematoxylin-eosin (HE) staining, and then the ratio of scala media (SM) area to SM + scala vestibuli (SV) area (R value) was calculated...
January 15, 2018: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/29333830/-treatment-with-sublingual-desmopressin-in-two-infants-with-hydranencephaly-and-central-diabetes-insipidus
#5
Gustavo R Marín, Berta Baspineiro, Iris Vilca
Central diabetes insipidus is a rare disease in children caused by a deficiency of vasopressin. Its main clinical manifestations are polyuria and polydipsia. Brain malformations are one of the main causes. Desmopressin is the synthetic drug of choice for the treatment. One of the routes of administration is sublingual and its use in infants is very limited. We describe two infants with central diabetes insipidus and hydranencephaly who were successfully treated with sublingual desmopressin.
February 1, 2018: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/29333632/binding-of-cu-and-cu2-with-peptides-peptides-oxytocin-arg8-vasopressin-bradykinin-angiotensin-i-substance-p-somatostatin-and-neurotensin
#6
Thankan Jayasekharan, Shyam L Gupta, Vikas Dhiman
The intrinsic binding ability of seven natural peptides (oxytocin, arg8 -vasopressin, bradykinin, angiotensin-I, substance-P, somatostatin, and neurotensin) with copper in two different oxidation states (CuI/II ) derived from different Cu+/2+ precursor sources have been investigated for their charge dependent binding characteristics. The peptide-CuI/II complexes, [M - (n-1)H + nCuI ] and [M - (2n-1)H + nCuII ] are prepared/generated by the reaction of peptides with CuI solution/Cu-target and CuSO4 solution, and are analyzed using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOFMS)...
January 15, 2018: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/29333621/characterization-of-mouse-neuro-urological-dynamics-in-a-novel-decerebrate-arterially-perfused-mouse-dapm-preparation
#7
Hiroki Ito, Marcus J Drake, Christopher H Fry, Anthony J Kanai, Anthony E Pickering
AIM: To develop the decerebrate arterially perfused mouse (DAPM) preparation, a novel voiding model of the lower urinary tract (LUT) that enables in vitro-like access with in vivo-like neural connectivity. METHODS: Adult male mice were decerebrated and arterially perfused with a carbogenated, Ringer's solution to establish the DAPM. To allow distinction between central and peripheral actions of interventions, experiments were conducted in both the DAPM and in a "pithed" DAPM which has no brainstem or spinal cord control...
January 15, 2018: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/29332515/vasoplegia-in-patients-with-sepsis-and-septic-shock-pathways-and-mechanisms
#8
A-M Burgdorff, M Bucher, J Schumann
Sepsis is one of the most frequent causes of death among patients in intensive care units. Many therapeutic strategies have been assessed without the desired success rates. A key risk factor for death is hypotension due to vasodilatation with vascular hyposensitivity. However, the pathways underlying this process remain unclear. Endotoxemia induces inflammatory mediators, and this is followed by vasoplegia and decreased cardiac contractility. Although inhibition of these mediators diminishes mortality rates in animal models, this phenomenon has not been confirmed in humans...
January 1, 2018: Journal of International Medical Research
https://www.readbyqxmd.com/read/29330663/human-cytomegalovirus-encoded-mir-ul112-contributes-to-hcmv-mediated-vascular-diseases-by-inducing-vascular-endothelial-cell-dysfunction
#9
Kai Shen, Liyun Xu, Dongdong Chen, Weiguo Tang, Yanyan Huang
Human cytomegalovirus (HCMV) infection has been linked to the pathogenesis of vasculopathy by inducing dysfunction of vascular cells such as endothelial cells. Hcmv-miR-UL112 is the most well-characterized HCMV-encoded microRNA occurring in the plasma of patients with cardiovascular diseases such as hypertension, while the specific underlying pathophysiological mechanisms are yet to be defined. The current study investigated the effect of hcmv-miR-UL112 on the growth and proliferation of human umbilical vascular endothelial cells (HUVECs); it might also be associated with signaling pathways...
January 12, 2018: Virus Genes
https://www.readbyqxmd.com/read/29329694/management-of-refractory-vasodilatory-shock
#10
REVIEW
Jacob C Jentzer, Saraschandra Vallabhajosyula, Ashish K Khanna, Lakhmir S Chawla, Laurence W Busse, Kianoush B Kashani
Refractory shock is a lethal manifestation of cardiovascular failure defined by an inadequate hemodynamic response to high doses of vasopressor medications. Approximately 7% of critically ill patients will develop refractory shock, with short-term mortality exceeding 50%. Refractory vasodilatory shock develops from uncontrolled vasodilation and vascular hyporesponsiveness to endogenous vasoconstrictors, causing failure of physiologic vasoregulatory mechanisms. Standard approaches to initial management of shock include fluid resuscitation and initiation of norepinephrine...
January 9, 2018: Chest
https://www.readbyqxmd.com/read/29328496/hypotension-risk-based-on-vasoactive-agent-discontinuation-order-in-patients-in-the-recovery-phase-of-septic-shock
#11
Gretchen L Sacha, Simon W Lam, Abhijit Duggal, Heather Torbic, Anita J Reddy, Seth R Bauer
STUDY OBJECTIVES: Patients with septic shock often require vasoactive agents for hemodynamic support; however, the optimal approach to discontinuing these agents once patients reach the recovery phase is currently unknown. The objective of this evaluation was to compare the incidence of hypotension within 24 hours based on the discontinuation order of norepinephrine (NE) and vasopressin (AVP) in patients in the recovery phase of septic shock. DESIGN: Retrospective cohort study...
January 12, 2018: Pharmacotherapy
https://www.readbyqxmd.com/read/29319721/microcirculation-improvement-after-short-term-infusion-of-vasopressin-in-septic-shock-is-dependent-on-noradrenaline
#12
Ana Paula Metran Nascente, Flávio Geraldo Rezende Freitas, Jan Bakker, Antônio Tonete Bafi, Renata Teixeira Ladeira, Luciano Cesar Pontes Azevedo, Alexandre Lima, Flavia Ribeiro Machado
OBJECTIVES: To assess the impact of vasopressin on the microcirculation and to develop a predictive model to estimate the probability of microcirculatory recruitment in patients with septic shock. METHODS: This prospective interventional study included patients with septic shock receiving noradrenaline for less than 48 hours. We infused vasopressin at 0.04 U/min for one hour. Hemodynamic measurements, including sidestream dark-field imaging, were obtained immediately before vasopressin infusion, 1 hour after vasopressin infusion and 1 hour after vasopressin withdrawal...
December 2017: Clinics
https://www.readbyqxmd.com/read/29318728/diagnosis-and-management-of-hyponatraemia-in-the-older-patient
#13
REVIEW
Michael Woodward, Peter Gonski, Mathis Grossmann, John Obeid, Ron Scholes, Duncan J Topliss
Hyponatraemia (serum sodium concentration below 135 mmol/L) is the most common electrolyte disturbance and occurs commonly in older people. The causes can be complex to diagnose and treat and many published guidelines do not focus on the issues in an older patient group. Here, we are principally concerned with diagnosis and management of euvolaemic and hypervolaemic hyponatraemia in hospitalised patients over 70 years old. We also aim to increase awareness of hyponatraemia in residential aged care facilities and the community...
January 2018: Internal Medicine Journal
https://www.readbyqxmd.com/read/29311539/tolvaptan-for-fluid-management-in-living-donor-liver-transplant-recipients
#14
Shunichi Imai, Masahiro Shinoda, Hideaki Obara, Minoru Kitago, Taizo Hibi, Yuta Abe, Hiroshi Yagi, Kentaro Matsubara, Hisanobu Higashi, Osamu Itano, Yuko Kitagawa
BACKGROUND Tolvaptan, an antagonist of the vasopressin V2 receptor is a novel oral diuretic that promotes water excretion selectively. We have used furosemide as a primary diuretic and added human atrial natriuretic peptide (hANP) if necessary for fluid management postoperatively in living-donor liver transplantation (LDLT) recipients. Recently we introduced tolvaptan and used both tolvaptan and furosemide as primary diuretics. MATERIAL AND METHODS Clinical outcomes were compared between LDLT recipients whose postoperative fluid management was performed before (control group, n=10) and after (tolvaptan group, n=16) introduction of tolvaptan...
January 9, 2018: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/29310997/neurohormonal-imbalance-a-neglected-problem-and-potential-therapeutic-target-in-acute-heart-failure
#15
Steven R Goldsmith, Bradley A Bart, Ileana L Piña
Decompensated or acute heart failure (AHF) is characterized by increased ventricular and atrial pressures which may lead to and be caused by circulatory congestion. Unless due to a primary decrease in cardiac function, congestion arises from volume expansion or vasoconstriction. In turn, volume expansion and vasoconstriction are due to neurohormonal imbalance since both result from activation of the sympathetic nervous system, the renin-angiotensin-aldosterone axis and excess secretion of arginine vasopressin...
December 16, 2017: Current Problems in Cardiology
https://www.readbyqxmd.com/read/29309996/biomarker-discovery-for-disease-status-and-symptom-severity-in-children-with-autism
#16
Ozge Oztan, Lisa P Jackson, Robin A Libove, Raena D Sumiyoshi, Jennifer M Phillips, Joseph P Garner, Antonio Y Hardan, Karen J Parker
Autism spectrum disorder (ASD) is characterized by social impairments and repetitive behaviors, and affects 1 in 68 US children. Despite ASD's societal impact, its disease mechanisms remain poorly understood. Recent preclinical ASD biomarker discovery research has implicated the neuropeptides oxytocin (OXT) and arginine vasopressin (AVP), and their receptors, OXTR and AVPR1A, in animal models. Efforts to translate these findings to individuals with ASD have typically involved evaluating single neuropeptide measures as biomarkers of ASD and/or behavioral functioning...
December 28, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29306965/differential-activation-of-arginine-vasopressin-receptor-subtypes-in-the-amygdaloid-modulation-of-anxiety-in-the-rat-by-arginine-vasopressin
#17
Oscar René Hernández-Pérez, Minerva Crespo-Ramírez, Yordanka Cuza-Ferrer, José Anias-Calderón, Limei Zhang, Gabriel Roldan-Roldan, Raúl Aguilar-Roblero, Dasiel O Borroto-Escuela, Kjell Fuxe, Miguel Perez de la Mora
RATIONALE: The amygdala plays a paramount role in the modulation of anxiety and numerous studies have shown that arginine vasopressin (AVP) elicits anxiogenic effects following either its systemic or septal administration. OBJECTIVES: The aim of this paper was to study the involvement of vasopressinergic neurotransmission in the amygdaloid modulation of unconditioned anxiety and to ascertain whether or not AVP receptor subtypes may have a differential role in this modulation...
January 7, 2018: Psychopharmacology
https://www.readbyqxmd.com/read/29302194/in-vitro-binding-and-receptor-mediated-activity-of-terlipressin-at-vasopressin-receptors-v1-and-v2
#18
Khurram Jamil, Stephen Chris Pappas, Krishna R Devarakonda
Terlipressin, a synthetic, systemic vasoconstrictor with selective activity at vasopressin-1 (V1) receptors, is a pro-drug for the endogenous/natural porcine hormone [Lys8]-vasopressin (LVP). We investigated binding and receptor-mediated cellular activities of terlipressin, LVP, and endogenous human hormone [Arg8]-vasopressin (AVP) at V1 and vasopressin-2 (V2) receptors. Cell membrane homogenates of Chinese hamster ovary cells expressing human V1 and V2 receptors were used in competitive binding assays to measure receptor-binding activity...
2018: Journal of Experimental Pharmacology
https://www.readbyqxmd.com/read/29297709/utilization-and-budget-impact-of-tolvaptan-in-the-inpatient-setting-among-patients-with-heart-failure-and-hyponatremia
#19
Alpesh N Amin, Jesse D Ortendahl, Amanda L Harmon, Siddhesh A Kamat, Robert A Stellhorn, Sandra L Chase, Shirin V Sundar
OBJECTIVE: Assess characteristics of patients with heart failure (HF) and hyponatremia (HN) using tolvaptan, a selective vasopressin V2-receptor antagonist, for sodium correction, and estimate the budget impact of tolvaptan use in a hospital. METHODS: The Premier Hospital Database was analyzed to assess the utilization of tolvaptan, characteristics of users and non-users, and hospitalization costs among patients with HF and HN. Using these findings, a model was developed to estimate tolvaptan costs in proportion to total medical costs of managing patients with HF and HN, and the budget impact of tolvaptan use...
January 3, 2018: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/29290743/use-of-vasopressin-in-neonatal-intensive-care-unit-patients-with-hypotension
#20
Mengwei Ni, Jeffrey R Kaiser, Brady S Moffett, Christopher J Rhee, Jennifer Placencia, Kimberly L Dinh, Joseph L Hagan, Danielle R Rios
OBJECTIVE: To evaluate the safety and efficacy of vasopressin for the treatment of hypotension in patients admitted to neonatal intensive care units (NICUs). METHODS: Vasopressin use in 69 infants admitted to our NICU between 2011 and 2014 was examined. Data evaluated included demographics; serum creatinine, sodium, and lactate concentrations; urine output; and systolic, diastolic, and mean blood pressures (BPs). Parameters prior to vasopressin use were compared to those at maximum dose...
November 2017: Journal of Pediatric Pharmacology and Therapeutics: JPPT: the Official Journal of PPAG
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