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https://www.readbyqxmd.com/read/28818484/the-physiology-of-submaximal-exercise-the-steady-state-concept
#1
REVIEW
Guido Ferretti, Nazzareno Fagoni, Anna Taboni, Paolo Bruseghini, Giovanni Vinetti
The steady state concept implies that the oxygen flow is invariant and equal at each level along the respiratory system. The same is the case with the carbon dioxide flow. This condition has several physiological consequences, which are analysed. First, we briefly discuss the mechanical efficiency of exercise and the energy cost of human locomotion, as well as the roles played by aerodynamic work and frictional work. Then we analyse the equations describing the oxygen flow in lungs and in blood, the effects of ventilation and of the ventilation - perfusion inequality, and the interaction between diffusion and perfusion in the lungs...
August 14, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28816176/-severely-increased-serum-lipid-levels-in-diabetic-ketoacidosis-case-report
#2
Hrafnkell Stefansson, Kristinn Sigvaldason, Hilmar Kjartansson, Helga Águsta Sigurjonsdottir
Severe hypertriglyceridemia is a known, but uncommon complication of diabetic ketoacidosis. We discuss the case of a 23-year-old, previously healthy, woman who initially presented to the emergency department with abdominal pain. Grossly lipemic serum due to extremely high triglyceride (38.6 mmol/L) and cholesterol (23.2 mmol/L) levels were observed with a high blood glucose (23 mmol/L) and a low pH of 7.06 on a venous blood gas. She was treated successfully with fluids and insulin and had no sequale of pancreatitis or cerebral edema...
July 2017: Læknablađiđ
https://www.readbyqxmd.com/read/28812394/the-use-of-sustained-low-efficiency-dialysis-sled-in-massive-paracetamol-overdose
#3
Anselm Wong, Roger L K Tong, Liam Ryan, Tim Crozier, Andis Graudins
CONTEXT: Massive paracetamol ingestion causing mitochondrial dysfunction is uncommon. Use of sustained low-efficiency dialysis (SLED) to improve acidaemia and enhance paracetamol elimination has not been previously described. CASE DETAILS: A 44-year-old male presented to the emergency department 2.5 hours post overdose of 200 g (2.5 g/kg) of paracetamol. Examination revealed a BP 85/60 mmHg, pulse 112 bpm, temperature 33.9 °C and blood glucose of 13...
August 16, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28807726/the-value-of-venous-blood-gas-analysis-in-the-diagnosis-of-diabetic-ketoacidosis
#4
Jawad Ibrahim Rasheed, Manal Khudder Abdul Razak, Ahmed Amer Abdul Hussein
BACKGROUND & AIM: Newer blood gas analyzers have the ability to report electrolyte values and glucose in addition to pH, so this diagnostic process could be condensed in diagnosing diabetic ketoacidosis (DKA). We aimed to assess the accuracy of the venous blood gas (VBG) analysis with electrolytes for diagnosing DKA. METHODS: This study prospectively identified a convenience sample of (60 patients) presented with DKA and tested their VBG and serum electrolytes. The diagnosis of DKA was made according to American Diabetes Association criteria...
June 15, 2017: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/28806492/evaluation-of-gastric-and-bladder-tonometry-as-indicators-of-tissue-perfusion-in-induced-hypotension-in-dogs
#5
Juan Morgaz, Lidia Espigares-Rodríguez, Pilar Muñoz-Rascón, Rocío Navarrete, Jose Andrés Fernández-Sarmiento, María Del Mar Granados Machuca
OBJECTIVE: To evaluate the use of gastric (PgCO2 ) and bladder (PbCO2 ) tonometry for assessing tissue hypoperfusion in dogs during sevoflurane-induced hypotension, and to compare these measurements with delivery of oxygen, arterial oxygen content, and plasma lactate concentration. DESIGN: Prospective experimental trial. SETTING: University veterinary teaching hospital. ANIMALS: Fourteen adult Beagle dogs. INTERVENTIONS: Anesthetic induction was performed by mask with sevoflurane and oxygen...
August 14, 2017: Journal of Veterinary Emergency and Critical Care
https://www.readbyqxmd.com/read/28795015/laboratory-reference-intervals-for-systolic-blood-pressure-rectal-temperature-haematology-biochemistry-and-venous-blood-gas-and-electrolytes-in-healthy-pet-rabbits
#6
Miguel Gallego
Prospective data from 86 healthy pet rabbits were evaluated to establish reference intervals for hematology, biochemistry, urinalysis, venous blood gas and electrolytes, rectal temperature and systolic blood pressure. Reference intervals for rectal temperature (37.4-39.6 ºC) and systolic blood pressure (75-134 mm/Hg) were previously unreported in pet rabbits. Differences by more than 30% with reference intervals present in the bibliography were observed in the blood biochemistry and urinalysis, being attributed to the variability in methodological factors with the present study...
2017: Open veterinary journal
https://www.readbyqxmd.com/read/28774830/a-physiologically-based-toxicokinetic-model-for-inhaled-ethylene-and-ethylene-oxide-in-mouse-rat-and-human
#7
Johannes Georg Filser, Dominik Klein
The olefin ethylene (ET) is the largest volume organic chemical. Mammals metabolize ET to ethylene oxide (EO), another important industrial chemical. The epoxide alkylates hemoglobin (Hb) and DNA and has mutagenic and carcinogenic properties. In order to estimate the EO burden in mice, rats, and humans resulting from inhalation exposure to gaseous ET or EO, a physiological toxicokinetic model was developed. It consists of the compartments lung, richly perfused tissues, kidneys, muscle, fat, arterial blood, venous blood, and liver containing the sub-compartment endoplasmic reticulum...
July 31, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28766276/impact-of-membrane-lung-surface-area-and-blood-flow-on-extracorporeal-co2-removal-during-severe-respiratory-acidosis
#8
Christian Karagiannidis, Stephan Strassmann, Daniel Brodie, Philine Ritter, Anders Larsson, Ralf Borchardt, Wolfram Windisch
BACKGROUND: Veno-venous extracorporeal CO2 removal (vv-ECCO2R) is increasingly being used in the setting of acute respiratory failure. Blood flow rates through the device range from 200 ml/min to more than 1500 ml/min, and the membrane surface areas range from 0.35 to 1.3 m(2). The present study in an animal model with similar CO2 production as an adult patient was aimed at determining the optimal membrane lung surface area and technical requirements for successful vv-ECCO2R. METHODS: Four different membrane lungs, with varying lung surface areas of 0...
December 2017: Intensive Care Medicine Experimental
https://www.readbyqxmd.com/read/28758199/point-of-care-measurement-of-fetal-blood-lactate-time-to-trust-a-new-device
#9
Mandy Wang, Seng C Chua, Lilain Bouhadir, Erin L Treadwell, Emma Gibbs, Therese M McGee
BACKGROUND: Point-of-care lactate devices are used worldwide for intrapartum decision making. Current practice is often based on Lactate Pro (Arkray) but its imminent product discontinuation necessitates determination of an optimal replacement device. AIMS: To evaluate the performance of Lactate Pro and two other point-of-care devices, Lactate Pro 2 (Arkray) and StatStrip (Nova Biomedical), and to derive scalp lactate cut-offs equivalent to the current intervention trigger of >4...
July 31, 2017: Australian & New Zealand Journal of Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/28742518/severe-hypertriglyceridemia-at-new-onset-type-1-diabetes-mellitus
#10
Tyler Fick, Julie Jack, Amy L Pyle-Eilola, Rohan K Henry
BACKGROUND: Severe hypertriglyceridemia (HTG) as well as diabetic ketoacidosis (DKA) are complications of type 1 diabetes (T1DM). HTG is an exceedingly rare complication in the pediatric population and herein we report a case of HTG at new-onset T1DM in DKA and discuss management and potential complications. CASE PRESENTATION: An 11-year-old previously well patient with a history of fatigue and weight loss presented with: glucose >600 mg/dL, venous blood gas: pH 7...
August 28, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28738216/early-time-related-course-of-image-findings-in-postmortem-mri-typical-findings-and-observer-agreement-in-a-porcine-model
#11
Frank Oliver Henes, Marc Regier, Peter Bannas, Marlen Henker, Axel Heinemann, Jan Sperhake, Philipp G C Begemann, Gerhard Adam, Michael Groth
PURPOSE: To assess early time-related image findings in postmortem magnetic resonance imaging (MRI) and to evaluate observer agreement in a porcine model. MATERIAL AND METHODS: Three pigs were examined by MRI at 15 different time points in the first 36h after death. Two observers independently recorded the postmortem interval (PMI) to the appearance of fluid collection (pleural space, interlobar and interlobular pulmonary fissures and hepatic interlobar fissures), gas accumulation (intrahepatic and intracardial) and blood clotting (aorta and intrahepatic venous vessels)...
July 15, 2017: Legal Medicine
https://www.readbyqxmd.com/read/28734854/pulse-pressure-variation-as-a-guide-for-volume-expansion-in-dogs-undergoing-orthopedic-surgery
#12
Denise T Fantoni, Keila K Ida, André M Gimenes, Matheus M Mantovani, Jacqueline R Castro, Geni C F Patrício, Aline M Ambrósio, Denise A Otsuki
OBJECTIVE: To investigate whether pulse pressure variation (PPV) can predict fluid responsiveness in healthy dogs during clinical surgery. STUDY DESIGN: Prospective clinical study. ANIMALS: Thirty-three isoflurane-anesthetized dogs with arterial hypotension during orthopedic surgery. METHODS: Fluid challenge with lactated Ringer's solution (15 mL kg(-1) in 15 minutes) was administered in mechanically ventilated dogs (tidal volume 10 mL kg(-1)) with hypotension [mean arterial pressure (MAP) < 65 mmHg]...
March 22, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28711257/seasonal-and-maternal-effects-on-acid-base-l-lactate-electrolyte-and-hematological-status-of-205-dairy-calves-born-to-eutocic-dams
#13
L Kovács, F L Kézér, E Albert, F Ruff, O Szenci
In this study, we used linear mixed models to determine the effects of season, time of sampling relative to birth (factors), duration of the delivery process, duration of maternal grooming, calf body weight (BW) at birth, and time of day (covariates) on values of venous blood gas, acid-base and electrolyte parameters, and l-lactate concentrations in dairy calves born to eutocic dams in summer (SUM, n = 101) and winter (WIN, n = 104). Neonatal vitality was assessed at 0, 1, and 24 h after delivery in a linear scoring system using muscle tone, erection of the head, muscle reflexes, heart rate, and sucking drive as criteria...
September 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28694729/the-alcohol-used-for-cleansing-the-venipuncture-site-does-not-jeopardize-blood-and-plasma-alcohol-measurement-with-head-space-gas-chromatography-and-an-enzymatic-assay
#14
Giuseppe Lippi, Ana-Maria Simundic, Giacomo Musile, Elisa Danese, Gianluca Salvagno, Franco Tagliaro
INTRODUCTION: This study aimed to establish whether an alcoholic antiseptic, wiped or not before venipuncture, may jeopardize alcohol testing with a commercial enzymatic assay and a reference head-space gas chromatography (GC) technique. MATERIALS AND METHODS: Venous blood was collected from 23 healthy volunteers, with two sequential procedures. In the first blood collection, 2 mL of alcoholic antiseptic (0.5% chlorhexidine, 70% ethanol) were place on a gauge pad, the venipuncture site of right arm was cleaned but the antiseptic was not let to dry before phlebotomy...
June 15, 2017: Biochemia Medica: časopis Hrvatskoga Društva Medicinskih Biokemičara
https://www.readbyqxmd.com/read/28671107/volatile-compounds-in-blood-headspace-and-nasal-breath
#15
Brian M Ross, Randa Babgi
Breath analysis is a form of metabolomics that utilises the identification and quantification of volatile chemicals to provide information about physiological or pathological processes occurring within the body. An inherent assumption of such analyses is that the concentration of the exhaled gases correlates with the concentration of the same gas in the tissue of interest. In this study we have investigated this assumption by quantifying some volatile compounds in peripheral venous blood headspace, and in nasal breath collected in Tedlar bags obtained at the same time from 30 healthy volunteers, prior to analysis by Selected Ion Flow Tube Mass Spectrometry...
July 3, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28666929/fluid-responsiveness-after-cardiac-surgery-fracas-a-prospective-observational-study-using-peripheral-near-infrared-spectroscopy
#16
Ethan Butler, John Nguyen, Sajeev Mahendran, Anders Aneman
OBJECTIVES: To describe tissue oxygen saturation (StO2) in response to a vascular occlusion test using thenar eminence and forearm near-infrared spectroscopy (NIRS) and the association with volume responsiveness after cardiac surgery. DESIGN: Single-center, prospective, observational cohort study. SETTING: Cardiothoracic intensive care unit. PARTICIPANTS: Seventy-six post-cardiac surgical adults. INTERVENTIONS: Immediately before and 10 minutes after a 250-to-500 mL fluid bolus, StO2 was measured in response to a vascular occlusion test to calculate tissue deoxygenation (Rdes) and reoxygenation (Rres) rates...
March 18, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28643320/revised-protocol-of-extracorporeal-membrane-oxygenation-ecmo-therapy-in-severe-ards-recommendations-of-the-veno-venous-ecmo-expert-panel-appointed-in-february-2016-by-the-national-consultant-on-anesthesiology-and-intensive-care
#17
Romuald Lango, Zbigniew Szkulmowski, Dariusz Maciejewski, Andrzej Sosnowski, Krzysztof Kusza
Extracorporeal Membrane Oxygenation (ECMO) has become well established technique of the treatment of severe acute respiratory failure (Veno-Venous ECMO) or circulatory failure (Veno-Arterial ECMO) which enables effective blood oxygenation and carbon dioxide removal for several weeks. Veno-Venous ECMO (V-V ECMO ) is a lifesaving treatment of patients in whom severe ARDS makes artificial lung ventilation unlikely to provide satisfactory blood oxygenation for preventing further vital organs damage and progression to death...
2017: Anaesthesiology Intensive Therapy
https://www.readbyqxmd.com/read/28642298/does-acid-base-equilibrium-correlate-with-remnant-liver-volume-during-stepwise-liver-resection
#18
Mohammad Golriz, Sepehr Abbasi, Parham Fathi, Ali Majlesara, Thorsten Brenner, Arianeb Mehrabi
Small for size and flow syndrome (SFSF) is one of the most challenging complications following extended hepatectomy (EH). After EH, hepatic artery flow decreases and portal vein flow increases per 100 gram remnant liver volume (RLV). This causes hypoxia followed by metabolic acidosis. A correlation between acidosis and post-hepatectomy liver failure has been postulated, but not studied systematically in a large animal model or clinical setting. In our study, we performed stepwise liver resections on nine pigs to defined SFSF limits as follows: step 1: segment II/III resection, step 2: segment IV resection, step 3: segment V/VIII resection (RLV: 75%, 50% and 25% respectively)...
June 22, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28629872/sevoflurane-relieves-lung-function-deterioration-after-cardiopulmonary-bypass
#19
Adam L Balogh, Ferenc Peták, Gergely H Fodor, Roberta Sudy, Barna Babik
OBJECTIVE: To investigate sevoflurane's potential to alleviate the detrimental pulmonary changes after cardiopulmonary bypass (CPB). DESIGN: Prospective, randomized clinical investigation. SETTING: University hospital. PARTICIPANTS: One hundred ninety patients undergoing elective cardiac surgery. INTERVENTIONS: Ninety-nine patients under intravenous anesthesia were administered 1 minimal alveolar concentration of sevoflurane for 5 minutes after being weaned from CPB (group SEV); intravenous anesthesia was maintained in the other 91 patients (group CTRL)...
February 24, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28627349/-clinical-application-of-cardiopulmonary-resuscitation-with-abdominal-lifting-and-compression-in-emergency-treatment
#20
Jie Wang, Guolan Wu, Ronghua Yang, Yonghong Wang, Shunping Wang, Honglin Li, Shouhui Wang, Manguo Zhao, Xusheng Li, Yan Peng
OBJECTIVE: To investigate the clinical value of cardiopulmonary resuscitation (CPR) with abdominal lifting and compression on patients with breathing and cardiac arrest induced by severe chest trauma. METHODS: Sixty-six breathing and cardiac arrest patients induced by severe chest trauma admitted to the General Hospital of Jingyuan Coal Industry Group Company from October 2011 to October 2016 were enrolled, and they were divided into abdominal lifting and compression group (n = 32) and unarmed abdominal compression group (n = 34) by random number table...
March 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
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