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body plethysmography

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https://www.readbyqxmd.com/read/28445454/body-composition-at-birth-and-its-relationship-with-neonatal-anthropometric-ratios-the-newborn-body-composition-study-of-the-intergrowth-21st-project
#1
José Villar, Fabien A Puglia, Tanis R Fenton, L Cheikh Ismail, Eleonora Staines-Urias, Francesca Giuliani, Eric O Ohuma, Cesar G Victora, Peter Sullivan, Fernando C Barros, Ann Lambert, Aris T Papageorghiou, Roseline Ochieng, Yasmin A Jaffer, Douglas G Altman, Alison J Noble, Michael G Gravett, Manorama Purwar, Ruyan Pang, Ricardo Uauy, Stephen H Kennedy, Zulfiqar A Bhutta
BACKGROUND: We aimed to describe newborn body composition and identify which anthropometric ratio (weight/length; BMI; or ponderal index, PI) best predicts fat mass (FM) and fat-free mass (FFM). METHODS: Air-displacement plethysmography (PEA POD) was used to estimate FM, FFM and body fat percentage (BF%). Associations between FFM, FM and BF% and weight/length, BMI and PI were evaluated in 1,019 newborns using multivariate regression analysis. Charts for FM, FFM and BF% were generated using a prescriptive sub-sample (n=247)...
April 26, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28442444/hydrogen-sulfide-ameliorates-prenatal-cigarette-smoke-exposure-induced-impairment-of-respiratory-responses-to-hypercapnia-in-neonatal-rats
#2
Senfeng Zhang, Fang Lei, Fusheng Zhao, Xiang Yan, Wen Wang, Yu Zheng
The present study was designed to investigate whether H2S could improve the respiratory responses to hypercapnia blunted by prenatal CSE in neonatal rats in vivo. Respiratory activities were recorded with head-out body plethysmography. The results showed that during baseline, respiratory frequency (FR), tidal volume (VT) and minute ventilation (VE) were similar among tested groups; frequency of spontaneous apnea (FSA), not post-sigh apnea (FPA), was significantly elevated by prenatal CSE. During hypercapnia, the increases in FR and VE were significantly reduced, but VT was not markedly different, in CSE group; both FSA and FPA were decreased, although FSA remained higher in CSE group...
April 22, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28432267/assessment-of-lung-function-in-a-large-cohort-of-patients-with-acromegaly
#3
Sylvere Störmann, Bodo Gutt, Josefine Roemmler-Zehrer, Martin Bidlingmaier, Rudolf Maria Huber, Jochen Schopohl, Matthias Angstwurm
OBJECTIVE: Acromegaly is associated with increased mortality due to respiratory disease. To date, lung function in patients with acromegaly has only been assessed in small studies, with contradicting results. We assessed lung function parameters in a large cohort of patients with acromegaly. DESIGN: Lung function of acromegaly patients was prospectively assessed using spirometry, blood gas analysis and body plethysmography. Biochemical indicators of acromegaly were assessed through measurement of growth hormone and IGF-I levels...
April 21, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28422940/body-composition-at-birth-and-height-at-2-years-a-prospective-cohort-study-among-children-in-jimma-ethiopia
#4
Bitiya Admassu, Jonatan C Wells, Tsinuel Girma, Gregers S Andersen, Victor Owino, Tefera Belachew, Kim F Michaelsen, Mubarek Abera, Rasmus Wibaek, Henrik Friis, Pernille Kæstel
BACKGROUND: Low birth weight is associated with childhood stunting, but equivalent associations for birth body composition (BC) remain unknown. OBJECTIVE: To assess associations of BC with height-for-age Z score (HAZ) at 2 years of age. METHODS: In a prospective cohort study, fat mass (FM) and fat-free mass (FFM) were measured using air-displacement plethysmography within 48 h of birth. Linear regression models were applied to study the relationship between BC at birth and HAZ at 24 months (±3 months)...
April 19, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28418337/a-simple-measure-to-assess-hyperinflation-and-air-trapping-1-forced-expiratory-volume-in-three-second-forced-vital-capacity
#5
Sermin Börekçi, Tunçalp Demir, Aslı Görek Dilektaşlı, Melahat Uygun, Nurhayat Yıldırım
BACKGROUND: Several recent studies have suggested that 1 minus-forced expiratory volume expired in 3 seconds / forced vital capacity (1-FEV3/FVC) may be an indicator of distal airway obstruction and a promising measure to evaluate small airways dysfunction. AIMS: To investigate the associations of 1-FEV3/FVC with the spirometric measures and lung volumes that assess small airways dysfunction and reflects hyperinflation and air trapping. STUDY DESIGN: Retrospective cross-sectional study...
April 5, 2017: Balkan Medical Journal
https://www.readbyqxmd.com/read/28394547/influence-of-male-obesity-on-fertility
#6
Miro Kasum, Sonja Anić-Jurica, Ermin Čehić, Tajana Klepac-Pulanić, Josip Juras, Kristina Žužul
The aim of this review is to analyze current diagnostic approaches to obesity in adult men, the potential mechanisms linking obesity to infertility, and treatment options aimed at improving reproductive health. Obesity has become a worldwide epidemic with the estimated prevalence increasing from 28.8% to 36.9% between 1980 and 2013. In terms of diagnosis, numerous simple techniques have been developed including body mass index, waist to hip ratio, waist circumference, bioelectrical impedance analysis, ultrasound and skinfold measurements...
June 2016: Acta Clinica Croatica
https://www.readbyqxmd.com/read/28389725/estimation-of-human-body-volume-bv-from-anthropometric-measurements-based-on-three-dimensional-3d-scan-technique
#7
Xingguo Liu, Jianwei Niu, Linghua Ran, Taijie Liu
BACKGROUND: This study aimed to develop estimation formulae for the total human body volume (BV) of adult males using anthropometric measurements based on a three-dimensional (3D) scanning technique. Noninvasive and reliable methods to predict the total BV from anthropometric measurements based on a 3D scan technique were addressed in detail. METHODS: A regression analysis of BV based on four key measurements was conducted for approximately 160 adult male subjects...
April 7, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28382898/impact-of-food-and-fluid-intake-on-technical-and-biological-measurement-error-in-body-composition-assessment-methods-in-athletes
#8
Ava Kerr, Gary J Slater, Nuala Byrne
Two, three and four compartment (2C, 3C and 4C) models of body composition are popular methods to measure fat mass (FM) and fat-free mass (FFM) in athletes. However, the impact of food and fluid intake on measurement error has not been established. The purpose of this study was to evaluate standardised (overnight fasted, rested and hydrated) v. non-standardised (afternoon and non-fasted) presentation on technical and biological error on surface anthropometry (SA), 2C, 3C and 4C models. In thirty-two athletic males, measures of SA, dual-energy X-ray absorptiometry (DXA), bioelectrical impedance spectroscopy (BIS) and air displacement plethysmography (BOD POD) were taken to establish 2C, 3C and 4C models...
February 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28365577/submaximal-exercise-capacity-in-juvenile-dermatomyositis-after-longterm-disease-the-contribution-of-muscle-lung-and-heart-involvement
#9
Kristin Schjander Berntsen, Anita Tollisen, Thomas Schwartz, Eva Kirkhus, Trond Mogens Aaløkken, May Brit Lund, Berit Flatø, Ivar Sjaastad, Helga Sanner
OBJECTIVE: To compare submaximal exercise capacity in patients with juvenile dermatomyositis (JDM) with controls, and analyze contributions of muscle, heart, and lung impairment in patients. METHODS: Fifty-nine patients with JDM, with a mean 16.9 years after symptom onset, and 59 sex- and age-matched controls completed a 6-min walk test (6MWT) and a timed up and go (TUG) test. Muscle function, disease activity/damage, and health-related quality of life (HRQOL) were assessed by validated tools; heart function by echocardiography and electrocardiography; and lung function by spirometry, DLCO, and body plethysmography...
April 1, 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/28363683/validity-of-thoracic-respiratory-inductive-plethysmography-in-high-body-mass-index-subjects
#10
Yann Rétory, Pascal David, Carole de Picciotto, Pauline Niedzialkowski, Marcel Bonay, Michel Petitjean
We aim to evaluate thoracic respiratory inductive plethysmography (RIP) in high body mass index (BMI) subjects with a pneumotachometer (PT) as a reference. We simultaneously evaluated spontaneous breathing by RIP and PT in 10 low and 10 high BMI subjects at rest and in moderate exercise. We then recorded RIP amplitude with different excursions mimicking respiratory thoracic deformation, with different sizes of RIP belts surrounding cylinders of different perimeters with or without deformable foam simulating adipose tissue...
March 28, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28352168/positive-correlation-of-airway-resistance-and-serum-asymmetric-dimethylarginine-level-in-copd-patients-with-systemic-markers-of-low-grade-inflammation
#11
Gabor Tajti, Rudolf Gesztelyi, Krisztian Pak, Csaba Papp, Sandor Keki, Magdolna Emma Szilasi, Angela Mikaczo, Andrea Fodor, Maria Szilasi, Judit Zsuga
The major feature of COPD is a progressive airflow limitation caused by chronic airway inflammation and consequent airway remodeling. Modified arginase and nitric oxide synthase (NOS) pathways are presumed to contribute to the inflammation and fibrosis. Asymmetric dimethylarginine (ADMA) may shunt L-arginine from the NOS pathway to the arginase one by uncoupling and competitive inhibition of NOS and by enhancing arginase activity. To attest the interplay of these pathways, the relationship between ADMA and airflow limitation, described by airway resistance (Raw), was investigated in a cohort of COPD patients...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28347345/serotonergic-system-in-hypoxic-ventilatory-response-in-unilateral-rat-model-of-parkinson-s-disease
#12
Kryspin Andrzejewski, Katarzyna Kaczyńska, Małgorzata Zaremba
BACKGROUND: Malfunctioning of the serotonergic system in Parkinson's disease may contribute to non-motor symptoms such as respiratory complications. Thus the aim of our study was to investigate the role of serotonin 5-HT2 receptors in the modulation of normoxic breathing and the hypoxic ventilatory response (HVR) in rat model of Parkinson's disease. METHODS: Wistar rats were lesioned unilaterally with double 6-hydroxydopamine (6-OHDA) injection to the right medial forebrain bundle (MFB)...
March 27, 2017: Journal of Biomedical Science
https://www.readbyqxmd.com/read/28347278/validity-of-anthropometric-equations-to-estimate-infant-fat-mass-at-birth-and-in-early-infancy
#13
Jennifer S Cauble, Mira Dewi, Holly R Hull
BACKGROUND: In newborns and children, body fat estimation equations are often used at different ages than the age used to develop the equations. Limited validation studies exist for newborn body fat estimation equations at birth or later in infancy. The study purpose was to validate 4 newborn fat mass (FM) estimation equations in comparison to FM measured by air displacement plethysmography (ADP; the Pea Pod) at birth and 3 months. METHODS: Ninety-five newborns (1-3 days) had their body composition measured by ADP and anthropometrics assessed by skinfolds...
March 27, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28346234/outstanding-animal-studies-in-allergy-i-from-asthma-to-food-allergy-and-anaphylaxis
#14
Erika Jensen-Jarolim, Isabella Pali-Schöll, Franziska Roth-Walter
PURPOSE OF REVIEW: Animal models published within the past 18 months on asthma, food allergy and anaphylaxis, all conditions of rising public health concern, were reviewed. RECENT FINDINGS: While domestic animals spontaneously develop asthma, food allergy and anaphylaxis, in animal models, divergent sensitization and challenge routes, dosages, intervals and antigens are used to induce asthmatic, food allergic or anaphylactic phenotypes. This must be considered in the interpretation of results...
June 2017: Current Opinion in Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28343583/indirect-hand-and-forearm-vasomotion-regional-variations-in-cutaneous-thermosensitivity-during-normothermia-and-mild-hyperthermia
#15
Catriona A Burdon, Kyoko Tagami, Joonhee Park, Joanne N Caldwell, Nigel A S Taylor
In this experiment, hand and forearm vasomotor activity was investigated during localised, but stable heating and cooling of the face, hand and thigh, under open-loop (clamped) conditions. It was hypothesised that facial stimulation would provoke the most potent vascular changes. Nine individuals participated in two normothermic trials (mean body temperature clamp: 36.6°C; water-perfused suit and climate chamber) and two mildly hyperthermic trials (37.9°C). Localised heating (+5°C) and cooling (-5°C) stimuli were applied to equal surface areas of the face, hand and thigh (perfusion patches: 15min), while contralateral forearm or hand blood flows (venous-occlusion plethysmography) were measured (separate trials)...
April 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28332435/mild-acute-intermittent-hypoxia-improves-respiratory-function-in-unanesthetized-rats-with-midcervical-contusion
#16
Kun-Ze Lee, Shu-Chi Chiang, Yu-Jie Li
BACKGROUND: Mild intermittent hypoxia has been considered a potential approach to induce respiratory neuroplasticity. OBJECTIVE: The purpose of the present study was to investigate whether mild acute intermittent hypoxia can improve breathing function in a clinically relevant spinal cord injury animal model. METHODS: Adult male rats received laminectomy or unilateral contusion at the C3-C4 spinal cord using a MASCIS Impactor (height: 6.25 or 12...
April 2017: Neurorehabilitation and Neural Repair
https://www.readbyqxmd.com/read/28330778/intratracheal-lps-administration-attenuates-the-acute-hypoxic-ventilatory-response-role-of-brainstem-il-1%C3%AE-receptors
#17
A P Ribeiro, C A Mayer, C G Wilson, R J Martin, P M MacFarlane
Perinatal inflammation and infection are commonly associated with various respiratory morbidities in preterm infants including apnea of prematurity. In this study, we investigated whether pulmonary inflammation via intra-tracheal micro-injection of lipopolysaccharide (LPS) into neonatal rats modifies respiratory neural control via an IL-1β receptor-dependent mechanism. Prior to an intra-tracheal micro-injection of LPS (1mg/kg), 10day old (Postnatal age, P10) rats received an intraperitoneal (i.p.) or intracisternal (i...
March 19, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28330427/comparison-of-airway-response-in-na%C3%A3-ve-and-ovalbumin-sensitized-mice-during-short-term-inhalation-exposure-to-chlorine
#18
Mia Johansson, Åsa Gustafsson, Gunnar Johanson, Mattias Öberg
OBJECTIVE: It has been suggested that asthmatics are more susceptible than healthy individuals to airborne irritating chemicals in general. However, there is limited human data available to support this hypothesis due to ethical and practical difficulties. We explored a murine model of ovalbumin (OVA)-induced airway inflammation to study susceptibility during acute exposure to chemicals with chlorine as a model substance. METHODS: Naïve and OVA sensitized female BALB/c mice were exposed to chlorine at four different concentrations (0, 5, 30 and 80 ppm) for 15 minutes with online recording of the respiratory function by plethysmography...
February 2017: Inhalation Toxicology
https://www.readbyqxmd.com/read/28324618/thermogelling-chitosan-lactate-hydrogel-improves-functional-recovery-after-a-c2-spinal-cord-hemisection-in-rat
#19
Katarzyna Nawrotek, Tanguy Marqueste, Zofia Modrzejewska, Roman Zarzycki, Agnieszka Rusak, Patrick Decherchi
The present study was designed to provide an appropriate micro-environment for regenerating axotomized neurons and proliferating/migrating cells. Because of its intrinsic permissive properties, biocompatibility and biodegradability, we chose to evaluate the therapeutic effectiveness of a chitosan-based biopolymer. The biomaterial toxicity was measured through in vitro test based on fibroblast cell survival on thermogelling chitosan lactate hydrogel substrate and then polymer was implanted into a C2 hemisection of the rat spinal cord...
March 21, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28323205/modelling-mixing-within-the-dead-space-of-the-lung-improves-predictions-of-functional-residual-capacity
#20
Chris D Harrison, Phi Anh Phan, Cathy Zhang, Daniel Geer, Andrew D Farmery, Stephen J Payne
Routine estimation of functional residual capacity (FRC) in ventilated patients has been a long held goal, with many methods previously proposed, but none have been used in routine clinical practice. This paper proposes three models for determining FRC using the nitrous oxide concentration from the entire expired breath in order to improve the precision of the estimate. Of the three models proposed, a dead space with two mixing compartments provided the best results, reducing the mean limits of agreement with the FRC measured by whole body plethysmography by up to 41%...
March 18, 2017: Respiratory Physiology & Neurobiology
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