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https://www.readbyqxmd.com/read/28226551/beat-to-beat-heart-rate-detection-by-smartphone-s-accelerometers-validation-with-ecg
#1
F Landreani, A Martin-Yebra, C Casellato, C Frigo, E Pavan, P-F Migeotte, E G Caiani, F Landreani, A Martin-Yebra, C Casellato, C Frigo, E Pavan, P-F Migeotte, E G Caiani, A Martin-Yebra, P-F Migeotte, Eg Caiani, F Landreani, C Casellato, C Frigo, E Pavan
: Mobile phones offer the possibility to monitor and track health parameters. Our aim was to test the feasibility and accuracy of measuring beat-to-beat heart rate using smartphone accelerometers by recording the vibrations generated by the heart during its function and transmitted to the chest wall, i.e. the so-called seismocardiographic signal (SCG). METHODS: 9 healthy male volunteers were studied in supine (SUP) and in standing (ST) posture. A smartphone (iPhone6, Apple) was positioned on the thorax (POS1) to acquire SCG signal...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28218012/reference-values-for-pulmonary-diffusing-capacity-for-adult-native-finns
#2
Annette Kainu, Jyri Toikka, Esko Vanninen, Kirsi L Timonen
Measurement standards for pulmonary diffusing capacity were updated in 2005 by the ATS/ERS Task Force. However, in Finland reference values published in 1982 by Viljanen et al. have been used to date. The main aim of this study was to produce updated reference models for single-breath diffusing capacity for carbon monoxide for Finnish adults. Single-breath diffusing capacity for carbon monoxide was measured in 631 healthy non-smoking volunteers (41.5% male). Reference values for diffusing capacity (DLCO), alveolar volume (VA), diffusing capacity per unit of lung volume (DLCO/VA), and lung volumes were calculated using a linear regression model...
April 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/28211313/detection-and-elimination-of-corynebacterium-bovis-from-barrier-rooms-by-using-an-environmental-sampling-surveillance-program
#3
Christopher A Manuel Umarani Pugazhenthi Shannon P Spiegel And Jori K Leszczynski
Rodent health-monitoring programs based on sampling an IVC system's exhaust air dust (EAD) has enhanced and evenreplaced traditional sentinels for some rodent pathogens. EAD testing by qPCR assay is an optimal surveillance methodfor the rapid detection of Corynebacterium bovis-infected immunodeficient mice. Here we demonstrate that an active EADsurveillance program for C. bovis can be used to maintain nude mice C. bovis-free after the transition from historically enzootically infected colonies. During 3 events over 3 y, rapid detection of infection, elimination of infected mice, aggressivequarantine measures, and local decontamination prevented the spread of C...
February 16, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28149825/correlations-between-pulmonary-artery-pressures-and-inferior-vena-cava-collapsibility-in-critically-ill-surgical-patients-an-exploratory-study
#4
Stanislaw P Stawicki, Thomas J Papadimos, David P Bahner, David C Evans, Christian Jones
INTRODUCTION: As pulmonary artery catheter (PAC) use declines, search continues for reliable and readily accessible minimally invasive hemodynamic monitoring alternatives. Although the correlation between inferior vena cava collapsibility index (IVC-CI) and central venous pressures (CVP) has been described previously, little information exists regarding the relationship between IVC-CI and pulmonary artery pressures (PAPs). The goal of this study is to bridge this important knowledge gap...
October 2016: International Journal of Critical Illness and Injury Science
https://www.readbyqxmd.com/read/28149028/comparative-evaluation-of-central-venous-pressure-and-sonographic-inferior-vena-cava-variability-in-assessing-fluid-responsiveness-in-septic-shock
#5
Manjri Garg, Jyotsna Sen, Sandeep Goyal, Dhruva Chaudhry
OBJECTIVE: Fluid infusion, the most critical step in the resuscitation of patients with septic shock, needs preferably continuous invasive hemodynamic monitoring. The study was planned to evaluate the efficacy of ultrasonographically measured inferior vena cava collapsibility index (IVC CI) in comparison to central venous pressure (CVP) in predicting fluid responsiveness in septic shock. MATERIALS AND METHODS: Thirty-six patients of septic shock requiring ventilatory support (invasive/noninvasive) were included...
December 2016: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/28090072/reconsideration-of-inferior-vena-cava-parameters-for-estimating-right-atrial-pressure-in-an-east-asian-population%C3%A3-comparative-simultaneous-ultrasound-catheterization-study
#6
Takayuki Kawata, Masao Daimon, Seitetsu L Lee, Koichi Kimura, Naoko Sawada, Shuo-Ju Chiang, Keitaro Mahara, Takeshi Okubo, Tomoko Nakao, Megumi Hirokawa, Boqing Xu, Tomoko S Kato, Masafumi Watanabe, Yutaka Yatomi, Issei Komuro
BACKGROUND: Ultrasound measurements of the inferior vena cava (IVC) diameter (IVCD), together with its respiratory variation, provide a noninvasive estimate of right atrial pressure (RAP). However, there is a paucity of studies that have compared this technique with simultaneous catheterization. We explored the best cut-off values of IVC parameters for elevated RAP in comparison with RAP measured by catheterization.Methods and Results:We prospectively enrolled 120 East Asian patients who were scheduled for catheterization...
January 13, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28065586/estimation-of-central-venous-pressure-using-the-ratio-of-short-to-long-diameter-from-cross-sectional-images-of-the-inferior-vena-cava
#7
Yoshihiro Seo, Noriko Iida, Masayoshi Yamamoto, Tomoko Machino-Ohtsuka, Tomoko Ishizu, Kazutaka Aonuma
BACKGROUND: Long-axis images of the inferior vena cava (IVC) have limitations as surrogates for IVC morphology in grading central venous pressure (CVP) by two-dimensional echocardiography (2DE), because of the various cross-sectional morphologies and the translational motion of the IVC induced by sniffing. On the basis of the relationship between venous pressure and compliance, it was hypothesized that the cross-sectional morphology of the IVC, which was obtained using three-dimensional echocardiography, might estimate CVP more accurately compared with standard grading by 2DE...
January 5, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28038721/assessment-of-inferior-vena-cava-diameter-by-echocardiography-in-normal-indian-population-a-prospective-observational-study
#8
Shivanand Patil, Santosh Jadhav, Natraj Shetty, Jayashree Kharge, Beeresha Puttegowda, Rangraj Ramalingam, Manjunath Nanjappa Cholenahally
BACKGROUND: The assessment of the IVC diameter is self explanatory for evaluation of the individuals' volume status. Studies regarding IVC diameter estimation in normal individuals are scarce. AIM: The present study aimed to define normal criteria of size and dynamics of the inferior vena cava (IVC) by M-mode echocardiography in normal individuals. METHODS: This was a prospective, single-center, observational study carried out at Sri Jayadeva Institute of Cardiovascular Sciences and Research between December 2011 and April 2014...
December 2016: Indian Heart Journal
https://www.readbyqxmd.com/read/28030505/ultrasound-assessment-of-volume-responsiveness-in-critically-ill-surgical-patients-two-measurements-are-better-than-one
#9
Sarah B Murthi, Syeda Fatima, Ashely R Menne, Jacob J Glaser, Samuel M Galvagno, Stephen Biederman, Raymond Fang, Hegang Chen, Thomas M Scalea
BACKGROUND: The intended physiologic response to a fluid bolus is an increase in stroke volume (SV). Several ultrasound (US) measures have been shown to be predictive. The best measure(s) in critically ill surgical patients remains unclear. METHODS: This is a prospective observational study in critically ill surgical patients receiving a bolus of crystalloid, colloid or blood. A transthoracic echocardiogram was performed before (pre-transthoracic echocardiogram) and after...
March 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28008296/point-of-care-ultraportable-echocardiography-predicts-diuretic-response-in-patients-admitted-with-acute-decompensated-heart-failure
#10
Dena K Krishnan, Barbara Pawlaczyk, Peter A McCullough, Susan Enright, Arvind Kunadi, Thomas E Vanhecke
BACKGROUND: Routine management of patients with acute decompensated heart failure (ADHF) requires careful attentiveness to fluid status and diuretic treatment efficacy. New advances in ultrasound have made ultraportable echocardiography (UE) available to physicians for point-of-care use. The purpose of this study is to explore physiologic measures of intravascular fluid volume derived from UE and explore predictors of diuretic response in ADHF. METHODS: Various echocardiography imaging measurements, particularly diameter and collapse of inferior vena cava (IVC), were collected from 77 patients admitted with a primary diagnosis of ADHF...
2016: Clinical Medicine Insights. Cardiology
https://www.readbyqxmd.com/read/27925364/discriminatory-ability-of-right-atrial-volumes-with-two-and-three-dimensional-echocardiography-to-detect-elevated-right-atrial-pressure-in-pulmonary-hypertension
#11
Ellen Ostenfeld, Anna Werther-Evaldsson, Henrik Engblom, Annika Ingvarsson, Anders Roijer, Carl Meurling, Johan Holm, Göran Rådegran, Marcus Carlsson
AIMS: Pulmonary hypertension (PH) patients have high mortality due to right ventricular failure. Predictors of poor prognostic outcome are increased right atrial volume (RAV) and elevated mean right atrial pressure (mRAP). Our aim was to determine whether RAV measured with 2D echocardiography (2DE) and 3D echocardiography (3DE) can detect elevated mRAP in patients evaluated for PH. METHODS: Of 85 patients prospectively evaluated for PH, 44 patients (63 ± 15 years, 57% female) had 2DE, 3DE and right heart catheterization within 48 h and were in sinus rhythm...
December 7, 2016: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/27878445/can-non-invasive-ventilation-modify-central-venous-pressure-comparison-between-invasive-measurement-and-ultrasonographic-evaluation
#12
Maurizio Zanobetti, Alessio Prota, Alessandro Coppa, Laura Giordano, Sofia Bigiarini, Peiman Nazerian, Francesca Innocenti, Alberto Conti, Federica Trausi, Simone Vanni, Giuseppe Pepe, Riccardo Pini
Central venous pressure (CVP) is primarily measured to assess intravascular volume status and heart preload. In clinical practice, the measuring device most commonly used in emergency departments and intensive care units, is an electronic transducer that interconnects a central venous catheter (CVC) with a monitoring system. Non-invasive ventilation (NIV) consists in a breathing support that supplies a positive pressure in airways through a mask or a cask though not using an endotracheal prosthesis. In emergency settings, non-invasive ultrasonography evaluation of CVP, and hence of intravascular volume status entail the measurement by a subxiphoid approach of inferior vena cava diameter and its variations in relation to respiratory activity...
November 22, 2016: Internal and Emergency Medicine
https://www.readbyqxmd.com/read/27871094/biomechanical-responses-of-pmhs-subjected-to-abdominal-seatbelt-loading
#13
Rakshit Ramachandra, Yun-Seok Kang, John H Bolte, Alena Hagedorn, Rodney Herriott, Jason A Stammen, Kevin Moorhouse
Past studies have found that a pressure based injury risk function was the best predictor of liver injuries due to blunt impacts. In an effort to expand upon these findings, this study investigated the biomechanical responses of the abdomen of post mortem human surrogates (PMHS) to high-speed seatbelt loading and developed external response targets in conjunction with proposing an abdominal injury criterion. A total of seven unembalmed PMHS, with an average mass and stature of 71 kg and 174 cm respectively were subjected to belt loading using a seatbelt pull mechanism, with the PMHS seated upright in a freeback configuration...
November 2016: Stapp Car Crash Journal
https://www.readbyqxmd.com/read/27857946/can-bedside-ultrasound-inferior-vena-cava-measurements-accurately-diagnose-congestive-heart-failure-in-the-emergency-department-a-clin-iq
#14
Miranda Gaskamp, Mark Blubaugh, Laine H McCarthy, Dewey C Scheid
Congestive heart failure (CHF) is a major cause of morbidity and mortality. Early diagnosis of CHF in patients presenting to the emergency department (ED) with undifferentiated dyspnea would allow clinicians to begin appropriate treatment more promptly. Current guidelines recommend B-type natriuretic peptide (BNP) levels for more accurate diagnosis of CHF in dyspneic patients. Although BNP levels are relatively inexpensive, the test is not usually performed at bedside and results may take up to an hour or more...
October 2016: Journal of Patient-centered Research and Reviews
https://www.readbyqxmd.com/read/27847069/embolization-of-inferior-vena-cava-filter-tyne-and-right-ventricular-perforation-a-cardiac-missile
#15
Thomas Ollila, Syed Naeem, Athena Poppas, George McKendall, Afshin Ehsan
Inferior vena cava (IVC) filter is a medical device placed in patients with proven pulmonary embolism or those with risk of embolization. Although many IVC filters are designed for removal after patient recovery, in many instances they are never retrieved. We present a case of a 22-year-old woman who underwent placement of an IVC filter as a prophylactic measure following a C-6 spinal injury that rendered her a quadriplegic. A tyne from the filter later fractured and embolized to the right ventricle, leading to perforation and subsequent large symptomatic pericardial effusion...
December 2016: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/27797797/infrarenal-aortic-clamp-reviving-a-patient-from-acute-surgical-haemorrhagic-shock-a-novel-management-technique
#16
Ranjith Kumar, M V S Satya Prakash, Subhasree Das, Ramanitharan Manikandan
Surgical management of renal cell carcinoma extending into the inferior vena cava (IVC) is almost always accompanied by massive intraoperative blood loss and associated complications. It is a widely recognised problem, and its active management is essential in improving the perioperative morbidity and mortality. We share our experience with a similar case of open radical nephrectomy with massive blood loss of twice the circulating volume in a duration of <8 surgical hours. Although we emphasise the goals of securing haemostasis, restoration of circulating volume, and efficient management by replacing blood components, in the present case, despite the above-mentioned goals being fulfilled, we were unable to extricate the patient from haemorrhagic shock by conventional means and therefore resorted to desperate measures, namely the novel approach of infrarenal aortic clamping along with higher than recommended vasopressor support...
October 19, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27762259/inferior-vena-cava-collapsibility-index-is-a-valuable-and-non-invasive-index-for-elevated-general-heart-end-diastolic-volume-index-estimation-in-septic-shock-patients
#17
Jie Zhao, Guolin Wang
BACKGROUND This study aimed to investigate the relationship between the inferior vena cava respirophasic variation (IVC collapsibility index [IVCCI]) and the general heart end-diastolic volume index (GEDVI). By determining the above relationship, we could evaluate the utility of IVCCI as an indicator. MATERIAL AND METHODS Forty-two septic patients were finally enrolled in this study. The inferior vena cava's diameter was measured with the largest at the end of expiration (IVC3) and with the smallest at the end of inspiration (IVCi) on the ultrasound (IVCCI=[(IVCD e - IVCD i)/IVCD e] ×100%)...
October 20, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27752831/effect-of-fontan-operation-on-liver-stiffness-in-children-with-single-ventricle-physiology
#18
Frank W DiPaola, Kurt R Schumacher, Caren S Goldberg, Joshua Friedland-Little, Aishwarya Parameswaran, Jonathan R Dillman
OBJECTIVES: Assess liver stiffness using ultrasound point shear wave elastography (US P-SWE) in children before and after the Fontan operation. METHODS: Eighteen children undergoing the Fontan operation were prospectively enrolled. Eight US P-SWE measurements were obtained from the right hepatic lobe before surgery, and at multiple postoperative time points. Temporally related inferior vena cava pressure (IVC) data was collected from medical records, when available...
October 17, 2016: European Radiology
https://www.readbyqxmd.com/read/27734186/estimation-of-right-ventricular-dysfunction-by-computed-tomography-pulmonary-angiography-a-valuable-adjunct-for-evaluating-the-severity-of-acute-pulmonary-embolism
#19
Dong Jia, Xiao-Ming Zhou, Gang Hou
To evaluate the feasibility and the efficacy of computed tomography pulmonary angiography (CTPA) in differentiating acute pulmonary embolism (PE) patients with or without right ventricular dysfunction and to evaluate the severity of right ventricular dysfunction in acute PE patients with CPTA. We retrospectively collected and measured the following parameters: right ventricular diameter by short axis in the axial plane (RVDaxial), left ventricular diameter by short axis in the axial plane (LVDaxial), right ventricular diameter by level on the reconstructed four-chamber views (RVD4-CH), left ventricular diameter by level on the reconstructed four-chamber views (LVD4-CH), main pulmonary artery diameter (MPAD), ascending aorta diameter (AOD), coronary sinus diameter (CSD), superior vena cava diameter (SVCD), inferior vena cava (IVC) reflux and interventricular septum deviation by CTPA, and we calculated the RVDaxial/LVDaxial, RVD4-CH/LVD4-CH and MPAD/AOD ratios in acute PE patients...
October 12, 2016: Journal of Thrombosis and Thrombolysis
https://www.readbyqxmd.com/read/27729265/laser-assisted-removal-of-embedded-vena-cava-filters-a-5-year-first-in-human-study
#20
William T Kuo, Justin I Odegaard, Jarrett K Rosenberg, Lawrence V Hofmann
BACKGROUND: Many patients are subjected to the potential risks and morbidity associated with an indwelling inferior vena cava (IVC) filter when standard methods fail to remove the filter. We evaluated the safety and effectiveness of the excimer laser sheath technique for removing embedded IVC filters. METHODS: Over a 5-year period, 251 consecutive patients undergoing laser-assisted filter retrieval were prospectively enrolled. There were 103 men and 148 women (mean, 46 years; range, 15-82 years)...
February 2017: Chest
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