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cuff inflation measurements

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https://www.readbyqxmd.com/read/28704612/blood-flow-in-humans-following-low-load-exercise-with-and-without-blood-flow-restriction
#1
J Grant Mouser, Gilberto C Laurentino, Scott J Dankel, Samuel L Buckner, Matthew B Jessee, Brittany R Counts, Kevin T Mattocks, Jeremy P Loenneke
Blood flow restriction (BFR) in combination with exercise has been used to increase muscle size and strength using relatively low loads (20%-30% 1-repetition maximum (1RM)). In research, the range of applied pressures based on a percentage of arterial occlusion pressure (AOP), is wide. The purpose of the study is to measure the blood flow response before exercise, following each set of exercise, and postexercise to low-load elbow flexion combined with no restriction (NOBFR), 40% of AOP (40BFR), and 80% of AOP (80BFR)...
July 13, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28611883/altitude-related-change-in-endotracheal-tube-cuff-pressures-in-helicopter-ems
#2
Stacy N Weisberg, Jonathan C McCall, Joseph Tennyson
INTRODUCTION: Over-inflation of endotracheal tube (ETT) cuffs has the potential to lead to scarring and stenosis of the trachea.1, 2,3, 4 The air inside an ETT cuff is subject to expansion as atmospheric pressure decreases, as happens with an increase in altitude. Emergency medical services helicopters are not pressurized, thereby providing a good environment for studying the effects of altitude changes ETT cuff pressures. This study aims to explore the relationship between altitude and ETT cuff pressures in a helicopter air-medical transport program...
June 2017: Western Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28536897/validation-of-myocardial-perfusion-quantification-by-dynamic-ct-in-an-ex-vivo-porcine-heart-model
#3
Gert Jan Pelgrim, Marco Das, Sjoerd van Tuijl, Marly van Assen, Frits W Prinzen, Marco Stijnen, Matthijs Oudkerk, Joachim E Wildberger, Rozemarijn Vliegenthart
To test the accuracy of quantification of myocardial perfusion imaging (MPI) using computed tomography (CT) in ex-vivo porcine models. Five isolated porcine hearts were perfused according to Langendorff. Hearts were perfused using retrograde flow through the aorta and blood flow, blood pressure and heart rate were monitored throughout the experiment. An inflatable cuff was placed around the circumflex (Cx) artery to create stenosis grades which were monitored using a pressure wire, analysing perfusion at several fractional flow reserve values of 1...
May 23, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28502060/comparison-of-univent-tube-and-ez-blocker-in-one-lung-ventilation-airway-pressures-and-gas-exchange
#4
Tülay Hoşten, Can Aksu, Alparslan Kuş, Sevim Cesur, Neşe Türkyılmaz, Mine Solak
Univent tube (UT) and EZ-blocker were used for one-lung ventilation (OLV). UT is a single lumen tube with a small separate lumen containing a bronchial blocker. EZ-blocker differs with its unique y-shaped double-cuffed distal end. We aimed to compare these two airway devices effects on airway pressures, oxygenation, ventilation and haemodynamics during OLV. Patients undergoing elective thoracotomy for the first time were included in this prospective randomized study. Patients were divided into two groups as UT and EZ...
May 13, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28459408/-influence-of-intermittently-monitoring-on-endotracheal-tube-cuff-pressure-using-handheld-pressure-gauge
#5
Ling Huang, Chen Xie, Lifeng Zhang, Liying Meng, Guizheng Li, Yang Li, Bing Huang, Linghui Pan, Zhanhong Tang
OBJECTIVE: To discuss the influence of intermittently monitoring on endotracheal tube cuff pressure using handheld pressure gauge, and to provide some reference for the clinical work. METHODS: The experiment was carried out on the model of the glass tube, which was divided into three parts. Each part of the experiment was divided into normal pressure group and high pressure group according to the different inflation pressure target value. The endotracheal tube cuff pressure was determined intermittently by using the transparent tracheal models which had a static diameter of 2 cm...
January 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28410880/the-effect-of-user-experience-and-inflation-technique-on-endotracheal-tube-cuff-pressure-using-a-feline-airway-simulator
#6
Donna M White, José I Redondo, Alastair R Mair, Fernando Martinez-Taboada
OBJECTIVE: The effect of user experience and inflation technique on endotracheal tube cuff pressure using a feline airway simulator. STUDY DESIGN: Prospective, experimental clinical study. METHODS: Participants included veterinary students at the beginning (group S1) and end (group S2) of their 2-week anaesthesia rotation and veterinary anaesthetists (group A). The feline airway simulator was designed to simulate an average size feline trachea, intubated with a 4...
February 24, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28397384/characteristics-and-effectiveness-of-vasodilatory-and-pressor-compensation-for-reduced-relaxation-time-during-rhythmic-forearm-contractions
#7
Robert F Bentley, Veronica J Poitras, Terrence Hong, Michael E Tschakovsky
During muscle contraction in rhythmic exercise muscle blood flow is significantly impeded by microvascular compression. The purpose of this study was to establish the nature and magnitude of vasodilatory and/or pressor compensatory responses during forearm exercise in the face of an increased duration of mechanical microvascular compression, and whether the effectiveness of such compensation was exercise intensity dependent. Seven healthy males (21.0 ± 1.8 yrs) completed progressive forearm exercise (24...
April 10, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28329231/cardiac-protective-effects-of-remote-ischaemic-preconditioning-in-children-undergoing-tetralogy-of-fallot-repair-surgery-a-randomized-controlled-trial
#8
Qingping Wu, Tingting Wang, Shiqiang Chen, Quanjun Zhou, Haobo Li, Na Hu, Yinglu Feng, Nianguo Dong, Shanglong Yao, Zhengyuan Xia
Aims: Remote ischaemic preconditioning (RIPC) by inducing brief ischaemia in distant tissues protects the heart against myocardial ischaemia-reperfusion injury (IRI) in children undergoing open-heart surgery, although its effectiveness in adults with comorbidities is controversial. The effectiveness and mechanism of RIPC with respect to myocardial IRI in children with tetralogy of Fallot (ToF), a severe cyanotic congenital cardiac disease, undergoing open heart surgery are unclear. We hypothesized that RIPC can confer cardioprotection in children undergoing ToF repair surgery...
February 18, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28324936/a-preliminary-study-on-multi-wavelength-ppg-based-pulse-transit-time-detection-for-cuffless-blood-pressure-measurement
#9
Jing Liu, Yuan-Ting Zhang, Xiao-Rong Ding, Wen-Xuan Dai, Ni Zhao
Pulse transit time (PTT) has been widely studied as an index of blood pressure (BP) changes. In recent years, some prototypes of PTT-based wearable BP measurement devices have been developed, which can relieve users from the discomfort caused by the inflating cuff used in auscultatory and oscillometric BP measurement techniques. However, in the common practice for PTT detection, multi-site sensor implementation on human body is required, making it difficult for the integration of wearable devices. Since multi-wavelength (MW) photoplethysmogram (PPG) signals carry blood pulsation information of different blood vessels embedded in different skin depths, the time difference between different wavelength PPG signals collected at the same body site can be treated as a special PTT on a short length of blood vessels beneath the skin...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28320895/peripheral-venous-congestion-causes-time-and-dose-dependent-release-of-endothelin-1-in-humans
#10
Jeffrey Lin, Neelesh Chudasama, Yacki Hayashi, Christopher Hawk, Sahadeo D Ramnauth, Ka Yuk Wong, Ante Harxhi, Duygu Onat, Michiyori Wakabayashi, Nir Uriel, Ulrich P Jorde, Thierry H LeJemtel, Hani N Sabbah, Ryan T Demmer, Paolo C Colombo
Endothelin-1 (ET-1) is a pivotal mediator of vasoconstriction and inflammation in congestive states such as heart failure (HF) and chronic kidney disease (CKD). Whether peripheral venous congestion (VC) increases plasma ET-1 at pressures commonly seen in HF and CKD patients is unknown. We seek to characterize whether peripheral VC promotes time- and dose-dependent increases in plasma ET-1 and whether these changes are sustained after decongestion. We used a randomized, cross-over design in 20 healthy subjects (age 30 ± 7 years)...
March 2017: Physiological Reports
https://www.readbyqxmd.com/read/28298779/accuracy-in-blood-pressure-monitoring-the-effect-of-noninvasive-blood-pressure-cuff-inflation-on-intra-arterial-blood-pressure-values
#11
Veena Sheshadri, Akhilesh Kumar Tiwari, Mahesh Nagappa, Lashmi Venkatraghavan
CONTEXT: Both invasive and noninvasive blood pressure (invasive arterial blood pressure [IABP] and noninvasive BP [NIBP]) monitors are used perioperatively; however, they often produce different values. The reason for this discrepancy is not clear, and it is possible that the act of cuff inflation itself might affect the IABP values, especially with the recurrent cycling of NIBP cuff. AIM: The aim of this study was to determine the effect of ipsilateral NIBP cuff inflation on the contralateral IABP values...
January 2017: Anesthesia, Essays and Researches
https://www.readbyqxmd.com/read/28298332/impact-of-lifelong-exercise-training-on-endothelial-ischemia-reperfusion-and-ischemic-preconditioning-in-humans
#12
Martijn F H Maessen, Anke C C M van Mil, Yaïra Straathof, Niels P Riksen, Gerard A P J M Rongen, Maria T E Hopman, Thijs M H Eijsvogels, Dick H J Thijssen
Reperfusion is essential for ischemic tissue survival, but causes additional damage to the endothelium [i.e., ischemia-reperfusion (I/R) injury]. Ischemic preconditioning (IPC) refers to short repetitive episodes of ischemia that can protect against I/R. However, IPC efficacy attenuates with older age. Whether physical inactivity contributes to the attenuated efficacy of IPC to protect against I/R injury in older humans is unclear. We tested the hypotheses that lifelong exercise training relates to 1) attenuated endothelial I/R and 2) maintained IPC efficacy that protects veteran athletes against endothelial I/R...
May 1, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28287078/the-design-of-and-chronic-tissue-response-to-a-composite-nerve-electrode-with-patterned-stiffness
#13
M J Freeberg, M A Stone, R J Triolo, D J Tyler
OBJECTIVE: As neural interfaces demonstrate success in chronic applications, a novel class of reshaping electrodes with patterned regions of stiffness will enable application to a widening range of anatomical locations. Patterning stiff regions and flexible regions of the electrode enables nerve reshaping while accommodating anatomical constraints of various implant locations ranging from peripheral nerves to spinal and autonomic plexi. APPROACH: Introduced is a new composite electrode enabling patterning of regions of various electrode mechanical properties...
June 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28269031/towards-development-of-a-mobile-rf-doppler-sensor-for-continuous-heart-rate-variability-and-blood-pressure-monitoring
#14
Insoo Kim, Yusuf A Bhagat
The standard in noninvasive blood pressure (BP) measurement is an inflatable cuff device based on the oscillometric method, which poses several practical challenges for continuous BP monitoring. Here, we present a novel ultra-wide band RF Doppler radar sensor for next-generation mobile interface for the purpose of characterizing fluid flow speeds, and for ultimately measuring cuffless blood flow in the human wrist. The system takes advantage of the 7.1~10.5 GHz ultra-wide band signals which can reduce transceiver complexity and power consumption overhead...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28267445/abdominal-compression-by-waist-belt-aggravates-gastroesophageal-reflux-primarily-by-impairing-esophageal%C3%A2-clearance
#15
David R Mitchell, Mohammad H Derakhshan, Angela A Wirz, Stuart A Ballantyne, Kenneth E L McColl
BACKGROUND & AIMS: Central obesity promotes gastroesophageal reflux, which may be related to increased intra-abdominal pressure. We investigated the effect of increasing abdominal pressure by waist belt on reflux in patients with reflux disease. METHODS: We performed a prospective study of patients with esophagitis (n = 8) or Barrett's esophagus (n = 6); median age was 56 years and median body mass index was 26.8. Proton pump inhibitors were stopped at least 7 days before the study and H2 receptor antagonists were stopped for at least 24 hours before...
June 2017: Gastroenterology
https://www.readbyqxmd.com/read/28261920/remote-physiological-ischemic-training-promotes-coronary-angiogenesis-via-molecular-and-cellular-mobilization-after-myocardial-ischemia
#16
Yu Zheng, Mingyue Xiao, Ling Li, Jianan Li, Jan D Reinhardt, Xiao Lu
AIM: This study was designed to explore the mechanism of physiological ischemic training (PIT) on remote limbs, with a special focus on the potential role of endothelial progenitor cells (EPCs), vascular endothelial growth factor (VEGF) and nitric oxide (NO) in local ischemic myocardium. METHOD: MI rabbit models were randomly assigned to sham-operated group (SO), training only group (TO), myocardial ischemia group (MI), PIT group, VEGF inhibitor group (VEGF-), NO inhibitor group (NO-), VEGF and NO inhibitor group (VEGF-/NO-), and EPC inhibitor group (EPC-)...
March 6, 2017: Cardiovascular Therapeutics
https://www.readbyqxmd.com/read/28258686/ischaemic-preconditioning-for-the-reduction-of-renal-ischaemia-reperfusion-injury
#17
REVIEW
Theo P Menting, Kimberley E Wever, Denise Md Ozdemir-van Brunschot, Daan Ja Van der Vliet, Maroeska M Rovers, Michiel C Warle
BACKGROUND: Ischaemia reperfusion injury can lead to kidney dysfunction or failure. Ischaemic preconditioning is a short period of deprivation of blood supply to particular organs or tissue, followed by a period of reperfusion. It has the potential to protect kidneys from ischaemia reperfusion injury. OBJECTIVES: This review aimed to look at the benefits and harms of local and remote ischaemic preconditioning to reduce ischaemia and reperfusion injury among people with renal ischaemia reperfusion injury...
March 4, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28257624/endotracheal-tubes-and-fluid-aspiration-an-in-vitro-evaluation-of-new-cuff-technologies
#18
Maryanne Z Mariyaselvam, Lucy L Marsh, Sarah Bamford, Ann Smith, Matt P Wise, David W Williams
BACKGROUND: Aspiration of subglottic secretions past the endotracheal tube (ETT) cuff is a prerequisite for developing ventilator-associated pneumonia (VAP). Subglottic secretion drainage (SSD) ETTs reduce aspiration of subglottic secretions and have demonstrated lower VAP rates. We compared the performance of seven SSD ETTs against a non-SSD ETT in preventing aspiration below inflated cuffs. METHODS: ETTs were positioned vertically in 2 cm diameter cylinders. Four ml of a standard microbial suspension was added above inflated cuffs...
March 4, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28256419/evaluation-of-the-acceptability-of-a-sphygmomanometer-device-in-knee-extension-training-following-surgical-procedures-of-the-knee
#19
Hauke Horstmann, Christian Colcuc, Philipp Lobenhoffer, Christian Krettek, Thomas Sanjay Weber-Spickschen
BACKGROUND: The postoperative treatment after a standard surgical intervention such as knee arthroplasty, proximal tibial osteotomy or supracondylar osteotomy, can have an important impact on the overall treatment outcome. In most cases, outcomes are positively effected by patients receiving physiotherapy and occupational therapy. Basic movements and range of motion need to be learnt. Self-responsible behaviour, which is similar to exercise programs in sports, needs to be supported. However, in most cases the transfer of training techniques into successful and desired postoperative care is not simple...
May 2017: International Journal of Orthopaedic and Trauma Nursing
https://www.readbyqxmd.com/read/28227244/towards-development-of-a-mobile-rf-doppler-sensor-for-continuous-heart-rate-variability-and-blood-pressure-monitoring
#20
Insoo Kim, Yusuf A Bhagat, Insoo Kim, Yusuf A Bhagat, Insoo Kim, Yusuf A Bhagat
The standard in noninvasive blood pressure (BP) measurement is an inflatable cuff device based on the oscillometric method, which poses several practical challenges for continuous BP monitoring. Here, we present a novel ultra-wide band RF Doppler radar sensor for next-generation mobile interface for the purpose of characterizing fluid flow speeds, and for ultimately measuring cuffless blood flow in the human wrist. The system takes advantage of the 7.1~10.5 GHz ultra-wide band signals which can reduce transceiver complexity and power consumption overhead...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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