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cuff inflation measurements

N Pratheeba, G S Ramya, R V Ranjan, R Remadevi
CONTEXT: Laryngeal mask airway (LMA) Classic™ has an inflatable cuff while i-gel™ has a noninflatable cuff made of thermoplastic elastomer. AIMS: To compare ease of insertion, number, and duration of insertion attempts among the two device. Secondary objectives were to evaluate the hemodynamic response and SpO2 during device insertion and during maintenance of general anesthesia. SETTINGS AND DESIGN: This study was conducted as randomized observational study in a teaching hospital...
September 2016: Anesthesia, Essays and Researches
Darío Villalba, Viviana Feld, Valeria Leiva, Mariana Scrigna, Eduardo Distéfano, Romina Pratto, Matías Rodriguez, Jesica Collins, Ana Rocco, Amelia Matesa, Damián Rossi, Laura Areas, Sacha Virgilio, Nicolás Golfarini, Gregorio Gil-Rosetti, Pablo Diaz-Ballve, Fernando Planells
OBJECTIVE: To describe and compare the work of breathing (WOB) during spontaneous breathing under four conditions: (1) breathing through a tracheostomy tube with an inflated cuff, (2) breathing through the upper airway (UA) with a deflated cuff and occluded tube, (3) breathing through the UA with an occluded cuffless tube, and (4) postdecannulation. PATIENTS AND METHODS: Patients who tolerated an occluded cuffless tube were included. Ventilatory variables and esophageal pressure were recorded...
July 2016: International Journal of Critical Illness and Injury Science
Felipe D Lisbôa, Tiago Turnes, Rogério S O Cruz, João A G Raimundo, Gustavo S Pereira, Fabrizio Caputo
OBJECTIVES: The present study aimed to determine the effects of ischemic preconditioning on performance in three successive 50-m swimming trials and to measure stroke rate, stroke length and blood lactate accumulation. DESIGN: Counterbalanced, repeated-measures cross-over study. METHODS: On two separate days, eleven competitive male swimmers (20±3 years, 182±5cm, 77±5kg) performed three successive 50-m trials in a 50-m swimming pool, preceded by intermittent bilateral cuff inflation (4× 5-min of blood flow restriction+5-min of cuff deflation) at either 220 for thighs and 180mmHg for arms (ischemic preconditioning) or 20mmHg for both limbs (control-treatment)...
September 20, 2016: Journal of Science and Medicine in Sport
Vienna E Brunt, Andrew T Jeckell, Brett R Ely, Matthew J Howard, Dick H J Thijssen, Christopher Todd Minson
: Ischemia-reperfusion (I/R) injury is a primary cause of poor outcomes following ischemic cardiovascular events. We tested whether acute hot water immersion protects against forearm vascular I/R. METHODS: Ten (5 male, 5 female) young (23±2 years), healthy subjects participated in two trials in random order 7-21 days apart, involving: 1) 60-min of seated rest (control), or 2) 60-min of immersion in 40.5°C water (peak rectal temperature: 38.9±0.2°C). I/R was achieved 70 min following each intervention by inflating an upper arm cuff to 250mmHg for 20-min followed by 20-min of reperfusion...
October 5, 2016: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
Telmo Pereira, Armindo Almeida, João Maldonado, Jorge Conde
OBJECTIVE: The Moens-Korteweg equation predicts changes in pulse wave velocity (PWV) following changes in arterial radius, therefore an increase in arterial radius, as seen in a reactive hyperaemia (RH) condition, should slow PWV over a given arterial segment. If this assumption is true, than the deceleration of PWV over the brachial artery (flow-mediated slowing - FMS) should be an equivalent signal of endothelial function during a conventional RH flow-mediated dilation (FMD) procedure...
September 2016: Journal of Hypertension
Seung Woo Park
Rapid progress of mobile information technologies such as wearable sensors, wireless communication, and world-wide use of smartphone cause digital health innovations. In the field of hypertension, wearable blood pressure (BP) monitoring and its wireless transfer to anywhere through smartphone, mobile smartphone apps, and cuffless blood pressure monitoring system are expected to change the way of diagnosis and management of hypertension. Home BP monitoring would be easier and wireless data transfer to health care providers would be common...
September 2016: Journal of Hypertension
David John Webb
Treatment-resistant hypertension (TRH) is defined as the failure to achieve an office BP target of <140/90 mmHg (<130/80 mmHg in patients with chronic kidney disease (CKD) or diabetes) in patients with hypertension (HT), despite adherence to at least 3 antihypertensive medications at optimal tolerated doses, ideally including a diuretic (Calhoun et al., Circulation 2008). TRH identifies patients with hard-to-treat HT, who might benefit from specialist investigation and treatment. Although some studies put the prevalence of TRH as >10%, these levels may be inflated by white-coat hypertension and poor adherence...
September 2016: Journal of Hypertension
D A Harvie, J N Darvall, M Dodd, A De La Cruz, M Tacey, R L D'Costa, D Ward
Endotracheal tube (ETT) cuff pressure management is an essential part of airway management in intubated and mechanically ventilated patients. Both under- and over-inflation of the ETT cuff can lead to patient complications, with an ideal pressure range of 20-30 cmH2O defined. A range of techniques are employed to ensure adequate ETT cuff inflation, with little comparative data. We performed an observational cross-sectional study in a tertiary metropolitan ICU, assessing the relationship between the minimal leak test and cuff manometry...
September 2016: Anaesthesia and Intensive Care
C A Hockey, A A J van Zundert, J D Paratz
Correct inflation pressures of the tracheal cuff are recommended to ensure adequate ventilation and prevent aspiration and adverse events. However there are conflicting views on which measurement to employ. The aim of this review was to examine whether adjustment of cuff pressure guided by objective measurement, compared with subjective measurement or observation of the pressure value alone, was able to prevent patient-related adverse effects and maintain accurate cuff pressures. A search of PubMed, Web of Science, Embase, CINAHL and ScienceDirect was conducted using keywords 'cuff pressure' and 'measure*' and related synonyms...
September 2016: Anaesthesia and Intensive Care
Amir C Dayan, Richard H Epstein
BACKGROUND: An intact pilot balloon assembly is crucial to the proper function of a cuffed tracheal tube. Disruption of the pilot balloon, transection of the inflation line, or valve incompetence results in cuff deflation, which may lead to inadequate ventilation and aspiration of secretions. Such failures typically result in tracheal tube replacement, but this may be a safety risk if a difficult reintubation is anticipated. We recently encountered such a patient who remained intubated postoperatively and in whom the inflation line was transected, causing a large leak...
September 7, 2016: Anesthesia and Analgesia
Frank Rasulo, Nicola Zugni, Simone Piva, Nazzareno Fagoni, Federico Pe, Arturo Toninelli, Stefano Calza, Nicola Latronico
BACKGROUND: Supraglottic airway devices (SGDs) are of current use in anesthesia practice and in emergency conditions. It has been suggested that cerebral blood flow (CBF) can decrease after SGD insertion or cuff inflation; however, it is uncertain if this reduction is caused by the SGD or the anesthetic drugs utilized for the anesthetic procedure. During minor surgery we separated CBF measurements by an adequate time interval in order to measure the distinctive changes in cerebral hemodynamics associated with anesthesia induction, SGD insertion and cuff inflation...
August 2016: Minerva Anestesiologica
Ruijuan Han, Xiaoqing Liu, XianDong Yin, Meili Zheng, Kai Sun, Xingpeng Liu, Ying Tian, Xinchun Yang
BACKGROUND: Remote ischemic preconditioning (RIPC) has been suggested to reduce postoperative release of cardiac and inflammatory markers in patients undergoing cardiac surgery. This study aimed to evaluate the effect of RIPC on nonischemic myocardial damage and inflammatory response in patients undergoing radiofrequency catheter ablation for paroxysmal atrial fibrillation (AF). METHODS: Seventy-two patients with drug-refractory paroxysmal AF undergoing radiofrequency catheter ablation were randomized into RIPC or control groups...
November 1, 2016: International Journal of Cardiology
Yali Zheng, Carmen C Y Poon, Bryan P Yan, James Y W Lau
Ambulatory blood pressure monitoring (ABPM) has become an essential tool in the diagnosis and management of hypertension. Current standard ABPM devices use an oscillometric cuff-based method which can cause physical discomfort to the patients with repeated inflations and deflations, especially during nighttime leading to sleep disturbance. The ability to measure ambulatory BP accurately and comfortably without a cuff would be attractive. This study validated the accuracy of a cuff-less approach for ABPM using pulse arrival time (PAT) measurements on both healthy and hypertensive subjects for potential use in hypertensive management, which is the first of its kind...
September 2016: Journal of Medical Systems
Emilee J Luckring, Kathleen Ham, Christopher A Adin, Mary A McLoughlin, Jason W Stull
OBJECTIVE: To describe a laparoscopic approach for placement of a percutaneously controlled artificial urethral sphincter (AUS) in female cadaver dogs and compare the change in urethral pressure and lumen diameter after filling the device. STUDY DESIGN: Experimental study. ANIMALS: Canine female cadavers (n = 10). METHODS: A laparoscopic technique was used to implant the AUS in 10 cadaver dogs. Maximum urethral closure pressure (MUCP), cystourethral leak point pressure (CLPP), and urethral luminal area were measured at 0, 25, 50, and 75% cuff inflation...
June 28, 2016: Veterinary Surgery: VS
M Carassiti, A Mattei, C M Pizzo, N Vallone, P Saccomandi, E Schena
BACKGROUND: Pressures (Pe) exerted by bronchial blockers on the inner wall of the bronchi may cause mucosal ischaemia. Our aims were as follows: (i) to compare the intracuff pressure (Pi) and Pe exerted by commercially available bronchial blockers in an in vitro and an ex vivo model; (ii) to investigate the influence of both the inflated intracuff volume and cuff diameter on Pe; and (iii) to estimate the minimal sealing volume (VSmin) and the corresponding Pe for each bronchial blocker studied...
September 2016: British Journal of Anaesthesia
Mineto Kamata, Mumin Hakim, Joseph D Tobias
BACKGROUND: In recent years, there has been a shift in airway management with the use of cuffed endotracheal tubes (ETT) in pediatric patients. While the use of a syringe to deflate the cuff is generally recommended, anecdotal observations suggest that some healthcare practitioners tear off the pilot balloon from ETT to deflate the cuff. This study was conducted to estimate the residual volume in the cuff when the pilot balloon is torn off for deflation. METHOD: The in vitro study was conducted in three phases...
July 2016: International Journal of Pediatric Otorhinolaryngology
Mahmood Rafiq, Tariq M Wani, Melissa Moore-Clingenpeel, Joseph D Tobias
BACKGROUND: Choosing an appropriately sized endotracheal tube (ETT) is important in pediatric patients as an inappropriately sized ETT may result in multiple endotracheal intubation attempts or excessive pressure on the tracheal mucosa with the potential for airway damage. Although age-based formulas are generally used with choice of an ETT based on the internal diameter (ID), measurements of the outer diameter (OD) of the ETT would seem to be a more scientific approach to determine the proper size of an ETT...
June 2016: International Journal of Pediatric Otorhinolaryngology
Julie E A Hunt, Clare Stodart, Richard A Ferguson
PURPOSE: Previous investigations to establish factors influencing the blood flow restriction (BFR) stimulus have determined cuff pressures required for complete arterial occlusion, which does not reflect the partial restriction prescribed for this training technique. This study aimed to establish characteristics that should be accounted for when prescribing cuff pressures required for partial BFR. METHODS: Fifty participants were subjected to incremental blood flow restriction of the upper and lower limbs by proximal pneumatic cuff inflation...
July 2016: European Journal of Applied Physiology
Hamid Gholamhosseini, Andries Meintjes, Mirza Baig, Maria Linden
The increasing availability of low cost and easy to use personalized medical monitoring devices has opened the door for new and innovative methods of health monitoring to emerge. Cuff-less and continuous methods of measuring blood pressure are particularly attractive as blood pressure is one of the most important measurements of long term cardiovascular health. Current methods of noninvasive blood pressure measurement are based on inflation and deflation of a cuff with some effects on arteries where blood pressure is being measured...
2016: Studies in Health Technology and Informatics
René Robert, Mathieu Vinet, Angéline Jamet, Rémi Coudroy
Remote ischemic preconditioning may attenuate renal injury and protect the kidney during subsequent inflammatory or ischemic stress. However, the mechanism of such a protection is not well understood. The aim of this study was to investigate the impact of remote ischemic preconditioning on renal resistivity index (RRI) in nine healthy volunteers. In six volunteers, four cycles of 4-min inflation of a blood pressure cuff were applied to one upper arm, followed by 4-min reperfusion with the cuff deflated. RRI was determined using Doppler echography during each cuff deflated period...
May 19, 2016: Journal of Nephrology
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