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https://www.readbyqxmd.com/read/28940875/pressure-and-traction-on-a-model-fetal-head-and-neck-associated-with-the-use-of-forceps-kiwi%C3%A2-ventouse-and-the-bd-odon-device%C3%A2-in-operative-vaginal-birth-a-simulation-study
#1
S M O'Brien, C Winter, C A Burden, M Boulvain, T J Draycott, J F Crofts
OBJECTIVE: To determine the pressure and traction forces exerted on a model fetal head by the BD Odon Device, forceps and Kiwi ventouse during simulated births. DESIGN: Simulation study. SETTING: Simulated operative vaginal birth. POPULATION OR SAMPLE: Eighty-four simulated operative vaginal births. METHODS: A bespoke fetal mannequin with pressure sensors around the head and strain gauge across the neck was used to investigate pressure applied over the head, and traction across the neck during 84 simulated births using the BD Odon Device, non-rotational forceps and Kiwi ventouse...
September 2017: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28940503/measuring-arterial-blood-pressure-in-humans-auscultatory-and-automatic-measurement-techniques-for-human-biological-field-studies
#2
Gary D James, Linda M Gerber
Human biologists have been examining arterial blood pressure since they began studying the effects of the environment and culture on the health of diverse populations. The Korotkoff auscultatory technique with a trained observer and aneroid sphygmomanometer is the method of choice for blood pressure measurement in many bioanthropological field contexts. Korotkoff sounds (the first and fifth phases) are the preferred determinants of systolic and diastolic pressure, even in infants, children, pregnant women, and the elderly...
September 22, 2017: American Journal of Human Biology: the Official Journal of the Human Biology Council
https://www.readbyqxmd.com/read/28935379/knotless-double-row-suturebridge-rotator-cuff-repairs-have-improved-self-reinforcement-compared-with-double-row-suturebridge-repairs-with-tied-medial-knots-a-biomechanical-study-using-an-ovine-model
#3
Geoffrey C S Smith, Theresia M Bouwmeester, Patrick H Lam
BACKGROUND: In double-row SutureBridge (Arthrex, Naples, FL, USA) rotator cuff repairs, increasing tendon load may generate progressively greater compression forces at the repair footprint (self-reinforcement). SutureBridge rotator cuff repairs using tied horizontal mattress sutures medially may limit this effect compared with a knotless construct. MATERIALS AND METHODS: Rotator cuff repairs were performed in 9 pairs of ovine shoulders. One group underwent repair with a double-row SutureBridge construct with tied horizontal medial-row mattress sutures...
September 18, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28934789/lack-of-gender-and-age-differences-in-pain-measurements-following-exercise-in-people-with-chronic-whiplash-associated-disorders
#4
Kelly Ickmans, Anneleen Malfliet, Margot De Kooning, Lisa Goudman, Ives Hubloue, Tom Schmitz, Dorien Goubert, Maria Encarnacion Aguilar-Ferrandiz
BACKGROUND: Individuals with chronic whiplash associated disorders (WAD) present persistent pain in the absence of structural pathology. In these people, altered central pain processing and central sensitization are observed. The role of personal factors, such as gender and age, on pain processing mechanisms in chronic WAD, however, is still unclear. OBJECTIVES: This study investigated possible gender- and age-related differences in self-reported and experimental pain measurements in people with chronic WAD...
September 2017: Pain Physician
https://www.readbyqxmd.com/read/28930095/robust-and-practical-non-invasive-estimation-of-local-arterial-wave-speed-and-mean-blood-velocity-waveforms
#5
Remi Kowalski, Richard Beare, Marie Willemet, Jordi Alastruey, Joseph J Smolich, Michael M H Cheung, Jonathan P Mynard
Local arterial wave speed, a surrogate of vessel stiffness, can be estimated via the pressure-velocity (PU) and diameter-velocity (ln(D)U) loop methods. These assume negligible early-systolic reflected waves (RWes) and require measurement of cross-sectionally averaged velocity (U<sub>mean</sub>), which itself is a valuable quantity related to volumetric blood flow. However, RWes may not always be negligible and routine Doppler ultrasound typically provides maximum velocity waveforms or estimates of mean velocity subject to various errors (U<sub>raw</sub>)...
September 20, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28927375/effects-of-lubrication-on-air-sealing-performance-of-a-pediatric-cuffed-tracheal-tube
#6
Hiroko Nishioka, Yutaka Usuda, Go Hirabayashi, Koichi Maruyama, Tomio Andoh
BACKGROUND: Lubrication of cuffed tracheal tubes (CTTs) reduces liquid leakage. However, it is not clear how cuff lubrication influences air leakage. We aimed to test the hypothesis that pretreatment with K-Y jelly, a water-soluble lubricant, would improve the air-sealing performance of pediatric CTTs in a model study. METHODS: We placed Parker Flex-Tip™ CTT with 4.0- and 5.0-mm internal diameter (ID) into a tracheal model with 9- and 12-mm ID. The tracheal model was connected to a test lung ventilated in pressure control mode...
September 19, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28922340/the-impact-of-continuous-non-invasive-arterial-blood-pressure-monitoring-on-blood-pressure-stability-during-general-anaesthesia-in-orthopaedic-patients-a-randomised-trial
#7
Agnes S Meidert, Johanna S Nold, Roman Hornung, Alexander C Paulus, Bernhard Zwißler, Stephan Czerner
BACKGROUND: In patients undergoing general anaesthesia, intraoperative hypotension occurs frequently and is associated with adverse outcomes such as postoperative acute kidney failure, myocardial infarction or stroke. A history of chronic hypertension renders patients more susceptible to a decrease in blood pressure (BP) after induction of general anaesthesia. As a patient's BP is generally monitored intermittently via an upper arm cuff, there may be a delay in the detection of hypotension by the anaesthetist...
September 15, 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/28920806/accuracy-of-noninvasive-anesthetic-monitoring-in-the-anesthetized-giraffe-giraffa-camelopardalis
#8
Mads F Bertelsen, Carsten Grøndahl, George F Stegmann, Cathrine Sauer, Niels H Secher, J Michael Hasenkam, Mads Damkjær, Christian Aalkjær, Tobias Wang
This study evaluated the accuracy of pulse oximetry, capnography, and oscillometric blood pressure during general anesthesia in giraffes (Giraffa camelopardalis). Thirty-two giraffes anesthetized for physiologic experiments were instrumented with a pulse oximeter transmittance probe positioned on the tongue and a capnograph sampling line placed at the oral end of the endotracheal tube. A human size 10 blood pressure cuff was placed around the base of the tail, and an indwelling arterial catheter in the auricular artery continuously measured blood pressure...
September 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28912525/pulse-transit-time-based-continuous-cuffless-blood-pressure-estimation-a-new-extension-and-a-comprehensive-evaluation
#9
Xiaorong Ding, Bryan P Yan, Yuan-Ting Zhang, Jing Liu, Ni Zhao, Hon Ki Tsang
Cuffless technique enables continuous blood pressure (BP) measurement in an unobtrusive manner, and thus has the potential to revolutionize the conventional cuff-based approaches. This study extends the pulse transit time (PTT) based cuffless BP measurement method by introducing a new indicator - the photoplethysmogram (PPG) intensity ratio (PIR). The performance of the models with PTT and PIR was comprehensively evaluated in comparison with six models that are based on sole PTT. The validation conducted on 33 subjects with and without hypertension, at rest and under various maneuvers with induced BP changes, and over an extended calibration interval, respectively...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28904657/risk-factors-for-postoperative-throat-pain-after-general-anaesthesia-with-endotracheal-intubation-at-the-university-of-gondar-teaching-hospital-northwest-ethiopia-2014
#10
Biruk Melkamu Gemechu, Endale Gebreegziabher Gebremedhn, Tadesse Belayneh Melkie
INTRODUCTION: Postoperative sore throat is listed from the top as patients' most undesirable outcome in the postoperative period. It is believed to originate from mucosal dehydration or edema, tracheal ischemia secondary to the pressure of endotracheal tube cuffs, aggressive oropharyngeal suctioning, and mucosal erosion from friction between delicate tissues and the endotracheal tube. Even if the problem was indicated in many literatures, it has never been studied in our country. The study aimed to assess prevalence and factors associated with postoperative sore throat among patients who were operated under general anesthesia with endotracheal intubation...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28904457/delayed-orthostatic-hypotension-a-pilot-study-from-india
#11
Arun Grace Roy, Siby Gopinath, Suresh Kumar, Sudheeran Kannoth, Anand Kumar
INTRODUCTION: Orthostatic hypotension is defined as a sustained decrease in systolic blood pressure of 20 mm Hg or a decrease in diastolic blood pressure of 10 mm Hg within three minutes of standing compared with blood pressure from the sitting or supine position or by head-up tilt-table testing (1). When sustained blood pressure (BP) drop is after three minutes of upright posture it is called delayed orthostatic hypotension (delayed OH) (2). AIM OF THE STUDY: To detect the incidence of delayed orthostatic hypotension in patients referred to our autonomic lab...
July 2017: Annals of Indian Academy of Neurology
https://www.readbyqxmd.com/read/28899749/cyp4a-cyp2c-modulation-of-the-interaction-of-calcium-channel-blockers-with-cyclosporine-on-edhf-mediated-renal-vasodilations-in-rats
#12
Safaa H Hammoud, Amal G Omar, Assaad A Eid, Mahmoud M El-Mas
The endothelium-derived hyperpolarizing factor (EDHF) serves as a back-up mechanism that compensates for reduced nitric oxide (NO)/prostanoids bioavailability. Here we investigated whether (i) under conditions of vascular endothelium dysfunction, the immunosuppressant drug cyclosporine (CSA) upregulates EDHF-dependent renal vasodilations through altering CYP4A/CYP2C signaling, and (ii) calcium channel blockers modulate the CSA/EDHF/CYP interaction. Rats were treated with CSA, verapamil, nifedipine, or their combinations for 7days...
September 9, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28893206/efficacy-of-blood-flow-restriction-exercise-during-dialysis-for-end-stage-kidney-disease-patients-protocol-of-a-randomised-controlled-trial
#13
Matthew J Clarkson, Steve F Fraser, Paul N Bennett, Lawrence P McMahon, Catherine Brumby, Stuart A Warmington
BACKGROUND: Exercise during haemodialysis improves strength and physical function. However, both patients and clinicians are time poor, and current exercise recommendations add an excessive time burden making exercise a rare addition to standard care. Hypothetically, blood flow restriction exercise performed during haemodialysis can provide greater value for time spent exercising, reducing this time burden while producing similar or greater outcomes. This study will explore the efficacy of blood flow restriction exercise for enhancing strength and physical function among haemodialysis patients...
September 11, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28889225/effects-of-blood-flow-restriction-during-moderate-intensity-eccentric-knee-extensions
#14
Michael Behringer, Lars Heinke, Jannik Leyendecker, Joachim Mester
We investigated if blood flow restriction (BFR, cuff pressure 20 mmHG below individual occlusion pressure) increases metabolic stress, hormonal response, release of muscle damage markers, and muscle swelling induced by moderate-intensity eccentric contractions. In a randomized, matched-pair design, 20 male subjects (25.3 ± 3.3 years) performed four sets of unilateral eccentric knee extensions (75% 1RM) to volitional failure with (IG) or without (CG) femoral BFR. Despite significant differences of performed repetitions between IG (85...
September 9, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28888114/carotid-stiffness-extra-media-thickness-and-visceral-adiposity-in-young-adults
#15
Wesley K Lefferts, Susan D Sperry, Randall S Jorgensen, Ari G Kasprowicz, Michael R Skilton, Arturo Figueroa, Kevin S Heffernan
BACKGROUND AND AIMS: Carotid extra-media thickness (EMT) encompasses arterial adventitia and perivascular adipose tissue (PAT). Adventitial remodeling and PAT may contribute independently to functional (stiffness) and structural (remodeling) changes in artery wall properties. Visceral adiposity may contribute to PAT, thereby affecting artery stiffness. We investigated the relationships between carotid artery stiffness, EMT, and visceral adiposity in young, healthy individuals. METHODS: 135 healthy males (20 ± 2 yr, body mass index [BMI] 24...
September 1, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28887862/systolic-blood-pressure-targets-diastolic-j-curve-and-cuff-artefact-in-blood-pressure-measurement-a-note-of-caution
#16
J David Spence
There is good evidence that controlling hypertension reduces the risk of stroke and other cardiovascular consequences of hypertension. The recent Systolic Blood Pressure Intervention Trial (SPRINT) trial, stopped early because of a higher risk among participants randomized to the higher blood pressure target, will no doubt lead to calls for even lower pressures. Even among participants age ≥75, those randomized to a target systolic blood pressure (SBP) < 120 mmHg had a lower risk of stroke and cardiovascular events compared with a SBP target <140 mmHg[1]...
September 8, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28887584/ocular-perfusion-pressure-control-during-pars-plana-vitrectomy-testing-a-novel-device
#17
Tommaso Rossi, Giorgio Querzoli, Aldo Gelso, Giampiero Angelini, Alessandro Rossi, Paolo Corazza, Laura Landi, Serena Telani, Guido Ripandelli
PURPOSE: To study the efficacy of a novel device intended to control infusion pressure based on mean ocular perfusion pressure (MOPP) during pars plana vitrectomy (PPV). METHODS: An arm blood pressure cuff connected to a vitrectomy machine calculated mean arterial pressure (MAP), while a pressure sensor close to the infusion trocar measured intraocular pressure (IOP). MOPP was calculated in real time in 36 consecutive patients undergoing PPV, who were divided into two groups...
September 8, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28880591/remote-ischemic-conditioningpromising-potential-in-wound-repair-in-diabetes
#18
Jano A Boghossian, Bellal Joseph, Marvin J Slepian, David G Armstrong
Remote ischemic conditioning involves the use of a blood pressure cuff or similar device to induce brief (3-5 min) episodes of limb ischemia. This, in turn, seems to activate a group of distress signals that has shown the potential ability to improve healing of the heart muscle and other organ systems. Until recently, this has not been tested in people with diabetic foot ulcers. The purpose of this review was to provide background on remote ischemic conditioning and recent data to potentially support its use as an adjunct to healing diabetic foot ulcers and other types of tissue loss...
July 2017: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/28878301/epa-dha-6-1-prevents-angiotensin-ii-induced-hypertension-and-endothelial-dysfunction-in-rats-role-of-nadph-oxidase-and-cox-derived-oxidative-stress
#19
Zahid Rasul Niazi, Grazielle C Silva, Thais Porto Ribeiro, Antonio J León-González, Mohamad Kassem, Abdur Mirajkar, Azhar Alvi, Malak Abbas, Faraj Zgheel, Valérie B Schini-Kerth, Cyril Auger
Eicosapentaenoic acid:docosahexaenoic acid (EPA:DHA) 6:1, an omega-3 polyunsaturated fatty acid formulation, has been shown to induce a sustained formation of endothelial nitric oxide (NO) synthase-derived NO, a major vasoprotective factor. This study examined whether chronic intake of EPA:DHA 6:1 prevents hypertension and endothelial dysfunction induced by angiotensin II (Ang II) in rats. Male Wister rats received orally corn oil or EPA:DHA 6:1 (500 mg kg(-1) per day) before chronic infusion of Ang II (0...
September 7, 2017: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/28878099/distal-cuff-occlusion-a-novel-simple-approach-for-distal-embolic-protection-in-peripheral-vascular-intervention
#20
Shwan Jalal, Jihad A Mustapha, Howard S Rosman, Rajendra H Mehta, Thomas P Davis
AIM: To evaluate the feasibility, effectiveness, and safety of the cuff-occlusion method for distal embolic protection in peripheral artery disease. METHODS AND RESULTS: We evaluated 61 patients who underwent peripheral vascular intervention (PVI) for infrainguinal lesion at a single center where a blood pressure cuff occlusion method for distal embolic protection was utilized during the procedure. Primary endpoint included incidence of distal embolization, acute limb ischemia, or emergency limb amputation...
September 2017: Journal of Invasive Cardiology
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