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Topic: Barostat

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	Hypertension-Treatment by Lifestyle Change-DASH-PREMIER
		The details of this "barostat" are not known.
		In "primitive" societies average blood pressure is very low but in "developed" societies high blood pressure occurs in up to 30% of adults and increasingly in children.
		In spite of the profound effect of lifestyle change on blood pressure all trials of hypertension drugs have not used lifestyle change as the first line of treatment, a clearly unethical approach.
	www.panaceia-or-hygeia.com /Hypertension/Hypertension.html (363 words)

	Barostat - wiki.gromacs.org
		Ramon Garcia Fernandez: The implementation of the Rahman Parrinello barostat does not match the one published in M. Parrinello, A. Rahaman J. Appl.
		Ramon: Although there is some ongoing work to enhance the barostat with Gromacs, the current barostat can be made more accurate with a painless change.
		Michael Shirts: I've got a working version of the Anderson barostat (Parrinello-Rahman is the generalization that allow nonisotropic changes), but it will require velocity verlet to be implemented in them main code to work correctly, as Erik mentioned.
	wiki.gromacs.org /index.php/Barostat (467 words)

	Barostat - Psychology Wiki - a Wikia wiki
		Barostat - Psychology Wiki - a Wikia wiki
		A barostat is a pneumatic pump used in Neurogastroenterology research.
		Computer-driven barostats have widely been used to assess sensation and pain thresholds in the gut.
	psychology.wikia.com /wiki/Barostat (421 words)

	Barostat - Wikipedia, the free encyclopedia
		A barostat is a pneumatic pump used in Neurogastroenterology research.
		Its main principle is providing constant pressures in a balloon by means of a piston pump.
		Computer-driven barostats have widely been used to assess sensation and pain thresholds in the gut.
	www.sciencedaily.com /encyclopedia/barostat (321 words)

	Therapy for functional dyspepsia - Patent 6986882
		Using barostat techniques and ultrasonography it has been shown that the reservoir function of the proximal stomach is abnormal in a significant proportion of FD patients.
		At the beginning of the ramp period when the barostat starts increasing the pressure in the stomach the velocity of the infused pump is dependent on, among other things, the elasticity of the stomach.
		The barostat, then, in order to be able to increase the pressure linearly as preset, will increase the velocity of the influent air into the stomach as can be seen in the change in the velocity (slope) of the second part of the volume curve.
	www.freepatentsonline.com /6986882.html (4516 words)

	Ejection
		Due to differential pressure, the q-actuated selector allows activation of a 1-second TDI to the barostat lock initiator and blocks propagation to the rocket motor upper nozzle when aircraft speed is less than 300 knots.
		The post ejection system consists of the barostat lock initiator, the recovery parachute catapult, the recovery parachute, a 3.0-second TDI, a 7.0-second TDI, the impact attenuation bag, the UHF antenna, the recovery parachute repositioning release retractor, and the stabilization/brake parachute cutters.
		The barostat lock initiator is located on the explosive component support bracket in the rocket motor compartment.
	f-111.net /ejection.htm (4754 words)

	FB-111A.net
		Upon activation of the barostat lock initiator, the aneroid bellows are released to begin functioning, and the firing pins are released to bellows control.
		The firing pins are retained by the bellows until the crew module falls to between 14,000 and 16,000 feet.
		When the barostat lock initiator firing pins are released, detonation propagation is continued to the recovery parachute cover FLSC and the recovery parachute catapult.
	www.fb-111a.net /Module.html (1028 words)

	APStracts 10:0195G, 2003. (Site not responding. Last check: )
		Mechanosensitivity was evaluated using a barostat with a double- random staircase distension protocol.
		Barostat pressure-volume relationships were used to report esophageal body compliance.
		Barostat pressures for initial sensation and mild discomfort were not significantly different for patients and controls.
	www.uth.tmc.edu /apstracts/2003/gastro/September/195g.html (319 words)

	Nizatidine Enhances the Gastrocolonic Response and the Colonic Peristaltic Reflex in Humans -- Sun et al. 299 (1): 159 ... (Site not responding. Last check: )
		Antral distension at 300 ml evoked a marked decrease in the volume of the colonic barostat bag, indicating an increase in colonic motor activity.
		There were no differences between the colonic barostat bag volumes following administration of famotidine and placebo at the three distending volumes, but the increases in colonic motor activity in response to antral distension at 200 and 300 ml were significantly higher after nizatidine administration.
		B, inflation of the stimulus balloon produced a biphasic response in the distal recording barostat bag: an initial relaxation (i.e., an increase in bag volume) followed by a descending contraction (i.e., a decrease in bag volume).
	jpet.aspetjournals.org /cgi/content/full/299/1/159 (3172 words)

	Chapter 19 (page 87)
		This was done by Azpiroz and Malagelada (l985, G229) who had developed an electronic barostat allowing the measurement of tone by recording changes in the intragastric volume of air.
		The barostat consisted of an intragastric air-filled bag, the pressure in the bag being kept constant electronically.
		Gastric tone could be monitored from the barostat as variations in intrabag volume.
	med.plig.org /19 (924 words)

	Differences in the sensorimotor response to distension between the proximal and distal stomach in humans -- Lee et al. ...
		The 10 cm long distal tip of the barostat tube was positioned over the pylorus and two adherent bags were located in the proximal and distal stomach.
		In the conventional single barostat bag studies, significant proximal gastric relaxation was continuous during the first 40 minutes after the meal (A).
		In the dual barostat bag studies, this significant postprandial relaxation of the proximal stomach was observed only during the first 25 minutes after the meal.
	gut.bmjjournals.com /cgi/content/full/53/7/938 (3589 words)

	Dyspepsia — Complete medical information on this disease of the gastrointestinal track on MedicineNet.com
		A barostat is an instrument that is used to measure pressure and determine the compliance (flexibility) of a gastrointestinal organ.
		The barostat includes a balloon that is placed within a gastrointestinal organ through the mouth or anus.
		In fact, barostats and expertise in their use are available in only a limited number of centers.
	www.medicinenet.com /dyspepsia/page8.htm (476 words)

	Gastric Motility: Comparison of Assessment with Real-Time MR Imaging or Barostat Measurement—Initial Experience -- de ... (Site not responding. Last check: )
		MR imaging is as accurate as barostat measurement in determining
		The barostat was set to maintain a pressure that was 3 mm Hg higher than the minimal distending pressure.
		During the barostat recordings, three-dimensional volume MR images and two-dimensional dynamic MR images were acquired (Fig 1).
	radiology.rsnajnls.org /cgi/content/full/224/2/592 (3132 words)

	ch1
		In the MA-6 and prior missions, the barostats were armed when above the atmosphere during exit flight and thus were in readiness to initiate the parachute-deployment mechanisms when the barostats sensed the appropriate pressure during spacecraft descent through the atmosphere.
		While such barostat malfunctions had not been detected in previous flights or during ground tests, it was believed that an additional safety margin would be desirable because of the unexplained early deployment of the drogue parachute during the MA-6 mission.
		The control barostat did not alter the circuitry that was available to the pilot for manual deployment of the parachutes.
	history.nasa.gov /SP-6/ch1.htm (5271 words)

	Barcelona
		The effect on gastric tone was assessed by barostat.
		Pain thresholds to balloon distension were determined by barostat in the stomach and rectum (with 1 week between the 2 tests).
		manometry and gastric barostat study on 2 separate occasions.
	www.haukeland.no /sagim/barcelona.htm (4301 words)

	Gastric accommodation and motility are influenced by the barostat device: assessment with magnetic resonance imaging -- ... (Site not responding. Last check: )
		Gastric accommodation and motility are influenced by the barostat device: assessment with magnetic resonance imaging -- de Zwart et al.
		The accommodation response observed in the presence of the barostat
		The air-filled barostat bag cannot be visualized separately from "free air." Note that gastric volume is larger in the barostat experiment, both before and after meal ingestion.
	ajpgi.physiology.org /cgi/content/full/292/1/G208 (3774 words)

	[No title]
		In barostat mode, the computer is controlling entirely the pressure within the gastric bag and is also able of acquiring data from other sensor.
		The volume of the bag is constantly feed to a DA converter in order to be able to follow the volume on a chart recorder during the experiment.
		The barostat will be in the same status as upon completion of init barostat subroutine.
	www.rennes.inra.fr /MAD/Madhelp/barostat.html (189 words)

	Fundic accommodation assessed by SPECT scanning: comparison with the gastric barostat -- van den Elzen et al. 52 (11): ...
		We hypothesised that in the absence of a barostat balloon, SPECT
		to the barostat in assessing gastric accommodation, accommodation
		SPECT imaging of the stomach: comparison with barostat, and effects of sex, age, body mass index, and fundoplication.
	gut.bmjjournals.com /cgi/content/full/52/11/1548 (3558 words)

	1203_article_05
		The principle of the barostat, which consists of a pressure transducer connected by an electronical relay to an air pump, is to maintain constant pressure within an intraluminal bag or balloon by injecting or withdrawing the air through a double-lumen catheter.
		Recently, Gregersen (38) emphasized that true changes in tone in tubular organs must be evaluated in terms of changes in length of the circumference or cross-sectional area, and that tone in spherical organs must be evaluated in terms of changes in the surface area.
		The barostat can also record somatovisceral reflexes, such as the gastric relaxation induced by the cold pressure test, that is, hand immersion into iced water (41).
	www.jpp.krakow.pl /journal/archive/1203_s4/articles/05_article.html (5354 words)

	APStracts 9:0125G, 2002. (Site not responding. Last check: )
		The aim was to investigate the effects of the barostat bag on gastric accommodation and transpyloric flow.
		Postprandially, the barostat bag causes dilatation of the antrum due to meal displacement without influencing early gastric emptying.
		This antral dilatation is likely to induce exaggerated proximal gastric relaxation observed in studies using the barostat to evaluate fundic accommodation.
	www.uth.tmc.edu /apstracts/2002/gastro/June/125g.html (355 words)

	STUDY OF VISCERAL SENSITIVITY MEASURED BY RECTAL BAROSTAT IN PEDIATRIC PATIENTS SUFFERING FROM FUNCTIONAL ABDOMINAL PAIN (Site not responding. Last check: )
		BACKGROUND: Decreased threshold of visceral sensitivity measured by a rectal barostat is used as a marker of irritable bowel syndrome (IBS) in adults.
		AIMS: Our purpose is to 1) evaluate the feasibility of rectal barostat in pediatric patients, 2) measure the threshold of rectal visceral sensitivity in children with functional abdominal pain (FAP), 3) determine if the representation of the pain described during the barostat study is similar to the pain reported at home.
		Children were also asked to draw on a standardized human body diagram (the degree of the pain being represented by three colors) their pain experienced at home and during the procedure.
	www.pulsus.com /cddw2004/abs/abs030.htm (367 words)

	Molecular Dynamics at Constant Pressure: The Berendsen Barostat
		It should be noted that one can also use the the extended Nosé-Hoover (extended Lagrangian) formalism of Martyna, which is mentioned in FandS; in the interest of time, we will forego a discussion of this technique.
		Below, I show results of using the Berendsen barostat to induce a pressure jump from 1.0 to 6.0 in a sample of LJ fluid, for various values of the rise time,
		However, it is common to find length scaling barostats used in the literature without reporting how effective they are, measured at least in terms of pressure and its fluctuations.
	www.pages.drexel.edu /~cfa22/msim/node46.html (320 words)

	Fundal dysaccommodation in functional dyspepsia: head-to-head comparison between the barostat and three-dimensional ...
		Fundal dysaccommodation in functional dyspepsia: head-to-head comparison between the barostat and three-dimensional ultrasonographic technique -- Mundt and Samsom 55 (12): 1725 -- Gut
		Fundal dysaccommodation in functional dyspepsia: head-to-head comparison between the barostat and three-dimensional ultrasonographic technique
		was measured using barostat and gastric volume using 3DUS.
	gut.bmj.com /cgi/content/abstract/55/12/1725 (377 words)

	Results Show Promise for Zelnorm in the Treatment of Upper Gastrointestinal Disorders - Health - RedOrbit
		Patients underwent a gastric barostat (balloon) study on two separate occasions, two weeks apart, after five days of pretreatment with placebo or Zelnorm 6 mg b.i.d.
		After introduction of the barostat bag, graded pressure distensions (2 mmHg increments/2 min) were performed to determine gastric compliance (the elasticity of the stomach walls) and the stomach wall's sensitivity to distension.
		The fasting period was examined, as well as the administration of a 10 percent intraduodenal lipid infusion (infusion rate 1 ml/min), and pain sensation thresholds were studied along with proximal gastric compliance (elasticity) by ramp distension at 2 mmHg increments up to a bag volume of 1000 ml.
	www.redorbit.com /news/display?id=150621&source=r_health (2244 words)

	SSAT - 2000 Abstract: 2235: The Influence of Faecal Diversion (Hartman Procedure) on Anorectal Motility and Perception. (Site not responding. Last check: )
		Faecal diversion (Hartman’s operation) is still commonly used as the firststage emergency procedure in complicated diverticular disease.Most of these patients required further restoration of colon continuity (colostomy closure).
		Methods: Anorectal vectorvolume manometry,and rectal barostat study were performed in each patient before and after Hartman’s procedure, as well as following restorative surgery(Hartman’s reversion) using Synectics Motility System and Synectics SVS Barostat.
		During barostat study rectal compliance gradually increased,while rectal perception patterns(maximal tolerable volume, sensitivity index) only slightly increased as compared to postop.
	www.ssat.com /cgi-bin/abstracts/00ddw/2235.cgi?printme=1&affiliation= (387 words)

	Extended Systems for other Ensembles
		This method couples an extra degree of freedom (the thermostat) to the kinetic energy of the system and it has been shown to sample the canonical distribution in the system degrees of freedom while conserving a quantity that is, to within a constant, the Helmholtz free energy.[
		NPT algorithms attempt to maintain constant pressure in the system by coupling the volume of the system to a barostat.
		46] The Melchionna modification to the Hoover barostat is implemented in both NPTi and NPTf.
	oopse.org /doc-v1/node23.shtml (270 words)

	World J Gastroenterol
		METHODS: Fundic tone, gastric sensory responses and antral motility were evaluated in eight healthy volunteers after a probe with two sensors was placed in the antrum and a highly compliant balloon in the fundus.
		Isobaric balloon distentions were performed with a barostat.
		The balloon volume and pressure data from the barostat were fed to the polygraph via an interface (Golden Gate; GandJ Electronics Inc.).
	www.wjgnet.com /1007-9327/11/6676.asp (2895 words)

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