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	Torr - Wikipedia, the free encyclopedia
		Normal atmospheric pressure can support around 760 mm of mercury; hence 1/760 of an atmosphere, or 1 mm of mercury (mmHg), has been a convenient measure of pressure for a long time, and is sometimes also called a torr.
		Because the standard atmosphere has been precisely defined (10th CGPM, 1954), and the standard atmosphere had previously been defined as 760 mmHg exactly, those two definitions are now combined to define the torr as exactly 101325/760 ≈ 133.3223684 pascals.
		Although they are synonyms in practice, the torr and millimetre of mercury are very slightly different by virtue of their definitions in British Standard BS 2520 ([1], [2]).
	en.wikipedia.org /wiki/Mm_Hg (389 words)

	THE MERCK MANUAL OF GERIATRICS, Ch. 85, Hypertension
		Isolated systolic hypertension (ISH) is defined as systolic BP >= 140 mm Hg and diastolic BP <= 90 mm Hg.
		When BP is 115/75 to 185/115 mm Hg, each increase of 20 mm Hg in systolic BP or 10 mm Hg in diastolic BP doubles the risk of cardiovascular disease for people between ages 40 and 70.
		People with systolic BP 120 to 139 mm Hg or diastolic BP 80 to 89 mm Hg are also at increased risk of these diseases and are considered to be prehypertensive; such people are candidates for lifestyle modifications to reduce risk.
	www.merck.com /pubs/mm_geriatrics/sec11/ch85.htm (2356 words)

	Braun - HOT
		To assess the association between major cardiovascular events and the target blood pressures of 90 mm Hg, 85 mm Hg, and 80 mm Hg during antihypertensive treatment.
		6,264 patients were allocated to the target pressure 90 mm Hg, 6,264 to 85 mm Hg, and 6,262 to 80 mm Hg.
		The optimal protection against combined major cardiovascular endpoints was observed in the range 80-85 mm Hg for diastolic and 130-140 mm Hg for systolic blood pressure.
	www.braun.com /medical/bloodpressure/infocenter/clinicaltrials/hot.html (243 words)

	Millimeters of Hg (Site not responding. Last check: 2007-10-09)
		In the example shown the blood pressure at systole pushes on the Hg column so that the height in the right branch of the manometer is 120 mm of Hg higher than the height in the left branch.
		So, a pressure of 120 mm Hg means a pressure capable of supporting a column of Hg to a height of 120 mm.
		At sea level the atmospheric pressure of the air is 760 mm Hg.
	members.aol.com /Bio50/LecNotes/lecnot16b.html (329 words)

	Doppler
		Normally the peak systolic pressure in the right ventricle is 20 to 25 mm Hg and the right atrial pressure is less than 5 mm Hg.
		This means the pressure gradient (i.e., difference) is 16 mm Hg across the tricuspid valve.
		We have now approximated the pulmonary artery pressure to be 100 mm Hg in systole and 50 mm Hg in diastole.
	www.vmth.ucdavis.edu /cardio/cases/case12/cw.htm (533 words)

	AP Chem
		C the pressure of the vapor in the flask is 754 mm Hg.
		A sample of gas having a volume of 700 mL at a pressure of 3200 mm of Hg is allowed to expand to a volume of 1800 mL.
		C and 980 mm of Hg was found to weigh 12.038g.
	www.anderson1.k12.sc.us /schools/pmhs/dept/ap5.htm (3013 words)

	ChemTeam: Gas Law Problems- Combined Gas Law
		2.00 liters of hydrogen, originally at 25.0 °C and 750.0 mm of mercury, are heated until a volume of 20.0 liters and a pressure of 3.50 atmospheres is reached.
		A gas is heated from 263.0 K to 298.0 K and the volume is increased from 24.0 liters to 35.0 liters by moving a large piston within a cylinder.
		The pressure of a gas is reduced from 1200.0 mm Hg to 850.0 mm Hg as the volume of its container is increased by moving a piston from 85.0 mL to 350.0 mL.
	dbhs.wvusd.k12.ca.us /webdocs/GasLaw/WS-Combined.html (1034 words)

	Doppler
		This is a continuous wave Doppler velocity tracing of the systolic jet in the left atrium.
		It shows that the pressure gradient across the mitral valve is 115 mm Hg.
		This dog's systolic systemic arterial blood pressure was subsequently measured and found to be approximately 170 mm Hg.
	www.vmth.ucdavis.edu /Cardio/cases/case11/spectral.htm (316 words)

	Answers: Cardiac Correlate Question Set
		Assume that pressure in the aorta is kept at 100 mm Hg during the entire cardiac cycle.
		Assume that pressure in the aorta is kept at 100 mm Hg and that venous pressure is 8 mm Hg.
		The P wave is roughly associated with the point having a volume coordiante of approximately 150 ml and a pressure coordinate of 7 mm Hg.
	www.uth.tmc.edu /~wweems/cycle_cor/cardia-prob.htm (907 words)

	OBGYN.net - Definitions of Preeclampsia
		"Hypertension is defined as a diastolic blood pressure of at least 90 mm Hg or a systolic blood pressure of at least 140 mm Hg, or a rise in the former of at least 15 mm Hg or in the latter of 30 mm Hg.
		"Pregnancy-induced hypertension is defined as a blood pressure of 140/90 mm Hg during the second half of pregnancy in a previously normotensive woman.
		If prior blood pressure is not known, readings of 140/90 mm Hg or greater after 20 weeks' gestation are considered sufficiently elevated to satisfy the blood pressure criteria of preeclampsia.
	www.obgyn.net /english/ob/Preeclampsia_Definitions.htm (778 words)

	ASH: Drug Algorithm Helps Clinicians Control Blood Pressure (Site not responding. Last check: 2007-10-09)
		In fact, doctors in a clinical setting who adhered to such a regimen were able to obtain the widely recommended blood pressure goal of 140/90 mm Hg or less in most patients in their clinical practice, regardless of race, using olmesartan medoxomil, a new long-acting angiotensin receptor blocker, as their base therapy.
		At subsequent four-week intervals, treatment for subjects who had not attained the blood pressure goal of 130/85 mm Hg or less at each point was modified stepwise with titration of olmesartan medoxomil, addition of the diuretic hydrochlorothiazide, and titration of amlodipine.
		In addition, 97.2 percent of subjects were considered responders (defined as a diastolic blood pressure of less than 90 mm Hg or a reduction in diastolic blood pressure of at least 10 mm Hg) to the olmesartan medoxomil-based regimen.
	www.docguide.com /dg.nsf/PrintPrint/F1820D78FC2A624B85256BBE0051475C (461 words)

	Blood Pressure Guidelines - New - High Blood Pressure (hypertension) and related information on MedicineNet.com
		In persons older than 50 years a systolic, or upper, blood pressure of more than 140 mm Hg is a much more important cardiovascular disease risk factor than the diastolic blood pressure.
		Individuals with a systolic blood pressure of 120 to 139 mm Hg or a diastolic blood pressure of 80 to 89 mm Hg should be considered as pre-hypertensive and they require health-promoting lifestyle modifications to prevent cardiovascular disease.
		If blood pressure is more than 20/10 mm Hg above goal blood pressure, consideration should be given to initiating therapy with 2 agents, 1 of which usually should be a thiazide-type diuretic.
	www.medicinenet.com /script/main/art.asp?articlekey=23356 (839 words)

	CH 222
		mm Hg pressure, what volume will it occupy at 760.
		mm Hg and 25°C? What is the density of N
		A gas sample with a mass of 2.71 g occupies 1.29 L at 18°C and 765 mm Hg.
	web.cocc.edu /zziegler/g_chem_winter/worksheets/workshtgaslaws.htm (448 words)

	Bluegrass Oxygen - Coverage Criteria (Site not responding. Last check: 2007-10-09)
		When a PO of greater than 55 mm Hg is submitted, the service will be denied as not medically necessary unless "Group II" criteria are met.
		In this case, supplemental oxygen is provided for during exercise if it is documented that the use of oxygen improves the hypoxemia that was demonstrated during exercise when the patient was breathing room air.
		Medicare must presume that home use of oxygen is not medically necessary for patients with arterial PO levels at or above 60 mm Hg or an arterial oxygen saturation at or above 90%.
	www.bluegrassoxygen.com /index.cfm/coverage.html (646 words)

	New Page 3
		On admission, her blood pressure was noted to be 170/110 mm Hg; she responded to additional doses of methyldopa and labetalol.
		When she entered the operating room, following an infu-sion of 1,500 mL of lactated Ringer's solution, her blood pressure was 160/110 mm Hg with heart rate of 110 beats/mint A multiorifice epidural catheter was placed uneventfully at the L3-interspace with the patient in the sitting position, using a midline approach.
		Surgery began and proceeded uneventfully, with blood pressures ranges of 130-150 mm Hg systolic and 65-80 mm Hg diastolic and heart rate of 100- 120 beats/min on a continuous infusion of SNP.
	www.nysora.com /publications/epi-containing_la3.htm (472 words)

	Guidelines and Goals in the Management of Hypertension
		DBP levels were 77 mm Hg at the beginning of the trial and 68 mm Hg at 5 years in the treated group, vs 76 and 71 mm Hg, respectively, in the placebo group -- a difference of only -1/-3 mm Hg DBP between the 2 groups at trial beginning and end.
		A subset analysis of the patients who achieved SBP levels andlt; 140 mm Hg indicates additional benefit as pressure was lowered.
		For example, it is often noted that as SBP decreases from 180 to 160 or 150 mm Hg in an elderly patient, he or she feels tired or is unwilling to increase medication further.
	www.medscape.com /content/2003/00/44/76/447609/447609.xml (1259 words)

	Monitoring
		Normal cerebral blood flow is maintained with CPP by autoregulatory factors ranging from 40 - 130 mm Hg.
		B waves are sharp, small waves with pressure up to 50 mm Hg, they correspond to changes in respirations and may be caused by variations in cerebral blood flow.
		C waves are small rhythmic waves with pressure up to 20 mm Hg that occur at a rate of up to 6 per minute.
	www.csufresno.edu /nursing/n140/studassign/Grp9/Monitoring.html (282 words)

	UMass Lowell Freshman Chemistry Lab
		C and had a mercury height of 759.9 mm Hg.
		You'll remember that in this experiment you had to measure in millimeters, with a ruler or meterstick, the difference in height between the level of the water in the gas tube and that in the trough or beaker.
		Since we measure the pressure of gases in units of mm Hg (torr), we can convert the pressure due to the 35.2 mm of water into the equivalent level of Hg which would have the same pressure, by using the densities of mercury (13.596 g/mL) and water (0.99751 g/mL at the temperature of my experiment.
	faculty.uml.edu /james_hall/84123/10.htm (1260 words)

	Westgard QC, Basic Planning for Quality 11: Blood Gas Applications
		Averaging the results from the other four specimens gives an SD of 7.1 mm Hg and a CV of 5.5%.
		Method bias is observed to be 0.2 mm Hg at the mean of the comparison data (at approximately 40 mm Hg).
		The quality requirement at 40 mm Hg would be 5 mm Hg or 12.5%.
	www.westgard.com /lesson59.htm (1371 words)

	DENTAL MANAGEMENT OF PATIENTS WITH HYPERTENSION (Site not responding. Last check: 2007-10-09)
		When treating patients with hypertension in an oral health care setting, the goals are to develop and implement timely preventive and therapeutic strategies compatible with the patient's physical and emotional ability to undergo and respond to dental care; as well as with the patient's social, psychological, and emotional needs and desires.
		In one study comparing the blood pressure during dental examination and dental treatment, a mean difference of only 8 mm Hg (systolic) and 1 mm Hg (diastolic) was noted with the most traumatic procedure (oral surgery).
		Another report concluded that while the actual administration of the local anesthetic agent may produce a transient increase in blood pressure, the blood pressure decreases after the needle is removed from the mouth.
	smile.uthscsa.edu /faculty/terezhalmy/utdrugref/systemic/HTN_Guide.html (928 words)

	[No title]
		Calculate the volume of the gas at 0(C and 760 mm of Hg.
		The volume of a gas is 800 l at 750 mm of Hg and 30(C. What volume will the gas occupy at 710 m of Hg and 30(C? A gas has a volume of 500 ml at 700 mm.
		Calculate the volume of the gas at 720 mm of Hg at 40(C. 1 liter of H2 was measured at STP.
	bnaddy.columbiastate.edu /HANDOUTS/GASEOUS.DOC (1791 words)

	The MSDS HyperGlossary: Pressure Unit Conversions
		Based on the original Torricelli barometer design, one atmosphere of pressure will force the column of mercury (Hg) in a mercury barometer to a height of 760 millimeters.
		A pressure that causes the Hg column to rise 1 millimeter is called a torr (you may still see the term 1 mm Hg used; this has been replaced by the torr).
		1 atm = 101,325 Pascals = 760 mm Hg = 760 torr = 14.7 psi.
	www.ilpi.com /msds/ref/pressureunits.html (639 words)

	World Hypertension League (Site not responding. Last check: 2007-10-09)
		Age adjusted prevalence of hypertension at (160/95 mm Hg declined from 20% to 14%, and at (140/90 mm Hg declined from 36.3% to 20.4% in NHANES III.
		Age adjusted prevalence of hypertension at 160/95 mm Hg declined from 20% to 14% in 1988-91 survey.
		Hypertension awareness increased substantially to 89% for 160/95 mm Hg and 73% for 140/90 mm Hg.
	www.meduohio.edu /org/whl/usainter.html (878 words)

	Vaccon Vacuum Products: Glossary of Terms (Site not responding. Last check: 2007-10-09)
		Vacuum level is effected by elevation and barometric pressure.
		The volume of free air induced by the vacuum pump per unit of time.
		= 29.92" Hg = 760 mm Hg 1mm Hg = 1 torr
	www.vaccon.com /glossary.htm (138 words)

	[No title]
		The aim of the study was: 1) to determine the links between hydrodynamic and design features favorable for mitral or tricuspid position using hydrodynamic tests; 2) to evaluate and classify the valve defects negatively affecting bioprosthetic function.
		The first one simulated mitral (Patrium=10-12, Pventricle=100-150 mm Hg) or tricuspid (Patrium=4-5, Pventricle=40-50 mm Hg) position.
		3 mm) in the one leaflet base or those of 2-3 mm in two or every leaflets.
	www.icr-heart.com /biennial2003/files/16865.doc (264 words)

	Journal of Family Practice: Does lowering diastolic BP to less than 90 mm Hg decrease cardiovascular risk? (Site not responding. Last check: 2007-10-09)
		Among treated patients, overall death rate was lowest with a DBP in the range of 76 to 85 mm Hg; among controls the nadir was 86 to 95 mm Hg.
		The lowest incidence of cardiovascular events occurred at a mean DBP of 82.6 mm Hg and fewest cardiovascular deaths at 86.5 mm Hg.
		Target blood pressure goals are <140/90 mm Hg in uncomplicated hypertension and <130/80 mm Hg for individuals with diabetes or kidney disease.
	www.findarticles.com /p/articles/mi_m0689/is_2_53/ai_113299036 (1110 words)

	Is Your Blood Pressure Too High?
		For example, a blood pressure of 165/94 mm Hg should be classified as stage 2 hypertension.
		Although "optimal blood pressure" is defined as a blood pressure of less than 120/80 mm Hg, unusually low readings should also be evaluated.
		Anyone with a systolic blood pressure of 180 mm Hg or more, or a diastolic blood pressure of 110 mm Hg or more, should receive care immediately, or within one week at most.
	www.ehealthmd.com /library/highbp/HBP_high.html (693 words)

	CHEST: Unexplained pulmonary hypertension is associated with systolic arterial hypertension in patients undergoing ... (Site not responding. Last check: 2007-10-09)
		Of 1,174 patients, 503 had PHTN (defined as a SPAP of [greater or less than] 40 mm Hg), of whom 42 (8.4%) had unexplained PHTN.
		Results: The mean SPAP of those patients with unexplained PHTN was 48 [+ or -] 9 mm Hg vs 31 [+ or -] 5 mm Hg for those without unexplained PHTN.
		The mean SPAP was 48 [+ or -] 9 mm Hg in the PHTN group (range, 40 to 75 mm Hg), and 31 [+ or -] 5 mm Hg in the control population (p < 0.0001).
	www.findarticles.com /p/articles/mi_m0984/is_3_123/ai_99236176 (1131 words)

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