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Topic: Residual volume

Related Topics

Tidal volume

Vital capacity

Dead space

Pulmonary function test

Exhalation

Chronic obstructive pulmonary disease

Cardiopulmonary resuscitation

Carbon dioxide

Tobacco smoking

Yulara

Fetus

Altitude

Newark Liberty International Airport

Alive or Just Breathing

Bacteria

	Lung volumes - Wikipedia, the free encyclopedia
		Residual volume (RV) is the amount of air left in the lungs after a maximal exhalation.
		Determination of the residual volume can be done by radiographic planemetry, body plethysmography, closed circuit dilution and nitrogen washout.
		Residual volume (RV): the amount of air that is always in the lungs and can never be expired (i.e.: the amount of air that stays in the lungs after maximum expiration).
	en.wikipedia.org /wiki/Tidal_volume (667 words)

	Emergency Clinical Guide Presents Pulmonary Function Tests
		In severe obstructive ventilatory impairment, however, the vital capacity may be decreased as the increased residual volume and functional residual capacity "encroach" on the vital capacity.
		Functional residual capacity and residual volume are both increased in ankylosing spondylitis, whereas in kyphoscoliosis, functional residual capacity, and possibly residual volume are decreased.
		Due to negative pressure that is generated inside the airways during inspiration, the atmospheric pressure further increases the narrowing of the extrathoracic segment, thereby producing a flattening of the inspiratory loop in a patient with variable extrathoracic obstruction (Figure 7F).
	www.anisman.com /ecg/pulmonary_function.htm (3158 words)

	NGC - NGC Summary
		Residual volume (RV) is the volume of gas remaining in the lung at the end of a maximal expiration.
		It may be calculated by subtracting expiratory reserve volume from functional residual capacity (residual volume = functional residual capacity - expiratory reserve volume) or by subtracting vital capacity (VC) from total lung capacity, or TLC (residual volume = total lung capacity - vital capacity).
		Functional residual capacity is the volume of air in the lung at the average tidal volume end-expiratory level.
	www.guideline.gov /summary/summary.aspx?ss=15&doc_id=2846&nbr=2072 (4134 words)

	What is the closing volume?
		However, these alveoli are also vulnerable: as they have the lowest resting volume, they also have the lowest resting pressure and by inference the lowest gradient to the mouth: and are the first airways to be compressed during active expiration.
		This is important because, during active emptying of the lungs, these airways close off long before residual volume is reached: the point at which this begins to occur is known as the closing volume (the closing volume plus the residual volume is the closing capacity).
		In pathological conditions, or where tidal volumes are low or where the patient does not sigh or yawn, airways may remain collapsed throughout the respiratory cycle: this lead to a situation whereby lung units may be ventilated but not perfused (low V/Q) – shunt and venous admixture.
	www.ccmtutorials.com /rs/PEEP/page4.htm (616 words)

	Body Plethysmography (Site not responding. Last check: 2007-10-18)
		Theincrease in their chest volume slightly reduces the box volume (the non-person volume of the box)and thus slightly increases the pressure in the box.
		The difference between thisvolume and the initial volume of the box, is the change in volume of the box, which is the same asthe change in volume of the chest.
		We set the initial volume of the chest (unknown) times the initial pressure at the mouth(known), equal to the inspiratory volume of the chest (the same unknown volume plus the change inthe volume of the chest, which we have just computed) times the pressure at the mouth during theinspiratory effort (known).
	oac.med.jhmi.edu /res_phys/Encyclopedia/BodyPleth/BodyPleth.HTML (357 words)

	Shape and volume change in the transtibial residuum over the short term: Preliminary investigation of six subjects (Site not responding. Last check: 2007-10-18)
		Residuum volume decreased by an average of 6.5 percent for a "normal" suction socket, but increased by an average of 3.7 percent when a vacuum was applied between the socket and liner.
		Volume change for Subject 2 was less than that for other subjects; the low signal-to-noise ratio may explain the scatter in that subject's data.
		Volume fluctuations in the residual limbs of lower limb amputees.
	www.vard.org /jour/04/41/5/zachariah.html (6610 words)

	Untitled Document
		Because this block was uncut, the residual is the same as the original.
		Block 4 is treated with an integrated thinning that removes stems from the pulp as well as the sawtimber size classes.
		This area-wide thinning is intended to improve the growth, vigor, and species composition of the residual stand.
	www.dnr.cornell.edu /ext/forestrypage/sfda/mapandummary/blocksummaries.htm (691 words)

	[No title]
		LUNG VOLUME AND CAPACITIES The total volume contained in the lung at the end of a maximal inspiration is subdivided into volumes and subdivided into capacities.
		The volume of air remaining in the lung at the end of a normal expiration.
		Residual Volume is determined by one of 3 techniques.
	www.ursa.kcom.edu /Department/LectureNotes/Summer/LungVolumes.doc (1207 words)

	Volume of Human Lungs
		Tidal volume is the amount of air taken into the lungs in a single breath.
		Vital capacity is the maximum volume expelled after maximal inspiration.
		The residual volume is usually 25 % of the TLC while the Vital capacity makes up the other 75%.
	hypertextbook.com /facts/2001/LaurenCalabrese.shtml (399 words)

	[No title]
		Residual volume is the only lung volume that cannot be measured directly and requires expensive equipment, such as gas analyzers to do so.
		Residual Volume is essential during hydrostatic weighing and must be calculated if a weight is to be determined accurately.
		It is in regards to the observed volume of a measurement where as the ATPS is in regards to the gas volume.
	www.willamette.edu /~jstout/Lab7.doc (964 words)

	SOLUTION - LoveToKnow Article on SOLUTION (Site not responding. Last check: 2007-10-18)
		The residual liquid would thus E become richer in B, and the tem2t ~ ~\ perature and composition would pass along the curve till E, the eutectic point, was reached.
		But as we ascend in an atmosphere the pressure diminishes; hence the pressure of the vapour in the chamber is less the higher we go, and thus eventually we reach a state of equilibrium where the column of vapour is in equilibrium at the appropriate level both with solvent and solution.
		The variation of gases from Boyles law is represented in the equation of Van der Waals by subtracting a constant b from the total volume to represent the effect of the volume of the molecules themselves.
	11.1911encyclopedia.org /S/SO/SOLUTION.htm (13106 words)

	In a Puff of Smoke - Take a Deep Breath - Lung Capacity - Teacher's Guide
		The tidal volume is the volume of air inhaled or exhaled with each normal breath.
		The residual volume is the volume of air remaining in the lungs after the most powerful expiration.
		It is the sum of the vital capacity and the residual volume.
	www.chemheritage.org /educationalservices/pharm/tg/chemo/activity/capacity.htm (640 words)

	ImpulseAdventure - Freediving Blog / Journal
		The minimum volume of air that is contained in the lungs after a complete exhale is the residual volume.
		For freediving, one would typically want the ratio of total lung capacity to residual volume to be as high as possible, thereby increasing the theoretical depth at which the lung volume has reached residual volume.
		Volume of air that is forcibly exhaled in the first second expressed as a percentage of the total forced exhale volume
	www.impulseadventure.com /freedive/journal.html (7714 words)

	Pulmonary Function Lab Quiz (Site not responding. Last check: 2007-10-18)
		is the functional residual capacity and increases with increasing height.
		is proportional to lung volume in healthy individuals and thus normally diminishes with exhalation.
		Poor effort with a failure to reach residual volume during the forced expiration.
	human.physiol.arizona.edu /CGI/PFLabQuiz.html (224 words)

	OILVOL
		OILVOL also computes the volume of hydrocarbon that can be recovered with skimmers and the residual product volume that is trapped in the unsaturated and saturated zones when the air-oil table falls and the oil-water table rises during skimming, respectively.
		The specific oil volume at each grid node is multiplied by the respective nodal surface area to compute the volume of free hydrocarbon at the node, and these are summed to obtain the total free product volume (before skimming) in the soil.
		The actual volume of free hydrocarbon per unit area in the soil (true product thickness or specific oil volume) is less than the observed hydrocarbon thickness in the monitoring well.
	www.mpassociates.gr /software/environment/oilvol.html (976 words)

	Clinical agreement between automated and calculated ultrasound measurements of bladder volume -- Dudley et al. 76 ...
		Errors (and 95% confidence intervals, CI) in the estimation of voided volume by ultrasound imaging, using the single coefficient of 0.72 and the shape dependent coefficients suggested by Bih et al [11]
		The accuracy of portable ultrasound scanning in the measurement of residual urine volume.
		Kjeldsen-Kragh J. Measurement of residual urine volume by means of ultrasonic scanning: a comparative study.
	bjr.birjournals.org /cgi/content/full/76/911/832 (1426 words)

	NGC - NGC Summary (Site not responding. Last check: 2007-10-18)
		Determining the volume of residual urine by ultrasonography.
		A volume exceeding 100 mL is abnormal, and a volume exceeding 200 mL is usually an indication of treatment.
		The volume of the prostate can be measured by using the same formula.
	www.guideline.gov /summary/summary.aspx?doc_id=6533 (481 words)

	A novel non-invasive technique for measuring the residual lung volume by nitrogen washout with rapid thoracoabdominal ...
		Volume was corrected for the effective dead space of the face mask and the slide valve port
		The infant is hyperventilated by occluding the expiratory limb of the Y adapter (fig 1A).
		Funtional residual capacity and thoracic gas volume in normoxic and hyperoxic newborn infants.
	thorax.bmjjournals.com /cgi/content/full/54/10/874 (5749 words)

	A Volume-Adaptable Prosthesis for Ankle Disarticulation - Journal of Prosthetics and Orthotics, 1993 \| American Academy ...
		Significant residual limb volume fluctuation and changes in geometry normally require frequent adjustments by the prosthetist and compliance by the patient.
		Altering the number of prosthetic socks is generally used to provide some measure of volume adaptability; however, when the number of prosthetic socks used is increased, pistoning and shearing also increase, further stressing a compromised, healing surgical wound.
		The potential morbidity related to these residual limb size and shape changes can be decreased by providing volume adaptability and using flexible materials in fabricating the prosthetic socket.
	www.oandp.org /jpo/library/1993_03_077.asp (912 words)

	[No title] (Site not responding. Last check: 2007-10-18)
		Normally the only volume of dead space is that amount of gas within the conducting airways.
		RESIDUAL VOLUME (RV) Residual volume = the volume of air remaining in lung after blowing out as much air as possible (i.e., after exhaling the ERV).
		Since the He doesn't cross the alveolar membrane, the volume of FRC can be determined by comparing the initial and final concentrations of He.
	www.meddean.luc.edu /lumen/MEdEd/mech/lectures/gar55.doc (1615 words)

	Alfuzosin and postvoid residual urine volume
		High postvoid urinary volume was correlated with low maximum urinary flow rate in men with benign prostatic hyperplasia.
		Postvoid residual urine in patients with lower urinary tract symptoms suggestive of benign prostatic hyperplasia: pooled analysis of eleven controlled studies with alfuzosin.
		All data was used to establish a relationship at baseline between post void urinary volume (PVR) and maximum urinary flow rate.
	www.jr2.ox.ac.uk /bandolier/booth/Mens/PVR.html (361 words)

	[No title]
		\par \par RV (residual volume \endash always there) = 1.2 L \par ERV (expiratory reserve volume) = 1.1 L \par TV (tidal volume) = 0.5 L \par IRV (inspiratory reserve volume) = 3.0 L \par TLC (total lung capacity) = 5.5 L \par \tab It is usually 5.8 L in a healthy young male.
		There is an increase in RV (residual volume) and air is trapped in the lungs.
		There is nothing to prove that a patient can decrease his residual volume after it had increased.
	www.rollanet.org /~mhall/ClassNotes6/Cardio/Cardio-11-02-98.doc (1235 words)

	Easing Patient discomfort - January 2002 - Rehab Management - The Interdisciplinary Journal of Rehabilitation
		To get an accurate reading of postvoid residual urine, the ultrasound scan must be performed on the patient within 15 to 20 minutes after the void.
		According to a 1995 study of a bladder ultrasound program implemented at one rehabilitation facility, 79% of postvoid residuals done by bladder ultrasound found volumes of 100 cc or less, and catheterization was avoided for these patients.
		In cases where a reading shows a large postvoid residual volume, different facilities have different parameters to determine if they are going to catheterize the patients, Cox says.
	www.rehabpub.com /features/12002/4.asp (1352 words)

	Diagnostic Tests for Chronic Obstructive Pulmonary Disease - CureResearch.com
		While many measures of lung function have been developed, those most commonly used determine: 1) air-containing volume of the lung (lung volume), 2) the ability to move air into and out of the lung, 3) the rate at which gases diffuse between the lung and blood, and 4) blood levels of oxygen and carbon dioxide.
		The three volume measures most relevant to COPD are forced vital capacity (FVC), residual volume (RV), and total lung capacity (TLC).
		This volume may also be expressed in terms of the percent of the vital capacity which can be expelled in 1 second.
	www.cureresearch.com /c/copd/tests.htm (975 words)

	Measurement of Neonatal Residual Volume
		The ratio of total lung capacity/residual volume does not change much throughout development; as a result, the average residual volume of a neonate would be about 12 ml's.
		But we later found out that although the lung volume is proportional to impedance, the change in lung volume was not proportional to the change in impedance.
		The volume and concentration of He in the exhaled gas is then measured.
	www.bme.vanderbilt.edu /King/failure_report1.htm (1461 words)

	Neurogenic bladder
		Contraction of an underactive bladder with normal bladder volumes may be stimulated with parasympathomimetics (drugs that mimic the action resulting from stimulation of the parasympathetic nerves) such as bethanechol (Urecholine).
		The amount of urine remaining in the bladder (residual volume) is estimated by a comparison of fluid intake and output.
		Catheterization intervals are lengthened as the residual urine volume decreases and catheterization may be discontinued when urine residuals are at an acceptable level to prevent urinary tract infection.
	www.healthatoz.com /healthatoz/Atoz/ency/neurogenic_bladder.jsp (1638 words)

	Clinical Studies - Diagnostic Ultrasound
		"Ultrasonic Validation of Residual Bladder Volume in Postvaginal Hysterectomy Patients." Gynecologic and Obstetric Investigation 31 (1991): 226-30.
		Bladder volume was determined by finding the largest cross-sectional image of the bladder, and measuring its height and depth axes.
		* "The ultrasonographic screening method is a simple, noninvasive test which appears to be ideal for the bedside assessment of residual urine volume in postvaginal hysterectomy patients." Despite its lack of sensitivity, its negative predictive value makes non-portable ultrasound an effective means of determining which patients do not need catheterization.
	www.dxu.com /clinical_Maymonetal.htm (433 words)

	BME 403: Respiratory Section (Site not responding. Last check: 2007-10-18)
		The 3-Breath method is a clever way to measure exactly how much volume is in a person's Residual Volume.
		The goal of this is to allow the bag of pure oxygen to equilibrate with the residual lung volume filled with moist air.
		Since we know the original volume of the bag, and the original concentration of gas in the bag, and the final concentration of gas in the bag, we can now find the original volume (the Residual Volume) of gas in the subject's lungs.
	www.usc.edu /dept/biomed/bme403/Section_1/3breath.html (232 words)

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