arterial blood pressure


Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia.

pressure

 (P) [presh´ur]
force per unit area.
arterial pressure (arterial blood pressure) blood pressure (def. 2).
atmospheric pressure the pressure exerted by the atmosphere, usually considered as the downward pressure of air onto a unit of area of the earth's surface; the unit of pressure at sea level is one atmosphere. Pressure decreases with increasing altitude.
barometric pressure atmospheric p.
blood pressure
2. pressure of blood on walls of any blood vessel.
capillary pressure the blood pressure in the capillaries.
central venous pressure see central venous pressure.
cerebral perfusion pressure the mean arterial pressure minus the intracranial pressure; a measure of the adequacy of cerebral blood flow.
cerebrospinal pressure the pressure of the cerebrospinal fluid, normally 100 to 150 mm Hg.
continuous positive airway pressure see continuous positive airway pressure.
filling pressure see mean circulatory filling pressure.
high blood pressure hypertension.
intracranial pressure see intracranial pressure.
intraocular pressure the pressure exerted against the outer coats by the contents of the eyeball.
intrapleural pressure (intrathoracic pressure) pleural pressure.
intrinsic positive end-expiratory pressure elevated positive end-expiratory pressure and dynamic pulmonary hyperinflation caused by insufficient expiratory time or a limitation on expiratory flow. It cannot be routinely measured by a ventilator's pressure monitoring system but is measurable only using an expiratory hold maneuver done by the clinician. Its presence increases the work needed to trigger the ventilator, causes errors in the calculation of pulmonary compliance, may cause hemodynamic compromise, and complicates interpretation of hemodynamic measurements. Called also auto-PEEP and intrinsic PEEP.
maximal expiratory pressure maximum expiratory pressure.
maximal inspiratory pressure the pressure during inhalation against a completely occluded airway; used to evaluate inspiratory respiratory muscle strength and readiness for weaning from mechanical ventilation. A maximum inspiratory pressure above −25 cm H2O is associated with successful weaning.
maximum expiratory pressure (MEP) a measure of the strength of respiratory muscles, obtained by having the patient exhale as strongly as possible against a mouthpiece; the maximum value is near total lung capacity.
maximum inspiratory pressure (MIP) the inspiratory pressure generated against a completely occluded airway; used to evaluate inspiratory respiratory muscle strength and readiness for weaning from mechanical ventilation. A maximum inspiratory pressure above −25 cm H2O is associated with successful weaning.
mean airway pressure the average pressure generated during the respiratory cycle.
mean circulatory filling pressure a measure of the average (arterial and venous) pressure necessary to cause filling of the circulation with blood; it varies with blood volume and is directly proportional to the rate of venous return and thus to cardiac output.
negative pressure pressure less than that of the atmosphere.
oncotic pressure the osmotic pressure of a colloid in solution.
osmotic pressure the pressure required to stop osmosis through a semipermeable membrane between a solution and pure solvent; it is proportional to the osmolality of the solution. Symbol π.
partial pressure the pressure exerted by each of the constituents of a mixture of gases.
peak pressure in mechanical ventilation, the highest pressure that occurs during inhalation.
plateau pressure in mechanical ventilation, the pressure measured at the proximal airway during an end-inspiratory pause; a reflection of alveolar pressure.
pleural pressure the pressure between the visceral pleura and the thoracic pleura in the pleural cavity. Called also intrapleural or intrathoracic pressure.
positive pressure pressure greater than that of the atmosphere.
positive end-expiratory pressure (PEEP) a method of control mode ventilation in which positive pressure is maintained during expiration to increase the volume of gas remaining in the lungs at the end of expiration, thus reducing the shunting of blood through the lungs and improving gas exchange. A PEEP higher than the critical closing pressure prevents alveolar collapse and can markedly improve the arterial Po2 in patients with a lowered functional residual capacity, as in acute respiratory failure.
Effects of the application of positive end-expiratory pressure (PEEP) on the alveoli. A, Atelectatic alveoli before PEEP application. B, Optimal PEEP application has reinflated alveoli to normal volume. C, Excessive PEEP application overdistends the alveoli and compresses adjacent pulmonary capillaries, creating dead space with its attendant hypercapnia. From Pierce, 1995.
pulmonary artery wedge pressure (PAWP) (pulmonary capillary wedge pressure (PCWP)) intravascular pressure, reflecting the left ventricular end diastolic pressure, measured by a swan-ganz catheter wedged into a small pulmonary artery to block the flow from behind.
pulse pressure the difference between the systolic and diastolic pressures. If the systolic pressure is 120 mm Hg and the diastolic pressure is 80 mm Hg, the pulse pressure is 40 mm Hg; the normal pulse pressure is between 30 and 40 mm Hg.
urethral pressure the pressure inwards exerted by the walls of the urethra, which must be counteracted in order for urine to flow through; see also urethral pressure profile.
venous pressure the blood pressure in the veins; see also central venous pressure.
water vapor pressure the tension exerted by water vapor molecules, 47 mm Hg at normal body temperature.
wedge pressure blood pressure measured by a small catheter wedged into a vessel, occluding it; see also pulmonary capillary wedge pressure and wedged hepatic vein pressure.
wedged hepatic vein pressure the venous pressure measured with a catheter wedged into the hepatic vein. The difference between wedged and free hepatic vein pressures is used to locate the site of obstruction in portal hypertension; it is elevated in that due to cirrhosis, but low in cardiac ascites or portal vein thrombosis.

ar·te·ri·al blood pres·sure

(ahr-terē-ăl blŭd preshŭr)
Measurement of the force of the movement of blood against the vessels that carry blood away from the heart.

Patient discussion about arterial blood pressure

Q. Does Ameal BP lower high blood pressure?

A. The answer is, CURRENTLY, not. Milk proteins (the class that Ameal BP belongs to) do lower blood pressure in lab studies, but trials in humans have shown mixed results. You should remember that it may interfere with other drugs you may take, so first consult your doctor if it's safe for you.
You may try it and see if it works or not.

More discussions about arterial blood pressure
References in periodicals archive ?
First, the sedentary offspring of the hypertensive group showed impaired total RR interval variance and cardiac sympathovagal balance (LF/HF ratio), although the groups did not differ with regard to clinical arterial blood pressure. Second, the strength-training offspring of hypertensives presented increased total variance in the RR interval and decreased cardiac sympathovagal balance compared to the sedentary group.
Non-invasive measurement of arterial blood pressure in dogs: a potential indicator for the identification of stress.
Therefore, prevention and treatment also have to be multifaceted and involve not only the institution of dietetic management and increased physical activity, but also pharmacotherapy to rebalance lipid parameters, glycaemia and arterial blood pressure [13].
Table 1 shows pulse rate, mean arterial blood pressure, and descending aortic, hepatic, renal, and small intestinal blood flow under 2.0% and 3.0% sevoflurane anesthesia at 37.5[degrees]C before elevation of body temperature.
Arterial blood pressure was measured noninvasively (Datex-Ohmeda S/5 2008).
Arterial blood pressure and cardiovascular responses to yoga practice.
This study analyzed associations between self-perceived health and sex, indicators of adiposity, arterial blood pressure and PA habits in 380 employees of the University Hospital (UH) in Londrina, PR, Brazil.
One of the most dangerous types of systemic secondary insults is hypotension, critically low arterial blood pressure. Hypotension is one type of secondary insult and has been shown to be related to poor outcome [1], [3].
Arterial blood pressure is inversely associated with vascular sympathetic reactivity (isometric handgrip exercise) in Gujarati Indian adolescents.
Third, respiratory efforts can lead to sleep fragmentation, which may activate the sympathetic nervous system and increase arterial blood pressure, leading to hemodynamic disturbances.
In addition, variations in diastolic arterial blood pressure, may play a crucial role in POAG pathogenesis [1-3,5].
We have previously demonstrated that a decrease in total peripheral resistance (TPR) caused by opening an A-V fistula or chronic administration of minoxidil, a potent peripheral vasodilator, does not decrease mean arterial blood pressure in normotensive rats.