Blood pressure is one of the important vital signs. This ppt is for the First year General Nursing and Midwifery (GNM) students to understand the topic with simple language and pictures
The powerpoint presentation on blood pressure covers all the aspects of blood pressure, measurement of blood pressure and factors affecting blood pressure. it also explained the Hypertension and Hypotension in detail.
The pressure of the blood in the circulatory system, often measured for diagnosis since it is closely related to the force and rate of the heartbeat and the diameter and elasticity of the arterial walls.
Cardiac myocytes are short
branched striated muscle cells
Connected with gap junctions
gap junctions transmit
electrical activity between cells
So, cardiac myocytes act as
a single functional unit
(syncitium)1. Rhythmicity
2. Excitability
3. Conductivity
4. Contractility
The powerpoint presentation on blood pressure covers all the aspects of blood pressure, measurement of blood pressure and factors affecting blood pressure. it also explained the Hypertension and Hypotension in detail.
The pressure of the blood in the circulatory system, often measured for diagnosis since it is closely related to the force and rate of the heartbeat and the diameter and elasticity of the arterial walls.
Cardiac myocytes are short
branched striated muscle cells
Connected with gap junctions
gap junctions transmit
electrical activity between cells
So, cardiac myocytes act as
a single functional unit
(syncitium)1. Rhythmicity
2. Excitability
3. Conductivity
4. Contractility
“Cardiac output refers to the volume of blood pumped out per ventricle per minute.”
Cardiac output is the function of heart rate and stroke volume.
STROKE VOLUME:
The amount of blood pumped by the left ventricle in one compression is called the stroke volume.
Heart Rate
The cardiac output increases with the increase in heart rate.
This presentation is an overview of the description of the 4 stages of the cardiac cycle (atrial diastole, atrial systole, ventricular systole, ventricular diastole) as well as explaining the mechanism of the cardiac cycle.
“Cardiac output refers to the volume of blood pumped out per ventricle per minute.”
Cardiac output is the function of heart rate and stroke volume.
STROKE VOLUME:
The amount of blood pumped by the left ventricle in one compression is called the stroke volume.
Heart Rate
The cardiac output increases with the increase in heart rate.
This presentation is an overview of the description of the 4 stages of the cardiac cycle (atrial diastole, atrial systole, ventricular systole, ventricular diastole) as well as explaining the mechanism of the cardiac cycle.
Cardiac output as you know is made up of heart rate and stroke volume. At rest, these are relatively constant however with exercise the heart beats faster, and more blood is pumped out with each beat. These factors both contribute to a rise in BP, as would any other factor that caused the heart to speed up
this is a detailed study on blood pressure measurement on clinical watching , methods , equipment's , common problems ,and all major aspects of blood pressure measurement is mentioned in detail .
please comment
thank you
20.2 Blood Flow, Blood Pressure, and Resistance Get This Book!.docxfelicidaddinwoodie
20.2 Blood Flow, Blood Pressure, and Resistance
Get This Book!
Page by: OpenStax
Summary
By the end of this section, you will be able to:
· Distinguish between systolic pressure, diastolic pressure, pulse pressure, and mean arterial pressure
· Describe the clinical measurement of pulse and blood pressure
· Identify and discuss five variables affecting arterial blood flow and blood pressure
· Discuss several factors affecting blood flow in the venous system
Blood flow refers to the movement of blood through a vessel, tissue, or organ, and is usually expressed in terms of volume of blood per unit of time. It is initiated by the contraction of the ventricles of the heart. Ventricular contraction ejects blood into the major arteries, resulting in flow from regions of higher pressure to regions of lower pressure, as blood encounters smaller arteries and arterioles, then capillaries, then the venules and veins of the venous system. This section discusses a number of critical variables that contribute to blood flow throughout the body. It also discusses the factors that impede or slow blood flow, a phenomenon known as resistance.
As noted earlier, hydrostatic pressure is the force exerted by a fluid due to gravitational pull, usually against the wall of the container in which it is located. One form of hydrostatic pressure is blood pressure, the force exerted by blood upon the walls of the blood vessels or the chambers of the heart. Blood pressure may be measured in capillaries and veins, as well as the vessels of the pulmonary circulation; however, the term blood pressure without any specific descriptors typically refers to systemic arterial blood pressure—that is, the pressure of blood flowing in the arteries of the systemic circulation. In clinical practice, this pressure is measured in mm Hg and is usually obtained using the brachial artery of the arm.
Components of Arterial Blood Pressure
Arterial blood pressure in the larger vessels consists of several distinct components (Figure): systolic and diastolic pressures, pulse pressure, and mean arterial pressure.
Systolic and Diastolic Pressures
When systemic arterial blood pressure is measured, it is recorded as a ratio of two numbers (e.g., 120/80 is a normal adult blood pressure), expressed as systolic pressure over diastolic pressure. The systolic pressure is the higher value (typically around 120 mm Hg) and reflects the arterial pressure resulting from the ejection of blood during ventricular contraction, or systole. The diastolic pressure is the lower value (usually about 80 mm Hg) and represents the arterial pressure of blood during ventricular relaxation, or diastole.
Systemic Blood Pressure
The graph shows the components of blood pressure throughout the blood vessels, including systolic, diastolic, mean arterial, and pulse pressures.
Pulse Pressure
As shown in Figure, the difference between the systolic pressure and the diastolic pressure is the pulse pressure. For example, an indivi ...
Knee anatomy and clinical tests 2024.pdfvimalpl1234
This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
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Overall life span (LS) was 1671.7±1721.6 days and cumulative 5YS reached 62.4%, 10 years – 50.4%, 20 years – 44.6%. 94 LCP lived more than 5 years without cancer (LS=2958.6±1723.6 days), 22 – more than 10 years (LS=5571±1841.8 days). 67 LCP died because of LC (LS=471.9±344 days). AT significantly improved 5YS (68% vs. 53.7%) (P=0.028 by log-rank test). Cox modeling displayed that 5YS of LCP significantly depended on: N0-N12, T3-4, blood cell circuit, cell ratio factors (ratio between cancer cells-CC and blood cells subpopulations), LC cell dynamics, recalcification time, heparin tolerance, prothrombin index, protein, AT, procedure type (P=0.000-0.031). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and N0-12 (rank=1), thrombocytes/CC (rank=2), segmented neutrophils/CC (3), eosinophils/CC (4), erythrocytes/CC (5), healthy cells/CC (6), lymphocytes/CC (7), stick neutrophils/CC (8), leucocytes/CC (9), monocytes/CC (10). Correct prediction of 5YS was 100% by neural networks computing (error=0.000; area under ROC curve=1.0).
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1. Mercury was used in the first accurate
pressure gauges and is still used in
medicine today as the standard unit of
measurement for pressure
BLOOD PRESSURE
Ms. Tinu Gloria Mathew
Bsc Nursing
3. Introduction
Normal blood pressure is vital to life.
Without the pressure that forces our blood
to flow around the circulatory system, no
oxygen or nutrients would be delivered
through our arteries to the tissues and
organs.
However, blood pressure can become
dangerously high, and it can also get too
low.
4. Definition
Blood Pressure is the force exerted by
the blood against the the walls of the the
blood vessels as it it flows through them.
5. Systolic blood pressure is force exerted
by arterial walls during systole. It is the maximum
pressure during ventricle contraction.
Terminology
6. Diastolic blood pressure is the force exerted
by blood against arterial wall during diastole. It
is the minimum pressure when the ventricles
are relaxed.
Unit of measuring blood pressure is (mmHg)
millimeters of mercury.
Normal blood pressure is 120/80 mmHg.
Pulse pressure is the difference between
systolic and the diastolic pressure.
Normally the pulse pressure is 40mmHg.
Pulse pressure= SBP - DBP = 40 mmHg (Normal)
7. BP = Cardiac output (CO)+ Peripheral
resistance
Cardiac output = Stroke volume x Heart rate.
Blood pressure has very close relationship with:-
cardiac output
peripheral vascular resistance
blood volume
viscosity
elasticity of arterial wall.
Cardiac output is the amount of blood ejected
by heart in one minute.
Stroke volume is the amount of blood ejected by
heart in one cycle.
8. Normally, heart eject 70-80 ml blood in
one cycle.
Cardiac output = Stroke volume x Heart
rate.
If client has 72 heart rate, then cardiac
output is 70x72 ml = 5040ml.
9. Peripheral vascular resistance : Peripheral vascular
resistance (systemic vascular resistance, SVR) is the
resistance in the circulatory system that is used to create
blood pressure, the flow of blood and is also a component
of cardiac function.
When blood vessels constrict (vasoconstriction) this
leads to an increase in SVR. When blood vessels dilate
(vasodilation), this leads to a decrease in SVR.
If referring to resistance within the pulmonary
vasculature, this is called pulmonary vascular resistance
(PVR)..
10. Blood volume: Volume of blood is present in the vascular system. As soon as blood
volume increases, pressure exerted against arterial wall also increases. That is why giving
intravenous fluid in hypotension increases the Blood Pressure. With haemmorhage /
bleeding, blood volume decreases and automatically BP falls.
Viscosity: Viscosity reflects the thickness of Blood. Greater the thickness (viscosity)
blood flows slowly, heart contracts more forcefully,
Elasticity: It is the ability of arterial wall to expand. Greater elasticity, greater ability of
artery to expand its diameter, less resistance, less Blood Pressure.
During disease condition athresclerosis/old age, the elasticity of blood vessel decreases,
wall becomes rigid, resistance to blood flow increases and Blood Pressure increases.
11. Factors Affecting Blood Pressure
1.Age: Blood Pressure varies throughout the
age. As age increases, BP also raises. Older
people, systolic pressure rises with decreased
elasticity.
Body size/obesity : It is observed that as the
body size increases, BP also fluctuates. Heavier
and taller child have higher BP than the smaller
child of same age.
2. Stress and severe emotions:- Anxiety, fear,
pain, stress, sympathetic nervous system get
activated, causing vasoconstriction, increases
heart contraction and ultimately raises Blood
Pressure.
Anxiety → ↑ SNS → ↑Heart rate → ↑Co
→↑Vasoconstriction resistance →↑ BP
12. 3. Gender wise After puberty, male have higher
blood pressure than females. But after
menopause, women tend to have high BP than male of
same age.
4. Ethnicity: African-Americans have higher incidence of
High Blood Pressure than Eurpeon-Americans.
5. Diet: People taking diet rich in salt and unsaturated
fatty acids, have higher Blood Pressure. Cocaine and
Caffeine use increases Blood Pressure.
13. 6. Smoking : raises Blood Pressure. Nicotine
increases BP.
7. Exercise : Regular exercise, decreases the
Blood Pressure. Helps in keeping BP normal.
8. Diurinal variations: Usually, person have low
BP in early morning and gradualy rises and peaks
in evening.
9. Medication : Medications such as opioids,
analgesics and antihypertensive drugs have
greater effect on BP.
14. 10. Chemicals : Such as epinephrine, Antidiuretic hormone (ADH), Angiotensin II causes
vasoconstriction, thus elevating BP. Histamine and bradykinin cause vasodilation, decrease
BP.
17. Procedure
Collect all articles. Save time and energy
Wash hands Minimizes cross infection
Explain procedure to client i.e. you are going to monitor
Blood Pressure
Enchances cooperation and develops rapport.
Provide comfortable position i.e. is sitting or supine
while keeping upper arm at heart level, palm up.
Avoid false reading if arm is elevated above the
heart level
Ensure that Mercury level of sphygmomanometer is at 0 To have accurate reading
18. Ensure cuff with against client’s arm Prevent false reading
Inappropriate cuff size causes inadequate
compression of artery
Ensure that Mercury meniscus is at your your eye
level.
Ensure accurate reading.
Palpate brachial artery pulse. Locate he artery
Ensure no air in the cuff and wrap it evenly around
the client’s arm centring arrow over branchial atery.
Ensure accurate reading..
Place lower edge of cuff about 1 inch above antique
antecubital fossa.
To ensure brachial site is not covered.
Tuck the the end of wrap under cuff.
Place earpiece of stethoscope in ears and diaphragm
on brachial artery.
Proper placement of stethoscope ensure optimal
sound perception.
19. Close valve of pressure bulb clockwise until tight. Prevents air leakage.
Rapidly inflate cuff to 30 mm Hg above palpated
systolic pressure.
Slowly release the the pressure bulb valve and allow
the Mercury to fall at rate of 2-3 mmHg.
Indicates systolic pressure.
Listen and watch the Mercury level drop.
Sound is heard, note the systolic pressure.
Continue to deflat the bulb and when sound
disappears, note the diastolic pressure.
Indicates diastolic pressure.
20. Listen for 10- 20 mmHg after the last sound and then
escape air quickly.
Remove cuff.
Inform client their BP reading as needed. Give respect to individual.
Record reading immediately. Ensure prompt and accurate documentation.
Replace all the articles. Wash hands. Minimise cross infection.
21. Terms
Hypertension: Elevated systolic pressure or diastolic pressure at least for 5
consecuave
visits. i.e. 140/190mmHg.
Hypotension: BP falls below normal limits of client. Generally, systolic pressure
falls
to 90mmHg or below.
Orthostatic Hypotension/ Postural Hypotension : Suddenly BP fall of
normol-tensive
client while rising to upright position.