The document describes the normal fetal circulation and changes that occur at birth. In the fetus, oxygenated blood is delivered to the placenta via the umbilical arteries and returns to the fetus via the umbilical vein. Three fetal shunts allow blood to bypass the lungs and liver. At birth, the lungs replace the placenta and the shunts close as pulmonary resistance decreases and pressure in the left heart increases.
Fetal Circulation by Barkha Devi,Lecturer,Sikkim Manipal College of NursingBarkha Devi
This PowerPoint will provide you a short a sweet lecture about fetal circulation. Please give me your feed back .
-Discuss anatomy and physiology of fetal circulation
-Compare and contrast fetal circulation to infant circulation
-Define specialized structures of fetal circulation
A brief description about the fetal circulation for BSc Nursing students. This PPT includes the slides aboute fetal circulation from the basic Anatomy and Physiology of Heart and Circulatory system till the Applied aspects of it.
Fetal Circulation by Barkha Devi,Lecturer,Sikkim Manipal College of NursingBarkha Devi
This PowerPoint will provide you a short a sweet lecture about fetal circulation. Please give me your feed back .
-Discuss anatomy and physiology of fetal circulation
-Compare and contrast fetal circulation to infant circulation
-Define specialized structures of fetal circulation
A brief description about the fetal circulation for BSc Nursing students. This PPT includes the slides aboute fetal circulation from the basic Anatomy and Physiology of Heart and Circulatory system till the Applied aspects of it.
Describe the normal fetal circulation and mention the changes that occur in it is placental stage and after birth. Fetal circulation is composed of placenta, umbilical cord, heart and systemic blood vessels.
A major difference between the fetal circulation and postnatal circulation is that the lungs are not used during the fetal stage resulting in the presence of shunts to move oxygenated blood and nutrients from the placenta to the fetal tissue.
At birth, the start of breathing and the severance of the umbilical cord prompt various changes that quickly transform fetal circulation into postnatal circulation.
When the embryo develops into the fetus, it creates a functional cardiovascular system that cooperates with the mother's system.
During birth, there are functional physiological changes that transform the shared system into an individual one for the fetus.
In the fetus main filtration site for plasma nutrients and wastes in the placenta, which is outside of the body cavity.
In adults, the circulation occurs entirely inside the body.
The blood that flow to through the fetus is actually more complicated than after the baby is born (normal heart).
This is because the mother (the placenta) is doing the work that the baby's lungs will do after birth.
The placenta accepts the blood without oxygen from the fetus through blood vessels that leave the fetus through the umbilical cord (Umbilical arteries , there are two of them).
When blood goes through the placenta it pick up oxygwn.
The oxygen rich blood then returns to the fetus via the third vessels in the umbilical cord (Umbilical vein).
The oxygen rich blood that enters the fetus passes through the fetal liver and enters the right side of the heart.
The oxygen rich blood goes through one of the two extra connections in the fetal heart that will close after the baby is born.
The hole between the top two heart chmbers (right and left atrium) is called "Patent Foramen Ovale (PFO).
This hole allows the oxygen rich blood to go form the right atrium to left atrium and then to the left ventricle and out the aorta.
As a result the blood with the most oxygen gets to the brain.
Blood coming back from the fetus's body also enters the right atrium, but the fetus is able to send this oxygen poor blood from the right atrium to the right ventricle (the chamber that normally pumps blood to the lungs).
most of the blood that leaves the right ventricle in the fetus bypass the lungs through the second of the extra fetal connections known as the ductus arteriosus.
The ductus arteriosus sends the oxygen poor blood to the organs in the lower half of the fetal body. This also allows for the oxygen poor blood to leave the fetus through the umbilical arteries and get back to the placenta to pick up oxygen.
Since the patent foramen ovale and ductus arteriosus are normal findings in the fetus, it is impossible to predict whether or not these connections will close normally after birth in a normal fetal heart.
USMLE CVS 008 Fetal and regional circulation anatomy .pdfAHMED ASHOUR
Fetal circulation and regional circulation refer to the distinct patterns of blood flow in the developing fetus and the circulatory pathways within different regions of the body.
Understanding these circulation patterns is crucial for comprehending the physiological adaptations that occur during fetal development and in the various regions of the body after birth.
After birth, the circulatory system undergoes significant changes, such as closure of the foramen ovale and ductus arteriosus, leading to the establishment of the adult circulatory pattern.
Describe the flow of oxygenated blood from the placenta to the fe.pdffasttrackscardecors
Describe the flow of oxygenated blood from the placenta to the fetus\' systemic circulation and
deoxygenated blood from the fetus to the placenta. Be sure to include all five structures that
allow for fetal circulation to take place effectively.
Solution
Placenta receives blood from two systems: a uteroplacental system that delivers maternal blood
to the placenta; and the fetoplacental system that receives from the fetus.
The umbilical vein carries blood from the placenta to the fetus. A majority of it enters liver and
1/3rd is diverted to ductus venosus and carried to inferior vena cava. In liver proper, the blood
enters from its inferior border. A branch of the umbilical vein joins the portal vein. The blood is
then supplied to the right atrium of the heart. The heart has an opening connecting left and right
atrium called foramen ovale. Due to this opening, the blood bypasses the pulmonary circulation
and is directly circulated to the body of the fetus, via the aorta. Some of the blood moves to the
placenta through iliac and then umbilical arteries into the mother\'s blood circulation for the
exchange of gasses and removal of waste products.
A part of the blood that enters the atrium of the fetus enters left ventricle and is pumped to the
pulmonary artery The pulmonary artery of the fetus is connected to the aorta via ductus atriosus
and thus the blood enters aorta and escapes from entering the lungs. The blood in aorta takes the
same route as described earlier..
Embryology of heart, Anatomy of heart, Physiology of heart, Fetal circulation, Neonatal circulation, Congenital cyanotic and acyanotic heart diseases of children.
This is a presentation I had made for giving a seminar on Fetal Circulation in the first year of my MBBS course in Maharashtra.
Please share it with your juniors and colleagues.Thank You
Presentation By Tashif Jilani
Describe the normal fetal circulation and mention the changes that occur in it is placental stage and after birth. Fetal circulation is composed of placenta, umbilical cord, heart and systemic blood vessels.
A major difference between the fetal circulation and postnatal circulation is that the lungs are not used during the fetal stage resulting in the presence of shunts to move oxygenated blood and nutrients from the placenta to the fetal tissue.
At birth, the start of breathing and the severance of the umbilical cord prompt various changes that quickly transform fetal circulation into postnatal circulation.
When the embryo develops into the fetus, it creates a functional cardiovascular system that cooperates with the mother's system.
During birth, there are functional physiological changes that transform the shared system into an individual one for the fetus.
In the fetus main filtration site for plasma nutrients and wastes in the placenta, which is outside of the body cavity.
In adults, the circulation occurs entirely inside the body.
The blood that flow to through the fetus is actually more complicated than after the baby is born (normal heart).
This is because the mother (the placenta) is doing the work that the baby's lungs will do after birth.
The placenta accepts the blood without oxygen from the fetus through blood vessels that leave the fetus through the umbilical cord (Umbilical arteries , there are two of them).
When blood goes through the placenta it pick up oxygwn.
The oxygen rich blood then returns to the fetus via the third vessels in the umbilical cord (Umbilical vein).
The oxygen rich blood that enters the fetus passes through the fetal liver and enters the right side of the heart.
The oxygen rich blood goes through one of the two extra connections in the fetal heart that will close after the baby is born.
The hole between the top two heart chmbers (right and left atrium) is called "Patent Foramen Ovale (PFO).
This hole allows the oxygen rich blood to go form the right atrium to left atrium and then to the left ventricle and out the aorta.
As a result the blood with the most oxygen gets to the brain.
Blood coming back from the fetus's body also enters the right atrium, but the fetus is able to send this oxygen poor blood from the right atrium to the right ventricle (the chamber that normally pumps blood to the lungs).
most of the blood that leaves the right ventricle in the fetus bypass the lungs through the second of the extra fetal connections known as the ductus arteriosus.
The ductus arteriosus sends the oxygen poor blood to the organs in the lower half of the fetal body. This also allows for the oxygen poor blood to leave the fetus through the umbilical arteries and get back to the placenta to pick up oxygen.
Since the patent foramen ovale and ductus arteriosus are normal findings in the fetus, it is impossible to predict whether or not these connections will close normally after birth in a normal fetal heart.
USMLE CVS 008 Fetal and regional circulation anatomy .pdfAHMED ASHOUR
Fetal circulation and regional circulation refer to the distinct patterns of blood flow in the developing fetus and the circulatory pathways within different regions of the body.
Understanding these circulation patterns is crucial for comprehending the physiological adaptations that occur during fetal development and in the various regions of the body after birth.
After birth, the circulatory system undergoes significant changes, such as closure of the foramen ovale and ductus arteriosus, leading to the establishment of the adult circulatory pattern.
Describe the flow of oxygenated blood from the placenta to the fe.pdffasttrackscardecors
Describe the flow of oxygenated blood from the placenta to the fetus\' systemic circulation and
deoxygenated blood from the fetus to the placenta. Be sure to include all five structures that
allow for fetal circulation to take place effectively.
Solution
Placenta receives blood from two systems: a uteroplacental system that delivers maternal blood
to the placenta; and the fetoplacental system that receives from the fetus.
The umbilical vein carries blood from the placenta to the fetus. A majority of it enters liver and
1/3rd is diverted to ductus venosus and carried to inferior vena cava. In liver proper, the blood
enters from its inferior border. A branch of the umbilical vein joins the portal vein. The blood is
then supplied to the right atrium of the heart. The heart has an opening connecting left and right
atrium called foramen ovale. Due to this opening, the blood bypasses the pulmonary circulation
and is directly circulated to the body of the fetus, via the aorta. Some of the blood moves to the
placenta through iliac and then umbilical arteries into the mother\'s blood circulation for the
exchange of gasses and removal of waste products.
A part of the blood that enters the atrium of the fetus enters left ventricle and is pumped to the
pulmonary artery The pulmonary artery of the fetus is connected to the aorta via ductus atriosus
and thus the blood enters aorta and escapes from entering the lungs. The blood in aorta takes the
same route as described earlier..
Embryology of heart, Anatomy of heart, Physiology of heart, Fetal circulation, Neonatal circulation, Congenital cyanotic and acyanotic heart diseases of children.
This is a presentation I had made for giving a seminar on Fetal Circulation in the first year of my MBBS course in Maharashtra.
Please share it with your juniors and colleagues.Thank You
Presentation By Tashif Jilani
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
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These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
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MANAGEMENT OF ATRIOVENTRICULAR CONDUCTION BLOCK.pdfJim Jacob Roy
Cardiac conduction defects can occur due to various causes.
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This document describes the acute management of AV block.
These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Ve...kevinkariuki227
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
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Flu Vaccine Alert in Bangalore Karnatakaaddon Scans
As flu season approaches, health officials in Bangalore, Karnataka, are urging residents to get their flu vaccinations. The seasonal flu, while common, can lead to severe health complications, particularly for vulnerable populations such as young children, the elderly, and those with underlying health conditions.
Dr. Vidisha Kumari, a leading epidemiologist in Bangalore, emphasizes the importance of getting vaccinated. "The flu vaccine is our best defense against the influenza virus. It not only protects individuals but also helps prevent the spread of the virus in our communities," he says.
This year, the flu season is expected to coincide with a potential increase in other respiratory illnesses. The Karnataka Health Department has launched an awareness campaign highlighting the significance of flu vaccinations. They have set up multiple vaccination centers across Bangalore, making it convenient for residents to receive their shots.
To encourage widespread vaccination, the government is also collaborating with local schools, workplaces, and community centers to facilitate vaccination drives. Special attention is being given to ensuring that the vaccine is accessible to all, including marginalized communities who may have limited access to healthcare.
Residents are reminded that the flu vaccine is safe and effective. Common side effects are mild and may include soreness at the injection site, mild fever, or muscle aches. These side effects are generally short-lived and far less severe than the flu itself.
Healthcare providers are also stressing the importance of continuing COVID-19 precautions. Wearing masks, practicing good hand hygiene, and maintaining social distancing are still crucial, especially in crowded places.
Protect yourself and your loved ones by getting vaccinated. Together, we can help keep Bangalore healthy and safe this flu season. For more information on vaccination centers and schedules, residents can visit the Karnataka Health Department’s official website or follow their social media pages.
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6. OBJECTIVE:
• Describe the normal foetal
circulation and mention the
changes that occur in it at placental
stage and after birth.
7. •The Foetus:
It is the term used to refer to a prenatal mammal between it’s
embryonic state and it’s birth.
•The Placenta:
The organ in human mother responsible for the supplying of
oxygen and nutritive material to the fetus and for the elimination of CO2
and nitrogenous waste out of the fetus.
8. •The Umiblical Cord:
A flexible cord-like structure containing blood vessels and
attaching a human to the placenta responsible for the supplying and
elimination of CO2 and O2.
9. •Foetal Circulation:
The circulation of oxygenated
blood, de-oxygenated blood,
nutritive material etc in the foetus
is termed as foetal circulation.
10. •Placental Role in Foetal Circulation:
The circulatory system of the mother is not directly connected to that
of the fetus, so the placenta functions as the respiratory center for the
fetus as well as a site of filtration for plasma nutrients and wastes.
•Foetal Lungs:
Pulmonary vascular resistance is the resistance offered to blood
through lungs. The resistance is very high in fetus because of the
non-functioning of fetal lungs. Because of this high pressure, the
blood is diverted from pulmonary artery into aorta.
11. •Blood Vessels In
Foetus:
The blood vessels responsible for
foetal circulation are:
1. Umblical Vein.
2. Umblical Artery.
12. 1. Umblical Vein:
It carries the oxygenated blood
from the placenta to the growing
fetus.
The blood pressure inside the
umbilical vein is approximately
20 mmHg.
13. 2. Umblical Artery:
It is a paired artery that is found in the pelvic and abdominal region
of the fetus which extends into the umblical cord.
Supplies de-oxygenated blood from the fetus to the placenta.
They surround the urinary bladder and then carry all the
de-oxygenated blood out of the fetus.
14. •Shunts Involved In Foetal
Circulation:
There are three shunts present in a fetus, they are:
1. Ductus Venosus.
2. Ductus Arteriosus.
3. Foramen Ovale.
15. 1. Ductus Venosus:
The Ductus Venosus shunts the portion of left umblical vein blood
flow directly to the inferior vena cava.
Allows oxygenated blood from the placenta to bypass the liver.
2. Ductus Arteriosus:
Also called Ductus Botalli.
Connects the pulmonary artery to the proximal descending aorta.
It allows most of the blood from the right-ventricle to bypass the
fetus’ fluid-filled non-functioning lungs.
16.
17. 3. Foramen Ovale:
It is an opening in the intra-atrial septum.
It allows the blood to enter the left atrium from the right atrium
It is also called False Septi.
18. Steps Of Foetal Circulation:
Step.1:
The placenta accepts the bluest blood (blood without oxygen) from
the fetus through blood vessels that leave the fetus through the Umbilical
Cord (Umblical Arteries).
Step.2:
When blood goes through the placenta it picks up oxygen and
becomes Red.
19.
20. Step.3:
The red blood then returns to the fetus via the umbilical cord
(umbilical vein).
Step.4:
The red blood that enters the fetus passes through the fetal liver
and enters the right side of the heart.
Step.5:
Foramen Ovale allows the reddest blood to go from the right
atrium to left atrium and then to the left ventricle and out the aorta. As a
result the blood with the most oxygen gets to the brain.
21.
22. Step.6:
۞
۞
Blood coming back from the fetus’s body also enters the right
atrium, but the fetus is able to send this blue blood from the right
atrium to the right ventricle (the chamber that normally pumps
blood to the lungs).
Most of the blood that leaves the right ventricle in the fetus
bypasses the lungs through the second of the two extra fetal
connections known as the ductus arteriosus.
23.
24. Step.7:
۞
۞
The ductus arteriosus sends the bluer blood to the organs in the
lower half of the fetal body.
This also allows for the bluest blood to leave the fetus through the
umbilical arteries and get back to the placenta to pick up oxygen.
25.
26. •The Circulatory Changes
After Birth:
Ѡ
Ѡ
Ѡ
Ѡ
Ѡ
The Placenta is replaced by the Lungs as the organ of
respiratory exchange.
The lungs and pulmonary vessels expand thereby significantly
lowering the resistance to blood flow.
Subsequently the pressure in the pulmonary artery and the right
side of the heart is decreased.
The pressure of the left side of the heart increases
The increasing pressure of blood in the left side of the heart
decreases the vascular resistance of the lungs, therefore, the
blood now enters the lungs as a respiratory exchange.
27. • What happens to the shunts
at birth?
Ѡ Closure of the Ductus Venosus.
Ѡ Closure of the Foramen Ovale.
Ѡ Closure of the Ductus Arteriosus.
28. Ѡ Closure of the Ductus Venosus:
1. Functional closure occurs within minutes of birth.
2. Structural closure occurs within 3 to 7 days.
3. After it closes, the remnant is known as ligamentum venosum.
4. Closure of ductus venosus is caused by strong contraction of muscle wall
of ductus venosus, but the cause of this contraction is not revealed yet.
29. Ѡ Closure of the Ductus Arteriosus:
1. Closure of ductus arteriosus is by smooth muscle contraction.
2. It is further replaced by fibrous tissue, called ligamentum arteriosum.
3. At birth, opposite direction of blood flow from aorta to pulmonary artery
supplies more oxyginated blood than before.
4. This contraction of smooth muscle occurs becuase of the increase in
availability of oxygen.
5. The degree of smooth muscle contraction is highly dependant on more
availability of oxygen.
30. Ѡ Closure of the Foramen Ovale:
1. Before birth the foramen ovale allows most of the oxygenated blood
entering the right atrium from the Inferior Vena Cava to pass into the left
atrium.
2. Closes at birth due to decreased flow from placenta and Inferior Vena
Cava to hold open foramen.
3. More importantly because of increased pulmonary blood flow and
pulmonary venous return to left heart causing the pressure in the left
atrium to be higher than in the right atrium.
4. The increased left atrial pressure then closes the foramen ovale against
the septum secundum (between right and left atrium).
5. The output from the right ventricle now flows entirely into the pulmonary
circulation.
31.
32.
33.
34. ‽ The Umblical arteries carry
Deoxygenated blood.
‽ The Umblical veins carry Oxygenated
Blood.
‽ When placental blood flow is cut off,
there is sudden hypoxia(deficiency of
oxygen) and hypercapnia(elevation of
CO2).
35. ‽ Oxygen in fetal circulation is
15-20 mmHg.
‽ Oxygen after birth increases to
100 mmHg.
‽ The right Ventricular wall is thicker in
foetal circulation.
‽ The Left Ventricular wall gets thicker by
the end of the first month after birth.