RGUHS_NSG Lecture Notes - Lecture 1: Superior Vena Cava, Ductus Arteriosus, Ductus Venosus

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vineethamat

10 Apr 2023

School

Rajiv Gandhi University of Health Sciences - RGUHS

Department

Nursing

Course

RGUHS_NSG

Professor

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The purpose of these shunts is to bypass certain body parts--in particular, the lungs and liver--that are not fully developed while the fetus is still in the womb. The enriched blood flows through the umbilical cord to the liver and splits into three branches. The blood then reaches the inferior vena cava, a major vein connected to the heart. Most of this blood is sent through the ductus venosus, also a shunt that passes highly oxygenated blood through the liver to the inferior vena cava and then to the right atrium of the heart. A small amount of this blood goes directly to the liver to give it the oxygen and nutrients it needs: waste products from the fetal blood are transferred back across the placenta to the mother"s blood. Inside the fetal heart: blood enters the right atrium, the chamber on the upper right side of the heart.

Related Questions

How many calories in that fast-food meal? Ontario menu labelling legislation takes effect
Jan. 1
CBC News · Posted: Dec 29, 2016
Restaurant-goers in Ontario are going to notice a little extra something on some menus as of Jan.
1: calorie counts.
Legislation that comes into effect Sunday under the Healthy Menu Choices Act, 2015 requires
that all restaurants with 20 or more locations must clearly display the caloric information for any
food and drink items.
Not only will the information have to be on menus, but it will also need to be clearly displayed
on menu boards and even on restaurant apps. Hospitals, schools, daycares and correctional
institutions are exempt.
The Heart and Stroke Foundation supports the initiative, believing that providing people with
more information helps them make better choices.
"Menu labelling is one small thing that empowers parents and empowers Ontarians to take
control of the choices that they make when they're having lunch or dinner at a restaurant," said
Joe Belfontaine, executive director of the Ontario branch of the Heart and Stroke Foundation.
"Certainly it's not the end-all or be-all, but it's an important tool in the toolbox."
Although Ontario is the first province in the country to require nutritional labelling at restaurants,
Belfontaine said that he hopes other provinces will follow suit.
Will it make a difference?
Whether including caloric counts will have any lasting health benefits, however, is questionable.
New York City has had food labelling requirements at restaurants since 2008. Since then,
researchers have attempted to ascertain whether it's made a difference to the city's population.
Calories of each food item appear on a McDonald's drive-thru menu in New York City. The city
made it mandatory for restaurants to display nutritional information since 2008. (Associated
Press)
A 2012 study in the American Journal of Public Health concluded posting calories on foods had
no direct impact on what foods people chose to buy. Over time, it appeared that people simply
ignored the labelling altogether.
A more recent study from Tulane University suggested that the New York City mandate
"plausibly reduced the obesity rate by 2.5 percentage points."
Dr. Sean Wharton, an internal medicine specialist who also runs a weight management and
diabetes clinic in Toronto, believes that the move is a positive one by the government,
particularly for those who are paying close attention to their nutrition. However, it's likely a
different story for the general population.
"From an overall population level, I'm not so sure it'll have the big impact that we're actually
looking for," Wharton said.
"I don't think it's going to decrease weight from a population basis, but I think an informed
consumer is better at making choices and making judgements."
Wharton also noted that data supporting the idea of health benefits from such labelling is weak.
As well, he said, no studies have found that nutrition intake is any better in a general population
when such measures are undertaken.
While the evidence may be slim for a smaller waistline associated with menu labelling, experts
believe that it's important that people make informed decisions.
"I think it's important for consumers to have choice," Belfontaine said. "I think it's important for
consumers to have the right information."

Requiring restaurants to put calorie counts on menus is an example of which mechanism of policy

A. Exhortation
B. Expenditure
C. Taxation
D. Regulation
E. Public Ownership

Dr Wharton suggests that “an informed consumer is better at making choices and making judgements.” What ethical principle does this represent?

A. Autonomy
B. Non-maleficence
C. Beneficence
D. Justice

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RGUHS_NSG Lecture Notes - Lecture 1: Superior Vena Cava, Ductus Arteriosus, Ductus Venosus

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