Arteries and Veins

Arteries and Veins-Aorta

In today's newsletter, we're going to talk about the vascular principles -- your arteries and veins. Unlike our discussion of the heart, which required a great deal of anatomy, our discussion of anatomy today will be much simpler. As I've stated previously, my goal in this series is not to make you doctors, but to help you understand adequate about your body's systems and how they work so that you can report with your doctor and actively share in your treatment. If you have high blood pressure, blood clots, or atherosclerosis, it's imperative that you fully understand how that happened, the physiological consequences of any healing treatments, and any viable alternatives that might be ready to you.

Aorta

That's what we will cover today.

Circulatory Systems

As we discussed previously, you have any safe bet circulatory systems.

The pulmonary principles that carries deoxygenated blood away from the heart to the lungs, and then returns the refreshed oxygenated blood back to the heart.

The systemic principles that carries the oxygenated blood away from the heart out to every single cell in your body, and then returns the spent deoxygenated blood back to the heart so that it can be sent out through the pulmonary system.

There is surely a third system, the portal system, which loops within safe bet organs or areas of the body that we will discuss in future newsletters.

The important thing to understand about these circulatory systems is that they are "closed looped." Unless there is injury, no blood leaves them. As you will see, even the nourishment that every single cell in your body receives from your blood happens without that blood ever leaving the ended system. This becomes key when we talk about blood pressure.

The circulatory systems are comprised of:

- Arteries.

- Arterioles.

- Capillaries.

- Veins.

All told, these four components make up some 50,000 miles of passageways in the body. Let's take a look at them in more detail.

Arterial system

Arteries, arterioles, and capillaries make up the arterial system. Arteries and arterioles have only one function--to move blood throughout the body. That's all they do. They are channels, tubes, pipes if you will. As long as they are unclogged, flexible, and undamaged, they do their job. The primary difference in the middle of arteries and arterioles is one of size. Arterioles are just the smallest arteries you can see with the naked eye. Again, arteries and arterioles have only one function, to move blood. They do not feed any cells of the body--not even their own. That's surely a fun small bit of trivia. The arteries of your body are not fed by the blood that flows through them. They need their own network of blood vessels called the vasa vasorum (literally, vessels of a vessel) that feed them -- from the outside!

As I mentioned, I'm not going to get into naming all of the arteries in the body; but for the most part, arteries take their names from whether the organs they furnish (e.g.., the hepatic artery, which feeds the liver) or the areas through which they voyage (e.g., the subclavian artery, which travels under the clavicle--Aka, the collar bone).

Capillaries

Capillaries are quite dissimilar in function. They are not designed to shuttle blood. In fact, blood hardly flows through them at all as they are so small they allow only one blood cell at a time to pass through. Instead, the capillaries are the end point of the arterial system. It is in the capillaries that food and oxygen are exchanged with every cell in your body (except your cornea and the lens of your eye). Amazingly, of the 50,000 miles of circulation in the body, capillaries consist of over 49,000 miles.

Unlike the arteries, capillaries are imperceptible to the naked eye. They are smaller than a human hair--microscopic. And it is because they are so small and their walls are so thin, that capillaries serve as the replacement principles for food and oxygen in the body. Keep in mind that every single cell in the body (except the cornea and lens) is near a capillary. That means that as blood passes through the ultra thin capillaries, it is easy for oxygen and tiny sugar and protein molecules (the end products of digestion) to "exchange" through the walls of the vessel and feed every single cell in the body.

Capillaries also serve as the connecting point in the middle of the arterial principles and venous principles that returns deoxygenated blood to the heart. The same replacement principles that works to feed the cells of the body works in reverse. Cells pass their waste such as carbon dioxide back through the walls of the capillaries, where the blood cells recently relieved of their oxygen payload, can now pick up the Co2 waste from the cell and carry it back to the lungs for replacement with fresh oxygen.

Surprisingly, there's more "space" inside the tiny capillaries than can be filled by your entire blood supply. If all your capillaries were "open" simultaneously, your blood pressure would drop precipitously, and you would die. What happens, though, is that your body intelligently shunts blood into dissimilar capillaries as needed. When functioning properly, this is a pressure regulating mechanism. The body can open more capillaries to lower pressure, and close off sections if needed to raise pressure.

Note: our bodies withhold the ability to sprout new capillaries throughout our entire lives.

Venous System

The venous principles returns deoxygenated blood to the heart, and for the most part, it pretty much parallels the arterial principles in all aspects--just in reverse. Whereas the arteries start out large (the aorta) and end small (the capillaries), the venous principles starts small (the capillaries) and ends large (the vena cava). Veins tend to run right next to their corresponding arteries, and in fact have similar names. The subclavian vein, for example, runs in tandem with the subclavian artery under your collar bone. The primary irregularity is the vena cava, which is the aorta's counterpart.

How arteries and veins are constructed

In this section, we start studying how problems occur. For it is their dissimilar construction (dictated by their dissimilar functions) that defines the nature of the things that can go wrong such as hardening of the arteries, high blood pressure, and blood clots.

Arteries

Arterial walls are composed of elastic tissue and smooth muscle. It is their elastic nature and the nearnessy of large muscle tissue that allows them to enlarge and compact as the heart beats. This allows them to even out the increase in pressure caused by each beat. This is one of the primary reasons why hardening of the arteries (atherosclerosis) increases blood pressure. If you pump more fluid through the same sized tube, pressure must increase. On the other hand, if the tube is flexible and can widen, the increase is less. (We will talk more about this later.)

Veins

Veins are thinner walled than arteries and have less elastic tissue, and much, much less smooth muscle tissue. Instead, veins make use of valves and the muscle contraction of your body's major skeletal muscles to squeeze blood along. This is the presume you're asked to get up and walk nearby on a long plane flight--to forestall blood from pooling in your legs. As a side note, the lack of muscle in the walls of veins makes them more susceptible to bleeding when injured since there's no muscle to clamp down.

Problems that can occur in arteries

There isn't much mystery as to what the qoute is--the build up of arterial plaque on the walls of the arteries and arterioles. There is, however, a great deal of mystery as to what causes it.

The basic qoute is that arterial plaque (a mixture of protein, calcium and cholesterol) starts construction up on the walls of the arteries. This causes the arteries to both preserve and narrow. So far so good! But what causes that buildup?

The cholesterol theory

The primary principles lays the blame on cholesterol--that as cholesterol levels climb in the blood, this causes plaque to form on the walls of the arteries. But this principles begins to collapse under even the most elementary scrutiny. As I mentioned in my newsletter, the Cholesterol Myth, one of my favorite questions to ask doctors is, "If cholesterol is the main culprit in heart disease, why don't veins ever get narrowed and blocked?" And if you wanted to, you could throw capillaries into the equation too. Capillaries do not evidence the build up of arterial plaque. (They do, however, clog with amyloid plaque in the brain. But that's a dissimilar qoute that we'll cover in a later newsletter.)

Think about this for a moment. If you have cholesterol circulating equally through the entire circulatory system, but it only causes plaque to build up in the arteries and arterioles, not the capillaries or veins, then how can cholesterol be the primary cause of the problem? If cholesterol caused plaque to form, wouldn't it form everywhere? Since it only forms in the arteries, doesn't the qoute have to be something unique to those arteries?

The arterial wall theory

A more sophisticated version of the principles says that the build up of plaque is triggered by damage to the arterial wall--the endothelial lining. The lining consists of a thin layer of endothelial cells that performs two indispensable functions:

- It protects the "innards" of the artery from toxic substances in the blood.

- It helps regulate the expansion and contraction of the arteries by releasing a bio-chemical (cyclic Gmp) into the cells of the smooth muscle in the arterial wall that turn the tone or firmness of the artery.

- In an effort to repair damage to the endothelium, your body will "patch" the damage with plaque.

- This produces one of two conditions--two sides of the same coin really.

Artherosclerosis (hardening of the arteries)

Damage to the endothelial lining is "managed" by the smooth muscle cells surrounding the lining. smooth muscle cells retort to endothelial injury by rapidly multiplying and producing a fibrin/calcium/cholesterol patch. These patches, called plaques occur just inside the lining and thicken the artery's inner wall. Over time, given multiple injuries, the wall of the artery begins to preserve and come to be dysfunctional, no longer expanding and contracting to regulate blood pressure --and steadily narrowing the passageway through which blood flows.

Arteriosclerosis (plaque build up)

Another way of describing this process is that your body creates plaque to "paste over" any damaged areas--like a scab over a cut. Over time, given repeated injury, these plaques intrude more and more on the inner passage of the artery steadily compromising the ability of the artery to enlarge and compact and for blood to flow freely.

But it gets worse

The damage to the arterial wall also triggers an immune response with white blood cells flooding the area. This leads to a lasting inflammatory response in the blood vessel. Continued inflammation causes even more damage, which accelerates the process.

All of this, of course, brings up the ,000 question: "Since the entire principles hinges on damage to the endothelial lining, what surely causes the damage to the lining, and why doesn't it happen to the lining of the veins?"

Once again, oxidized fats and Ldl cholesterol are named as the key culprits. Other suspected culprits include:

- Free radicals.

- High blood pressure (yes, high blood pressure begets more high blood pressure).

- Diabetes.

- High homocysteine levels.

- High C-Reactive Protein levels.

- Low levels of vitamin C (similar to scurvy).

- Low levels of nitric oxide.

- Heavy metals.

- Aging.

- Muscle matters

But once again, the question arises: "Are not all of these things gift in the capillaries and veins too?" The answer, of course, is yes they are--which means there's still a missing piece in the equation. The answer, agreeing to the pH theory, lies not in what flows through the arteries and veins (which is identical), but in their construction (which is different). The key difference in the middle of arteries and veins is in the number of muscle tissue surrounding the endothelial lining. In arteries and arterioles, the smooth muscle is extensive. In veins, it is minimal. And in capillaries, it is totally absent. Why does this matter?

It matters because when muscle tissue is used it produces lactic acid. If your body is healthy (in an alkaline state) and has ready access to an abundant source of oxygen rich blood, that lactic acid can clear quickly. But for those people who eat a high acid forming diet and are in an acidic state, the lactic acid cannot clear quickly. (Remember, blood vessels do not have direct access to the oxygen in the blood that flows through them. They are dependent on the vasa vasorum.) It is the lactic acid that provides the final trigger that causes damage to occur in arterial linings, but not so in veins. It is the nearnessy of accumulated lactic acid in the smooth muscles surrounding arteries that ultimately causes plaques to form.

But even beyond lactic acid, there's another area where muscle tissue matters: nitric oxide. The contraction of the muscles in the arterial walls is regulated by a signaling molecule that we referred to earlier called cyclic guanosine monophosphate (cyclic Gmp) in the muscle cells. Cyclic Gmp causes the arterial muscle to relax, in preparation for its next contraction. Cyclic Gmp is triggered by nitric oxide, which is produced in the endothelial lining. The ability of the lining to fabricate adequate nitric oxide to voice artery dilation is one of its most crucial functions. As damage continues to build in the lining, it blocks nitric oxide-induced dilation, thus stiffening the arteries.

High Blood Pressure

If the arterial blockages happen in your coronary arteries, the result, as we've discussed previously, is coronary heart disease and a heart attack. If it happens in the carotid arteries important to the brain, it can cause a stroke.

In most cases, however, the damage happens systemically, throughout your arterial system, and the follow is high blood pressure. As a quick review, blood pressure is a determination of the two pressures in your circulatory principles as your heart beats. The increased pressure produced in your circulatory principles by the contraction of the left ventricle is referred to as systolic pressure. The reduced pressure during leisure is called diastolic pressure. These are the two numbers your doctor gives you when reading your blood pressure (e.g., 120 over 70). Both low and high blood pressure are dangerous, but low blood pressure is normally easier to manage. High blood pressure, on the other hand, tends to be more intractable and harder to manage--and therefore more dangerous.

Your body has many mechanisms for controlling blood pressure.

- It can turn the number of blood the heart pumps.

- It can turn the diameter of arteries, and the volume of blood in the bloodstream.

- To increase blood pressure, it can pump more blood by pumping more forcefully or more rapidly.

- It can also increase pressure by narrowing arteries (particularly the arterioles), forcing the blood from each heartbeat through a narrower space than normal.

- It can seal off capillaries forcing the blood into a smaller space, thereby expanding pressure.

- The body can add fluid to the bloodstream (regulated by the kidneys) to increase blood volume and thus increase blood pressure.

- And it can remove fluid from the blood (also regulated by the kidneys), thereby decreasing pressure.

All of these things happen automatically, regulated by a healthy body, without your even mental about it. In addition, blood-pressure measurements can vary throughout the day, affected by all things from:

- Food.

- Alcohol.

- Caffeine.

- Smoking.

- Stress.

- Climate.

- And the time of day.

Blood pressure changes that occur plainly during the day are the follow of the body's internal (circadian) rhythms. In most people, blood pressure rises rapidly in the early morning hours, in prospect of rising and beginning the day. This is not the follow of the physical act of rising but is a preset principles that automatically increases a person's blood pressure at that time. Likewise, pressure normally starts dropping early in the evening in prospect of going to sleep.

All of these things mentioned so far, have nothing to do with clinical hypertension unless they follow in secondary damage such as can be caused by smoking and alcohol or sustained stress. Clinical hypertension is a lasting and hazardous condition caused by:

- Constricted arteries.

- Hardened arteries.

- Malfunctioning kidneys (which we'll talk about in a subsequent newsletter).

If left untreated, lasting hypertension can cause:

- Damage to the heart muscle because of the extra load it puts on the heart.

- Strokes.

- Kidney damage--which leads to more hypertension, which leads to more kidney damage, etc.

And ultimately, it kills you.

Problems that can occur in veins

As we've already discussed, veins do not have a large number of muscle tissue to compact and squeeze blood along. That means that without physical operation to cause the skeletal muscles to squeeze the veins:

- Blood has a tendency to pool and stop flowing in veins--particularly in the legs where gravity works against you.

- Blood that isn't flowing tends to clot.

- Clots tend to propagate more clotting nearby the primary clot.

- Cumulatively, this can form very large clots.

- Large clots that stay in place and block the flow of blood cause phlebitis.

If the clot breaks free and starts traveling through the circulatory system, it's called a thrombus. At whatever point it lodges in a blood vessel and blocks it, it's called an embolism. If you think back to our discussion of the venous system, you'll remember that veins get steadily bigger as blood moves back to the heart. That means that clots that break free in the legs are unlikely to be stopped anywhere on their way back to the heart. The first place they are likely to lodge is when the right ventricle of the heart pumps them out into the pulmonary circulatory principles on the way to the lungs. If the clot is fairly small, it will lodge in the lung itself and block the flow of blood to a section of the lung, killing it. This is called a pulmonary embolism. Larger clots can surely lodge in the pulmonary artery feeding an entire lung...killing the lung just like that. Or the clot can lodge at the juncture where the pulmonary artery divides in the middle of the two lungs, which will kill both lungs simultaneously...in an instant.

Dvt, or deep vein thrombosis, is the term now generally linked with clots that form as the follow of Continued sitting on an airplane. They tend to break free the next time you start intriguing again with any vigor. This can be any days or weeks after the plane flight itself, which means many people never connect the two events.

There is one other celebrated place that clots tend to form. As a follow of low blood flow or damaged valves, clots can form in the left atrium of the heart. If the clot forms there, it's already past the pulmonary circulatory principles so it can't affect the lungs. Unfortunately, the next stop for the clot is out into the systemic circulatory system, where it has a good chance of being pushed up into the brain causing a stroke.

What doctors do about these problems

Medical treatments for vascular problems never address the actual causes, but seek instead to force test results back into line. What is your doctor likely to offer?

Clogged arteries

Modern treatment surely only has two approaches.

1. Surgically repair the damaged area (bypasses and angioplasties).

2. Use drugs to enhance the flow of blood through the damaged area and minimize the yield of cholesterol, which serves as one of the triggers.

Neither of these approaches, of course, surely deals with the real problem.

High blood pressure

When it comes to high blood pressure, doctors rely roughly exclusively on pharmaceutical drugs. The four major classes of drugs are:

1. Diuretics, which reduce pressure by making you pee out water from your body. reduce the volume of fluid in your blood, and you reduce the pressure. Unfortunately, side effects can consist of dizziness, weakness, an increased risk of strokes, and impotence. (Not to worry, there are medications to alleviate the side effects.)

2. Calcium channel blockers, which work to relax and widen the arteries--thus reducing blood pressure. Then again, a major side follow of channel blockers is a 60% increased risk of heart attack.

3. Beta blockers, which work by weakening the heart so it won't pump as strongly, thereby reducing blood pressure. One of the major problems with beta blockers, though, is the increased risk of congestive heart failure.

4. Ace inhibitors (the new drugs of choice), which like the calcium channel blockers, also work to relax and widen the arteries. Unfortunately, Ace inhibitors can furnish severe allergic reactions, can be deadly to fetuses and children who are breastfeeding, and can cause severe kidney damage.
Again, none of these drugs deals with the actual cause of the high blood pressure. They are merely an effort to force test numbers into line and forestall people from immediately dying.

Blood clots and Dvt

If doctors are worried about clots (such as after bypass surgery), they put patients on blood thinners. The thorough is Coumadin (warfarin). Aside from the usual jokes that Coumadin is essentially rat poison (which it is), it has serious side effects. It can cause severe internal bleeding that can be life-threatening and even cause death. You can always tell a man on warfarin by the uncut bruising all over their body since even the slightest bump or touch is adequate to cause internal bleeding. It's a bit like using dynamite to open a locked door. It can do the job, but you need to be oh so meticulous or you'll blow up the construction at the same time. There are good choices.

Note: some people might think aspirin is a good alternative. It's not. While aspirin may be useful at holding blood flowing through arteries, studies indicate it has no follow on preventing clots from forming in veins.

What are the options?

As it turns out, for most major heart problems, you have a world of alternatives--certainly safer and often far more efficient than their healing counterparts.

Clogged arteries

- Studies have shown that dietary changes alone can unplug arteries.

- Proteolytic enzymes, particularly formulas that consist of whether nattokinase or lumbrokinase, can break down the proteins that hold plaque together stuck to arterial walls--effectively dissolving it.
Proteolytic enzymes can also help dissolve scarring of the endothelial lining.
And proteolytic formulas that consist of seaprose-s, serrapeptase, and/or endonase can help reduce arterial inflammation that both constricts arteries in real time and contributes to future long term damage.

- adequate Omega-3 fatty acids in the diet also help reduce arterial inflammation and dramatically reduce the circulating levels of damaging Nefas.

- Antioxidants such as Sod, pomegranate, grape seed excerpt (Aka Opcs), and pycnogenol help heal the endothelial lining, thereby preventing future plaque and helping to heal current plaque.

- Methylating supplements such as B6, folic acid, B12, Tmg, and Same help reduce homocysteine levels, thereby reducing damage to the endothelial lining.

- L-arginine and noni excerpt assist the smooth muscle in arterial walls in obtaining adequate nitric oxide to function properly.

- regular heavy metal detoxing can reduce a major cause of irritation to the endothelial lining and a primary instigator of plaque formation.

- And raising body pH through proper diet and the use of supplements such as coral calcium reduces lactic acid levels in the arterial smooth muscle, thereby minimizing damage to arterial linings.

As you can see, there is a world of choices you can make that can dramatically turn your vascular outcomes. Virtually all of them are covered if you're following the Baseline of condition Program.

High blood pressure

Pretty much all things you do to reduce clogging of the arteries will, by definition, help to reduce blood pressure. In addition, though, you can also consider:

Lose weight. Easy laws of physics apply here. As we've already discussed, your blood vessels have to assistance every single cell in your body. The more body mass you have, the more pressure you need to force blood through the system. Lose weight; less pressure required.

If you smoke, stop. Smoking constricts blood vessels and raises pressure.

If you're stressed, try meditation or biofeedback. As part of your body's "flight and fight" mechanisms, stress increases heart rate and blood pressure to help retort to the short term stress of an attack from a saber toothed tiger. Twenty-four/seven stress was not designed into the system. Continued stress assuredly impacts blood pressure levels. Even if you have clogged arteries, reducing stress levels can still help drop your blood pressure levels significantly.

Herbs such as passionflower, apocynum venetum, hawthorne, and stevia (yes stevia) have all been shown in clinical studies to help lower blood pressure.

Blood clots and Dvt

Proteolytic enzymes, particularly formulas that consist of whether nattokinase or lumbrokinase are just as efficient at preventing clots, with wide ranging dosage tolerances. In other words, good proteolytic formulas work with minimal chance of side effects. In fact, a good systemic proteolytic enzyme method that also contains enzymes such as endonase, seaprose-s, or serrapeptase can have multiple useful effects for the circulatory principles in expanding to reducing clotting. Such formulas can play a major role in reducing inflammation and scarring in the cardiovascular principles and enhance cardio perfomance in athletes.

Conclusion

When it comes to most forms of heart disease linked with the arteries and veins, you have a world of alternatives--certainly safer and often far more efficient than their healing counterparts. It's also worth noting again that if you are following the Baseline of condition Program, then you're already doing most of them.

Which brings us to the final part of our series on the anatomy, physiology, and diseases of the cardiovascular system--your blood. In the next issue will take on this most involved of subjects.

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Purpose of Art

Purpose of Art-Aorta

Purpose of Art - The Concept

Aorta

The main purpose of art is the expression of boundless ideas and concepts. This effort can model behaviors, shape beliefs, and create shared experiences. In effect, it draws back to us, grows inside us, and becomes a part of us. Through its diverse forms, like literature, music, sculpture, and paintings, art touches every facet of our lives.

The Details

An element of specific joy, pleasure, and awareness, art serves the following functions:

o Religious - The oldest and still prevalent key purpose of art is as a car for religious ritual, witnessed Through the Prehistoric Paintings of France to those of Sistine Chapel in Italy.
o Events Capture - It may also serve as a commemoration of crucial events, such as major historical incident, wedding, and baptism to mention some.
o Communication - It is a way to review with others such as greetings.
o Publicity - Art is also a platform for propaganda or public commentary. Inspirations have been drawn from single viewpoints or the actions of public or underground institutions, like political parties, lobbyists, government, corporate, or religious groups perform. The purpose roots generally to the merciless World War Ii and its after effects. In the case of public commentary, art helps us create the awareness of past or prevailing human conditions, as per an artist's perception.
o Expression of Human Creative Instinct - Through it, we can capture any incident, emotion, or anything, which we can or cannot tap in a photograph. Art is a means of exploring and appreciating formal as well as informal elements. It expands and extends the shared tasteless optical language. When artists come up with new ideas, they are initially perceived as shocking and possibly incomprehensible. With time however, the ideas are accepted.
o Novelty - Art explores and unveils new ways and angles to well-known things. It helps explain situations, new and old, development the use of varied kinds of optical shorthand.
o Visual conception Capture - It may also be carefully as a means of recording optical data. After the Renaissance (14th-17th centuries), French artists like Courbet (1819-77) and Cezanne (1839-1906) showcased more realty based subjects, such as the use of linear perspective and Realism, Through oil painting.
o Parameter of attractiveness - Art as a representative of attractiveness is a challenged conception in the modern era. With the community becoming more advanced and democratic, the world has broadened its horizons of beauty. Dipped so much in subjectivity for the quotient, any specific parameter cannot be set vis-à-vis art.
o Narration - It is also a great means of storytelling. In the Middle Ages (5th-16th centuries), the sequences of panels were used to tell stories from scriptures or the lives of Saints.

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The Functions of the Nephron of Kidney

The Functions of the Nephron of Kidney-Aortic Valve

A nephron is the fundamental structural and functional part of the kidney. Its requisite function is to control the absorption of water and soluble substances such as sodium salts by filtering the blood, reabsorbing what is required and excreting the rest as urine.

Aortic Valve

A nephron gets rid of wastes from the body, controls blood volume and pressure, regulates levels of electrolytes and metabolites, and regulates blood pH. Its functions are very important to life and are controlled by the endocrine system by hormones like antidiuretic hormone, aldosterone, and parathyroid hormone.

Roughly one million nephrons are in the cortex of each kidney, and each one contains a renal corpuscle and a renal tubule which perform the functions of the nephron. The renal tubule contains the convoluted tubule and the loop of Heinle. The nephron is made up of a glomerulus and its tubule.

The nephron is component of the homeostatic mechanism of your body. This system assists control the quantity of water, salts, glucose, urea and other minerals in your body. This is where glucose ultimately is engrossed in your body. One side note, diabetics get trouble reabsorbing the glucose in their body and thus lots of it appears in the urine - thus the name "diabetic" or "sweet urine." however it's another subject.

The Loop of Henle is the element of the nephron that consists of the requisite pathway for liquid. The liquid starts at the Bowman's capsule and afterward runs by way of the proximal convoluted tubule. It is here that sodium, water, amino acids, and glucose get reabsorbed.

The filtrate after that flows down the sliding limb and afterward back up. On the way it passes a major bend named the Loop Of Henle. This is settled in the medulla of the kidney. Because it comes up to the top again, hydrogen ions (waste) run into the tube and down the collecting duct.
Accordingly fundamentally, nutrients flow in straight through the left and exit straight through the right. Along the way, salts, carbohydrates, and water pass straight through and are reabsorbed.

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Minimally Invasive Total Knee replacement

There is a move over all branches of surgery to achieve operations through small incisions, so-called "minimally invasive surgery". The aim is less pain, less time in hospital and quicker rehabilitation. In knee replacement the drive for this has come from the Usa, where in a shop driven healthcare economy, patients gravitate towards surgeons with progressive and therefore "better" techniques.

Manufacturers of knee replacement components have realised that they can shop directly to patients by using the internet. A visit to the websites of Zimmer or Biomet illustrates the point. Both have leading "patient information" areas which extol the virtues of minimally invasive knee replacement. They are very effectively exploiting one of the basic principles of marketing. Generate a inquire and then fulfill it. There is essential confusion as to exactly what is meant by "minimally invasive". This may be partly intentional for reasons I will interpret later.

As you are probably aware arthritis of the knee can be treated by replacing whether personel bearings of the knee (medial, lateral or patellofemoral) or by total knee replacement. Which is done depends to an extent on the degree of damage to the joint, but there is more to it than that. In the Usa it has been former to replace the whole knee, on the principle that nothing less will do.

This means that very many patients are given total replacements when partial ones would do.

In my institution in the Uk for example 50% of replacements have been partial. In America roughly all patients still receive total replacement. The theorize for development the disagreement between total and partial replacement is that it is uncomplicated to implant small components through small incisions, but implanting the larger components of a total knee through a small hole is very tricky and time-consuming.

Now there is a small group of American surgeons who have made it their mission to push the boundaries of the big component/tiny incision concept. And very well rewarded financially for doing so, I should add. Their clinical sense has been small and the follow-up short, although you wouldn't think this if you type "minimally invasive knee replacement" into "Google". It is as yet unproven that patients go home earlier, get best movements or have literal, surgery. Many other surgeons have tried this coming and find it too difficult. Hence the confusion of the definition.

Implant manufacturers have introduced "mini" or "reduced" incision surgery, and these too have been loosely termed minimally invasive (which has been used by surgeons to fee a price premium), so anyone can claim to do it if they make their incision a bit smaller. These mini incisions are exiguous distinct from that used by the majority of knee surgeons, especially if the inpatient is thin!

The shop for partial knee replacement is dominated by just one company Biomet, the remaining manufacturers therefore have to make the case for using a total replacement in as many patients as possible, hence the thought of " minimally invasive replacement". If the incision is small, then logic decrees that it is a small operation.

The principle here should be to do the literal, doing for every patient. The size of the incision should be large adequate to achieve surgery safely and accurately. This does not mean development an incision a yard long for every patient. As many patients as inherent should undergo partial knee replacement through truly minimally invasive incisions. The remainder of severely damaged knees may need a wider exposure.

Cramming large pieces of metal through tiny holes seems to me to be a triumph of technique over reason. Admittedly in many of the illustrations I have seen of the minimally invasive technique published in the American literature, the damage to the knee hardly justifies partial, let alone total replacement. There are major issues about accuracy of implantation of the components, as foresight is so limited. It has been estimated that up to 25% of components are badly aligned. Components that are poorly aligned may give rise to early failure of the knee replacement.

So in a nutshell if you are considering a knee replacement and the topic of minimally invasive surgery comes up, find out what exactly your surgeon means by this. Ask what proportion of your surgeon's patients have partial replacement, as this can be done safely and accurately through small incisions and the clinical results are ordinarily classic to total knee replacement with just as good long-term results.

As ever in orthopaedics, seldom are things what they seem. Produce of joint replacements is a worldwide multi-billion dollar industry, subject to the same competing drive as any other.

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Details About Aortic Valve change surgical operation

The number of population suffering from heart diseases is on the rise today. This is in general due to the sedentary lifestyle of population and because of bad eating habits. Symptoms like chest pain, dizziness, and shortness of breath are an indication of this disease affecting you. This is a type of heart disease and may want an aortic valve exchange surgery. This surgery is an open heart surgery, and is performed by cardiothoracic surgeons.

There are two types of conditions which want an aortic valve exchange surgery. The narrowing health is described as the Stenosis. Whereas the health in which it becomes leaky is known as Regurgitation.

This health affects the young as well as the old. This heart disease is an abnormality which could have occurred while birth, or it can appear as you age. Bicuspid is a coarse congenital condition. It is gift in around 1% to 2% of the population. This health causes it to come to be diseased which progresses as you age and is known as Senile Aortic Calcification. This is due to increased amounts of calcium being deposited. This could succeed in either the Stenosis or Regurgitation.

Shortness of breath while less strenuous activities is another coarse sign which indicates this disease. The succeed of this heart disease is that your heart if forced to work harder. This could succeed in the patient experiencing chest pain which is quite similar to symptoms of a person suffering a heart attack. Getting dizzy or experiencing fainting spells or being light headed are other symptoms which could mean that you want having an aortic valve exchange surgery.

The decision to feel this surgery is based on the symptoms that you are suffering from and the outcome of a number of test results like an echocardiogram or a cardiac catheterization are some of the tests that you may have to go feel to check either you have this disease. An echocardiogram is used to show the enlargement of the heart and a cardiac catheterization provides the same data in detail showing while also helping to identify if the coronary arteries have narrowed.

When you opt for this procedure your valve is supplanted with a prosthesis which can either be a mechanical or biological. Choosing either one will supply the same benefits. While the mechanical one will remain for a longer period of time, the biological one will cause less blood clots to form. Patients who opt to have mechanical ones have to take blood thinners or anticoagulants. The recovery period normally lasts for a week where the patient may spend up to 1 or 3 days in the arduous Care Unit (Icu).

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Types of Congenital Heart Defects

In order to fully appreciate how congenital heart defects can impair the muscle's potential to accomplish its job, it is worth reviewing how the heart normally functions. There are four chambers - two upper chambers (atria) and two lower chambers (ventricles). The left and right sides have exact tasks. The right side sends oxygen-poor blood into the lungs to be oxygenated. That blood, rich with oxygen, returns straight through the left side before being sent into the aorta and throughout your body.

There are four valves that control the flow of blood in the middle of the atria and ventricles, and outward from the ventricles. The right atria and ventricle are separated by a tricuspid valve. The left atria and ventricle are separated by a mitral valve. A pulmonary valve allows blood to flow from the right ventricle into the lungs (first passing straight through the pulmonary artery). An aortic valve allows blood to flow from the left ventricle to the rest of your body (after going into the aorta).

With this brief summary of the muscle's normal function in mind, here are the most coarse congenital heart defects:

Holes In The Muscle

The left and right sides of your heart are separated by a wall called the septum. This wall prevents blood from the left and right atria, and the left and right ventricles from mixing. Some children are born with a hole in this wall. If the hole appears in the middle of the atria, it is called an atrial septal defect. If the hole appears in the middle of the ventricles, it is called a ventricular septal defect. Because these holes allow blood in the middle of the atria and ventricles to mix, it prevents the heart from pumping efficiently.

Valvular Problems

Defects can also impact the valves. Each valve has flaps, or leaflets. If the flaps stiffen, the valve may not be able to open properly. That means less blood can get straight through the opportunity and the heart must work harder. This health is known as stenosis. If the flaps prevent the valve from windup properly, blood can leak straight through the opening. This health is known as regurgitation. In some cases, a valve develops poorly and does not allow blood to pass straight through at all. This is known as atresia, a serious health that can lead to heart disease.

Complex Defects

Complex defects are normally comprised of combinations of simpler defects. The most coarse is known as tetralogy of Fallot. It involves stenosis of the pulmonary valve, a ventricular septal defect, a poorly-positioned aorta, and a thickening of the right ventricular muscle. This type of flaw can only be resolved straight through surgery. In most cases, it requires a surgeon to open the chest in order to way the heart, but minimally invasive techniques may come to be more extensive in the near future.

Severe congenital heart defects are normally identified during pregnancy or within weeks after childbirth. If the problems are less severe, they may not be diagnosed for years. If your child is diagnosed with holes in his or her septum, valvular problems, or involved defects, consult your doctor for guidance.

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Hormone exchange Therapy For Men Over 40

Men can suffer from a health called andropause a health similar to woman's menopause; any way it can be cured using the Hormone Replacement Therapy. In this health what happens is the hormones in men like the testosterone, thyroid and adrenal hormones start declining. There are many reasons for this. Some of them could be Aids, drinking too much alcohol, infection in the testicles, chemotherapy that a man maybe undergoing besides others. It is said that these symptoms create between the ages of late twenties and early thirties. any way other age groups may also be affected.

The symptoms that signify the onset of andropause are decrease in thinking alertness; lack of interest in sexual activity, tiredness and low energy levels, growth in weight, mood swings, sleeping disorders etc. If you expect that you may suffer from andropause in the future you can start taking synthetic hormones on your physician's recommendation. Please do not go in for self medication as you end up doing more harm than good. Also taking synthetic hormones may cause many side effects. The side effects of synthetic hormone replacement law include blood pressure, a number of heart problems, jaundice, reduction in good cholesterol in your body, jaundice etc. Hence it is not a good idea to effect this kind of hormone replacement. any way a new kind of therapy has been developed. It is called the natural hormone replacement therapy.

In this kind of therapy, the hormones that are a man's body requires are extracted from plants. These hormones are quite similar to the natural hormones that your body may yield hence they are termed as bio-identical hormones. The best part is that it has virtually no side effects as they are naturally produced. Now in order to go for the Natural Hormone Replacement Therapy, the inpatient is required to get a hormone diagnosis done. In these tests a sample of the blood or saliva is taken and after conducting a number of tests it is carefully which hormone is lacking in the man's body. After the hormone which is found in lower levels in the body is determined, the doctor will check your height and weight, your daily diet, stress levels of your body, your metabolism etc. Using this as a guideline, he will some up with the ideal agenda for hormone replacement therapy.

He will then prescription the required prescription which would literally be available with the pharmacy. Then your therapy starts. It is literally considerable for you to take your tablets on time and in spoton doses. It should neither be too high nor too low as both of them will be prove to be harmful to you and your body. The medicines should be taken for the time duration the doctor prescribes. After you have completed the prescribed duration you would have to visit the doctor again and get the tests done again.

This recipe to cure Andropause is safe and there is no cause for concern. So if you are suffering from this qoute go and visit your doctor.

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