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Monday, April 16, 2012

Importance of good document management

The Importance of Good Document Management

Globalization means that workplaces are ever more geographically dispersed. This means that documents are also used more than ever by people in several countries and continents for communicating and collaborating.

You will see communication problems even between employees in the same office because they do not have easy access to the documents that they need. You find some documents kept by someone in the accounts office, shared directories that serve everybody, some documents in paper form, others in electronic form – quite a free-for-all.

An explosion in the number of documents that a company needs does not help. If their storage and indexation are badly organized, these documents become useless because they are almost impossible to find.

The results of poor document management can lead to a significant loss of time. Ask yourself how often you find yourself looking for:

  • A supplier catalogue that has been sent to a purchasing manager,
  • A customer contract signed several months ago,
  • The final set of Terms and Conditions offered to a specific customer,
  • The documents required for employing a new member of staff,
  • An order confirmation sent by a customer to one of your salespeople or, perhaps even more common, when the relevant salesperson has gone on vacation, if you ever received such an order confirmation,
  • A procedure from your quality manual if there has been a process fault,
  • An email which was sent to one of your colleagues,
  • A document that you need to be a template for a specific type of contract,
  • A complete history of communications between yourselves and a supplier about a given contract.

Even worse than the loss of time, perhaps, the lack of good document management is bad for the quality of your organization and the service provided by your company. In such a company it is likely that:

  • sets of documents do not follow a standard layout,
  • all the salespeople prepare quotations in their own way and gradually change the way they do it for themselves but not for the group,
  • a correction to a type of contract stays with a small group of people and does not percolate back into the rest of the company to benefit other users,
  • version management is chaotic or even non-existent.

So a good integrated document management system can be a powerful tool to help in day-to-day company management. With it you could also easily:

  • Continue the work started by a colleague if she has gone on vacation, and respond to her customers if needed,
  • Get hold of examples of all document types with just a few clicks, so that you can follow company standards in such areas as order confirmation, price requests, meeting minutes, customer deliverables, contract examples, and models for faxes and letters,
  • Retrieve procedures and other associated documents if you do not know how to do a certain task – such as things you should do when hiring a new employee, organizing a conference, or structuring meeting minutes,
  • Reuse work done by a colleague to meet similar needs and build on all the individual work done in your own company,
  • Find all the orders for a customer or from a supplier in just a few seconds to answer questions or to continue a discussion when the initial contact point in your company is not available,
  • Build on your working methods and enable your colleagues to benefit from each improvement in a document type or a procedure.

From these examples you can see the importance of a good document management system, and what it might contribute to the improvement of productivity and the quality of the output from each employee.

http://doc.openerp.com/v6.0/book/7/7_19_Documents/7_19_Documents_importance.html


The Importance of documentation in workplace


Documentation, the recording of organizational structures, policies, actions, and goals, is vital to any business, and doubly so for those of us in development. When I came on board I inherited roughly 200,000 lines of code that I had to learn well enough to find and pinpoint individual errors, within the span of about a week. While experience and clues from within the code help somewhat, the job would be nearly impossible without documentation of some kind. And documentation will continue to be important going forward: with so much to manage, it's unlikely I'll remember exactly what a particular piece of code does even a few months down the line unless I leave some easily understandable record. Even outside of the development world, documentation plays a fundamental role in business. It codifies procedures, ensuring everyone in the company does things the same way (hopefully the right way!). It streamlines processes, allowing people to look up answers instead of asking coworkers or reinventing the wheel. And it acts as protection during audits, helping to pinpoint any actions taken against policy. So, how should documentation be developed and integrated into your business practices?

First, it's important to develop your documentation alongside the actual process. Too often developers take the attitude, "Code first, document later." That would be fine if we could stick to it. But in practice it tends to become, "Code first, then code something else, and put off documentation for another time." Instead, you have to consider documentation a priority, updating it while the work you've done is fresh in your mind. Will that make you work slower? At first, yes, but over the long run it should save you time. Instead of thinking of documentation as something that hampers your real work, consider it as part of that work. You can't set aside part of your job because it's slowing down another part.

Second, streamline your documentation process to require the least amount of extra work. It's especially important not to duplicate information. When I'm documenting code, for example, it's often possible to intersperse the code and the documenting comments so that half of the documentation is the code itself. That way I'm not duplicating information by writing it once in code and once in the documentation. Another possibility is to set up automatic documentation procedures, so that you only need to manually fill in specific information. I have a Google document to record changes I make: it automatically fills in several fields for me, and other fields are set up to ease entering that information. This took a bit of extra effort to set up at first, but it reduces the ongoing work.

Third, be sure to structure your documentation. If you're documenting your work as you do it, it's likely that the documentation will be close to the actual work, both in detail and in location. That is wonderfully helpful when you're already looking at a specific piece of work, but what if you're trying to find that piece among all the rest? For that, you need higher-level documentation that gives the general structure of your work, explaining each piece and where to find it. It might also be helpful to give pointers to this general documentation from the specific pieces so you will be able to follow it back. However you choose to do it, make sure that your documentation gives a clear starting point to someone who doesn't already know what they're doing. Hunting for the right documentation is often just as frustrating as trying to understand the work itself.

As I come to grips with the code I have to work with and the duties I'm expected to perform, I'll be reading, updating, and creating the documentation to go with them. I'm hoping that with these principles I can efficiently create documentation enabling me and anyone else who reads it to get up to speed quickly and get the work done.


http://www.plumbersurplus.com/Blog/post/2009/04/07/The-Importance-of-Documentation-in-the-Workplace.aspx

Sunday, April 15, 2012

How often should beddings be changed

How Often Should a Person Change Their Bedding?

There are many different thoughts as to how often a person should change their sheets and other bedding. There are health reasons to change your sheets at least monthly. Most people should change their sheets more frequently. Does this Spark an idea?

Dust Mites
    • It's ideal to change your sheets weekly. People shed skin cells in their beds. Unfortunately, dust mites love to eat dead skin cells, and therefore, dust mites can thrive in your sheets.

      Wash your sheets in hot water weekly to avoid excessive buildup of dead skin cells in your sheets. Some people with allergies may need to change their sheets more often. It's not a big deal if you don't always change your sheets weekly, but it will help reduce the number of dust mites in your bed.

    Other Reasons

    • There are other reasons to change your sheets. If you frequently sweat at night or if someone wets the bed, change the sheets right away.

      It's ideal to have at least three sets of sheets for each bed. If you're not always prompt with laundry, it may be a good idea to have more sets of sheets to make sure you always have a clean set to put on the bed.

    Other Bedding

    • It's a good idea to wash your blankets and comforters or bedspreads every few weeks. This also gets rid of dead skin cells and any dust mites that might be lurking in them. More frequent washing will also help prevent stains and make your room smell nicer.

    Mattress Pads

    • It's also a good idea to use a mattress pad. Mattress pads come in many different varieties. You can get an allergen-reducing mattress pad or a waterproof one. There are many different styles and levels of padding. If you want an extra layer of cushion on top of your mattress, you can get that too.

      Shop around and find the type of mattress pad that best meets your needs. No matter what type of mattress pad you get, they all help protect your mattress from dust mites. And of course, don't forget to wash your mattress pad every few weeks.

    • http://www.ehow.com/way_5165034_should-person-change-bedding.html

Tuesday, April 10, 2012

How to use oxygen safely

How to Use Home Oxygen Safely

How to Use Home Oxygen Safely thumbnail
Use Home Oxygen Safely

Oxygen may be prescribed for use at home for certain medical conditions. Your doctor will order home oxygen if he or she feels you are not getting enough oxygen into your blood. It is essential to learn how to use oxygen safely at home to prevent accidents and get the needed benefits.


Instructions

    • 1

      Decide what type of oxygen delivery device to use. There are three main types of oxygen delivery devices, they include, compressed oxygen in a tank, an oxygen concentrator and liquid oxygen. Discuss the pros and cons of each with your home health company.

    • 2

      Write down information. Your doctor will refer you to a home health company which provides medical equipment for home use. Someone from the company will come to your home to set up the oxygen and instruct you how to use it safely. Ask any questions you have.

    • 3

      Use the prescribed amount. Your doctor will write a prescription for a specific liter flow. This will deliver an approximate percent of oxygen. This is the amount your physician feels you need. Call your doctor before making changes on your own.

    • 4

      Keep the oxygen at least six feet from radiators, furnaces and space heaters. Oxygen is classified as an accelerator. If something was to catch on fire oxygen will make it burn faster.

    • 5

      Don't smoke when using your oxygen, and ask other people to not smoke around you. Post a sign which states "no smoking, oxygen in use." This will help remind visitors to refrain.

    • 6

      Keep oxygen tanks stored upright and secured.

    • 7

      Buy a fire extinguisher and be familiar with how to use it. Oxygen is not flammable but it can speed up how quickly the fire burns. If a small fire was to start it is essential to put it out quickly.

Tips & Warnings
  • Ask you home health company about safety requirements when traveling with home oxygen. Different delivery devices may have specific requirements for travel by air or car.

  • Have a back up device such as a tank when using an oxygen concentrator. Oxygen concentrators use electricity. If the power goes out you will need to rely on an oxygen tank.

http://www.ehow.com/how_2077240_use-home-oxygen-safely.html


Oxygen Therapy: Using Oxygen at Home

If you need oxygen at home, it is important to learn how to use and take care of your equipment. This information will help you get the most from your oxygen treatment.

Key points

What is oxygen therapy?

Oxygen therapy is a way to get more oxygen into your lungs and bloodstream. It is sometimes used for people with diseases that make it hard to breathe, such as COPD, cystic fibrosis, or heart failure. Oxygen therapy can make it easier to breathe. And it can reduce the heart’s workload.

Some people need extra oxygen all the time. Others need it from time to time throughout the day or overnight. A doctor will prescribe how much oxygen you need, based on blood tests. He or she will tell you how much oxygen to use per minute (the flow rate) and how often to use it.

To breathe the oxygen, most people use a nasal cannula (say "KAN-yuh-luh"). This is a thin tube with two prongs that fit just inside your nose. Children and people who need a lot of oxygen may need to use a mask that fits over the nose and mouth.

Your oxygen supply

Oxygen can be delivered to your home in tanks, or cylinders, or it can be produced in your home by a machine called an oxygen concentrator.

  • Oxygen in tanks comes in two forms:
    • Compressed oxygen gas. Tanks of oxygen gas come in several sizes. Small tanks can be carried when you leave home. Large tanks are heavy and are usually not moved after they are placed in the home.
    • Liquid oxygen. Oxygen takes up less space in liquid form than as a gas. Compared to tanks of oxygen gas, tanks of liquid oxygen weigh less and hold more oxygen, so they may be a good choice for people who are active.
  • Oxygen concentrators take in regular air (which is about 21% oxygen), remove the other gases, and produce oxygen that is up to 95% pure.
    • Most concentrators are about the size of a kitchen garbage can and weigh from 30 lb (15 kg) to 50 lb (25 kg).
    • Also, portable concentrators that can be taken on an airplane, bus, train, or cruise ship are available. These weigh less than 20 lb (9 kg), and some even weigh less than 10 lb (5 kg). Portable concentrators can either be plugged into an electrical outlet or run on battery power.
    • Concentrators don't need to be refilled like oxygen tanks do, so they may cost less and be more convenient. But unlike an oxygen tank, a concentrator runs on electricity, so you will need an oxygen tank as a backup in case the power goes out.

Your doctor will help you choose the source that fits your needs. A combination may be best. Some people use a concentrator at home, keep a large oxygen tank on hand as a backup, and have small tanks or a portable concentrator for use outside the home.

Test Your Knowledge

Why do you need a backup oxygen supply when you use a full-size oxygen concentrator?

You need a backup oxygen supply because the concentrator won't work if the electricity goes out.
You need backup oxygen because oxygen concentrators are not reliable.
hy use oxygen therapy?

Some people with lung or heart disease have low levels of oxygen in their blood. This can make them feel tired and short of breath. Oxygen therapy will give you extra oxygen and may help you feel better, do more, and even sleep better. It may also help you live longer if you have low blood oxygen levels.

Test Your Knowledge

Oxygen therapy can increase oxygen levels in the blood.

True
False

  • If you have low blood oxygen levels, breathing extra oxygen can help you feel better and lead to a longer, more active life.
  • You can travel even though you use oxygen, but you'll need to plan ahead.
  • Oxygen is a fire hazard. Follow safety measures to keep you and your family safe.
How to use oxygen therapy

After your doctor prescribes oxygen and you decide on which source you will use, there are a few things to know about using oxygen at home.

Basic instructions

  • Do not change the setting on your oxygen without talking to your doctor first. Turning the flow rate up or down could put you in danger.
  • Keep track of how much oxygen is in the tank, and order more in advance so you don't run out.
  • Do not drink alcohol or take drugs that relax you, such as sleeping pills or sedatives, while using oxygen. They can cause you to breathe too slowly.
  • Call your doctor if you feel:
    • Short of breath.
    • Restless or confused.
    • Very tired.
    • Like you are not getting enough oxygen.

If you use a nasal cannula:

  • Wash the nasal prongs with soap and water 1 or 2 times a week. Follow the maker's instructions on caring for your equipment.
  • Replace the prongs every 2 to 4 weeks. If you have a cold or the flu, change them when your symptoms pass.
  • Use a water-based moisturizer (such as Neutrogena Moisture) on your lips and in your nose to prevent drying and cracking. Read labels, and look for a product that lists water as the first ingredient. Petroleum-based products (such as Vaseline Petroleum Jelly) can plug the air holes.
  • Put a piece of gauze under the tubing to keep the skin behind your ears from getting sore.

Safety tips

Oxygen is a fire hazard. It will make a flame burn hotter and faster. It is very important to follow the steps below to keep you and your family safe.

  • Never smoke or let anyone else smoke while you are using oxygen. Put up "no smoking" signs, and be aware of people smoking near you when you are outside your home.
  • Keep oxygen at least 6 ft (2 m)away from flames or heat sources such as gas stoves, barbecue grills, space heaters, candles, and fireplaces.
  • Do not use flammable products, such as cleaning fluid, paint thinner, or aerosol sprays, while you are using oxygen.
  • Keep a fire extinguisher at home within easy reach. Tell your fire department that you have oxygen in the house.
  • Keep oxygen tanks upright. Make sure they do not fall over and get damaged.

Travel tips

Plan in advance to make sure your trip goes well.

  • Talk to your doctor about whether it is safe for you to travel. Ask your doctor what you need to do to stay safe while traveling. Get at least one copy of your oxygen prescription, and take it with you on the trip.
  • Before the trip, tell the travel company (airline, cruise ship, train, or bus) that you use oxygen. It’s important to talk to your travel company well in advance, because they may have requirements that can take some time to take care of. Traveling with oxygen can be done if you plan ahead.
  • Learn how to use a portable oxygen tank. Know how long it will last. Bring refills if needed.
  • Get a portable oxygen concentrator and learn how to use it. Some types of oxygen concentrators can be taken on airplanes, cruise ships, buses, and trains.

Test Your Knowledge

Airline companies have special rules for people who use oxygen.

True
False

How to use oxygen therapy

After your doctor prescribes oxygen and you decide on which source you will use, there are a few things to know about using oxygen at home.

Basic instructions

  • Do not change the setting on your oxygen without talking to your doctor first. Turning the flow rate up or down could put you in danger.
  • Keep track of how much oxygen is in the tank, and order more in advance so you don't run out.
  • Do not drink alcohol or take drugs that relax you, such as sleeping pills or sedatives, while using oxygen. They can cause you to breathe too slowly.
  • Call your doctor if you feel:
    • Short of breath.
    • Restless or confused.
    • Very tired.
    • Like you are not getting enough oxygen.

If you use a nasal cannula:

  • Wash the nasal prongs with soap and water 1 or 2 times a week. Follow the maker's instructions on caring for your equipment.
  • Replace the prongs every 2 to 4 weeks. If you have a cold or the flu, change them when your symptoms pass.
  • Use a water-based moisturizer (such as Neutrogena Moisture) on your lips and in your nose to prevent drying and cracking. Read labels, and look for a product that lists water as the first ingredient. Petroleum-based products (such as Vaseline Petroleum Jelly) can plug the air holes.
  • Put a piece of gauze under the tubing to keep the skin behind your ears from getting sore.

Safety tips

Oxygen is a fire hazard. It will make a flame burn hotter and faster. It is very important to follow the steps below to keep you and your family safe.

  • Never smoke or let anyone else smoke while you are using oxygen. Put up "no smoking" signs, and be aware of people smoking near you when you are outside your home.
  • Keep oxygen at least 6 ft (2 m)away from flames or heat sources such as gas stoves, barbecue grills, space heaters, candles, and fireplaces.
  • Do not use flammable products, such as cleaning fluid, paint thinner, or aerosol sprays, while you are using oxygen.
  • Keep a fire extinguisher at home within easy reach. Tell your fire department that you have oxygen in the house.
  • Keep oxygen tanks upright. Make sure they do not fall over and get damaged.

Travel tips

Plan in advance to make sure your trip goes well.

  • Talk to your doctor about whether it is safe for you to travel. Ask your doctor what you need to do to stay safe while traveling. Get at least one copy of your oxygen prescription, and take it with you on the trip.
  • Before the trip, tell the travel company (airline, cruise ship, train, or bus) that you use oxygen. It’s important to talk to your travel company well in advance, because they may have requirements that can take some time to take care of. Traveling with oxygen can be done if you plan ahead.
  • Learn how to use a portable oxygen tank. Know how long it will last. Bring refills if needed.
  • Get a portable oxygen concentrator and learn how to use it. Some types of oxygen concentrators can be taken on airplanes, cruise ships, buses, and trains.
http://www.webmd.com/lung/using-oxygen-at-home
How to use oxygen therapy

After your doctor prescribes oxygen and you decide on which source you will use, there are a few things to know about using oxygen at home.

Basic instructions

  • Do not change the setting on your oxygen without talking to your doctor first. Turning the flow rate up or down could put you in danger.
  • Keep track of how much oxygen is in the tank, and order more in advance so you don't run out.
  • Do not drink alcohol or take drugs that relax you, such as sleeping pills or sedatives, while using oxygen. They can cause you to breathe too slowly.
  • Call your doctor if you feel:
    • Short of breath.
    • Restless or confused.
    • Very tired.
    • Like you are not getting enough oxygen.

If you use a nasal cannula:

  • Wash the nasal prongs with soap and water 1 or 2 times a week. Follow the maker's instructions on caring for your equipment.
  • Replace the prongs every 2 to 4 weeks. If you have a cold or the flu, change them when your symptoms pass.
  • Use a water-based moisturizer (such as Neutrogena Moisture) on your lips and in your nose to prevent drying and cracking. Read labels, and look for a product that lists water as the first ingredient. Petroleum-based products (such as Vaseline Petroleum Jelly) can plug the air holes.
  • Put a piece of gauze under the tubing to keep the skin behind your ears from getting sore.

Safety tips

Oxygen is a fire hazard. It will make a flame burn hotter and faster. It is very important to follow the steps below to keep you and your family safe.

  • Never smoke or let anyone else smoke while you are using oxygen. Put up "no smoking" signs, and be aware of people smoking near you when you are outside your home.
  • Keep oxygen at least 6 ft (2 m)away from flames or heat sources such as gas stoves, barbecue grills, space heaters, candles, and fireplaces.
  • Do not use flammable products, such as cleaning fluid, paint thinner, or aerosol sprays, while you are using oxygen.
  • Keep a fire extinguisher at home within easy reach. Tell your fire department that you have oxygen in the house.
  • Keep oxygen tanks upright. Make sure they do not fall over and get damaged.

Travel tips

Plan in advance to make sure your trip goes well.

  • Talk to your doctor about whether it is safe for you to travel. Ask your doctor what you need to do to stay safe while traveling. Get at least one copy of your oxygen prescription, and take it with you on the trip.
  • Before the trip, tell the travel company (airline, cruise ship, train, or bus) that you use oxygen. It’s important to talk to your travel company well in advance, because they may have requirements that can take some time to take care of. Traveling with oxygen can be done if you plan ahead.
  • Learn how to use a portable oxygen tank. Know how long it will last. Bring refills if needed.
  • Get a portable oxygen concentrator and learn how to use it. Some types of oxygen concentrators can be taken on airplanes, cruise ships, buses, and trains.

Test Your Knowledge

Airline companies have special rules for people who use oxygen.

True
False

Stomach acidity

Gastric acid

Gastric acid is a digestive fluid, formed in the stomach. It has a pH of 1.5 to 3.5 and is composed of hydrochloric acid (HCl) (around 0.5%, or 5000parts per million), and large quantities of potassium chloride (KCl) andsodium chloride (NaCl). The acid plays a key role in digestion of proteins, by activating digestive enzymes, and making ingested proteins unravel so that digestive enzymes can break down the long chains of amino acids.

Gastric acid is produced by cells lining the stomach, which are coupled to systems to increase acid production when needed. Other cells in the stomach produce bicarbonate, a base, to buffer the fluid, ensuring that it does not become too acidic. These cells also produce mucus, which forms a viscous physical barrier to prevent gastric acid from damaging the stomach. Cells in the beginning of the small intestine, or duodenum, further produce large amounts of bicarbonate to completely neutralize any gastric acid that passes further down into the digestive tract.

The presence of gastric acid in the stomach and its function in digestion was first characterized by U.S. Army surgeon William Beaumont around 1830. Beaumont was able to study the stomach action of fur trapperAlexis St. Martin due to the latter's gastric fistula.

Contents

[hide]


Physiology

Diagram summarising control of stomach acid secretion, emphasising interaction between the body and antrum.

Gastric acid is produced byparietal cells(also called oxyntic cells) in the stomach. Its secretion is a complex and relatively energetically expensive process. Parietal cells contain an extensive secretory network (called canaliculi) from which the gastric acid is secreted into the lumen of the stomach. These cells are part of epithelialfundic glands in the gastric mucosa. The pH of gastric acid is 1.35 to 3.5[1] in the human stomach lumen, the acidity being maintained by theproton pump H+/K+ ATPase. The parietal cell releases bicarbonate into the blood stream in the process, which causes a temporary rise of pH in the blood, known as alkaline tide.

The resulting highly acidic environment in the stomach lumen causesproteins from food to lose their characteristic folded structure (or denature). This exposes the protein's peptide bonds. The chief cells of the stomach secrete enzymes for protein breakdown (inactive pepsinogen and rennin).HCl activates pepsinogen into the enzyme pepsin, which then helps digestion by breaking the bonds linking amino acids, a process known asproteolysis. In addition, many microorganisms have their growth inhibited by such an acidic environment, which is helpful to prevent infection.


Secretion

Gastric acid secretion happens in several steps. Chloride and hydrogen ions are secreted separately from the cytoplasm of parietal cells and mixed in the canaliculi. Gastric acid is then secreted into the lumen of the oxyntic gland and gradually reaches the main stomach lumen. The exact manner in which the secreted acid reaches the stomach lumen is controversial, as acid must first cross the relatively pH neutral gastric mucus layer.

Chloride and sodium ions are secreted actively from the cytoplasm of the parietal cell into the lumen of the canaliculus. This creates a negative potential of -40 mV to -70 mV across the parietal cell membrane that causes potassium ions and a small number of sodium ions to diffuse from the cytoplasm into the parietal cell canaliculi.

The enzyme carbonic anhydrase catalyses the reaction between carbon dioxide and water to form carbonic acid. This acid immediately dissociates into hydrogen and bicarbonate ions. The hydrogen ions leave the cell through H+/K+ ATPase antiporter pumps.

At the same time sodium ions are actively reabsorbed. This means that the majority of secreted K+ and Na+ ions return to the cytoplasm. In the canaliculus, secreted hydrogen and chloride ions mix and are secreted into the lumen of the oxyntic gland.

The highest concentration that gastric acid reaches in the stomach is 160mM in the canaliculi. This is about 3 million times that of arterial blood, but almost exactly isotonic with other bodily fluids. The lowest pH of the secreted acid is 0.8,[2] but the acid is diluted in the stomach lumen to a pH between 1 and 3.

There are three phases in the secretion of gastric acid:

  1. The cephalic phase: Thirty percent of the total gastric acid secretions to be produced is stimulated by anticipation of eating and the smell or taste of food.
  2. The gastric phase: Sixty percent of the acid secreted is stimulated by the distention of the stomach with food. Plus, digestion produces proteins, which causes even more gastrin production.
  3. The intestinal phase: The remaining 10% of acid is secreted whenchyme enters the small intestine, and is stimulated by small intestine distention.

There is also a small continuous basal secretion of gastric acid between meals of usually less than 10 mEq/hour.[3]


Regulation of secretion

Diagram depicting the major determinants of gastric acid secretion, with inclusion of drug targets for peptic ulcer disease (PUD) and gastroesophageal reflux disease (GERD).


Gastric acid production is regulated by both the autonomic nervous system and several hormones. The parasympathetic nervous system, via the vagus nerve, and the hormone gastrin stimulate the parietal cell to produce gastric acid, both directly acting on parietal cells and indirectly, through the stimulation of the secretion of the hormone histamine fromenterochromaffine-like cells (ECL). Vasoactive intestinal peptide,cholecystokinin, and secretin all inhibit production.

The production of gastric acid in the stomach is tightly regulated by positive regulators and negative feedback mechanisms. Four types of cells are involved in this process: parietal cells, G cells, D cells and enterochromaffine-like cells. Besides this, the endings of the vagus nerve (CN X) and the intramural nervous plexus in the digestive tract influence the secretion significantly.

Nerve endings in the stomach secrete two stimulatory neurotransmitters:acetylcholine and gastrin-releasing peptide. Their action is both direct on parietal cells and mediated through the secretion of gastrin from G cells and histamine from enterochromaffine-like cells. Gastrin acts on parietal cells directly and indirectly too, by stimulating the release of histamine.

The release of histamine is the most important positive regulation mechanism of the secretion of gastric acid in the stomach. Its release is stimulated by gastrin and acetylcholine and inhibited by somatostatin.


Neutralization

In the duodenum, gastric acid is neutralized by sodium bicarbonate. This also blocks gastric enzymes that have their optima in the acid range ofpH. The secretion of sodium bicarbonate from the pancreas is stimulated by secretin. This polypeptide hormone gets activated and secreted from so-called S cells in the mucosa of the duodenum and jejunum when the pH in duodenum falls below 4.5 to 5.0. The neutralization is described by the equation:

HCl + NaHCO3 → NaCl + H2CO3

The carbonic acid instantly decomposes into carbon dioxide and water.


Role in disease

In hypochlorhydria and achlorhydria, there is low or no gastric acid in the stomach, potentially leading to problems as the disinfectant properties of the gastric lumen are decreased. In such conditions, there is greater risk of infections of the digestive tract (such as infection with Vibrio orHelicobacter bacteria).

In Zollinger-Ellison syndrome and hypercalcemia, there are increasedgastrin levels, leading to excess gastric acid production, which can causegastric ulcers.

In diseases featuring excess vomiting, patients develop hypochloremicmetabolic alkalosis (decreased blood acidity by H+ and chlorine depletion).


Pharmacology

The proton pump enzyme is the target of proton pump inhibitors, used to increase gastric pH in diseases that feature excess acid. H2 antagonistsindirectly decrease gastric acid production. Antacids neutralize existing acid.


History



The role of gastric acid in digestion was established in the 1820s and 1830s by William Beaumont on Alexis St. Martin, who, as a result of an accident, had a fistula (hole) in his stomach, which allowed Beaumont to observe the process of digestion and to extract gastric acid, verifying that acid played a crucial role in digestion.[4]



What Is Stomach Acidity?

It is commonly known that excessive secretion of acid leads to hyper acidity. The stomach has a inner lining. If this lining gets damaged or weakened if challenged with certain foods like too much tea, coffee, alcohol or certain medicines like pain relieving drugs. The acidic secretion transverses the stomach and causes pain and discomfort. If this happens repeatedly, it gives rise to gastritis thereby inflaming the lining of the stomach.

Causes Of Excess Stomach Acid

  1. Factors responsible for hyper acidity include excessive intake of pungent and sour food, alcoholic beverages and hot food which cause burning sensations.

  2. Fried, fatty, creamy stuff, chocolate, garlic and onion, coffee, tea and carbonated beverages may also be a reason for increasing acidic levels in your stomach.
  3. Anger, fear, excessive stress, exposure to sun and fire and irregular meals also contribute to acidity.

How To Reduce Stomach Acid

  • Avoid excess salt, oil, pickles, curd, fried food, sour foods like tamarind
  • Increase intake of salads and legumes.
  • Inculcate proper eating habits:
    • Do not eat too fast.
    • Maintain an upright posture after eating.
    • Do not overeat.
    • Dinner should be taken at least three hours before going to bed.
    • Avoid bedtime snacks.
  • Milk acts as an excellent remedy for acidity.

  • Cereals from fresh crops should be avoided.
  • Excess intake of sweets also can cause acidity as sugar causes fermentation and produces acid in stomach.

Natural Remedies For Stomach Acid

  • Chewing of fennel seeds after a meal, stimulates production of saliva, an alkaline solution that helps soothe and protect the food pipe.
  • Two teaspoonfuls of clarfied butter in a glass of warm milk lowers acid levels in your stomach. It also acts as a laxative, which helps flush excess acid from the system.
  • Coconut water is one of the best home remedies for acidity.
  • Take two spoons of Gooseberry powder three times a day.
  • A decoction of sandal if consumed thrice daily, gives good relief from acidity.
http://www.tandurust.com/online-health-tips/stomach-acidity-natural-remedies.htm


Excess Stomach Acid

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What is Excess Stomach Acid?

When we eat food, our body needs to break it down into usable nutrients and vitamins. The process of this breakdown starts off in the stomach. The stomach secretes an acid that is essential in the digestive process, as this acid helps in breaking down the food during digestion.

Usually, protective mechanisms in the stomach and proximal intestine make sure that the acid levels are in balance. However, when the stomach produces too much acid, it results in a condition known as Acidity, or APD. Excess gastric acid is more prevalent in the morning when the stomach is empty.

Excess stomach acid levels can contribute greatly to:

Causes of excess stomach acid:

Symptoms of Excess Stomach Acid:

Excessive Stomach Acid During Pregnancy

There are a couple reasons why pregnant women suffer with excessive stomach acid. One of the main reasons is due to raised hormone levels. When hormones are constantly changing the digestive tract muscles are affected and therefore can result in the way different foods are tolerated. Secondly, a growing baby also crowds the abdomen, pushing acids upwards.

As with many pregnant women, heartburn can be a result of excessive stomach acid. Pregnancy hormones cause the lower esophageal sphincter to relax which allows stomach acid to seep back up into the esophagus, causing acid reflux.

Excessive Stomach Acid in Babies and Children

Just like adults babies and children can suffer from excessive stomach acid too. For growing babies, stomach acid is part of normal digestive system growth. When stomach acid is in excess it can lead to acid reflux in which the stomach acids start to travel up the esophagus thereby resulting in "spitting up" or vomiting. Though many babies suffer from reflux symptoms it can be painful for the child and troubling to parents.

Older children who suffer from excess stomach acid often complain of an upset stomach. Frequently, children who overeat unhealthy foods such as cookies or candy develop excessive stomach acid. Alternatively, nervousness or anxiousness can create tummy acid.

Help for Excess Stomach Acid

Natural Remedies


Many herbal and homeopathic remedies have been formulated with specific ingredients toassist the body in keeping excess gastric acid levels in balance. Mentha Piperita is an herb from the mint family that has been used for many hundreds of years for relief ofindigestion, nausea and heartburn. Its calmative properties relax the muscles of the digestive tract and stimulate the flow of natural digestive juices and bile, thereby assisting healthy digestion.

Nat.Sulph. Is a tissue salt and is known as the 'cell cleanser.' This tissue salt regulates body fluids and helps to promote healthy functioning of the digestive system, thereby preventing nausea as well as the bitter taste in the mouth often associated with acid reflux and regurgitation.

How to Avoid Excess Stomach Acid

  • Try to identify foods that contribute to excess stomach acid. Foods that are spicy, salty and acidic should be avoided.
  • Smoking and alcohol consumption should be stopped to keep stomach acid levels in the stomach and esophagus in harmony.
  • Avoiding stress and moderating your lifestyle to include relaxing techniques can go a long way to prevent excess stomach acid and ulcers, particularly if you are a nervous and emotional person or involved in a high-stress job.
  • Avoid non-steroidal anti-inflammatory drugs (NSAIDs). These drugs may predispose a person to excess stomach acid.
  • Try to eat regular meals and follow a healthy diet.
  • Take extra care when lifting weights, as this puts the abdominal area under added strain and may result in digestion problems.
  • If you have a bout of excess stomach acid, try having an organic glass of fat-free or low-fat milk to help normalize the pH in your stomach.