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Regurgitation is a sign of disease in the esophagus, such as obstructions (foreign bodies such as a stick, bone or toy, or a stricture), esophagitis (inflammation of the esophagus) or megaesophagus (dilatation of the esophagus due to weakening of the level muscle). The main divergence between regurgitation and vomiting is that regurgitation is effortless, while vomiting is accompanied by strong abdominal contractions.

How can I tell vomiting and regurgitation apart?

Sometimes this is not easy to do. Commonly speaking, if it happens immediately after eating it is more likely to be regurgitation (though vomiting can still occur then). If the article of the material expelled appears to be thoroughly undigested food, this also supports regurgitation. If the proximity of bile can be confirmed though, it is more likely to be vomiting.

Causes of vomiting

The most base causes of vomiting are dietary related, either through dietary indiscretion (e.g. Overeating, eating overly rich or spoiled food) which causes acute (sudden) vomiting, or adverse food reactions (food allergies) which can cause continuing (long term and intermittent) vomiting.

However, there are a huge whole of other causes arising from either the gastrointestinal system itself (stomach and small intestine) or secondary to disease elsewhere in the body (e.g. Liver or kidney disease). Within the stomach, potential causes include:

1. Gastritis (inflammatory disease)

2. Stomach ulceration

3. Stomach cancer

4. Obstruction (foreign bodies, telescoping of intestine)

5. Hiatal hernia (part stomach herniating through the diaphragm)

Possible causes within the intestine include:

1. Infectious diseases (e.g. Parvovirus)

2. Worms

3. Inflammatory bowel disease

4. Intestinal cancer

Secondary causes of vomiting that are due to disease elsewhere in the body include:

1. Pancreatitis (infection or inflammation of the pancreas)

2. Peritonitis (infection in the abdominal cavity)

3. Hepatitis (liver inflammation)

4. Kidney failure

5. Pyometra (infection of the uterus)

6. Hormonal deficiencies or excesses (e.g. Addisons disease, Diabetes Mellitus, Septicemia, Calcium imbalance)

Other potential causes that do not fit into the above categories are drug reactions (e.g. Digoxin, chemotherapy drugs, Nsaids) and neurological disorders.

Treatment of vomiting

Vomiting is a symptom, not a disease in itself. either or not treatment is suitable depends upon the individual circumstances. If the dog is only vomiting occasionally, is enchanting and otherwise general on examination, treatment is probably not necessary. Some dogs with sensitive digestive systems will vomit once or twice a month regardless of any treatment, and if they are otherwise well this should be ignored.

For acute vomiting cases, the first step should always be to starve the dog for 24 hours (while holding plentifulness of water available ad lib). After the period of starvation, the dog should be offered small portions of a very bland food, such as chicken and boiled rice, for a few days. Meals should be fed as smaller portions any times a day, rather than one larger meal.

Though treating the indication of illness itself will often heighten outpatient demeanor and comfort, it is no transfer for development a correct diagnosis of the basal cause, and sure drugs can be harmful if given blindly (for example, giving metoclopromide to a dog with a gastric or intestinal obstruction). honestly cases of acute and severe vomiting need immediate treatment, as dogs can become rapidly dehydrated, form electrolyte imbalances and aspiration pneumonia otherwise.

Managing the vomiting dog

There are 2 goals when dealing with a vomiting dog:

1. Identify the basal cause

2. Stop the vomiting in a safe and effective manner

In many cases, anti emetic therapy (the technical term for vomiting is emesis, and therefore drugs used to treat it are called anti emetics) is instigated immediately while the cause is being established.

A veterinarian will start by taking a full history, focusing especially on general diet, recent medication, vaccination status and the description of the symptoms. He or she must first make sure that the dog is honestly vomiting and not regurgitating, which has a thoroughly dissimilar set of basal causes. It is also prominent to get a graphic description of the material expelled, and either it contained bile, fresh blood or what appears to be coffee granules (partly digested blood).

The next step is a full clinical examination, including carefully feeling the abdomen, taking the dogs rectal climatic characteristic and assessing the hydration status. Once this is completed, a veterinarian will have a slightly narrowed down list of differential diagnoses in mind. If the dog is not dehydrated, enchanting in demeanor, and both vital parameters and feeling the abdomen were normal, the veterinarian will often (and rightly so) make a presumptive diagnosis of gastritis, or gastroenteritis if diarrhea is present too, and prescription antibiotics to combat the likely bacterial infection. The owner is then likely to be sent home with instructions to starve the dog for 24hrs and give bland food for a few days, alongside the antibiotics. The owner is instructed to monitor the dog closely, and return immediately if there are any signs of deterioration, or 2 to 3 days later for a routine check up.

If there are any findings in the clinical history or the corporal exam that trigger concern, then additional tests are necessary. The first of these is ordinarily blood tests for hematology and biochemistry profiles. Urine and feces may also be analysed, the latter for either nasty bacteria or parasites. additional laboratory tests may be required in sure circumstances, such as bile acid stimulation testing if liver dysfunction is suspected, or an Acth stimulation test to look for adrenal disease.

The next stage of the work up involves imaging. The most beneficial is abdominal radiography (xrays), but ultrasonography and endoscopy can also be very important. Radiography and endoscopy both have to be carried out under general anesthesia, while ultrasonography can be performed conscious. If the imaging does not communicate the basal cause then biopsies may be taken, either endoscopically guided or via exploratory surgery. Histopathology of these samples (studying the tissue microscopically) can give vital clues as to the cause, particularly by differentiating between inflammation and cancer.

The final diagnostic choice is the therapeutic trial. If the dog gets best on the medication prescribed, then it must have been a sure type of disease that responds to that drug. By this rationale, wormers, antibiotics or an exclusion diet trial may be chosen.

Drugs used in the treatment of vomiting

1. Stomach protectants and antacids

These medications are beneficial when stomach ulceration is suspected. Examples contain sucralfate (acts like a band aid over the ulcer), H2 antagonists (reduce acid production) and omeprazole (also reduces acidity).

2. Metoclopromide

This drug blocks a neurotransmitter in the brain called dopamine, which prevents activation of the vomiting centre in the brain (known as the Chemoreceptor Trigger Zone). It is only partially effective in doing this though, and has the additional consequent of expanding transmit motility of the gut. This means it must never be given to dogs that might have a stomach or intestinal obstruction. It can also cause thinking changes such as hyperactivity and disorientation.

3. Phenothiazines (e.g. Acepromazine, Acp)

These are effective at blocking the dopamine receptors mentioned above, in expanding to other receptors involved in the vomiting reflex. They are ordinarily used when metoclopromide has failed, but also have undesirable side effects such as low blood pressure and sedation.

4. Antihistamines

Histamine receptors are also present in the Chemoreceptor Trigger Zone, the part of the brain that controls the vomiting reflex. Antihistamines are effective in blocking vomiting that is due to motion sickness, but are petite use against other causes.

5. Domperidone

Domperidone has a similar performance to metoclopromide in that it blocks dopamine receptors and secondarily blocks serotonin receptors, but it does not have the promotility effects of metoclopromide. However, side effects contain vulval enlargement and potential effects on fertility.

6. Maropitant

This is a new drug that is a Neurokinin 1 (Nk1) receptor antagonist. It can be given orally or by injection, and is very effective at stopping vomiting by working both on the vomiting centre in the brain and on the stomach itself. It is deemed so effective at stopping vomiting that veterinarians must be specific to properly investigate potentially perilous basal causes, that could be masked fatally by this drug.

Help, My Dog is Vomiting

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