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Dogs have low thyroid hormone disorders how to do oral thyroxine

dogs have low thyroid hormone disorders how to do , if the dog's body appear constantly hair loss, especially the back near the tail section, was bald phenomenon, in addition, often show the poor state of mind. So, we must wonder whether it is caused by abnormal thyroid.

狗狗有低甲状腺素症怎么办 口服甲状腺素

What are the symptoms of low thyroid hormone

low thyroid disease refers to a lack of thyroid hormone. Low thyroid disease can cause cell dysfunction.

The etiology

1 hypothyroxinemia primary disease: clinical belonging to about 95% of cases this is due to their lack of thyroid function caused by the main case are the following:

· lymphocytes invade the thyroid: when more than 75% of thyroid destruction, there will be clinical symptoms.

· atrophy of hair: adipose tissue, and inflammatory cells replace the original cells.

· unexplained: cancer, drug therapy and radiology treatment.

2-onset low thyroid disease: clinical cases about 5% belong to this, the main factor is secreted by the pituitary TSH deficiency caused. The reason may be violations of the anterior pituitary gland under the brain tumor cells.

Clinical symptoms

1. Typical symptoms

Primary hypothyroxinemia duration function and disease is generally slower genus potential, so the clinical symptoms and laboratory tests are not easy to find. Generally the following changes occur:

· change the overall appearance and behavior: weight gain (slight to significant obesity), but does not increase the appetite. Drowsiness, slow, motion power is not lasting, cold and low body temperature.

· change in physical appearance: hair dry, bald, serious hair removal, hair regrowth difficult (mostly of symmetry, and the ventral side more in the trunk, the hips, tail, nose and neck abdomen). Over-melanoma skin precipitation, mucinous edema (thickening of the skin, especially the face), of secondary pyoderma and wound healing.

· Digestive system: poor appetite, vomiting, diarrhea and constipation.

· reproductive system: no girls dog in heat,Unable to bear children and abortion; male dog lack of sexual desire, testicular atrophy, lack of sperm, and can not have children. .

2 atypical symptoms

· nervous and muscular system: muscle weakness and athleticism are not lasting. Peripheral nerve disorders (such as facial palsy and forefoot shuffle, but is a rare symptom).

· Growth: impaired growth, such as dwarfism and cretinism.

· Cardiovascular system: heart rate reduction, weak apex beat and myocardial damage.

· eye: cornea fat deposition, chronic uveitis, glaucoma, corneal and conjunctival drying.

· abnormal blood clotting: because thyroxine will strengthen the clotting factor coagulation.

diagnostic modality

For the diagnosis of clinical symptoms, many diseases have similar clinical symptoms, sometimes even in euthyroid dogs have similar symptoms and even improved after administration of thyroxine.

As for obesity, motion and force is not persistent skin lesions and other diseases, is very common in older dogs who, but there are many non-thyroid factors can cause low normal thyroid function, and therefore measured in serum thyroxine too low. To confirm Therefore, in addition to careful observation of clinical symptoms, serum thyroxine need more precise measurements.

In laboratory tests by blood biochemical tests may confirm the diagnosis.


because of advances in biotechnology, and now oral thyroxine is already quite cheap, but after use should pay attention to whether there is a reaction of thyroid disease: polyuria, thirst, rapid heartbeat, restlessness, serum thyroxine (T4) is too high. So after the start of two weeks of treatment, to be based on clinical status and serum thyroxine values ​​to adjust the dose.

breed predilection

low incidence of dogs suffering from thyroid hormone 1: 156 ~ Ⅱ500, because of the different diagnostic criteria vary. Serum thyroxine concentration is higher than small dogs medium dogs and large dogs, puppies and dogs was higher than the old, and therefore the disease occurs mainly in older dogs large dogs who (aged 4-10 years) in which gender the difference is not big, but implementation had neutered dogsDog more susceptible to the disease.

predilection for the gold retriever breed, miniature schnauzer, Dachshund, Cocker Spaniel, Great Dane and Old English Sheepdog and so on.

after treatment status

given oral thyroxine can significantly improve quality of life, but require long-term medication.

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