tracheal collapse in the Yorkshire terrierNew surgical therapy using an intraluminal prosthesis the collapse of the trachea results in a narrowing of the trachea as a result of a weakness of the hyaline cartilage clasps and an additional relaxation of the achy muscle. The cartilage braces of the trachea must be subjected to the negative pressure resist inhalation, comparable to the metal rings in the vacuum cleaner pipe.
The dog is a multifactorial, congenital disease that occurs before the inhalation. especially with dwarf dogs, like Yorkshire terrier, dwarf poodles, Chihuahua, maltese and with a dwarf point.
Yorkshire terrier bitch before tracheal stent implantation.
Affected dogs showed despite the already existing change of the trachea no clinical symptoms. Only when additional factors occur, such as pneumonia, obesity, heart failure, or an allergic reaction, there are symptoms. Clinically, the affected dogs show coughing, shortness of breath, especially when Panting, clearly perceptible noises during the painting, later also during the exhale. In advanced cases, the dogs can have seizures up to and including unconsciousness shows what is caused by the lack of oxygen. In chronic cases, in addition to the trachea, the stem bronchi of the lungs are affected and secondary heart changes occur. These patients have an unfavorable prognosis despite therapy.
The diagnosis of tracheal collapse is determined by means of two x-rays, the other when breathing out. The endoscopic examination of the trachea under anesthesia confirms the diagnosis.
Lateral x-ray of a Yorkshire Terrier during inhalation. The collapsing trachea is marked by the arrow.
Endoscopic image of tracheal collapse a distinct flattening (top) is visible. If inhalation results in negative pressure, the trachea can collapse completely, which can be done endoscopically. to be depicted.
Most (71%) of the dogs with a collapse of the trachea can be treated with medication. can be stabilized. The therapy is usually a combination therapy of antibiotics, anti-inflammatory, coughing, tranquilizing and bronchodilatation medications.
Various procedures for surgical treatment of this disease include but are characterized by moderate to no success. The surgical attachment of tracheal ring prostheses from the outside is invasive and difficult. If the area of the trachea in the thorax is also affected, these can be done not use technology.
The insertion of an intraluminal prosthesis (stent) via the mouth directly into the trachea is a new technique. Here the trachea is supported from the inside and kept open. The stent is a metal braid folded together, which is like a spring jumps open when it is released from its shell. Over long years this technique was not successful since postoperatively most of this prosthesis was coughed out because the trachea anchorage was inadequate.
Only after the application of a stent from human medicine, which was inserted into the vascular and bile duct system, good therapeutic successes have been achieved with the treatment of tracheal collapse. in order to determine the correct position of the stent under x-ray control, the stent only partially unfolded (right end). the stent is completely unfolded. In comparison to the situation before the collapse of the trachea is no longer present.
The trachea is no longer collapsed after the stent is fully deployed. during the endoscopic follow-up inspection, it can be shown that the stent has not slipped and the diameter of the trachea has been restored. endoscopic follow-up.18 months after the operation, the dog shows good health and Performance, with only occasional cough.