• Journal of Veterinary Clinics
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• v.17 no.1
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• pp.266-269
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• 2000

Tracheal collapse at the thoracic inlet is described in a 4 year-old female yorkshire terrier. The initial presenting signs included coughing, dyspnea, cyanosis and collapse. Diagnosis was based upon the clinical signs, physical examination, plain radiography and fluoroscopy. The collapse was corrected by the aplication of a neumber of modified total ring prostheses (m-TRP) applied to the cervical trachea. Clinical complicatons were minimal and limited to mild, short-term coughing. The present study indicated that m-TRP were easy to apply to tracheal collapse and were able to decrese clinical signs. Therefore, m-TRP may be applied to tracheal collapse as new prostheses.

• Journal of Veterinary Clinics
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• v.16 no.1
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• pp.1-7
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• 1999

The purpose of the present study was to evaluate the easiness of suture and fixation of modified total ring prostheses (m-TRP). Twelve healthy dogs (B.W.2-10 kg) were randomly assigned to three groups. In group A (3 dogs), total ring prostheses was fixed by penetrating a suture material through tracheal mucosa. In group B (3 dogs), TRP was fixed by suturing on tracheal cartilage and muscular layer not penetrating through tracheal mucosa. m-TRP was applied to the cervical portions (group M-C,3 dogs), and thoracic portions (group M-T,3 dogs). Operating time of group M-C (37.33$\pm$6.80 min.) was shorter than those of groups B (83.33$\pm$8.50 min.) and A (63.33$\pm$11.06 min.) (p＜0.01). Clinical complications were minimal and limited to mild, short-term hematoma, vomiting, edema, and inflammation. Coughing remarkably decreased in group B rather than group A. Dyspnea was not showed in group A, B, and M-C, but group M-T had a mild dyspnea. Gross postmortem findings were similar in all groups. Mild adhesions were present between prostheses and adjacent structures, but tracheal lumen was clean. Severe adhesions were present where m-TRP had been applied in the thoracic portions. Histopathologic abnormalities included mild to moderate adventitial and periprosthetic fibrosis and mild adventitial inflammation. The present study indicated that m-TRP were easier in suture and fixation than TRP and had no differences in support for trachea and side effects.