Use of a double-wire woven uncovered nitinol stent for the treatment of refractory tracheal collapse in a dog: a case report

Abstract

A 2.7 kg, 11-year-old, castrated male Maltese dog was presented for evaluation of a 2-year history of intractable coughing, dyspnoea and cyanosis. A diagnosis of tracheal collapse with myxomatous mitral valve disease was made on the basis of inspiratory and expiratory thoracic radiographs, fluoroscopy and echocardiography. Measurement for stent size selection was performed on thoracic radiographs. A 10 mm (diameter) × 70 mm (length) self-expanding double-wire woven uncovered nitinol stent was used for intratracheal implantation and was deployed under fluoroscopic guidance. On thoracic radiography seven days after surgery, the position of the stent remained unchanged. On presentation six months after surgery, the owner reported that the dog was doing well without medical management. Although studies of various intraluminal stents have been reported in dogs, to the authors' knowledge, use of a double-wire woven uncovered nitinol stent has not been reported previously for the management of a dog with tracheal collapse. Since this particular type of stent with unfixed individual cells provided proper airway patency without stent fracture in the dog in this report, this stent might be used as an alternative to other commercially available nitinol stents in cases of thoracic inlet collapse.

Comparison of three different self-expanding metal stents using rabbit models for the treatment of tracheal collapse

“…The results of this study were favorable and consistent with the theoretical expectations based on the results of previous studies. Successful management of tracheal collapse with a D6 stent has been reported in dogs, and more clinical data will be available soon 5 . Therefore, from a clinical standpoint, stents with an easily expandable and more bendable character are most suitable and recommended for the treatment of tracheal collapse.…”

“…Tracheal collapse in dogs is a progressive condition that can result in life-threatening respiratory diseases, eventually leading to respiratory distress and sudden death. Since the procedure is quick, requires minimally invasive techniques, and covers the entire scope of tracheal lesions, the recent application of intraluminal stents is preferred while treating refractory tracheal collapse 5 . Various stents have been used in veterinary literature as a treatment for tracheal collapse in dogs [6][7][8] .…”

Double-wire woven nitinol stent for treating dogs with refractory tracheal collapse: A case series

“…An intraluminal double-wire woven nitinol stent [Niti-S Biliary Uncovered Stent (D-type); Taewoong Medical] was manufactured and used in the study. Stent placement was performed using methods described in previous studies ( Yoon et al. 2017 ; Kim et al.…”

Stents in Veterinary Medicine

“…For this reason, supporting the trachea with a stent along its entire length is recommended to prevent similar situations. A reduction in the frequency of disorders associated with mechanical failure of the stent became possible after the introduction of the nitinol ‘Fauna’ stent, which is a combined cross-hook braided stent—previous stents were cross-braided [ 37 ]. This modification made it possible for the stent to adapt to the torsional and compressive forces resulting from the animal’s movement, preventing migration or fracture of the stent.…”