An 11-year-old girl with hypoxic-ischemic encephalopathy had gradually developed scoliosis, and she had experienced several episodes of mild wheezing associated with myotonia. Her SpO2 levels had decreased to 20–30% during episodes of severe myotonia. She was referred to a medical center after the abrupt onset of wheezing and respiratory distress. Chest X-ray revealed scoliosis (), and laryngoscopy showed neither supraglottic stenosis nor edema. Chest computed tomography (CT) revealed tracheal stenosis caused by compression by the innominate artery (). Bronchoscopy demonstrated narrowing of the trachea by external compression of its anterior wall as well as tracheomalacia () involving the middle trachea to the tracheal bifurcation. An uncuffed endotracheal tube was inserted distally to the stenosis, and this resulted in a prompt improvement in her respiratory condition. However, she was thought to require long-term tracheal intubation because of the tracheal stenosis and tracheomalacia. Furthermore, she was considered at increased risk of developing tracheal damage and subsequent formation of TIF from tracheal intubation. She was transported to our hospital for preventative ligation of the innominate artery and tracheostomy.\nBrain magnetic resonance CT showed a normal circle of Willis with no occlusion of the internal carotid or innominate arteries. 3D CT demonstrated that the innominate artery crossed the trachea from left to right just cranial to the manubrium (). We planned prophylactic ligation of the innominate artery to prevent the formation of TIF.\nThe patient was positioned supine under general anesthesia. A small curvilinear transverse skin incision was made just above the suprasternal notch. The innominate artery was exposed anterior to the trachea (). After clamping of the innominate artery, the SpO2, as measured at the right hand and oxygen saturation (rSO2) in both cerebral hemispheres, was initially reduced to 70% of baseline readings, but promptly increased to 90%. The innominate artery was transected, and both stumps were closed with continuous absorbable sutures. Thymus tissue was interposed between the proximal and distal stump. After tracheostomy at the 3rd tracheal ring, bronchoscopy revealed a widened tracheal lumen. She was transferred to the intensive care unit for postoperative recovery. The postoperative course was eventful with no neurological complications, and she was discharged on the 6th postoperative day.
A 25-year-old female was brought to our Emergency Room with acute pulsatile bleeding from her tracheostomy with an 8.1 mg/dl hemoglobin value upon admission. The patient suffered from long-term spastic tetraparesis due to cerebral palsy. Sixty months ago, the patient had undergone tracheostomy as a treatment of respiratory failure after aspiration pneumonia with sepsis. Inspection of the trachea using a flexible bronchoscope demonstrated active arterial bleeding from the trachea anterior wall with pooling of blood in the dependent airway. Blood was aspirated to clear the airways, and the cuff of the tracheostomy tube (Tracheoflex 8 mm, Teleflex Medical) was overinflated to control the bleeding in the short term. A diagnostic digital subtraction angiography (DSA) was carried out under emergency circumstances. The initial angiogram with the cuff inflated revealed no visible contrast medium extravasation. Therefore, the cuff of the tracheal tube was first deflated and then the tube was temporarily removed.\nGeneral anesthesia was induced with propofol and sufentanil, neuromuscular blockade was achieved by atracurium. Maintenance was provided with continuous infusion of propofol and remifentanil. A 9F sheath (Terumo) was inserted into the right common femoral artery. A diagnostic digital subtraction angiography (DSA) was carried out using a Tempo4 vertebral 4F catheter (Codman) under emergency circumstances. Straight posterior-anterior and 20° right and left anterior oblique angiographic projections of the brachiocephalic artery with 6 frames per second were acquired with manual bolus injection of each 8 ml Imeron 300 (Bracco Imaging).\nThe acquisition of an aortogram was considered but we decided to upfront continue with selective injections of the brachiocephalic trunk. The brachiocephalic trunk’s selective injection demonstrated a difficult to recognize small dot of contrast medium accumulation, which was considered the site of extravasation from the posterior wall of the brachiocephalic trunk to the anterior aspect of the adjacent trachea. We decided to implant a self-expanding stent-graft into the brachiocephalic trunk to seal the vessel wall’s erosion without covering the subclavian artery’s origin. Using the inbuild measurement tool of the DSA machine (Siemens Axiom Artis Zee) with a calibration of the distance between the target vessel and the table surface, the diameter and length of the brachiocephalic artery was determined as 6.9 mm and 36.7 mm, respectively. The available implant was a Fluency Plus Stent Graft 8 mm × 40 mm (BD Bard), mounted in an 80 cm long catheter with a 9F crossing profile. A stiff 0.035″ diameter and 300 cm length Radiofocus guidewire (Terumo) with an angled tip was navigated into the right external carotid artery using a 4F Tempo4 vertebral catheter (Codman) through a 9F sheath (Terumo), followed by the removal of the 4F catheter. The Fluency Stent Graft was inserted over the said guidewire into the brachiocephalic trunk without using a guide catheter. Deployment of the stent-graft immediately stopped the tracheal bleeding (Fig. ). Post-deployment adaptation of the stent-graft to the vessel wall with balloon angioplasty was not required, since the stent-graft instantaneously interrupted the extravasation. The implanted stent-graft was slightly longer than desired. The proximal end was reaching into the aortic arch but did not compromise the origin of the left common carotid artery. To prevent a thromboembolic occlusion of the stent, a loading dose of 1× 500 mg acetylsalicylic acid (ASA; Aspirin, Bayer Vital) IV and 1× 9 mg eptifibatide (Integrilin, GlaxoSmithKline) IV were given before implantation; 1× 180 mg ticagrelor (Brilique, AstraZeneca) PO was administered immediately after access via a feeding tube. The final DSA run demonstrated no active bleeding, exclusion of the fistula and flow in the right internal carotid, subclavian and vertebral arteries. Daily medication consisted of 2× 500 mg ASA IV and 2× 90 mg ticagrelor PO. Daily testing with Multiplate (Roche Diagnostics) and VerifyNow (Accriva) confirmed dual platelet function inhibition. A follow-up cranial CT was obtained after 30 days due to fluctuating vigilance and revealed no ischemic cerebral lesions. Follow-up bronchoscopy performed after 17 days for recurrent pneumonia showed no bleeding. Antibiotic treatment with Piperacillin/Tazobactam 4 g/0,5 g IV (HEXAL) was initiated on day 1 after the endovascular procedure. After discharge on day 8 after the procedure, the patient suffered from complicated pneumonia. During the second clinical admission, she died 31 days after the endovascular treatment in the intensive care unit from pulmonary failure.