PURPOSEWe aimed to report our preliminary results of subcarinal ventilation-assisted Y-shaped stent insertion under local anesthesia for patients with complex lower tracheal-carinal-main bronchial complex stenosis.
MATERIALS AND METHODSSeven consecutive patients with lower tracheal-carinal-main bronchial complex stenosis underwent Y-shaped stent insertion under local anesthesia. During the procedure, subcarinal ventilation was performed using a 4 F angiographic catheter, and stent insertion was performed under the protection of ventilation. Data on technical success, clinical outcome, and follow-up were collected and analyzed.
RESULTSSubcarinal ventilation-assisted Y-shaped stent insertion under local anesthesia was technically successful in all patients without any major procedure-related complications. Seven stents were inserted in seven patients. Respiratory function improved in all patients, with the Hugh-Jones classification of respiratory status improving from grade IV-V before stenting to grade I-II after stenting. During the follow-up, one patient experienced re-stenosis of the stent. Average survival time was 185.7 days (range, 96-285 days) after the stenting procedure.
CONCLUSIONSubcarinal ventilation-assisted Y-shaped stent insertion under local anesthesia can be an effective, simple, and safe method for lower tracheal-carinal-main bronchial complex stenosis.
Based on natural climate characteristics, road building conditions and traffic situations in African desert district, the problem of typical structure of asphalt pavement was studied by data investigation. Considering the principle of road structure and design, the optimal values of thickness and materials of structural layers were recommended. The research results establish a guideline for the design of asphalt pavement structures and provide a sufficient technology support to develop pavement infrastructures in African desert districts.
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