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May 23, 2013 AT 7:39 am

Bioresorbable Airway Splint Created with a 3D printer #3d

Adafruit 1547

Bioresorbable Airway Splint Created with a Three-Dimensional Printer — NEJM.

Tracheobronchomalacia in newborns, which manifests with dynamic airway collapse and respiratory insufficiency, is difficult to treat.1,2 In an infant with tracheobronchomalacia, we implanted a customized, bioresorbable tracheal splint, created with a computer-aided design based on a computed tomographic image of the patient’s airway and fabricated with the use of laser-based three-dimensional printing, to treat this life-threatening condition.

At birth at 35 weeks’ gestation, the patient did not have respiratory distress and otherwise appeared to be in normal health. At 6 weeks of age, he had chest-wall retractions and difficulty feeding. By 2 months of age, his symptoms progressed and he required endotracheal intubation to sustain ventilation. The workup revealed the following: an anomalous origin and malposition of the pulmonary arteries, with crisscross anatomy; right pulmonary-artery hypoplasia; compression of the left mainstem bronchus between an abnormally leftward-coursing ascending aorta and an anteriorly displaced descending aorta; air trapping; and postobstructive pneumonia. Despite placement of a tracheostomy tube, mechanical ventilation, and sedation, ventilation that was sufficient to prevent recurring cardiopulmonary arrests could not be maintained.

We reasoned that the localized tracheobronchomalacia was the cause of this physiological abnormality and made a custom-designed and custom-fabricated resorbable airway splint. Our bellowed topology design, similar to the hose of a vacuum cleaner, provides resistance against collapse while simultaneously allowing flexion, extension, and expansion with growth. The splint was manufactured from polycaprolactone with the use of a three-dimensional printer.


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