Degradation and Fatigue Behavior of 3D Printed Bioresorbable Tracheal Splints

3D 打印生物可吸收气管夹板的降解和疲劳行为

• 批准号: 9751354
• 负责人: Scott J Hollister
• 金额: $ 58.2万
• 依托单位: GEORGIA INSTITUTE OF TECHNOLOGY
• 依托单位国家: 美国
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-08-19 至 2021-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/9751354
• 关键词: 3-Dimensional; 3D Print; Acute; Address; Affect; Anatomy; Animal Model; Animals; Behavior; Blood Vessels; Caliber; Cartilage; Cessation of life; Child; Clinical; Clinical Trials; Custom; Data; Development; Devices; Elements; Emergency Situation; Engineering; Environmental air flow; Event; Failure; Family suidae; Fatigue; Finite Element Analysis; Future; Geometry; Growth; Height; Implant; In Vitro; Legal patent; Length; Life; Liquid substance; Measures; Mechanical Stimulation; Mechanics; Modeling; Molecular Weight; NR4A1 gene; New England; Operative Surgical Procedures; Pathway interactions; Patients; Phase I Clinical Trials; Pre-Clinical Model; Prevalence; Printing; Probability; Process; Property; Publishing; Reporting; Resistance; Risk; Safety; Splint Device; Spottings; Stress; Structure; Surgical sutures; TNFRSF11B gene; TR-2 mycotoxin; Testing; Thick; Thinness; Time; Tracheobronchial; Tracheobronchomalacia; Tracheostomy procedure; United States; airway remodeling; base; cartilage development; clinical application; design; follow-up; improved; in vitro testing; in vivo; insight; mechanical properties; meetings; off-patent; polycaprolactone; pre-clinical; pressure; respiratory; success

Abstract Tracheobonchomalacia (TBM) is a congenital or acquired deficiency of tracheal and/or bronchial cartilages that presents with dynamic airway collapse, respiratory difficulties, and, in severe cases, acute life-threatening events. TBM prevalence is estimated at 1 in 2,200 children1, and severe cases can result in death or require tracheostomy with ventilation for 2-3 years, a significant burden on the child and family2,3. We recently developed a bioresorbable, patient specific 3D printed polycaprolactone (PCL) splint to treat TBM, reporting the first case in the New England J. of Medicine4. Three subsequent children with life threatening TBM were saved with the splint and the first child continues to be asymptomatic 30 months post-surgery. However, long term clinical application of the splint requires further engineering to reduce the risk of fatigue failure in addition to understanding how resorption of the splint affects mechanical deformation and remodeling of the airway to improve safety and efficacy of the splint. In addition, the FDA also requires such data for regulatory approval based on our August 22, 2014 meeting with the FDA to initiate a phase I clinical trial for Humanitarian Device Exempt (HDE) approval. We will address these questions in two specific aims using both in vitro and in vivo preclinical model, the Yorkshire pig. The first aim will characterize splint degradation both in vitro and in vivo for up to 2 years. The second aim will use this data to characterize how the splint affects airway mechanics.

抽象的 气管软化症 (TBM) 是一种先天性或后天性气管和/或支气管功能缺陷 软骨表现为动态气道塌陷、呼吸困难，严重时 病例，急性危及生命的事件。 TBM 患病率估计为每 2,200 名儿童中就有 1 人1，并且 严重者可导致死亡或需要气管切开通气2-3年， 给儿童和家庭带来重大负担2、3。我们最近开发了一种可生物吸收的患者 用于治疗 TBM 的特定 3D 打印聚己内酯 (PCL) 夹板，报告了该领域的首例 新英格兰医学杂志4。随后三名危及生命的 TBM 儿童获救 带着夹板，第一个孩子在手术后 30 个月仍然没有症状。 然而，夹板的长期临床应用需要进一步的工程设计以减少 除了了解夹板吸收如何影响机械性能外，还存在疲劳失效的风险 气道的变形和重塑，以提高夹板的安全性和有效性。在 此外，FDA 还根据我们 2014 年 8 月 22 日的规定要求此类数据获得监管批准 与 FDA 会面，启动人道主义器械豁免 (HDE) 的 I 期临床试验 赞同。我们将利用体外和体内两个具体目标来解决这些问题 临床前模型，约克夏猪。第一个目标将表征夹板退化的特征 体外和体内长达 2 年。第二个目标将使用这些数据来描述 夹板影响气道力学。