Secondly, it was difficult and traumatic when turning over the steel bar in the traditional Nuss procedure. Firstly, the steel plate without curved part was required to be shaped with special tools before the operation leading to the increase of operation time. However, some disadvantages with the Nuss procedure was gradually found. After that, Nuss procedure (NP) and several technical modifications by the placement of metal bars to lift the depressed chest wall was introduced and considered as popular minimally invasive technique to repair PE. First attempt to correct PE was performed in 1911 by Ludwig Meyer and Ravitch procedure was subsequent reported since 1949. The minimally invasive repair of pectus excavatum without any cartilage resection was primarily developed for children, but it has gained more and more widespread acceptance in adults. Pectus excavatum (PE) is the most common congenital deformity of the anterior wall of the chest, affecting 1– live births. Through the main clinical outcome were similar, our results shown that modified procedure may have the shorter operation time, postoperative hospital stay, and operation time for plate removal and less blood loss, which may bring potential clinical benefits to patients. There was no significant difference in the length of incision, postoperative Haller index, cost, number of steel bars, postoperative surgical outcome and incidence of complications between the two groups. 10.90 ± 5.75 ml, p = 0.003) than patients in the traditional procedure group. ResultsĪll patients in the new procedure group had shorter operation duration (51.54 ± 20.32 vs. Outcomes analysis of balanced baseline was performed to compare the intraoperative and postoperative short-term outcomes. In all, 52 patients underwent the modified procedure using the introducer-bar complex (new procedure group), whereas 48 underwent the traditional anti-Nuss procedure (traditional procedure group). Patients with pectus excavatum who underwent surgery between January 2015 and June 2017 were consecutively enrolled in this study. Therefore, a single center, retrospective study was conducted to address this issue. However, there is limited evidence regarding its safety and efficacy. A new kind of introducer-bar complex was introduced. Is on the general properties of systems as opposed to the modeling of specificĭynamics rather than provide a comprehensive review, we pedagogically describeĪ conceptual and analytic approach for understanding and interacting with theĬomplex systems of our world.Shortcoming of traditional Nuss operation on adults is gradually found in the clinical practice. Their environments, multi-scale analysis, and evolutionary processes.
Science, including complexity profiles, the tradeoff between efficiency andĪdaptability, the necessity of matching the complexity of systems to that of This review introduces some of the basic principles of complex systems Complex systems science clarifies when and why such assumptions failĪnd provides alternative frameworks for understanding the properties of complex
#F bar complex pdf#
Siegenfeld and Yaneer Bar-Yam Download PDF Abstract: The standard assumptions that underlie many conceptual and quantitativeįrameworks do not hold for many complex physical, biological, and social Download a PDF of the paper titled An Introduction to Complex Systems Science and its Applications, by Alexander F.
0 kommentar(er)
