Related Experiment Video
Updated: Jun 17, 2026

International Expert Consensus and Recommendations for Neonatal Pneumothorax Ultrasound Diagnosis and Ultrasound-guided Thoracentesis Procedure
Published on: March 12, 2020
Increase in intrathoracic volume in pectus excavatum patients after the Nuss procedure
Pei-Yeh Chang1, Zhen-Yu Hsu, Jin-Yao Lai
1Division of Pediatric Surgery, Department of Surgery, Chang Gung Memorial Hospital at Linkou, College of Medicine, Chang Gung University, No. 5, Taoyuan, Taiwan. pyjchang@cgmh.org.tw
Abstract:
In this study, we present finite element analysis models to calculate the increase in intrathoracic volume of pectus excavatum patients after the Nuss procedure. One virtue of our approach is that the measurement of the intrathoracic volume has no time difference and is not affected by postoperative pain, which cannot be achieved with a 2-year difference between pre- and postoperative pulmonary function testing or any other clinical method. The calculations show that the intrathoracic volume of pectus excavatum patients increased by approximately 2.72-8.88% after the Nuss procedure. The increment curve was patient-dependent, although the increment behavior was similar among the six patients examined. The curve of the increase became flat when the elevating force exceeded 80 N or the displacement of the lower sternal end exceeded 2.6 cm in half of our cases.
Related Concept Videos
Pneumothorax-II
Clinical Manifestations:
Pneumothorax II: Pathophysiology
Flail Chest-II
Assessment:
1. Clinical Evaluation:
History:
Pneumothorax-I
Pneumothorax can be even further classified as spontaneous, traumatic, and tension pneumothorax.
Chest Physiotherapy
Purpose
CPT is primarily used for patients with excessive bronchial secretions who have difficulty clearing...
Pulmonary Ventilation: Inhalation
Boyle's law becomes particularly pertinent when examining respiratory...
