The Experts below are selected from a list of 1206 Experts worldwide ranked by ideXlab platform

O. Heizmann - One of the best experts on this subject based on the ideXlab platform.

  • Laparoscopic Treatment of a Rare Right Diaphragmatic Rupture with Small Bowel Herniation after Blunt Thoracic Trauma
    Minimally invasive surgery, 2010
    Co-Authors: H. Hoffmann, D. Oertli, O. Heizmann
    Abstract:

    Blunt traumatic Diaphragmatic Rupture (BTDR) is a life-threatening condition with an incidence from 0,8%–1,6% in blunt trauma, mostly located on the left side. The main prognostic factors are severe side injuries and the delay of diagnosis. We present a rare case of a 68-year-old female, with an isolated right Diaphragm Rupture. The diagnosis was done with a delay of 4 days by thoracic radiographs, which showed a herniation of small bowel into the right thoracic cavity. A reposition of the small bowel and a closure of the Diaphragmatic defect by running suture were carried out laparoscopicly. Although large prospective studies concerning the outcome of laparoscopic approach to right BTDR are still missing, we could show, that laparoscopy can be performed safely in right traumatic Diaphragm Rupture.

D. Van Gansbeke - One of the best experts on this subject based on the ideXlab platform.

Brad W. Warner - One of the best experts on this subject based on the ideXlab platform.

  • Congenital Diaphragmatic hernia masquerading as traumatic Diaphragm Rupture.
    The Journal of pediatrics, 2014
    Co-Authors: Tamar L. Mirensky, Brad W. Warner
    Abstract:

    16-year-old girl without prior medical problems was a driver involved in a high speed car collision. After a prolonged extrication, she arrived in the emergency room with diminished breath sounds on the left side. Initial chest radiograph demonstrated stomach and loops of intestine in the left hemithorax (Figure 1). Computed tomography revealed the stomach, colon, and small bowel in the left hemithorax, consistent with a traumatic Diaphragmatic Rupture. At operation, a smooth, well-defined, non-traumatic defect in the left mid-Diaphragm was found (Figure 2; available at www.jpeds.com) involving the stomach and portions of the liver, small bowel, and colon. The hernia contents were reduced and the Diaphragm was repaired. After an uneventful recovery, the patient admitted to a longstanding history of postprandial abdominal discomfort and increasing dyspnea on exertion, which had now completely resolved.

Akihiro Sasoh - One of the best experts on this subject based on the ideXlab platform.

  • Influence of cellophane Diaphragm Rupture processes on the shock wave formation in a shock tube
    Shock Waves, 2020
    Co-Authors: G Fukushima, Takahiro Tamba, Akira Iwakawa, Akihiro Sasoh
    Abstract:

    Diaphragm opening processes with a finite time affect the generated shock waves and shock tube flows. This effect is dominant in short and low-pressure shock tubes. In this research, a high-speed visualization of the opening process of a cellophane Diaphragm, which is a suitable material for operation in a low-pressure shock tube, is conducted. The self-shaping opening morphology of cellophane Diaphragms is observed at the initial stage with an approximate crack propagation speed of 807 m/s, which is greater than the speed of sound of the test gas. The initial opening motion of the petals, which are formed by cracks, is successfully modeled by the rotational equation of motion. Through analysis of the generation and coalescence of compression waves, whose characteristic velocities are calculated from the measured pressure histories, the shock formation distance is reasonably estimated. From the visualized Diaphragm opening processes and analysis of coalescence of compression waves, we revealed that the initial stage of the Diaphragm opening process plays a dominant role in shock wave formation rather than the entire process.

  • Counter-driver shock tube
    Shock Waves, 2015
    Co-Authors: Takahiro Tamba, Akira Iwakawa, T. M. Nguyen, K. Takeya, T. Harasaki, Akihiro Sasoh
    Abstract:

    A “counter-driver” shock tube was developed. In this device, two counter drivers are actuated with an appropriate delay time to generate the interaction between a shock wave and a flow in the opposite direction which is induced by another shock wave. The conditions for the counter drivers can be set independently. Each driver is activated by a separate electrically controlled Diaphragm Rupture device, in which a pneumatic piston drives a Rupture needle with a temporal jitter of better than 1.1 ms. Operation demonstrations were conducted to evaluate the practical performance.

  • Shock-Tube Operation with Laser-Beam-Induced Diaphragm Rupture
    AIAA Journal, 2006
    Co-Authors: Akihiro Sasoh, Toru Takahashi, Keiko Watanabe, Hiroyuki Torikai, Qian-suo Yang
    Abstract:

    Introduction A SHOCK tube is a fundamental experimental tool for research on shock waves and compressible fluid dynamics. The lowand high-pressure channels in a shock tube are usually separated from each other by a Diaphragm. For operations in a moderate pressure range, plastic material, such as Mylar or cellophane, is used for the Diaphragm. In ideal shock-tube operation, the separation should be instantly and completely removed so that a plane shock wave is generated immediately. However, in practice it takes a finite time for the Diaphragm to be Ruptured before the flow past the Diaphragm reaches the full channel value.1,2 If only a partial area of the Diaphragm is Ruptured or the time required for the Rupture is too long, the shock formation distance cannot be neglected, and/or the postshock pressure deviates from the ideal value. This problem becomes significant when the fill pressure difference between the

  • Active Diaphragm Rupture with laser beam irradiation
    Shock Waves, 2005
    Co-Authors: Toru Takahashi, H. Torikai, Qian-suo Yang, Keiko Watanabe, Akihiro Sasoh
    Abstract:

    We performed shock tube operations with a layer of Diaphragm being Ruptured by laser beam irradiation. Mylar or Cellophane was examined as the Diaphragm material. It has been demonstrated that shock tube can be operated with this new technique. The absorbed energy depends on the material and thickness of the Diaphragm and is an important control parameter.

  • Active shock-tube-Diaphragm Rupture with laser beam irradiation
    42nd AIAA Aerospace Sciences Meeting and Exhibit, 2004
    Co-Authors: Toru Takahashi, Akihiro Sasoh, Keiko Watanabe, Hiroyuki Torikai, Qian-suo Yang
    Abstract:

    We performed shock tube operations with a layer of Diaphragm being Ruptured by laser beam irradiation. Mylar or Cellophane was examined as the Diaphragm material. It has been demonstrated that shock tube can be operated with this new technique. The absorbed energy depends on the material and thickness of the Diaphragm and is an important control parameter.

H. Hoffmann - One of the best experts on this subject based on the ideXlab platform.

  • Laparoscopic Treatment of a Rare Right Diaphragmatic Rupture with Small Bowel Herniation after Blunt Thoracic Trauma
    Minimally invasive surgery, 2010
    Co-Authors: H. Hoffmann, D. Oertli, O. Heizmann
    Abstract:

    Blunt traumatic Diaphragmatic Rupture (BTDR) is a life-threatening condition with an incidence from 0,8%–1,6% in blunt trauma, mostly located on the left side. The main prognostic factors are severe side injuries and the delay of diagnosis. We present a rare case of a 68-year-old female, with an isolated right Diaphragm Rupture. The diagnosis was done with a delay of 4 days by thoracic radiographs, which showed a herniation of small bowel into the right thoracic cavity. A reposition of the small bowel and a closure of the Diaphragmatic defect by running suture were carried out laparoscopicly. Although large prospective studies concerning the outcome of laparoscopic approach to right BTDR are still missing, we could show, that laparoscopy can be performed safely in right traumatic Diaphragm Rupture.