background neck reconstruction is considered as one of the most important surgeries in cosmetic and reconstructive surgery. the present study aimed to assess the results of reconstructive surgery of extensive face and neck burning scars using tissue expanders. methods this descriptive prospective study was conducted on 36 patients with extensive burning scars on the neck and face. operation for...

INTRODUCTION: Nearly 75% of breast reconstruction procedures performed by ASPS members in 2015 involved tissue expanders. Despite the advantages of expander-based reconstruction, complications are common and can require early removal of the tissue expander. Patient preference and oncologic factors may also prompt unanticipated removal of the tissue expander. We present our experience with tissu...

INTRODUCTION: Nearly 75% of breast reconstruction procedures performed by ASPS members in 2015 involved tissue expanders. Despite the advantages of expander-based reconstruction, complications are common and can require early removal of the tissue expander. Patient preference and oncologic factors may also prompt unanticipated removal of the tissue expander. We present our experience with tissu...

The effect of the internal heat exchanger (IHE) on the performance of the transcritical carbon dioxide refrigeration cycle with an expander is analyzed theoretically on the basis of the first and second laws of thermodynamics. The possible parameters affecting system efficiency such as heat rejection pressure, gas cooler outlet temperature, evaporating temperature, expander isentropic efficienc...

A new algorithm for simulation of non-isothermal flow in a twin-screw extruder is introduced. In the new algorithm, the finite element mesh of tetrahedral elements is created in the complete barrel including the space occupied by the screws. By partitioning the tetrahedral elements which are intersected by the screw surfaces into two tetrahedral, pyramidal or prismatic finite elements, the new ...

Conventional and new methods for the control of cyclic processes are described and compared on the basis of their performance results achieved in an aluminum extruder plant. The thrust of the work lies in the area of iterative learning control systems. After a brief description of (linear) iterative learning control, the optimizing iterative learning control of cyclic processes is presented. In...

A new type of expander-compressor system called Cross Vane expander-compressor (CVEC) was introduced. This device replaces the expansion valve and compressor in conventional refrigeration systems to reduce the energy consumption and improve the coefficient of performance (COP) of the system. As opposed to many expander-compressor systems in the literature, whereby a separated expander is couple...

BACKGROUND To define the dosimetric coverage of level I/II axillary volumes and the lung volume irradiated in postmastectomy radiotherapy (PMRT) following tissue expander placement. METHODS AND MATERIALS Twenty-three patients were identified who had undergone postmastectomy radiotherapy with tangent only fields. All patients had pre-radiation tissue expander placement and expansion. Thirteen ...

A common sequence for performing staged tissue expander breast reconstruction is to immediately insert a tissue expander, complete expansion before radiotherapy, and then perform the definitive reconstruction after radiotherapy is complete. This study evaluates the outcomes of this treatment regimen in 237 patients over a 10-year period at Northwestern Memorial Hospital. Overall, 62% of the pat...