The objective of the paper is a numerical study of heat transfer between perforated metal plates and the surrounding air flows. Different perforation structures can nowadays be found in various industrial products. Besides improving the mechanical properties, the perforations can intensify the heat transfer as well. The heat transfer coefficient depends on a wide range of parameters such as typ...

Large iatrogenic gastrointestinal perforations (greater than 15–20mm) following therapeutic endoscopy remain a challenge despite growing expertise in endoscopic perforation closure techniques. Current treatment options include stenting [1,2] or clipping, including the use of an over-the-scope clipping device [3–5]. We present our experience using a combination of over-the-scope clipping and ste...

Gall bladder perforation is a potentially life-threatening condition. Spontaneous perforation is infrequent and rarely seen in the absence of gallstones but gall bladder perforation is an occasional complication of typhoid fever. If such perforations are not treated in time, mortality rates are very high. We report a case of gall bladder perforation complicating typhoid fever following enteric ...

Bladder perforation during laparoscopy is a recognized, uncommon complication. We present two cases of bladder perforation during laparoscopic gynecologic operations that were detected by gaseous distention of the urinary bag. Bladder perforation occurred through laparoscopic division of adhesion. One bladder perforation was repaired laparoscopically, and the other case was repaired by laparoto...

Spontaneous perforation of biliary tree is rare. It mostly occurs in infants. Most cases are associated with biliary stone or other factors related to the bile flow. We report a case in six-year-old girl, hailing from eastern part of India, with SBP without any predisposition. She presented with acute abdomen for three days. Investigations revealed free fluid in abdomen but no free gas under di...

OBJECTIVE The objective of this study was to evaluate the cytotoxicity of furcal perforation repair materials, GI and MTA, using cell culture technique. STUDY DESIGN The extract of ProRoot MTA and Ketac Molar were treated on PDL cells in a 96-well tissue-culture plate. Cell proliferation after an incubation period of 3 days was determined by using MTT assay. RESULTS The growth of cultured h...

The effect of perforation impedance on the acoustic behavior of reactive and dissipative silencers is investigated using experimental and computational approaches. The boundary element method (BEM) is applied for the prediction of transmission loss of silencers with different perforation geometries. The variations are considered in the porosity (8.4 and 25.7%) and hole diameter (0.249 and 0.498...

Introduction. Retrograde pedal access has been well described in the literature as a secondary approach for limb salvage in critical limb ischemia (CLI) patients. In this manuscript we are presenting a case where retrograde tibiopedal access has been used as a bail-out procedure for the management of superficial femoral artery (SFA) intervention complications. Procedure/Technique. After develop...

Nasal septal perforation may present with various symptoms: epistaxis, crusting, secondary infection, whistling and nasal obstruction. Perforation may be treated by conservative pharmacological treatment or closed by surgical approach. A useful alternative is mechanical obturation, achieved inserting a prosthesis. The present report refers to a study on 15 patients (10 male, 5 female, mean age ...

Purpose To discuss two rare presentations of ocular rosacea in a Hispanic patient and an African American patient with unusual ocular manifestations. Case Report Case  1: a 43-year-old Hispanic woman presented with right eye corneal perforation. Her prior medical history was significant for rosacea only, diagnosed clinically by a dermatologist. Her eye exam showed signs of bilateral ocular ro...