Cases reported "Mediastinal Emphysema"

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1/134. Successful use of high frequency oscillatory ventilation for pneumomediastinum.

    An infant with pneumomediastinum due to mechanical ventilation was successfully treated using high frequency oscillatory ventilation (HFOV). The 3-month-old male had undergone ligation of a patent ductus arteriosus and suffered from barotraumatic pneumomediastinum in the postoperative period. Computed tomography of the chest confirmed the diagnosis. While using conventional mechanical ventilation the respiratory failure worsened. HFOV was instituted and the patient improved. A lower airway pressure by this mode of ventilation provided significant advantages in the patient with an air leak. He was subsequently extubated and discharged home.
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2/134. Tension pneumothorax complicating diagnostic upper endoscopy: a case report.

    Hypoxemia is common during various endoscopic procedures and may result from a variety of causes. These causes range from benign and otherwise easily reversible events like oversedation to potentially life threatening complications such as pneumothorax. Although pneumothorax has been reported secondary to gastrointestinal perforation as a complication of various therapeutic endoscopic procedures, there has been no report of pneumothorax without perforation. We report a case of a patient who developed severe hypoxemia and hemodynamic instability during diagnostic upper endoscopy as a result of pneumomediastinum and tension pneumothorax in the absence of any signs of gastrointestinal perforation and comment on various possible mechanisms. Immediate endotracheal intubation and bilateral chest tube placement resulted in prompt return of the patient's oxygenation and vital signs back to normal. This report enlarges the list of possible causes of hypoxemia during endoscopy and shows the importance of early and prompt recognition, which allowed directed therapy with a good outcome.
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3/134. Acute spontaneous pneumomediastinum in a child with Hodgkin's disease and pulmonary fibrosis.

    A case of acute spontaneous pneumomediastinum in a 13-year-old boy suffering from Hodgkin's disease and pulmonary fibrosis is reported. He was initially treated for pneumocystis carinii but his respiratory function progressively deteriorated, and fibrosis secondary to bleomycin was suspected. The day before the admission to the Pediatric intensive care Unit the patient complained of anterior thoracic pain, and a chest x-ray revealed a left-sided small spontaneous pneumothorax and pneumomediastinum. Although air leak responded initially to conservative treatment, acute tension pneumomediastinum with cardiopulmonary decompensation recurred 6 days later, while the patient was on mechanical ventilation. Treatment with urgent evacuation of the accumulated air via subxiphoid drainage, using an old but ill-defined technique, resulted in complete resolution of pneumomediastinum and significant improvement of the hemodynamic condition.
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4/134. Spontaneous pneumomediastinum in an 18-year-old black Sudanese high school student.

    Spontaneous pneumomediastinum (SPM) is defined as pneumomediastinum in the absence of an underlying lung disease. It is the second most common cause of chest pain in young, healthy individuals (< 30 years) necessitating hospital visits. It is surpassed in frequency in this setting only by spontaneous pneumothorax. These two conditions may coexist in 18% of patients. The incidence of spontaneous pneumomediastinum varies in different communities and generally is relatively uncommon. Inhalational drug use (cocaine and cannabis) have been associated with a significant number of cases, although cases with no apparent etiologic or incriminating factors are well recognized. Also its recurrence, though uncommon, is worthy of note. It is a benign clinical condition with diverse clinical presentations. physicians' knowledge of the presentation, treatment, and prognosis of SPM will guard against the need for expensive radiologic and laboratory tests. The differential diagnosis of chest pain, shortness of breath, and dysphagia include cardiac, pulmonary, and esophageal diseases. The tendency to pursue these entities may lead to laboratory investigations such as electrocardiograms, arterial blood gases, ventilation/perfusion scans, and contrast radiographic studies of the esophagus.
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5/134. Pneumomediastinum as a complication of extraperitoneal laparoscopic inguinal hernia repair.

    A 52-year-old man with left indirect groin hernia was admitted for elective inguinal repair using the totally extraperitoneal (TEP) approach. After an uneventful intubation, TEP repair of the hernia was performed with three midline trocars. Immediately after extubation, the patient noted severe chest pain. There was a decrease in PaO2 saturation, and neck subcutaneous emphysema was detected. There was no emphysema of the abdomen or of the back. A chest film and thoracic computed tomographic (CT) scan confirmed the presence of pneumomediastinum without pneumothorax. The patient was discharged without complications.
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6/134. subcutaneous emphysema and pneumomediastinum after dental extraction.

    Pneumomediastinum, pneumothorax, and subcutaneous emphysema can occur occasionally after a surgical procedure. Facial swelling is a common complication of dental management. The occurrence of subcutaneous emphysema, pneumothorax, and pneumomediastinum after dental procedures is rare. We present a case with subcutaneous emphysema of the upper chest, neck, chin, and pneumomediastinum after a tooth extraction and discuss the possible mechanism of subcutaneous emphysema. To prevent these complications during dental procedures, dental hand pieces that have air coolant and turbines that exhaust air in the surgical field should not be used.
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7/134. Backache: a rare diagnosis and unusual complication.

    We report an adolescent girl who presented with an acute exacerbation of a chronic backache of 6 months duration. She complained of dribbling micturition, constipation, and an irresistible urge to strain for 72 h. In the waiting area of the local hospital she developed sudden, severe chest pain with progressive swelling of the upper torso. This proved to be the mode of presentation of a haematocolpos due to an imperforate hymen with the unusual complication of mediastinal emphysema. Imperforate hymen is a rare diagnosis, but should be considered when dealing with an adolescent girl with lower abdominal symptoms or backache.
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8/134. Pneumomediastinum in dermatomyositis: association with cutaneous vasculopathy.

    OBJECTIVES: To study the pathogenesis of pneumomediastinum in polymyositis/dermatomyositis (PM/DM). patients AND methods: The clinical records of 48 patients with PM/DM were reviewed, focusing mainly on the presence of pneumomediastinum and cutaneous vasculopathy, and the chest radiographic changes. A patient with pneumomediastinum with a characteristic change in his bronchus is described in detail. case reports of pneumomediastinum in PM/DM in English publications are reviewed. RESULTS: Among the 48 patients with PM/DM, pneumomediastinum was observed as a complication in four patients with DM and none of the patients with PM. Three of the four patients with pneumomediastinum, but only six of the 44 patients without this complication, had associated cutaneous vasculopathy. There was a significant association of pneumomediastinum with cutaneous vasculopathy (p = 0.02) and younger age (p = 0.04), but not with the prevalence of lung disease. A 30 year old man (patient 1) with DM, who had interstitial pneumonitis and skin ulceration due to vasculopathy, developed pneumomediastinum. Fibreoptic bronchoscopy showed white plaques on the bronchial mucosa, which were confirmed by microscopic examination as representing subepithelial necrosis. A literature review showed 13 cases of DM but no patient with PM with pneumomediastinum. CONCLUSIONS: In patient 1, bronchial necrosis due to vasculopathy was strongly suspected as being responsible for the pneumomediastinum. The results suggest that pneumomediastinum was associated not with interstitial pneumonitis but with the complication of vasculopathy appearing as skin lesions in DM.
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9/134. The CT fallen-lung sign.

    On chest radiograph, the diagnosis of tracheobronchial tear is usually suspected because of the persistence of a pneumothorax after chest tube insertion. Since this radiographic pattern is nonspecific, the diagnosis is usually made by bronchoscopy and delayed. The fallen-lung sign consists in the fall of the collapsed lung away from the mediastinum occurring when the normal central bronchial anchoring attachment of the lung is disrupted. In contrast to the persistent pneumothorax, this sign is specific but rarely observed. Our purpose is to present the corresponding CT patterns observed in two cases of right stem bronchus tear, consisting in a caudal-dependent displacement of the right upper lobe bronchus which becomes obliquely oriented.
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10/134. Traumatic pneumomediastinum caused by isolated blunt facial trauma: a case report.

    Traumatic pneumomediastinum is most often identified as an incidental finding in the setting of blunt or penetrating neck, chest, or abdominal trauma. There are only a few cases in the medical literature of a pneumomediastinum following isolated facial trauma. We present a patient who sustained fractures of the lateral and anterior walls of the right maxillary sinus, floor of the right orbit, and right zygomatic arch. subcutaneous emphysema overlaid the right facial region and extended to the left side of the neck and into the mediastinum. We describe this unusual complication with respect to the anatomic relations of the facial and cervical fascial planes and spaces with the mediastinum.
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