1/10. Lung isolation for the prevention of air embolism in penetrating lung trauma. A case report.PURPOSE: To illustrate a new airway and ventilatory management strategy for patients with unilateral penetrating lung injury. Emphasis is placed on avoiding positive pressure ventilation (PPV)-induced systemic air/gas embolism (SAE) through traumatic bronchiole-pulmonary venous fistulas. CLINICAL FEATURES: A 14-yr-old male, stabbed in the left chest, presented with hypovolemia, left hemopneumothorax, an equivocal acute abdomen, and no cardiac or neurological injury. In view of the risk of SAE, we did not ventilate the left lung until any fistulas, if present, had been excised. After pre-oxygenation, general anesthesia was induced and a left-sided double-lumen tube (DLT) was placed to allow right-lung ventilation. bronchoscopy was performed. The surgeons performed a thorascopic wedge resection of the lacerated lingula. Upon completion of the repair, two-lung ventilation was instituted while the ECG, pulse oximetry, PETCO2, and blood pressure were monitored. Peak inflation pressure was increased slowly and was well tolerated up to 50 cm H2O. The patient's intravascular status was maintained normal. CONCLUSION: patients with lung trauma are at risk of developing SAE when their lungs are ventilated with PPV. In a unilateral case, expectant non-ventilation of the injured lung until after repair is recommended.- - - - - - - - - - ranking = 1keywords = pressure (Clic here for more details about this article) |
2/10. Horizontal gradient in ventilation distribution due to a localized chest wall abnormality.Horizontal gradients in the distribution of ventilation and of regional vital capacities, as well as a reversed vertical, esophageal pressure gradient, were observed in a patient with a unilateral painful chest wall lesion. The distribution abnormalities disappeared after surgical treatment. These findings suggest that the interdependency between chest wall and lungs, and within the latter, between lobes, is an important factor determining the regional distribution of ventilation and the pleural pressure gradient in man.- - - - - - - - - - ranking = 0.66666666666667keywords = pressure (Clic here for more details about this article) |
3/10. flail chest in a neonate resulting from nonaccidental trauma.The authors present a 21-day-old infant who sustained a flail chest as a result of nonaccidental trauma. Initial treatment included endotracheal intubation and mechanical ventilation for hypoxemic respiratory failure followed by the administration of continuous positive airway pressure by nasal cannula. Further evaluation resulted in the identification of nonaccidental as the mechanism of injury. The pathophysiology of flail chest, its etiology, and treatment options are reviewed. In the absence of a documented history of significant thoracic injury or the presence of metabolic bone disease, nonaccidental trauma is the most likely diagnosis in infants and children with a flail chest.- - - - - - - - - - ranking = 0.33333333333333keywords = pressure (Clic here for more details about this article) |
4/10. Persistent pneumothorax treated with continuous positive airway pressure.A patient who presented with persistent pneumothorax after blunt chest trauma is described. The lung re-expanded partially in response to chest drain suction but some areas remained collapsed. The institution of continuous positive airway pressure on an intermittent basis, was followed by complete re-expansion of the lung and resolution of the pneumothorax.- - - - - - - - - - ranking = 1.6666666666667keywords = pressure (Clic here for more details about this article) |
5/10. Spontaneous pneumomediastinum and subcutaneous emphysema.Spontaneous pneumomediastinum with subcutaneous emphysema is a well-documented phenomenon which usually follows a benign course and rarely results in circulatory collapse and death. The condition is caused by a sustained increase in the intra-alveolar and intrabronchial pressure with air dissecting along the perivascular spaces of the mediastinum. The majority of patients respond to conservative therapy and rarely require aggressive surgical intervention. Three cases are presented. The anatomy, etiology and the pathophysiology of the disease are reviewed, and the treatment options discussed.- - - - - - - - - - ranking = 0.33333333333333keywords = pressure (Clic here for more details about this article) |
6/10. Chest-wall deformity following soft-tissue expansion for breast reconstruction.We have presented a case in which the presumed pressure effects of tissue expansion caused multiple nondisplaced rib fractures of the anterior thorax in a patient undergoing breast reconstruction. Although the deformity was severe, a satisfactory cosmetic result was obtained and there have been no clinically significant sequelae during a 1-year follow-up period. The degree of bony deformation was most likely enhanced by the combination of this patient's severe osteoporosis, chronic steroid use, and peripheral vascular disease. The fragility and ease of fracture in the bones of osteoporotic postmenopausal females and the long-term effects of steroids on tissues is well known. We believe this observation to be important, since many reconstructed patients are postmenopausal and have variable degrees of osteoporosis. Many undergo adjuvant chemotherapy with steroids and antihormonal agents, and this group of women may therefore be at a greater risk for the occurrence of pressure deformities. The incidence and long-term significance of such deformities are not known. The reconstructive surgeon should be alert to the possibility of this phenomenon occurring as a result of tissue expansion in the patient with severe osteoporosis, peripheral vascular disease, or chronic steroid use.- - - - - - - - - - ranking = 0.66666666666667keywords = pressure (Clic here for more details about this article) |
7/10. Thoracic epidural analgesia in the treatment of rib fractures.rib fractures and flail chest could be fatal if gas exchange is impaired. Efficient pain relief with continuous thoracic epidural analgesia allows a good physiotherapy management without central sedation and impairment of cough reflex, this prevents pulmonary atelectasis and infection. Eighteen patients/19 were treated with success in spite of flail chest, chronic obstructive pulmonary disease and minor pulmonary contusion. Intermittent positive pressure ventilation must be reserved to severe pulmonary contusion and other crushing injuries of the chest as bronchial or great vessels ruptures.- - - - - - - - - - ranking = 0.33333333333333keywords = pressure (Clic here for more details about this article) |
8/10. Pathologic flail chest complicating multiple myeloma.Pathologic flail chest complicated the initial presentation of multiple myeloma in two patients. Both had severe hypercalcemia and diffuse bone disease. Atelectasis and pulmonary edema preceded the appearance of flail chest in one patient; atelectasis complicated the flail chest in the second patient and increased the severity of the flail. Both were treated with radiotherapy and chemotherapy. However, delay in stabilizing the first patient's chest wall with positive airway pressure was followed by extension of the flail chest and irreversible respiratory failure. On the other hand, prolonged stabilization of the chest wall in the second patient until a chemotherapy-induced remission occurred was associated with resolution of the flail chest.- - - - - - - - - - ranking = 0.33333333333333keywords = pressure (Clic here for more details about this article) |
9/10. brachial plexus palsy secondary to stress fracture of the first rib: case report.An extremely rare case of brachial plexus palsy from a stress fracture of the first rib is reported. The palsy was caused by pressure exerted by excessive callus formation following nonunion. Conservative treatment was unsuccessful, but surgical decompression led to complete resolution of symptoms.- - - - - - - - - - ranking = 0.33333333333333keywords = pressure (Clic here for more details about this article) |
10/10. Combined high-frequency ventilation (CHFV) in the treatment of acute lung injury--a case report.A 22-year-old man was admitted to a district general hospital with chest injuries, a ruptured spleen and limb fractures, sustained in a road traffic accident. After an emergency splenectomy, the patient developed unilateral pulmonary oedema with hypoxaemia which was resistant to both conventional controlled mechanical ventilation (CMV) and independent lung ventilation (ILV). He was transferred to a specialist cardiothoracic unit where high frequency jet ventilation (HFJV) also failed to achieve adequate oxygenation. Combined high frequency ventilation (CHFV), using high frequency pulses from a Bromsgrove Penlon Jet ventilator superimposed onto small tidal volumes from an Engstrom Erica improved oxygenation rapidly to allow decreases in inspired oxygen fraction (FiO2), peak airway pressure (PAWP) and positive end expiratory pressure (PEEP). Progressive weaning from ventilatory support was then possible over five days. CHFV is a valuable technique in the treatment of acute catastrophic lung injury and needs wider recognition.- - - - - - - - - - ranking = 0.66666666666667keywords = pressure (Clic here for more details about this article) |
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