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Factors predicting mortality of patients with lung abscess.

BACKGROUND: The rates of morbidity and mortality associated with lung abscess are still significant despite the introduction of antibiotic treatments. The aim of this work was to identify the factors that predict a poor outcome for patients with lung abscess. METHODS: We retrospectively reviewed the records and the roentgenographic files of adult patients with lung abscess who were hospitalized from 1980 to 1996 at the Hadassah University Hospital, in Jerusalem, Israel. RESULTS: The study population comprised 75 patients, and the mean age was 52 years old (range, 12 to 89 years). The mean (+/- SD) hospitalization duration was 25.7+/-21.5 days (range, 5 to 94 days). Fifteen patients (20%) succumbed to the infection. The patients who died had more predisposing factors (+/-SD), such as pneumonia, neoplasm, and altered consciousness, than those who survived, respectively: 2.73+/-1.4 vs 1.9+/-1.3 (p < 0.03). The patients with anemia on admission (hemoglobin levels of < 10 g/dL) had a higher mortality rate than those with higher hemoglobin levels, respectively: 58.3 vs 12.9% (p = 0.0008). A higher mortality rate was also associated with infection by Pseudomonas aeruginosa (83%), Staphylococcus aureus (50%), and Klebsiella pneumoniae (44%). The patients who died had larger abscess volumes (+/-SD) than those who survived (233+/-99 vs 157+/-33 mL), although it did not reach statistical significance. The diameter of the abscess correlated with the hospitalization time (r = 0.5; p < 0.001). CONCLUSION: High rates of morbidity and mortality are associated with lung abscess despite appropriate antibiotic therapy and better supportive care. In patients with several predisposing factors, such as a large abscess size and a right-lower-lobe location, the prognosis was worse. The patients infected with S aureus, K pneumoniae, and particularly P aeruginosa had an ominous prognosis. As the prognosis for lung abscess has not improved sufficiently since the introduction of antibiotics, other modalities should be considered for patients with poor prognostic signs.

Adolescent↗

Percutaneous drainage in the treatment of Klebsiella pneumoniae lung abscess.

Seven cases of lung abscess involving Klebsiella pneumoniae with or without other pathogens presented with gross expansion of the involved lobes or segments and severe clinical illness despite medical treatment. Operative management by rib resection and tube drainage was successful in each case, one of which was found to be an infected cryptococcoma. Postoperative bronchograms were made in six cases.

Adolescent↗

Pyogenic lung infections: factors for predicting clinical outcome of lung abscess and thoracic empyema.

Lung abscess and thoracic empyema continue to cause significant morbidity and mortality despite appropriate antibiotic therapy and various options for drainage of empyema. Multiple factors, including the patient's general state of health, the presence of underlying disease, the virulence of the pathogen responsible, and the promptness of drainage of empyema, appear to dictate the clinical outcome. However, the available data are derived from uncontrolled, retrospective studies and the high morbidity and mortality rates underscore the need for large prospective studies to better evaluate factors that may predict the clinical outcome of these conditions.

Drainage↗

Clinical management and outcome of childhood lung abscess: a 16-year experience.

In order to evaluate the clinical manifestations, management and outcome of childhood lung abscess, a retrospective chart review of 27 pediatric patients with International Classification of Diseases, Ninth Revision-Clinical Modification (ICD-9 CM) code of 503.1 (lung abscess) from August 1987 to August 2003 was conducted. Among the 27 patients (14 males and 13 females), 30% (8/27) were primary lung abscess and 70% (19/27) had underlying chronic diseases (secondary lung abscess). The predisposing factors of the primary group (n = 8) included 6 cases of respiratory tract infection, 1 with choking during swimming, and 1 with laceration wound. The underlying diseases in the secondary group (n = 19) included 10 cases of hematologic disorder (52%), 3 of congenital heart disease, 2 of central nervous system anomalies, and 1 each of hyperimmunoglobulin E syndrome, chronic lung disease, liver cirrhosis with fistula formation, and Swyer-James syndrome. Eleven patients (41%) underwent diagnostic tapping, including echo-guided aspiration (10 cases) and computed tomography-guided percutaneous needle aspiration (1 case). Positive yield rate from aspiration of lung abscess was 63.6% (7/11). Surgical intervention was performed in 8 (42%) of the secondary group and in 1 patient from the primary group. The pathogens were identified in 11 patients (41%): 5 with oral flora, 2 with Staphylococcus aureus plus other pathogens, 1 with S. aureus alone, 1 with Pseudomonas aeruginosa plus Proteus mirabilis, 1 with P. aeruginosa alone, and 1 with Aspergillus. The average duration of parenteral antibiotic use was 40 days. Five cases (18.5%) died due to poor control of the underlying diseases, and 4 of the patients (15%) had sequelae (2 with bronchiectasis and 2 with lung fibrosis). Seventy percent of lung abscess occurred in children with underlying medical conditions. Early percutaneous aspiration has an important role in identification of pathogens. Oral anaerobes and S. aureus are the core pathogens in primary lung abscess and gram-negative pathogens should also be considered in secondary lung abscess.

Adolescent↗

The value of a CT-guided fine needle aspirate in infants with lung abscess.

OBJECTIVE: To describe the range of pathogens isolated from a lung abscess in infants less than one year of age. To assess the role of direct culture from the abscess. METHODS: The two index cases were managed in 2002. An institution-based review was conducted of all infants up to one year of age diagnosed with a lung abscess between 1989 and 2002. Data sources were hospital's disease index and Neonatal Intensive Care Unit Audit database using ICD9 and ICD10 diagnostic codes for 'lung abscess'. RESULTS: Five infants, under the age of one year, were treated for a lung abscess. In the one case where the abscess was left-sided it was associated with a congenital cystic adenomatoid malformation of the lung. Pathogens were isolated following direct culture of the abscess in four cases. In three cases a single pathogen was isolated: pseudomonas aeruginosa, staphylococcus aureus and haemophilus influenzae. In one case a mixture of escherichia coli, streptococcus milleri and an anaerobe, propionibacteria, were cultured. Antibiotic therapy was directed at the identified pathogen(s) in all four cases. There was no mortality or recurrence. CONCLUSION: Predisposing factors for a lung abscess in infancy include prematurity, assisted ventilation, congenital lung anomaly and aspiration. Given the range of potential pathogens, direct culture by CT-guided fine needle aspiration is recommended to direct appropriate intravenous medical therapy provided the abscess is located peripherally.

Anti-Bacterial Agents↗

Transbronchial catheter drainage via fiberoptic bronchoscope in intractable lung abscess.

The use of the fiberoptic bronchoscope as a drainage procedure for lung abscess has become more and more widespread. We have recently adopted the technique of inserting a simple polyethylene catheter through the flexible fiberoptic bronchoscope into the abscess cavity of 11 patients with lung abscess. All cases had not responded to aggressive postural drainage and adequate antibiotic therapy for at least a week. The results were as follows: 1) Among 11 patients, the therapeutic response was dramatic in 6 patients. 2) In the successful group, the abscess sizes were greater than 8cm in diameter and the airfluid levels were higher than two-thirds of the cavity. 3) Additional diagnoses, other than bacterial lung abscess, could be made in 2 cases when otherwise the diagnosis would have remained in doubt. The authors suggest that catheter drainage via fiberoptic bronchoscope is an effective treatment modality in the large lung abscess with a high air-fluid level which is intractable to other medical approaches, and it is also a safe procedure.

Adult↗

[The use of late temporary bronchial occlusion in the combined treatment of patients with acute suppurative lung abscesses].

The article presents results of late temporary occlusion of bronchi for prevention of chronicalization of the inflammatory process in 34 patients with acute purulent abscesses of the lungs. Formation of the dry residual cavity with the diameter of 2 cm and more was taken as an indication for such intervention. As a result of the treatment complete recovery was noted in 18 patients (52.9%), the state of 13 patients (38.2%) was improved, 3 patients (8.8%) had no effect. It was found that late temporary occlusion of the bronchi in combination with transdrainage vacuum aspiration made the effectiveness of conservative therapy for lung abscesses higher and reliably increased the amount of completely recovered patients.

Acute Disease↗

Legionella pneumophila lung abscess in a patient with systemic lupus erythematosus.

Lung abscess is an infrequently reported complication of Legionella pneumophila pneumonia associated with a high mortality rate. The risk factors, natural course, optimal method of diagnosis, and optimal therapy of this complication are not well defined. One case of Legionella pneumophila lung abscess occurring in a patient with systemic lupus erythematosus is described, and the reports of 26 other cases are reviewed. This complication is usually hospital-acquired and occurs predominantly in transplant recipients and systemic lupus erythematosus patients treated with corticosteroids with or without a cytotoxic drug. The time interval between the onset of immunosuppressive therapy and infection is usually of several weeks. Progression from pneumonia to abscess formation may be rapid, more commonly within an upper lobe. Transthoracic aspiration within the abscess cavity may be diagnostic, thus obviating the need for open lung biopsy. The prompt institution of erythromycin 4 gm daily intravenously followed by oral therapy for at least 4 weeks is associated with a high survival rate. Adequate drainage from the abscess cavity must be maintained. Radiologic healing may be slow. Long-term survival without relapse does occur. That the clinical spectrum of Legionella pneumophila infection includes lung abscess has not been sufficiently emphasized. This agent should be considered early in the differential diagnosis of lung abscess.

Adult↗

Tube drainage of lung abscesses.

We treated 14 patients who had complicated lung abscesses (all over 4 cm in diameter); 9 patients had concomitant respiratory failure requiring mechanical ventilation. A percutaneous tube was inserted in 11 patients (3 subsequently underwent rib resection) and 3 underwent rib resection with operative insertion of the tube. The resultant bronchopleural fistulas did not interfere with respiratory management despite the use of mechanical ventilation, and only 2 patients required subsequent surgical closure. Eleven patients were discharged from the hospital. Complications were minimal and consisted of 2 episodes of hemorrhage, 1 during operative debridement of the abscess and 1 delayed. Both complications were managed successfully. Three patients died in the hospital, only 1 from complications of the lung abscess. We have concluded from this review that tube drainage can be safe, simple, and efficacious. We recommend it for the treatment of complicated lung abscesses even when associated with respiratory failure and mechanical ventilatory support.

Bronchial Fistula↗

Surgery for lung abscess in immunocompetent and immunocompromised children.

PURPOSE: The aim of this study was to evaluate the surgical management results of lung abscess in immunocompetent and immunocompromised children. METHODS: Surgery was performed on 30 children with lung abscess or necrotizing pneumonia refractory to medical treatment in a 12-year period. Of them, 23 were immunocompetent, and 7 were immunocompromised. Pulmonary resection was performed including unilateral lung in 28, bilateral in 2, and 2 lobes in 6. Concomitant decortication was performed in 18 (78.2%) immunocompetent patients. RESULTS: Increased incidence of surgery for lung abscess was caused mainly by drug-resistant and fungal infection. Surgery was performed commonly for bacterial lung abscess on patients less than 5 years old and fungal lung abscess on adolescence. A multiple small abscess was the predominant type of abscess in immunocompetent patients, whereas 2-lobe involvement tended to occur in immunocompromised patients. Fungal lung abscess tended to occur on left lung and in female patients. Left lower lobe was involved most commonly in both groups of patients in which majority need lobectomy. Immunocompromised patients required a more extensive pulmonary resection. There were 3 postoperative complications (morbidity of 10.2%) with no postoperative mortality. Length of postoperative hospital stay ranged from 6 to 85 days with average of 18.4 days. CONCLUSIONS: The incidence and pattern of lung abscess that required surgery between immunocompetent and immunocompromised children were different. A more aggressive, extensive surgical procedure is preferable for immunocompromised patients, and the surgical results were comparatively excellent to immunocompetent patients. However, the prognosis of immunocompromised children depends on their underlying disease process.

Adolescent↗

[Clinical evaluation of lung abscess diagnosed by transtracheal aspiration].

We have diagnosed lung abscess according to findings of infiltration with cavity formation on chest X-ray and/or CT-scan and pathogens isolated from transtracheal aspirates. We evaluated the clinical features of 20 patients with lung abscess (18 males and 2 females, mean age; 54.3 years). Diabetus mellitus and periodontal diseases were prominent underlying diseases in patients with lung abscess. Cough was complained in 13 patients, chest or back pain in 9, purulent sputum in 8 and hemosputum in 5 when the patients admitted to our hospital. A temperature higher than 38 degrees C was present in 12 patients but temperature les than 37 degrees C in 2. Multiple microorganisms were cultured from TTA in 15 patients. A mean of 2.7 bacterial species per patient was isolated, aerobes alone being isolated in 2 patients, anaerobes alone in 3, and mixed aerobic and anaerobic isolates in 10. Seventeen strains of aerobes and 35 of anaerobes were isolated. Major pathogens were Streptococcus pneumoniae, Streptococcus intermedius and other in aerobes, and Peptostreptococcus micros, Fusobacterium necrophorum, Prevotella melaninogenica and others in anaerobes. Abnormality of chest X-ray was located on the right upper lobe in 6 patients, the right lower lobe in 6, the left upper lobe in 6, the left lower lobe in 4 and the right middle lobe in 1. All patients were cured only by treatment of antimicrobial agents, but cavity formation on chest X-ray remained in 4 patients after the treatment.

Adult↗

[Surgical treatment of lung abscesses].

The authors analysed a group of patients with lung abscesses that received surgical treatment, as well as the characteristics of their evolution. Seventeen patients with lung abscesses which underwent surgical therapy from 1984 to 1995 were analysed. The group was composed of 12 male and 5 female. The age varied from 25 to 78 years (mean-50.1 years). The etiologies were: post-pneumonic, tuberculosis, foreign-body, empyema. Two types of surgical procedures were performed: pulmonary resection and transthoracic drainage. The indication of surgery was based on the failure of clinical treatment, massive hemoptysis, pleural empyema and residual cavity wider than 2 cm after 6 weeks of clinical treatment. The patients with poor clinical conditions were selected to transthoracic drainage, the less invasive procedure. Most patients had a satisfactory post-operative evolution (58.9%). Five patients had complications (29.4%) as empyema and air leak for more than three weeks and two patients died (11.9%). Regarding the surgical technics, the pulmonary resection (lobectomy and segmentectomy) showed no morbidity and mortality. The usage of external chest tube drainage of the abscess had a morbidity of 40% and mortality of 20%. In conclusion, the complicated lung abscess is still a surgical pathology and the best approach seems to be the resection of the pulmonary segment affected. The drainage has specific indication, mainly in patients with deteriorating condition, but this procedure has high mortality and morbidity rates.

Adult↗