Archive for the 'Lung Volume' Category

09 Jul

Bilateral Apical vs Nonapical Stapling Resection During Lung Volume Reduction Surgery: Conclusion

Applying a mathematical model, and using various assumptions about removing different volumes from both nonventilated and ventilated areas of the lung, Hoppin suggested that removal of ventilated areas of the lung reduced maximal volume and flow at a given elastic recoil. In addition, the model predicted only a reduction in volume with the removal of […]

07 Jul

Bilateral Apical vs Nonapical Stapling Resection During Lung Volume Reduction Surgery: Discussion

Centrilobular emphysema typically presents as bilateral upper lobe disease. Although the precise reasons are uncertain, several hypotheses have been proposed. The upper lobes are relatively underperfused in relation to their ventilation. To maintain normal lung function, it is thought that a balance between antiprotease activity and inhaled agents that promote lung destruction must be maintained. […]

05 Jul

Bilateral Apical vs Nonapical Stapling Resection During Lung Volume Reduction Surgery: Respiratory tract infection

Table 4 indicates the incidence of complications between the two groups. Respiratory tract infection was the most prevalent complication in both groups. There was no difference between the two groups in the degree to which this complication occurred. Similarly, the need for reoperation was not different between the two groups. Six patients required reoperation (three […]

03 Jul

Bilateral Apical vs Nonapical Stapling Resection During Lung Volume Reduction Surgery: Results

Forty-seven patients with severe emphysema who underwent bilateral LVRS are included in this study. All had severe airflow obstruction (FEV1, 0.7 ± 0.2 L), significant hyperinflation (total lung capacity, 139 ± 23% predicted), and air trapping (residual volume/total lung capacity, 64 ± 8%). Thirty-two patients underwent biapical resections, and 15 patients underwent nonapical resections of […]

01 Jul

Bilateral Apical vs Nonapical Stapling Resection During Lung Volume Reduction Surgery: Data Analysis

A maximal transdiaphragmatic pressure (Pdi) sniff maneuver was done using esophageal and gastric pressures measured by two balloon-tipped catheters connected to linear pressure transducers (100 ± 5 cm H20; Validyne; Ventura, CA). Pdi was determined by a differential pressure transducer between gastric and esophageal pressures. Maximum sniff maneuvers were accomplished with the patient in a […]

29 Jun

Bilateral Apical vs Nonapical Stapling Resection During Lung Volume Reduction Surgery: Materials and Methods

Operative Procedure The operative methods included the following: (1) biapical resection, which is the removal of emphysematous lung tissue from each lung apex using a linear stapling device via standard median sternotomy or sequential bilateral video-assisted thora-coscopic surgery (VATS); and (2) nonapical resection, which is the removal of the worst emphysematous portions of each lung […]

27 Jun

Bilateral Apical vs Nonapical Stapling Resection During Lung Volume Reduction Surgery

The proposed mechanism of benefit for patients improving after lung volume reduction surgery (LVRS) is thought to be the restoration of elastic recoil of the respiratory system, and in particular, the elastic recoil of the lung. In general, the goal of resection is to remove the worst emphysematous portions of the lung, which are poorly […]

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