Search results for "Lung"

Respiratory Mechanics and Gas Exchange in Thoracic Surgery: Changes in Classical Knowledge in Respiratory Physiology

2020

Respiratory mechanics describe the lung function through pressure and flow and the interplay between the two during the respiratory cycle. Derived indices are volume, compliance and resistance (Hess, Respir Care 59(11):1773–1794, 2014). Thoracic surgery in most cases requires the separation of the lungs in order to allow surgery of or near one lung and ventilation of the other lung, while the perfusion to the non-ventilated lung is continued. This has profound implications for the gas exchange and respiratory mechanics.

Physiologie und Pathophysiologie des respiratorischen Systems

2006

Positive pressure ventilation in children is associated with problems similar to those in the adults: development of atelectasis and barotrauma. During anesthesia atelectasis develop in up to 90% of patients, requiring the use of higher inspiratory pressure to recruit the collapsed lung regions. Especially in the preterm, newborn and younger infants, prolonged ventilation disturbs the anatomical structure of the soft and vulnerable immature airways and their subsequent growth and development, leading to tracheomegaly, tracheal collapse, and bronchopulmonary dysplasia and predisposing to bronchial obstruction. On the basis of pathophysiologic knowledge and studies of ventilation in children,…

Surgical treatment of chronic thromboembolic pulmonary hypertension.

2006

Chronic thromboembolic pulmonary hypertension is a commonly overlooked cause of physical incapacity and dyspnoea, with a higher incidence than is generally appreciated and a poor prognosis. The diagnosis can be suspected based on echocardiographic examinations and ventilation perfusion scanning of the lung. Pulmonary angiography still remains the gold standard for the diagnosis of thromboembolic pulmonary hypertension and the assessment of operability. Pulmonary endarterectomy is a complex surgical procedure, which provides permanent relief of thromboembolic pulmonary hypertension and cure for most of the patients. The operation resembles a true endarterectomy of the pulmonary artery branch…

Four-Year Results After Lung Volume Reduction Surgery for Emphysema

2004

OBJECTIVES: While the short-term results of lung volume reduction surgery are known, follow-up over several years has not often been described. The purpose of the present study was to describe results in terms of functional improvement, dyspnea, quality of life, and mortality over a 4-year period in patients with advanced emphysema. PATIENTS AND METHODS: Fourteen successive patients were enrolled between 1996 and 2000 and studied prospectively for 4 years. All patients served as their own controls and initially received pulmonary rehabilitation and medication. Preoperative data were used as baseline and were compared to postoperative data over 4 years. The data analyzed were: functional imp…

Review of difficult airway management in thoracic surgery

2018

The management of difficult airway (DA) in thoracic surgery is more difficult due to the need for lung separation or isolation and frequent presence of associated upper and lower airway problems. We performed an article review analysing 818 papers published with clinical evidence indexed in Pubmed that allowed us to develop an algorithm. The best airway management in predicted DA is tracheal intubation and independent bronchial blockers guided by fibroscopy maintaining spontaneous ventilation. For unpredicted DA, the use of videolaryngoscopes is recommended initially, and adequate neuromuscular relaxation (rocuronium/sugammadex), among other maneuvers. In both cases, double lumen tubes shou…

Vergleich der lokalen Effektivität und des Metastasierungsverhaltens nach Resektion, Kryotherapie und Lasertherapie an einem colorectalen Tumormodell…

2003

A rat colon cancer cell line (CC531) was implanted into the livers of 85 WAG rats and in animals surviving the implantation the liver tumour was subsequently treated with sham laparotomy (n = 15), resection (n = 20), cryotherapy (n = 19) or laser therapy (n = 20). Local recurrence or persistence of the tumour in animals surviving the procedure was observed in 15 of 15 following sham laparotomy, in 0 of 15 following resection, in 3 of 17 following cryotherapy and in 10 of 14 following laser therapy. However, peritoneal disease and lung metastases were more frequent and extensive following resection as compared to cryotherapy or laser therapy.

Computertomographische Funktionsuntersuchung der Lunge nach einseitiger Lungentransplantation mit axialer und koronarer Akquisition

1996

After single-lung transplantation in a patient suffering from obstructive emphysema lung function parameters worsened during follow-up. To complement the routine high-resolution CT (HRCT) scans acquired in inspiration, additional scans were obtained to evaluate regional lung function. The comparison of HRCT scans acquired in inspiration and in expiration revealed different ventilation conditions of both lungs, continuous acquisition in a single slice (dynamic multiscan acquisition) in the axial and coronal plane demonstrated mediastinal shifting and the movement of the diaphragm during the whole breathing cycle. Both modalities can provide important information concerning regional differenc…

Lung Size Mismatch In Bilateral Lung Transplantation Is Associated With Allograft Function And Bronchiolitis Obliterans Syndrome

2011

Thoracoscopic Lung Biopsies and Resections in Children

2016

Pediatric surgeons are frequently faced with a variety of indications regarding the lung. Pulmonary lesions found on imaging studies may be congenital, malignant, infectious, or inflammatory in nature. Often, only a biopsy can make the diagnosis and guide subsequent management. In other cases, resection may be curative.

Repräsentiert der HRCT-Emphysemindex die gesamte Lunge?

2005

Purpose: Comparison of emphysema index derived of thin section MD-CT of the entire lung volume and HRCT, simulated by calculation of every twentieth image of the whole data-set. Materials and Methods: Pulmonary emphysema was quantified by semiautomatic, segmentation of lung borders and assessment of lung volume and emphysema volume within these borders. The emphysema index (pixel index) was calculated. Statistical analysis was done by the sign-test and Bland-Altman-analysis. Results: Median lung volume, emphysema volume and emphysema index are significantly higher in simulated HRCT. Median lung volume (emphysema volume) calculated by HRCT is 5118 ml (407 ml) and 5040 ml (367 ml) calculated …