The Experts below are selected from a list of 1056 Experts worldwide ranked by ideXlab platform

Olav Skatvedt - One of the best experts on this subject based on the ideXlab platform.

  • evaluation of a portable recording device reggie with actimeter and nasopharyngeal Esophagus Catheter incorporated
    Respiration, 2005
    Co-Authors: Britt Øverland, Guttorm Bruskeland, Harriet Akre, Olav Skatvedt
    Abstract:

    Background: Portable recording devices without electroencephalogram recordings are frequently used for diagnosis of sleep-disordered breathing. However, an exact measure of sleep is important, since the diagnosis is based on the average number of events per hour of sleep, the apnea/hypopnea index (AHI). Actimetry is a simplified method for distinguishing sleep and wakefulness by measurements of activity. Objectives: In this study, recording with a portable recording device (Reggie) including an incorporated actimeter and polysomnography were done simultaneously in order to test the effect of the actimeter. Methods: The study was performed at the sleep-related breathing disorder unit at the Ullevaal University Hospital, Oslo, Norway. Fifty-two consecutive patients referred to the hospital for diagnosis of sleep-disordered breathing were included. Results: There is agreement between the AHI obtained from the polysomnography and the AHI obtained from the Reggie system. The estimated mean difference is 3.5, with an SD of 5.3 (r = 0.98). The sleep time calculated with the Reggie system is greater than the sleep time obtained by polysomnography, the mean difference being 46 min, SD 56 min (r = 0.45). Conclusions: Sleep time calculations with the Reggie system overestimate the sleep time. Still, the AHIs obtained by the two systems show good agreement. There is a slight tendency for the Reggie system to provide an AHI which is too low. This difference is small, and in most cases, it will be of no clinical significance.

  • Evaluation of a portable recording device (Reggie) with actimeter and nasopharyngeal/Esophagus Catheter incorporated.
    Respiration; international review of thoracic diseases, 2005
    Co-Authors: Britt Øverland, Guttorm Bruskeland, Harriet Akre, Olav Skatvedt
    Abstract:

    Background: Portable recording devices without electroencephalogram recordings are frequently used for diagnosis of sleep-disordered breathing. However, an exact measure of sleep is important, since the diagnosis is based on the average number of events per hour of sleep, the apnea/hypopnea index (AHI). Actimetry is a simplified method for distinguishing sleep and wakefulness by measurements of activity. Objectives: In this study, recording with a portable recording device (Reggie) including an incorporated actimeter and polysomnography were done simultaneously in order to test the effect of the actimeter. Methods: The study was performed at the sleep-related breathing disorder unit at the Ullevaal University Hospital, Oslo, Norway. Fifty-two consecutive patients referred to the hospital for diagnosis of sleep-disordered breathing were included. Results: There is agreement between the AHI obtained from the polysomnography and the AHI obtained from the Reggie system. The estimated mean difference is 3.5, with an SD of 5.3 (r = 0.98). The sleep time calculated with the Reggie system is greater than the sleep time obtained by polysomnography, the mean difference being 46 min, SD 56 min (r = 0.45). Conclusions: Sleep time calculations with the Reggie system overestimate the sleep time. Still, the AHIs obtained by the two systems show good agreement. There is a slight tendency for the Reggie system to provide an AHI which is too low. This difference is small, and in most cases, it will be of no clinical significance.

Britt Øverland - One of the best experts on this subject based on the ideXlab platform.

  • evaluation of a portable recording device reggie with actimeter and nasopharyngeal Esophagus Catheter incorporated
    Respiration, 2005
    Co-Authors: Britt Øverland, Guttorm Bruskeland, Harriet Akre, Olav Skatvedt
    Abstract:

    Background: Portable recording devices without electroencephalogram recordings are frequently used for diagnosis of sleep-disordered breathing. However, an exact measure of sleep is important, since the diagnosis is based on the average number of events per hour of sleep, the apnea/hypopnea index (AHI). Actimetry is a simplified method for distinguishing sleep and wakefulness by measurements of activity. Objectives: In this study, recording with a portable recording device (Reggie) including an incorporated actimeter and polysomnography were done simultaneously in order to test the effect of the actimeter. Methods: The study was performed at the sleep-related breathing disorder unit at the Ullevaal University Hospital, Oslo, Norway. Fifty-two consecutive patients referred to the hospital for diagnosis of sleep-disordered breathing were included. Results: There is agreement between the AHI obtained from the polysomnography and the AHI obtained from the Reggie system. The estimated mean difference is 3.5, with an SD of 5.3 (r = 0.98). The sleep time calculated with the Reggie system is greater than the sleep time obtained by polysomnography, the mean difference being 46 min, SD 56 min (r = 0.45). Conclusions: Sleep time calculations with the Reggie system overestimate the sleep time. Still, the AHIs obtained by the two systems show good agreement. There is a slight tendency for the Reggie system to provide an AHI which is too low. This difference is small, and in most cases, it will be of no clinical significance.

  • Evaluation of a portable recording device (Reggie) with actimeter and nasopharyngeal/Esophagus Catheter incorporated.
    Respiration; international review of thoracic diseases, 2005
    Co-Authors: Britt Øverland, Guttorm Bruskeland, Harriet Akre, Olav Skatvedt
    Abstract:

    Background: Portable recording devices without electroencephalogram recordings are frequently used for diagnosis of sleep-disordered breathing. However, an exact measure of sleep is important, since the diagnosis is based on the average number of events per hour of sleep, the apnea/hypopnea index (AHI). Actimetry is a simplified method for distinguishing sleep and wakefulness by measurements of activity. Objectives: In this study, recording with a portable recording device (Reggie) including an incorporated actimeter and polysomnography were done simultaneously in order to test the effect of the actimeter. Methods: The study was performed at the sleep-related breathing disorder unit at the Ullevaal University Hospital, Oslo, Norway. Fifty-two consecutive patients referred to the hospital for diagnosis of sleep-disordered breathing were included. Results: There is agreement between the AHI obtained from the polysomnography and the AHI obtained from the Reggie system. The estimated mean difference is 3.5, with an SD of 5.3 (r = 0.98). The sleep time calculated with the Reggie system is greater than the sleep time obtained by polysomnography, the mean difference being 46 min, SD 56 min (r = 0.45). Conclusions: Sleep time calculations with the Reggie system overestimate the sleep time. Still, the AHIs obtained by the two systems show good agreement. There is a slight tendency for the Reggie system to provide an AHI which is too low. This difference is small, and in most cases, it will be of no clinical significance.

Guttorm Bruskeland - One of the best experts on this subject based on the ideXlab platform.

  • evaluation of a portable recording device reggie with actimeter and nasopharyngeal Esophagus Catheter incorporated
    Respiration, 2005
    Co-Authors: Britt Øverland, Guttorm Bruskeland, Harriet Akre, Olav Skatvedt
    Abstract:

    Background: Portable recording devices without electroencephalogram recordings are frequently used for diagnosis of sleep-disordered breathing. However, an exact measure of sleep is important, since the diagnosis is based on the average number of events per hour of sleep, the apnea/hypopnea index (AHI). Actimetry is a simplified method for distinguishing sleep and wakefulness by measurements of activity. Objectives: In this study, recording with a portable recording device (Reggie) including an incorporated actimeter and polysomnography were done simultaneously in order to test the effect of the actimeter. Methods: The study was performed at the sleep-related breathing disorder unit at the Ullevaal University Hospital, Oslo, Norway. Fifty-two consecutive patients referred to the hospital for diagnosis of sleep-disordered breathing were included. Results: There is agreement between the AHI obtained from the polysomnography and the AHI obtained from the Reggie system. The estimated mean difference is 3.5, with an SD of 5.3 (r = 0.98). The sleep time calculated with the Reggie system is greater than the sleep time obtained by polysomnography, the mean difference being 46 min, SD 56 min (r = 0.45). Conclusions: Sleep time calculations with the Reggie system overestimate the sleep time. Still, the AHIs obtained by the two systems show good agreement. There is a slight tendency for the Reggie system to provide an AHI which is too low. This difference is small, and in most cases, it will be of no clinical significance.

  • Evaluation of a portable recording device (Reggie) with actimeter and nasopharyngeal/Esophagus Catheter incorporated.
    Respiration; international review of thoracic diseases, 2005
    Co-Authors: Britt Øverland, Guttorm Bruskeland, Harriet Akre, Olav Skatvedt
    Abstract:

    Background: Portable recording devices without electroencephalogram recordings are frequently used for diagnosis of sleep-disordered breathing. However, an exact measure of sleep is important, since the diagnosis is based on the average number of events per hour of sleep, the apnea/hypopnea index (AHI). Actimetry is a simplified method for distinguishing sleep and wakefulness by measurements of activity. Objectives: In this study, recording with a portable recording device (Reggie) including an incorporated actimeter and polysomnography were done simultaneously in order to test the effect of the actimeter. Methods: The study was performed at the sleep-related breathing disorder unit at the Ullevaal University Hospital, Oslo, Norway. Fifty-two consecutive patients referred to the hospital for diagnosis of sleep-disordered breathing were included. Results: There is agreement between the AHI obtained from the polysomnography and the AHI obtained from the Reggie system. The estimated mean difference is 3.5, with an SD of 5.3 (r = 0.98). The sleep time calculated with the Reggie system is greater than the sleep time obtained by polysomnography, the mean difference being 46 min, SD 56 min (r = 0.45). Conclusions: Sleep time calculations with the Reggie system overestimate the sleep time. Still, the AHIs obtained by the two systems show good agreement. There is a slight tendency for the Reggie system to provide an AHI which is too low. This difference is small, and in most cases, it will be of no clinical significance.

Harriet Akre - One of the best experts on this subject based on the ideXlab platform.

  • evaluation of a portable recording device reggie with actimeter and nasopharyngeal Esophagus Catheter incorporated
    Respiration, 2005
    Co-Authors: Britt Øverland, Guttorm Bruskeland, Harriet Akre, Olav Skatvedt
    Abstract:

    Background: Portable recording devices without electroencephalogram recordings are frequently used for diagnosis of sleep-disordered breathing. However, an exact measure of sleep is important, since the diagnosis is based on the average number of events per hour of sleep, the apnea/hypopnea index (AHI). Actimetry is a simplified method for distinguishing sleep and wakefulness by measurements of activity. Objectives: In this study, recording with a portable recording device (Reggie) including an incorporated actimeter and polysomnography were done simultaneously in order to test the effect of the actimeter. Methods: The study was performed at the sleep-related breathing disorder unit at the Ullevaal University Hospital, Oslo, Norway. Fifty-two consecutive patients referred to the hospital for diagnosis of sleep-disordered breathing were included. Results: There is agreement between the AHI obtained from the polysomnography and the AHI obtained from the Reggie system. The estimated mean difference is 3.5, with an SD of 5.3 (r = 0.98). The sleep time calculated with the Reggie system is greater than the sleep time obtained by polysomnography, the mean difference being 46 min, SD 56 min (r = 0.45). Conclusions: Sleep time calculations with the Reggie system overestimate the sleep time. Still, the AHIs obtained by the two systems show good agreement. There is a slight tendency for the Reggie system to provide an AHI which is too low. This difference is small, and in most cases, it will be of no clinical significance.

  • Evaluation of a portable recording device (Reggie) with actimeter and nasopharyngeal/Esophagus Catheter incorporated.
    Respiration; international review of thoracic diseases, 2005
    Co-Authors: Britt Øverland, Guttorm Bruskeland, Harriet Akre, Olav Skatvedt
    Abstract:

    Background: Portable recording devices without electroencephalogram recordings are frequently used for diagnosis of sleep-disordered breathing. However, an exact measure of sleep is important, since the diagnosis is based on the average number of events per hour of sleep, the apnea/hypopnea index (AHI). Actimetry is a simplified method for distinguishing sleep and wakefulness by measurements of activity. Objectives: In this study, recording with a portable recording device (Reggie) including an incorporated actimeter and polysomnography were done simultaneously in order to test the effect of the actimeter. Methods: The study was performed at the sleep-related breathing disorder unit at the Ullevaal University Hospital, Oslo, Norway. Fifty-two consecutive patients referred to the hospital for diagnosis of sleep-disordered breathing were included. Results: There is agreement between the AHI obtained from the polysomnography and the AHI obtained from the Reggie system. The estimated mean difference is 3.5, with an SD of 5.3 (r = 0.98). The sleep time calculated with the Reggie system is greater than the sleep time obtained by polysomnography, the mean difference being 46 min, SD 56 min (r = 0.45). Conclusions: Sleep time calculations with the Reggie system overestimate the sleep time. Still, the AHIs obtained by the two systems show good agreement. There is a slight tendency for the Reggie system to provide an AHI which is too low. This difference is small, and in most cases, it will be of no clinical significance.

Schrock Steffen - One of the best experts on this subject based on the ideXlab platform.

  • 3d print of heart rhythm model with cryoballoon Catheter ablation of pulmonary vein
    Berlin Boston : Walter de Gruyter, 2019
    Co-Authors: Wehsener Sandra, Heinke Matthias, Müssig Robin, Hörth Johannes, Junk Stefan, Schrock Steffen
    Abstract:

    The visualization of heart rhythm disturbance and atrial fibrillation therapy allows the optimization of new cardiac Catheter ablations. With the simulation software CST (Computer Simulation Technology, Darmstadt) electromagnetic and thermal simulations can be carried out to analyze and optimize different heart rhythm disturbance and cardiac Catheters for pulmonary vein isolation. Another form of visualization is provided by haptic, three-dimensional print models. These models can be produced using an additive manufacturing method, such as a 3d printer. The aim of the study was to produce a 3d print of the Offenburg heart rhythm model with a representation of an atrial fibrillation ablation procedure to improve the visualization of simulation of cardiac Catheter ablation. The basis of 3d printing was the Offenburg heart rhythm model and the associated simulation of cryoablation of the pulmonary vein. The thermal simulation shows the pulmonary vein isolation of the left inferior pulmonary vein with the cryoballoon Catheter Arctic Front Advance™ from Medtronic. After running through the simulation, the thermal propagation during the procedure was shown in the form of different colors. The three-dimensional print models were constructed on the base of the described simulation in a CAD program. Four different 3d printers are available for this purpose in a rapid prototyping laboratory at the University of Applied Science Offenburg. Two different printing processes were used and a final print model with additional representation of the Esophagus and internal Esophagus Catheter was also prepared for printing. With the help of the thermal simulation results and the subsequent evaluation, it was possible to draw a conclusion about the propagation of the cold emanating from the Catheter in the myocardium and the surrounding tissue. It was measured that just 3 mm from the balloon surface into the myocardium the temperature dropped to 25 °C. The simulation model was printed using two 3d printing methods. Both methods, as well as the different printing materials offer different advantages and disadvantages. All relevant parts, especially the balloon Catheter and the conduction, are realistically represented. Only the thermal propagation in the form of different colors is not shown on this model. Three-dimensional heart rhythm models as well as virtual simulations allow very clear visualization of complex cardiac rhythm therapy and atrial fibrillation treatment methods. The printed models can be used for optimization and demonstration of cryoballoon Catheter ablation in patients with atrial fibrillation

  • Abstract: 3D print of heart rhythm model with cryoballoon Catheter ablation of pulmonary vein
    Berlin Boston : Walter de Gruyter, 2019
    Co-Authors: Wehsener Sandra, Heinke Matthias, Müssig Robin, Hörth Johannes, Junk Stefan, Schrock Steffen
    Abstract:

    The visualization of heart rhythm disturbance and atrial fibrillation therapy allow the optimization of new cardiac Catheter ablations. With the simulation software CST (Computer Simulation Technology, Darmstadt) electromagnetic and thermal simulations can be carried out to analyze and optimize different heart rhythm disturbance and cardiac Catheters for pulmonary vein isolation. Another form of visualization is provided by haptic, three-dimensional print models. These models can be produced using an additive manufacturing method, such as a 3D printer. The aim of the study was to produce a 3D print of the Offenburg heart rhythm model with a representation of an atrial fibrillation ablation procedure to improve the visualization of simulation of cardiac Catheter ablation. The basis of 3D printing was the Offenburg heart rhythm model and the associated simulation of cryoablation of the pulmonary vein. The thermal simulation shows the pulmonary vein isolation of the left inferior pulmonary vein with the cryoballoon Catheter Arctic Front AdvanceTM from Medtronic. After running through the simulation, the thermal propagation during the procedure was shown in the form of different colors. The three-dimensional print models were constructed on the base of the described simulation in a CAD program. Four different 3D printers are available for this purpose in a rapid prototyping laboratory at the University of Applied Science Offenburg. Two different printing processes were used: 1. a binder jetting printer with polymer gypsum and 2. a multi-material printer with photopolymer. A final print model with additional representation of the Esophagus and internal Esophagus Catheter was also prepared for printing. With the help of the thermal simulation results and the subsequent evaluation, it was possible to make a conclusion about the propagation of the cold emanating from the Catheter in the myocardium and the surrounding tissue. It could be measured that already 3 mm from the balloon surface into the myocardium the temperature drops to 25 °C. The simulation model was printed using two 3D printing methods. Both methods as well as the different printing materials offer different advantages and disadvantages. While the first model made of polymer gypsum can be produced quickly and cheaply, the second model made of photopolymer takes five times longer and was twice as expensive. On the other hand, the second model offers significantly better properties and was more durable overall. All relevant parts, especially the balloon Catheter and the conduction, are realistically represented. Only the thermal propagation in the form of different colors is not shown on this model. Three-dimensional heart rhythm models as well as virtual simulations allow a very good visualization of complex cardiac rhythm therapy and atrial fibrillation treatment methods. The printed models can be used for optimization and demonstration of cryoballoon Catheter ablation in patients with atrial fibrillation